diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 0000000..d3d7342
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,11 @@
+# This is a template `CODEOWNERS` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+# For more information about CODEOWNER, please refer to
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#example-of-a-codeowners-file
+
+# These owners will be the default owners for everything in the repo. Unless a
+# later match takes precedence, @canonical/bootstack will be requested for
+# review when someone opens a pull request.
+*       @canonical/bootstack-reviewers
diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
new file mode 100644
index 0000000..864ae61
--- /dev/null
+++ b/.github/workflows/pr.yaml
@@ -0,0 +1,23 @@
+# This is a template `pr.yaml` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+name: PR workflow running lint checkers, unit and functional tests
+
+on:
+  pull_request:
+    types: [ opened, synchronize, reopened ]
+    branches: [ master, main ]
+  pull_request_review:
+    types: [ submitted ]
+
+jobs:
+  pr:
+    uses: canonical/bootstack-actions/.github/workflows/pull-request.yaml@main
+    secrets: inherit
+    with:
+      python-version-unit: "['3.8', '3.10']"
+      python-version-func: "3.10"
+      tox-version: "<4"
+      snapcraft: true
+      commands: "['make functional']"
diff --git a/.github/workflows/sonar.yaml b/.github/workflows/sonar.yaml
new file mode 100644
index 0000000..07c56fd
--- /dev/null
+++ b/.github/workflows/sonar.yaml
@@ -0,0 +1,14 @@
+# This is a template `sonar.yaml` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+name: SonarCloud
+on:
+  workflow_run:
+    workflows: [PR workflow running lint checkers, unit and functional tests]
+    types: [completed]
+
+jobs:
+  sonar:
+    uses: canonical/bootstack-actions/.github/workflows/sonar.yaml@main
+    secrets: inherit
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b6b2573
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,43 @@
+# This is a template `.gitignore` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Tests files and dir
+.pytest_cache/
+.coverage
+.tox
+.venv
+reports/
+**/report/
+htmlcov/
+.mypy_cache
+
+# Log files
+*.log
+
+# IDEs
+.idea/
+.vscode/
+
+# vi
+.*.swp
+
+# version data
+repo-info
+
+# Python builds
+deb_dist/
+dist/
+*.egg-info/
+
+# Snaps
+*.snap
+
+# Builds
+.build/
+build/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..769738b
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,22 @@
+# This is a template `.pre-commit-config.yaml` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.3.0
+    hooks:
+      - id: check-executables-have-shebangs
+      - id: check-merge-conflict
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+      - id: check-added-large-files
+      - id: check-json
+      - id: check-yaml
+  - repo: local
+    hooks:
+      - id: lint
+        name: lint
+        entry: make lint
+        language: system
+        types: [ python ]
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+  If you convey a covered work, knowingly relying on a patent license,
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+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
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+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
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+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
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+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+  16. Limitation of Liability.
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+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
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+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
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+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..9cb0df0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,64 @@
+# This is a template `Makefile` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+PYTHON := /usr/bin/python3
+
+PROJECTPATH=$(dir $(realpath ${MAKEFILE_LIST}))
+SNAP_NAME=$(shell cat ${PROJECTPATH}/snap/snapcraft.yaml | grep -E '^name:' | awk '{print $$2}')
+SNAP_FILE=${PROJECTPATH}/${SNAP_NAME}.snap
+
+help:
+	@echo "This project supports the following targets"
+	@echo ""
+	@echo " make help - show this text"
+	@echo " make clean - remove unneeded files"
+	@echo " make dev-environment - setup the development environment"
+	@echo " make build - build the snap"
+	@echo " make lint - run lint checkers"
+	@echo " make reformat - run lint tools to auto format code"
+	@echo " make unittests - run the tests defined in the unittest subdirectory"
+	@echo " make functional - run the tests defined in the functional subdirectory"
+	@echo " make test - run lint, proof, unittests and functional targets"
+	@echo " make pre-commit - run pre-commit checks on all the files"
+	@echo ""
+
+lint:
+	@echo "Running lint checks"
+	@tox -e lint
+
+unittests:
+	@echo "Running unit tests"
+	@tox -e unit -- ${UNIT_ARGS}
+
+test: lint unittests functional
+	@echo "Tests completed for the snap."
+
+reformat:
+	@echo "Reformat files with black and isort"
+	@tox -e reformat
+
+build:
+	@echo "Building the snap"
+	@snapcraft --use-lxd
+	@bash -c ./rename.sh
+
+clean:
+	@echo "Cleaning snap"
+	@snapcraft clean --use-lxd
+	@echo "Cleaning existing snap builds"
+	@rm -rf ${SNAP_FILE}
+
+dev-environment:
+	@echo "Creating virtualenv and installing pre-commit"
+	@tox -r -e dev-environment
+
+functional: build
+	@echo "Executing functional tests using built snap"
+	@TEST_SNAP=${SNAP_FILE} tox -e func -- ${FUNC_ARGS}
+
+pre-commit:
+	@tox -e pre-commit
+
+# The targets below don't depend on a file
+.PHONY: help clean dev-environment build lint reformat unittests functional test pre-commit
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5fce1df
--- /dev/null
+++ b/README.md
@@ -0,0 +1,64 @@
+# Prometheus Exporter Snap for charm-hardware
+
+
+## Getting Started
+
+Install the snap from snap store:
+
+```bash
+$ sudo snap install prometheus-hardware-exporter --classic
+```
+
+Start the exporter:
+
+```bash
+$ sudo snap start prometheus-hardware-exporter
+```
+
+## Snap Configuration
+
+The install hook (`./snap/hooks/install`) will generate a default configuration
+for the exporter. By default, the exporter is started at port 10000 with a
+logging level of INFO.
+
+You can change the default configuration by editing
+
+```bash
+$ /var/snap/prometheus-hardware-exporter/current/config.yaml
+```
+
+and then restart the snap by
+
+```bash
+$ sudo snap restart prometheus-hardware-exporter
+```
+
+## Local Build and Testing
+
+You need `snapcraft` to build the snap:
+
+```bash
+$ sudo snap install snapcraft --classic
+```
+
+Snapcraft also requires backend to create isolated build environment, you can
+choose the following two backends:
+
+- [LXD](https://linuxcontainers.org/lxd/introduction/), which creates container
+  image build instances. It can be used inside virtual machines.
+- [Multipass](https://multipass.run/), which creates virtual machine build
+  instances. It cannot be reliably used on platforms that do not support nested
+  virtualization. For instance, Multipass will most likely not run inside a
+  virtual machine itself.
+
+To build the snap:
+
+```bash
+$ make build
+```
+
+To try the snap that was built, you can install it locally:
+
+```bash
+$ sudo snap install --devmode ./$(grep -E "^name:" snap/snapcraft.yaml | awk '{print $2}').snap
+```
diff --git a/prometheus_hardware_exporter/__init__.py b/prometheus_hardware_exporter/__init__.py
new file mode 100644
index 0000000..8348d5c
--- /dev/null
+++ b/prometheus_hardware_exporter/__init__.py
@@ -0,0 +1,9 @@
+"""Configuring global logger."""
+
+import logging
+
+logging.basicConfig(
+    level=logging.WARNING,
+    datefmt="%Y-%m-%d %H:%M:%S",
+    format="%(asctime)s %(levelname)s %(message)s",
+)
diff --git a/prometheus_hardware_exporter/__main__.py b/prometheus_hardware_exporter/__main__.py
new file mode 100644
index 0000000..78f42ef
--- /dev/null
+++ b/prometheus_hardware_exporter/__main__.py
@@ -0,0 +1,43 @@
+"""Package entrypoint."""
+
+import argparse
+import logging
+
+from .collector import MegaRAIDCollector
+from .config import DEFAULT_CONFIG, Config
+from .exporter import Exporter
+
+root_logger = logging.getLogger()
+
+
+def parse_command_line() -> argparse.Namespace:
+    """Command line parser.
+
+    Parse command line arguments and return the arguments.
+
+    Returns:
+        args: Command line arguments.
+    """
+    parser = argparse.ArgumentParser(
+        prog=__package__,
+        description=__doc__,
+    )
+    parser.add_argument("-c", "--config", help="Set configuration file.", default="", type=str)
+    args = parser.parse_args()
+
+    return args
+
+
+def main() -> None:
+    """Start the prometheus-hardware-exporter."""
+    args = parse_command_line()
+    config = Config.load_config(config_file=args.config or DEFAULT_CONFIG)
+    root_logger.setLevel(logging.getLevelName(config.level))
+
+    exporter = Exporter(config.port)
+    exporter.register(MegaRAIDCollector())
+    exporter.run()
+
+
+if __name__ == "__main__":  # pragma: no cover
+    main()
diff --git a/prometheus_hardware_exporter/collector.py b/prometheus_hardware_exporter/collector.py
new file mode 100644
index 0000000..e0b8910
--- /dev/null
+++ b/prometheus_hardware_exporter/collector.py
@@ -0,0 +1,111 @@
+"""Module for a collection of hardware collecters."""
+
+from logging import getLogger
+from typing import Dict, List
+
+from prometheus_client.metrics_core import GaugeMetricFamily
+
+from .collectors.storcli import StorCLI
+from .core import BlockingCollector, Payload, Specification
+
+logger = getLogger(__name__)
+
+
+class MegaRAIDCollector(BlockingCollector):
+    """Collector for MegaRAID controller."""
+
+    storcli = StorCLI()
+
+    @property
+    def specifications(self) -> List[Specification]:
+        """Define MegaRAID metric specs."""
+        return [
+            Specification(
+                name="megaraid_controllers",
+                documentation="Total number of controllers",
+                labels=["hostname"],
+                metric_class=GaugeMetricFamily,
+            ),
+            Specification(
+                name="megaraid_virtual_drive",
+                documentation="Number of virtual drives",
+                labels=["controller_id"],
+                metric_class=GaugeMetricFamily,
+            ),
+            Specification(
+                name="megaraid_virtual_drive_state",
+                documentation="Indicates the state of virtual drive",
+                labels=["controller_id", "virtual_drive_id", "state"],
+                metric_class=GaugeMetricFamily,
+            ),
+            Specification(
+                name="megaraid_virtual_drive_cache_policy",
+                documentation="Indicates the cache policy of virtual drive",
+                labels=["controller_id", "virtual_drive_id", "cache_policy"],
+                metric_class=GaugeMetricFamily,
+            ),
+            Specification(
+                name="storcli_command_success",
+                documentation="Indicates the if command is successful or not",
+                labels=[],
+                metric_class=GaugeMetricFamily,
+            ),
+        ]
+
+    def fetch(self) -> List[Payload]:
+        """Load the MegaRAID related information."""
+        controller_payload, error_con = self.storcli.get_controllers()
+        virtual_drives_payload, error_vd = self.storcli.get_all_virtual_drives()
+
+        if any([error_con, error_vd]):
+            logger.error(
+                "Failed to get MegaRAID controller information using %s", self.storcli.command
+            )
+            return [
+                Payload(
+                    name="storcli_command_success",
+                    labels=[],
+                    value=0.0,
+                )
+            ]
+
+        payloads = [
+            Payload(
+                name="megaraid_controllers",
+                labels=[controller_payload["hostname"]],  # type: ignore[index]
+                value=controller_payload["count"],  # type: ignore[index]
+            ),
+            Payload(
+                name="storcli_command_success",
+                labels=[],
+                value=1.0,
+            ),
+        ]
+        for ctrl_id, vds_payload in virtual_drives_payload.items():  # type: ignore[union-attr]
+            payloads.append(
+                Payload(
+                    name="megaraid_virtual_drive",
+                    labels=[str(ctrl_id)],
+                    value=len(vds_payload),  # type: ignore[arg-type]
+                )
+            )
+            for vd_payload in vds_payload:  # type: ignore[union-attr]
+                payloads.append(
+                    Payload(
+                        name="megaraid_virtual_drive_state",
+                        labels=[vd_payload["DG"], vd_payload["VD"], vd_payload["state"]],
+                        value=1.0,
+                    )
+                )
+                payloads.append(
+                    Payload(
+                        name="megaraid_virtual_drive_cache_policy",
+                        labels=[vd_payload["DG"], vd_payload["VD"], vd_payload["cache"]],
+                        value=1.0,
+                    )
+                )
+        return payloads
+
+    def process(self, payloads: List[Payload], datastore: Dict[str, Payload]) -> List[Payload]:
+        """Process the payload if needed."""
+        return payloads
diff --git a/prometheus_hardware_exporter/collectors/__init__.py b/prometheus_hardware_exporter/collectors/__init__.py
new file mode 100644
index 0000000..a200ff9
--- /dev/null
+++ b/prometheus_hardware_exporter/collectors/__init__.py
@@ -0,0 +1 @@
+"""Init file for collectors submodule."""
diff --git a/prometheus_hardware_exporter/collectors/storcli.py b/prometheus_hardware_exporter/collectors/storcli.py
new file mode 100644
index 0000000..d10384d
--- /dev/null
+++ b/prometheus_hardware_exporter/collectors/storcli.py
@@ -0,0 +1,132 @@
+"""Collector for MegaRAID controller."""
+
+import re
+from logging import getLogger
+from typing import Any, Dict, List, Optional, Tuple
+
+from ..utils import Command
+
+logger = getLogger(__name__)
+
+
+class StorCLI(Command):
+    """Command line tool for MegaRAID Controller."""
+
+    prefix = ""
+    command = "storcli"
+    installed = False
+
+    def _get_all_virtual_drives(
+        self, controller: int
+    ) -> Tuple[Optional[List[Dict[str, str]]], Optional[Exception]]:
+        """Get all virtual drive information in this controller.
+
+        Equivalent to running `storcli /cx/vall show all` for controller "x".
+
+        Returns:
+            virtual_drive: dictionary of a virtual drive information or None
+            error: an exception if there is any or None
+        """
+        result, error = self(f"/c{controller}/vall show J")
+        if error:
+            return None, error
+
+        dg_vd_regex = re.compile(r'"DG\/VD"\s*:\s*"(\d*)\/(\d*)"')
+        state_regex = re.compile(r'"State"\s*:\s*"(\w*)"')
+        cache_regex = re.compile(r'"Cache"\s*:\s*"(\w*)"')
+        dg_vd_matches = dg_vd_regex.findall(result)  # type: ignore[arg-type]
+        state_matches = state_regex.findall(result)  # type: ignore[arg-type]
+        cache_matches = cache_regex.findall(result)  # type: ignore[arg-type]
+        if not all([dg_vd_matches, state_matches, cache_matches]):
+            return None, ValueError(
+                f"Controller {controller}: cannot get virtual drive information."
+            )
+
+        payloads = []
+        for ctrl_id, virtual_device, state, cache in zip(
+            [i[0] for i in dg_vd_matches],
+            [i[1] for i in dg_vd_matches],
+            state_matches,
+            cache_matches,
+        ):
+            payloads.append(
+                {
+                    "DG": ctrl_id,
+                    "VD": virtual_device,
+                    "state": state,
+                    "cache": cache,
+                }
+            )
+        return payloads, None
+
+    def _get_controller_ids(self) -> Tuple[Optional[List[int]], Optional[Exception]]:
+        """Get controller ids.
+
+        Returns:
+            ids: list of controller ids, or None
+            error: an exception if there is any, or None
+        """
+        result, error = self("show ctrlcount J")
+        if error:
+            return None, ValueError("Cannot get controller ids.")
+
+        num_controller_regex = re.compile(r'"Controller Count"\s*:\s*(?P<num>\d*)')
+        num_match = num_controller_regex.search(result)  # type: ignore[arg-type]
+        if not num_match:
+            error_msg = "Cannot get the number of controllers."
+            return None, ValueError(error_msg)
+
+        return list(range(int(num_match.group("num")))), None
+
+    def get_controllers(self) -> Tuple[Optional[Dict[str, Any]], Optional[Exception]]:
+        """Get the number of controller.
+
+        Returns:
+            payload: a dictionary of number of controller and hostname, or None
+            error: an exception if there is any, or None
+        """
+        result, error = self("show all J")
+        if error:
+            logger.error("Cannot get the number of controllers.")
+            return None, error
+
+        num_controller_regex = re.compile(r'"Number of Controllers"\s*:\s*(?P<num>\d*)')
+        hostename_regex = re.compile(r'"Host Name"\s*:\s*"(?P<hostname>\w*)"')
+        num_match = num_controller_regex.search(result)  # type: ignore[arg-type]
+        hostname_match = hostename_regex.search(result)  # type: ignore[arg-type]
+        if not all([num_match, hostname_match]):
+            error_msg = "Cannot get controller's information."
+            logger.error(error_msg)
+            return None, ValueError(error_msg)
+
+        payload = {
+            "count": int(num_match.group("num")),  # type: ignore[union-attr]
+            "hostname": hostname_match.group("hostname"),  # type: ignore[union-attr]
+        }
+        return payload, None
+
+    def get_all_virtual_drives(
+        self,
+    ) -> Tuple[Optional[Dict[int, Optional[List[Dict[str, str]]]]], Optional[Exception]]:
+        """Get all virtual drive information.
+
+        Equivalent to running `storcli /cx/vall show all` for all controller "x".
+
+        Returns:
+            virtual_drives: dictionary of all virtual drive information or None
+            error: an exception if there is any or None
+        """
+        ids, error = self._get_controller_ids()
+        if error:
+            logger.error(str(error))
+            return None, error
+
+        payload = {}
+        if ids:
+            for controller_id in ids:
+                vd_payload, error = self._get_all_virtual_drives(controller_id)
+                if error:
+                    logger.error(str(error))
+                    return None, error
+                payload[controller_id] = vd_payload
+        return payload, None
diff --git a/prometheus_hardware_exporter/config.py b/prometheus_hardware_exporter/config.py
new file mode 100644
index 0000000..c1b5f6b
--- /dev/null
+++ b/prometheus_hardware_exporter/config.py
@@ -0,0 +1,50 @@
+"""Module for hardware related configuration."""
+
+import os
+from logging import getLogger
+
+from pydantic import BaseModel, validator
+from yaml import safe_load
+
+logger = getLogger(__name__)
+
+DEFAULT_CONFIG = os.path.join(os.environ.get("SNAP_DATA", "./"), "config.yaml")
+
+
+class Config(BaseModel):
+    """Juju backup all configuration."""
+
+    port: int = 10000
+    level: str = "DEBUG"
+
+    @validator("port")
+    def validate_port_range(cls, port: int) -> int:  # noqa: N805 pylint: disable=E0213
+        """Validate port range."""
+        if not 1 <= port <= 65535:
+            msg = "Port must be in [1, 65535]."
+            logger.error(msg)
+            raise ValueError(msg)
+        return port
+
+    @validator("level")
+    def validate_level_choice(cls, level: str) -> str:  # noqa: N805 pylint: disable=E0213
+        """Validate logging level choice."""
+        level = level.upper()
+        choices = {"DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"}
+        if level not in choices:
+            msg = f"Level must be in {choices} (case-insensitive)."
+            logger.error(msg)
+            raise ValueError(msg)
+        return level
+
+    @classmethod
+    def load_config(cls, config_file: str = DEFAULT_CONFIG) -> "Config":
+        """Load configuration file and validate it."""
+        if not os.path.exists(config_file):
+            msg = f"Configuration file: {config_file} not exists."
+            logger.error(msg)
+            raise ValueError(msg)
+        with open(config_file, "r", encoding="utf-8") as config:
+            logger.info("Loaded exporter configuration: %s.", config_file)
+            data = safe_load(config) or {}
+            return cls(**data)
diff --git a/prometheus_hardware_exporter/core.py b/prometheus_hardware_exporter/core.py
new file mode 100644
index 0000000..012c5d8
--- /dev/null
+++ b/prometheus_hardware_exporter/core.py
@@ -0,0 +1,131 @@
+"""Module for collecter core codes."""
+
+from abc import abstractmethod
+from dataclasses import dataclass
+from logging import getLogger
+from typing import Dict, Iterable, List, Optional, Type
+
+from prometheus_client.metrics_core import Metric
+from prometheus_client.registry import Collector
+
+from .config import Config
+
+logger = getLogger(__name__)
+
+
+@dataclass
+class Payload:
+    """Container of data for each timeseries."""
+
+    name: str
+    value: float
+    labels: List[str]
+    uuid: str = ""  # timeseries's name
+
+    def __post_init__(self) -> None:
+        """Create uuid based on metric name and labels."""
+        self.uuid = f"{self.name}({self.labels})"
+
+
+@dataclass
+class Specification:
+    """Specification for metrics."""
+
+    name: str
+    labels: List[str]
+    documentation: str
+    metric_class: Type[Metric]
+
+
+class BlockingCollector(Collector):
+    """Base class for blocking collector.
+
+    BlockingCollector base class is intended to be used when the collector is
+    fetching data in a blocking fashion. For example, if the fetching process
+    is reading data from files.
+    """
+
+    def __init__(self, config: Optional[Config] = None) -> None:
+        """Initialize the class."""
+        self.config = config
+        self._datastore: Dict[str, Payload] = {}
+        self._specs = {spec.name: spec for spec in self.specifications}
+
+    @abstractmethod
+    def fetch(self) -> List[Payload]:
+        """User defined method for fetching data.
+
+        User should defined their own method for loading data synchronously.
+        The return should be a list of `Payload` class; the return value will
+        be passed to user defined `process` method that should define how the
+        data are used to update the metris.
+
+        Returns:
+            A list of payloads to be processed.
+        """
+
+    @abstractmethod
+    def process(self, payloads: List[Payload], datastore: Dict[str, Payload]) -> List[Payload]:
+        """User defined method for processing the fetched data.
+
+        User should defined their own method for processing payloads. This
+        includes how to update the metrics using the payloads, and returns the
+        processed payload.
+
+        Args:
+            payloads: the fetched data to be processed.
+            datastore: the data store for holding previous payloads.
+
+        Returns:
+            The proecssed payloads.
+        """
+
+    @property
+    @abstractmethod
+    def specifications(self) -> List[Specification]:
+        """User defined property that defines the metrics.
+
+        Returns:
+            A list of specification.
+        """
+
+    def init_default_datastore(self, payloads: List[Payload]) -> None:
+        """Initialize or fill data the store with default values.
+
+        Args:
+            payloads: the fetched data to be processed.
+        """
+        for payload in payloads:
+            if payload.uuid not in self._datastore:
+                self._datastore[payload.uuid] = Payload(
+                    name=payload.name, labels=payload.labels, value=0.0
+                )
+
+    def collect(self) -> Iterable[Metric]:
+        """Fetch data and update the internal metrics.
+
+        This is a callback method that is used internally within
+        `prometheus_client` every time the exporter server is queried. There is
+        not return values for this method but it needs to yield all the metrics.
+
+        Yields:
+            metrics: the internal metrics
+        """
+        payloads = self.fetch()
+        self.init_default_datastore(payloads)
+        processed_payloads = self.process(payloads, self._datastore)
+
+        # unpacked and create metrics
+        for payload in processed_payloads:
+            spec = self._specs[payload.name]
+            # We have to ignore the type checking here, since the subclass of
+            # any metric family from prometheus client adds new attributes and
+            # methods.
+            metric = spec.metric_class(  # type: ignore[call-arg]
+                name=spec.name, labels=spec.labels, documentation=spec.documentation
+            )
+            metric.add_metric(  # type: ignore[attr-defined]
+                labels=payload.labels, value=payload.value
+            )
+            yield metric
+            self._datastore[payload.uuid] = payload
diff --git a/prometheus_hardware_exporter/exporter.py b/prometheus_hardware_exporter/exporter.py
new file mode 100644
index 0000000..252ecf4
--- /dev/null
+++ b/prometheus_hardware_exporter/exporter.py
@@ -0,0 +1,59 @@
+"""Module for hardware exporter."""
+
+import threading
+from logging import getLogger
+from socketserver import ThreadingMixIn
+from typing import Any
+from wsgiref.simple_server import WSGIRequestHandler, WSGIServer, make_server
+
+from prometheus_client import make_wsgi_app
+from prometheus_client.core import REGISTRY
+from prometheus_client.registry import Collector
+
+logger = getLogger(__name__)
+
+
+class ThreadingWSGIServer(ThreadingMixIn, WSGIServer):
+    """A WSGI server that handle requests in a separate thread."""
+
+    daemon_threads = True
+
+
+class SlientRequestHandler(WSGIRequestHandler):
+    """A Slient Request handler."""
+
+    def log_message(self, format: str, *args: Any) -> None:  # pylint: disable=W0622
+        """Log nothing."""
+
+
+class Exporter:
+    """The exporter class."""
+
+    def __init__(self, port: int, addr: str = "0.0.0.0") -> None:
+        """Initialize the exporter class.
+
+        Args:
+            port: Start the exporter at this port.
+            addr: Start the exporter at this address.
+        """
+        self.addr = addr
+        self.port = int(port)
+        self.app = make_wsgi_app()
+
+    def register(self, collector: Collector) -> None:
+        """Register collector to the exporter."""
+        REGISTRY.register(collector)
+
+    def run(self, daemon: bool = False) -> None:
+        """Start the exporter server."""
+        httpd = make_server(
+            self.addr,
+            self.port,
+            self.app,
+            server_class=ThreadingWSGIServer,
+            handler_class=SlientRequestHandler,
+        )
+        logger.info("Started promethesus hardware exporter at %s:%s.", self.addr, self.port)
+        thread = threading.Thread(target=httpd.serve_forever)
+        thread.daemon = daemon
+        thread.start()
diff --git a/prometheus_hardware_exporter/utils.py b/prometheus_hardware_exporter/utils.py
new file mode 100644
index 0000000..81b75de
--- /dev/null
+++ b/prometheus_hardware_exporter/utils.py
@@ -0,0 +1,82 @@
+"""Module for helper functions."""
+
+import subprocess
+from logging import getLogger
+from typing import Optional, Tuple
+
+logger = getLogger(__name__)
+
+
+class CommandNotFoundError(Exception):
+    """Command not found error."""
+
+
+class CommandExecutionError(Exception):
+    """Command excution error error."""
+
+
+class Command:
+    """Generic wrapper for command line tool."""
+
+    prefix = ""
+    command = ""
+    installed = False
+
+    def __init__(self) -> None:
+        """Initialize the Command class."""
+        self.installed = self.check_installed()
+
+    def __call__(self, args: Optional[str] = None) -> Tuple[Optional[str], Optional[Exception]]:
+        """Run the command, and return the result and error.
+
+        Returns:
+            result: output of the command or None
+            error: an exception of None
+        """
+        if not self.installed:
+            error = CommandNotFoundError(f"{self.command} not installed.")
+            logger.error(str(error))
+            return None, error
+
+        result, error = self.check_output(args=args)  # type: ignore[assignment]
+        if error:
+            logger.error(str(error))
+            return None, error
+        return result, error
+
+    def check_installed(self) -> bool:
+        """Check if the command is installed or not.
+
+        Returns:
+            True if the command can be found else False.
+        """
+        _, error = self.check_output(prefix="", command=f"which {self.command}")
+        if error:
+            return False
+        return True
+
+    def check_output(
+        self,
+        prefix: Optional[str] = None,
+        command: Optional[str] = None,
+        args: Optional[str] = None,
+    ) -> Tuple[Optional[str], Optional[CommandExecutionError]]:
+        """Run the command, and return the result and error.
+
+        Returns:
+            result: output of the command or None
+            error: an exception of None
+        """
+        error = None
+        result = None
+        args = args if args is not None else ""
+        prefix = prefix if prefix is not None else self.prefix
+        command = command if command is not None else self.command
+        full_command = " ".join([prefix, command, args]).strip()
+
+        logger.debug("Running command: %s", full_command)
+        try:
+            result = subprocess.check_output(full_command, shell=True).decode().strip()
+        except subprocess.CalledProcessError as err:
+            error = CommandExecutionError(err)
+        return result, error
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..943db6c
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,82 @@
+# This is a template `pyproject.toml` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+[tool.flake8]
+ignore = ["C901", "D100", "D101", "D102", "D103", "W503", "W504"]
+exclude = ['.eggs', '.git', '.tox', '.venv', '.build', 'build', 'report']
+max-line-length = 99
+max-complexity = 10
+
+[tool.black]
+line-length = 99
+exclude = '''
+/(
+    | .eggs
+    | .git
+    | .tox
+    | .venv
+    | .build
+    | build
+    | report
+)/
+'''
+
+[tool.isort]
+profile = "black"
+skip_glob = [
+  ".eggs",
+  ".git",
+  ".tox",
+  ".venv",
+  ".build",
+  "build",
+  "report"
+]
+
+[tool.pylint]
+max-line-length = 99
+ignore-paths = [
+  ".eggs",
+  ".git",
+  ".tox",
+  ".venv",
+  ".build",
+  "report",
+  "tests",
+]
+
+[tool.pylint.'MESSAGES CONTROL']
+extension-pkg-allow-list = "pydantic" # Fix pydantic issue in pylint, see https://github.com/pydantic/pydantic/issues/1961
+
+[tool.mypy]
+warn_unused_ignores = true
+warn_unused_configs = true
+warn_unreachable = true
+disallow_untyped_defs = true
+ignore_missing_imports = true
+exclude = [
+  ".eggs",
+  ".git",
+  ".tox",
+  ".venv",
+  ".build",
+  "lib",
+  "report",
+  "tests",
+]
+
+[tool.coverage.run]
+relative_files = true
+source = ["."]
+omit = ["tests/**", "docs/**", "lib/**", "snap/**", "build/**", "setup.py"]
+
+[tool.coverage.report]
+fail_under = 100
+show_missing = true
+
+[tool.coverage.html]
+directory = "tests/unit/report/html"
+
+[tool.coverage.xml]
+output = "tests/unit/report/coverage.xml"
diff --git a/rename.sh b/rename.sh
new file mode 100755
index 0000000..6d645e1
--- /dev/null
+++ b/rename.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+# This is a template `rename.sh` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+snap=$(grep -E "^name:" snap/snapcraft.yaml | awk '{print $2}')
+echo "renaming ${snap}_*.snap to ${snap}.snap"
+echo -n "pwd: "
+pwd
+ls -al
+echo "Removing previous snap if it exists"
+if [[ -e "${snap}.snap" ]];
+then
+    rm "${snap}.snap"
+fi
+echo "Renaming snap here."
+mv ${snap}_*.snap ${snap}.snap
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..0d11fbd
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+prometheus-client
+pydantic
+pyyaml
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..98ab668
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,28 @@
+"""Entrypoint for python package."""
+
+from setuptools import setup
+
+configs = {
+    "name": "prometheus-hardware-exporter",
+    "description": "exports hardware related metrics",
+    "use_scm_version": True,
+    "setup_requires": ["setuptools_scm", "pyyaml"],
+    "author": "Canonical BootStack DevOps Centres",
+    "packages": ["prometheus_hardware_exporter", "prometheus_hardware_exporter.collectors"],
+    "url": "https://github.com/canonical/prometheus-hardware-exporter",
+    "entry_points": {
+        "console_scripts": [
+            "prometheus-hardware-exporter=" + "prometheus_hardware_exporter.__main__:main",
+        ]
+    },
+}
+
+with open("LICENSE", encoding="utf-8") as f:
+    configs.update({"license": f.read()})
+
+with open("README.md", encoding="utf-8") as f:
+    configs.update({"long_description": f.read()})
+
+
+if __name__ == "__main__":
+    setup(**configs)
diff --git a/snap/hooks/install b/snap/hooks/install
new file mode 100755
index 0000000..abc511b
--- /dev/null
+++ b/snap/hooks/install
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# Generate a default config.yaml
+
+cat <<EOF > $SNAP_DATA/config.yaml
+port: 10000
+level: INFO
+EOF
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
new file mode 100644
index 0000000..e67013c
--- /dev/null
+++ b/snap/snapcraft.yaml
@@ -0,0 +1,30 @@
+name: prometheus-hardware-exporter
+base: core22
+adopt-info: prometheus-hardware-exporter
+summary: collects backup results and exports them as metrics
+description: |
+  The prometheus-hardware-exporter is a snap for collecting backup
+  results from charm-hardware, and export those results as prometheus
+  metrics. The metrics are expected to be used with prometheus.
+
+grade: stable
+confinement: classic
+
+apps:
+  prometheus-hardware-exporter:
+    daemon: simple
+    install-mode: disable
+    restart-condition: on-abnormal
+    command: bin/prometheus-hardware-exporter
+    plugs:
+      - network-bind
+
+parts:
+  prometheus-hardware-exporter:
+    source: .
+    plugin: python
+    python-requirements: [./requirements.txt]
+    override-build: |
+      snapcraftctl build
+      echo "Version: $(python3 setup.py --version)"
+      snapcraftctl set-version "$(python3 setup.py --version)"
diff --git a/sonar-project.properties b/sonar-project.properties
new file mode 100644
index 0000000..6a57aef
--- /dev/null
+++ b/sonar-project.properties
@@ -0,0 +1,8 @@
+sonar.projectKey = prometheus-hardware-exporter
+sonar.organization = bootstack-devops
+sonar.python.version = 3
+sonar.python.coverage.reportPaths = tests/unit/report/coverage.xml
+sonar.sources = prometheus_hardware_exporter/
+sonar.tests = tests/
+sonar.test.inclusions = test/**
+sonar.coverage.exclusions=tests/**, docs/**, contrib/**, snap/**, *
diff --git a/tests/functional/conftest.py b/tests/functional/conftest.py
new file mode 100644
index 0000000..bfd421a
--- /dev/null
+++ b/tests/functional/conftest.py
@@ -0,0 +1,64 @@
+import logging
+import os
+import time
+from subprocess import check_call
+
+import pytest
+
+TMP_DIR = "/tmp"
+SETUP_TIMEOUT = 5
+
+
+@pytest.fixture()
+def available_metric_names():
+    return [
+        "megaraid_controllers",
+        "megaraid_virtual_drive",
+        "megaraid_virtual_drive_state",
+        "megaraid_virtual_drive_cache_policy",
+        "storcli_command_success",
+    ]
+
+
+@pytest.fixture(scope="session")
+def snap_name():
+    return "prometheus-hardware-exporter"
+
+
+@pytest.fixture(scope="session")
+def snap_config(snap_name):
+    return f"/var/snap/{snap_name}/current/config.yaml"
+
+
+@pytest.fixture(scope="session", autouse=True)
+def setup_snap(snap_name):
+    """Install the package to the system and cleanup afterwards.
+
+    Note: an environment variable TEST_SNAP is needed to install the snap.
+    """
+    test_snap = os.environ.get("TEST_SNAP", None)
+    if test_snap:
+        logging.info("Installing %s snap package...", test_snap)
+        assert os.path.isfile(test_snap)
+        assert check_call(f"sudo snap install --dangerous {test_snap}".split()) == 0  # noqa
+        assert check_call(f"sudo snap start {snap_name}".split()) == 0
+    else:
+        logging.error(
+            "Could not find %s snap package for testing. Needs to build it first.",
+            snap_name,
+        )
+
+    down = 1
+    stime = time.time()
+    while time.time() - stime < SETUP_TIMEOUT and down:
+        try:
+            down = check_call("curl http://localhost:10000".split())
+        except Exception:
+            time.sleep(0.5)
+    assert not down, "Snap is not up."
+
+    yield test_snap
+
+    if test_snap:
+        logging.info("Removing %s snap package...", snap_name)
+        check_call(f"sudo snap remove {snap_name}".split())
diff --git a/tests/functional/requirements.txt b/tests/functional/requirements.txt
new file mode 100644
index 0000000..e079f8a
--- /dev/null
+++ b/tests/functional/requirements.txt
@@ -0,0 +1 @@
+pytest
diff --git a/tests/functional/test_snap.py b/tests/functional/test_snap.py
new file mode 100644
index 0000000..ed58309
--- /dev/null
+++ b/tests/functional/test_snap.py
@@ -0,0 +1,41 @@
+#!/usr/bin/python3
+"""Test exporter snap."""
+import os
+import re
+from subprocess import run
+
+SNAP_NAME = "prometheus-hardware-exporter"
+
+
+def test_default_config_installed(snap_config):
+    """Check if the snap default config exists."""
+    assert os.path.exists(snap_config)
+
+
+def test_snap_active(snap_name):
+    """Check if the snap is in active state."""
+    result = run(
+        f"systemctl is-active snap.{snap_name}.{snap_name}.service",
+        shell=True,
+        capture_output=True,
+    )
+    assert result.returncode == 0
+    assert result.stdout.decode().strip() == "active"
+
+
+def test_exporter_http_server():
+    """Check if http server is running."""
+    result = run("curl http://localhost:10000", shell=True, capture_output=True)
+    assert result.returncode == 0
+
+
+def test_exporter_metrics_created(available_metric_names):
+    """Check if hardware related metric is created."""
+    result = run("curl http://localhost:10000", shell=True, capture_output=True)
+    assert result.returncode == 0
+
+    output = result.stdout.decode().strip()
+    for metric_name in available_metric_names:
+        pattern = metric_name
+        match = re.search(pattern, output).group()
+        assert match is not None
diff --git a/tests/unit/requirements.txt b/tests/unit/requirements.txt
new file mode 100644
index 0000000..e079f8a
--- /dev/null
+++ b/tests/unit/requirements.txt
@@ -0,0 +1 @@
+pytest
diff --git a/tests/unit/test_cli.py b/tests/unit/test_cli.py
new file mode 100644
index 0000000..d94daab
--- /dev/null
+++ b/tests/unit/test_cli.py
@@ -0,0 +1,32 @@
+from unittest.mock import Mock, patch
+
+from prometheus_hardware_exporter import __main__
+from prometheus_hardware_exporter.__main__ import main, parse_command_line
+
+
+class TestCli:
+    """Cli test class."""
+
+    @patch("argparse.ArgumentParser")
+    def test_parse_argument(self, mock_argument_parser):
+        parse_command_line()
+        mock_argument_parser.assert_called_once()
+
+    @patch.object(__main__, "parse_command_line")
+    @patch.object(__main__, "Exporter")
+    @patch.object(__main__, "Config")
+    @patch("logging.getLevelName")
+    def test_cli_main(
+        self,
+        mock_get_level_name,
+        mock_config,
+        mock_exporter,
+        mock_main_parse_command_line,
+    ):
+        """Test main function in cli."""
+        mock_main_parse_command_line.return_value = Mock()
+        mock_get_level_name.return_value = "DEBUG"
+        main()
+        mock_main_parse_command_line.assert_called_once()
+        mock_config.load_config.assert_called_once()
+        mock_exporter.assert_called_once()
diff --git a/tests/unit/test_collector.py b/tests/unit/test_collector.py
new file mode 100644
index 0000000..047c87e
--- /dev/null
+++ b/tests/unit/test_collector.py
@@ -0,0 +1,48 @@
+import unittest
+from unittest.mock import Mock
+
+from prometheus_hardware_exporter.collector import MegaRAIDCollector
+
+
+class TestCustomCollector(unittest.TestCase):
+    """Custom test class."""
+
+    @classmethod
+    def setUpClass(cls):
+        cls.mock_config = Mock()
+
+    def test_00_mega_raid_collector_not_installed(self):
+        """Test mega raid collector when storcli is not installed."""
+        mega_raid_collector = MegaRAIDCollector(self.mock_config)
+        payloads = mega_raid_collector.collect()
+
+        self.assertEqual(len(list(payloads)), 1)
+
+    def test_01_mega_raid_collector_installed_and_okay(self):
+        """Test mega raid collector can fetch correct number of metrics."""
+        mega_raid_collector = MegaRAIDCollector(self.mock_config)
+        mega_raid_collector.storcli = Mock()
+
+        mock_controller_payload = {"count": 1, "hostname": "kongfu"}
+        mock_virtual_drives_payload = {
+            "0": [
+                {
+                    "DG": 0,
+                    "VD": 239,
+                    "state": "Optl",
+                    "cache": "NRWTD",
+                }
+            ],
+        }
+        mega_raid_collector.storcli.get_controllers.return_value = mock_controller_payload, False
+        mega_raid_collector.storcli.get_all_virtual_drives.return_value = (
+            mock_virtual_drives_payload,
+            False,
+        )
+
+        payloads = mega_raid_collector.collect()
+
+        available_metrics = [spec.name for spec in mega_raid_collector.specifications]
+        self.assertEqual(len(list(payloads)), len(available_metrics))
+        for payload in payloads:
+            self.assertIn(payload.name, available_metrics)
diff --git a/tests/unit/test_config.py b/tests/unit/test_config.py
new file mode 100644
index 0000000..6c4784b
--- /dev/null
+++ b/tests/unit/test_config.py
@@ -0,0 +1,48 @@
+import unittest
+from unittest.mock import patch
+
+import pytest
+
+from prometheus_hardware_exporter.__main__ import Config
+
+
+class TestConfig(unittest.TestCase):
+    """Config test class."""
+
+    def setUp(self):
+        self.patch_open_file = patch("builtins.open")
+        self.patch_os_path_exists = patch("os.path.exists", return_value=True)
+        self.patch_open_file.start()
+        self.patch_os_path_exists.start()
+
+    def tearDown(self):
+        self.patch_open_file.stop()
+        self.patch_os_path_exists.stop()
+
+    @patch("prometheus_hardware_exporter.config.safe_load")
+    def test_valid_config(self, mock_safe_load):
+        """Test valid config."""
+        mock_safe_load.return_value = {
+            "port": 10000,
+            "level": "INFO",
+        }
+        config = Config.load_config()
+        assert config.port == 10000
+        assert config.level == "INFO"
+
+    @patch("prometheus_hardware_exporter.config.safe_load")
+    def test_invalid_config(self, mock_safe_load):
+        """Test invalid config."""
+        mock_safe_load.return_value = {
+            "port": -10000,
+            "level": "RANDOM",
+        }
+        with pytest.raises(ValueError):
+            Config.load_config()
+
+    def test_missing_config(self):
+        """Test missing config."""
+        self.patch_open_file.stop()
+        self.patch_os_path_exists.stop()
+        with pytest.raises(ValueError):
+            Config.load_config("random")
diff --git a/tests/unit/test_core.py b/tests/unit/test_core.py
new file mode 100644
index 0000000..ba08e0c
--- /dev/null
+++ b/tests/unit/test_core.py
@@ -0,0 +1,32 @@
+import unittest
+from unittest.mock import Mock, patch
+
+import pytest
+
+from prometheus_hardware_exporter.core import BlockingCollector, Payload, Specification
+
+
+class TestBlockingCollector(unittest.TestCase):
+    """BlockingCollector test class."""
+
+    def setUp(self):
+        self.mock_payloads = [Payload(name="abc", labels=[], value=0)]
+        self.mock_specifications = [
+            Specification(name="abc", documentation="", labels=[], metric_class=Mock())
+        ]
+
+    def test_cannot_init_collector_base(self):
+        """Test cannot initialize CollectorBase."""
+        with pytest.raises(TypeError):
+            BlockingCollector()
+
+    @patch.multiple(BlockingCollector, __abstractmethods__=set())
+    def test_sync_collector_class_collect(self):
+        """Test sync collector class's collect method."""
+        BlockingCollector.fetch = Mock(return_value=self.mock_payloads)
+        BlockingCollector.process = Mock(return_value=self.mock_payloads)
+        BlockingCollector.specifications = self.mock_specifications
+        self.test_subclass = BlockingCollector(Mock())
+        list(self.test_subclass.collect())  # need list() because it's a generator
+        self.test_subclass.fetch.assert_called()
+        self.test_subclass.process.assert_called()
diff --git a/tests/unit/test_exporter.py b/tests/unit/test_exporter.py
new file mode 100644
index 0000000..b426013
--- /dev/null
+++ b/tests/unit/test_exporter.py
@@ -0,0 +1,20 @@
+from unittest.mock import Mock, patch
+
+from prometheus_hardware_exporter import exporter
+from prometheus_hardware_exporter.exporter import Exporter
+
+
+class TestExporter:
+    """Exporter test class."""
+
+    @patch.object(exporter, "threading")
+    @patch.object(exporter, "REGISTRY")
+    @patch.object(exporter, "make_server")
+    def test_exporter(self, mock_make_server, mock_registry, mock_threading):
+        exporter = Exporter(10000)
+        exporter.register(Mock())
+        exporter.run(daemon=True)
+
+        mock_make_server.assert_called_once()
+        mock_registry.register.assert_called_once()
+        mock_threading.Thread.assert_called_once()
diff --git a/tests/unit/test_resources/cx_vall_show_all.txt b/tests/unit/test_resources/cx_vall_show_all.txt
new file mode 100644
index 0000000..89bd4f7
--- /dev/null
+++ b/tests/unit/test_resources/cx_vall_show_all.txt
@@ -0,0 +1,84 @@
+{
+"Controllers":[
+{
+	"Command Status" : {
+		"CLI Version" : "007.2408.0000.0000 Nov 15, 2022",
+		"Operating system" : "Linux 5.15.0-72-generic",
+		"Controller" : 0,
+		"Status" : "Success",
+		"Description" : "None"
+	},
+	"Response Data" : {
+		"/c0/v239" : [
+			{
+				"DG/VD" : "0/239",
+				"TYPE" : "RAID1",
+				"State" : "Optl",
+				"Access" : "RW",
+				"Consist" : "Yes",
+				"Cache" : "NRWTD",
+				"Cac" : "-",
+				"sCC" : "ON",
+				"Size" : "744.687 GiB",
+				"Name" : "NVMe-RAID-1"
+			}
+		],
+		"PDs for VD 239" : [
+			{
+				"EID:Slt" : "251:1",
+				"DID" : 0,
+				"State" : "Onln",
+				"DG" : 0,
+				"Size" : "800.00 GB",
+				"Intf" : "NVMe",
+				"Med" : "SSD",
+				"SED" : "N",
+				"PI" : "N",
+				"SeSz" : "512B",
+				"Model" : "MZXLR800HBHQ-000H3                      ",
+				"Sp" : "U",
+				"Type" : "-"
+			},
+			{
+				"EID:Slt" : "251:2",
+				"DID" : 1,
+				"State" : "Onln",
+				"DG" : 0,
+				"Size" : "800.00 GB",
+				"Intf" : "NVMe",
+				"Med" : "SSD",
+				"SED" : "N",
+				"PI" : "N",
+				"SeSz" : "512B",
+				"Model" : "MZXLR800HBHQ-000H3                      ",
+				"Sp" : "U",
+				"Type" : "-"
+			}
+		],
+		"VD239 Properties" : {
+			"Strip Size" : "64 KB",
+			"Number of Blocks" : 1561722880,
+			"VD has Emulated Drive" : "No",
+			"Span Depth" : 1,
+			"Number of Drives Per Span" : 2,
+			"Write Cache(initial setting)" : "WriteThrough",
+			"Disk Cache Policy" : "Disk's Default",
+			"Write Cache Status" : "Disabled",
+			"Encryption" : "None",
+			"Data Integrity" : "None",
+			"Active Operations" : "None",
+			"Exposed to OS" : "Yes",
+			"OS Drive Name" : "/dev/sda",
+			"Creation Date" : "02-08-2022",
+			"Creation Time" : "01:29:12 PM",
+			"Emulation type" : "default",
+			"Cachebypass size" : "Cachebypass-64k",
+			"Cachebypass Mode" : "Cachebypass Intelligent",
+			"Is LD Ready for OS Requests" : "Yes",
+			"SCSI NAA Id" : "600062b2073a48402a7be3283fc1215e",
+			"Unmap Enabled" : "No"
+		}
+	}
+}
+]
+}
diff --git a/tests/unit/test_resources/show_all.txt b/tests/unit/test_resources/show_all.txt
new file mode 100644
index 0000000..4e9b6af
--- /dev/null
+++ b/tests/unit/test_resources/show_all.txt
@@ -0,0 +1,57 @@
+{
+"Controllers":[
+{
+	"Command Status" : {
+		"CLI Version" : "007.2408.0000.0000 Nov 15, 2022",
+		"Operating system" : "Linux 5.15.0-72-generic",
+		"Status Code" : 0,
+		"Status" : "Success",
+		"Description" : "None"
+	},
+	"Response Data" : {
+		"Number of Controllers" : 1,
+		"Host Name" : "kongfu",
+		"Operating System " : "Linux 5.15.0-72-generic",
+		"System Overview" : [
+			{
+				"Ctl" : 0,
+				"Model" : "HPEMR216i-aGen10+",
+				"Ports" : 16,
+				"PDs" : 2,
+				"DGs" : 1,
+				"DNOpt" : 0,
+				"VDs" : 1,
+				"VNOpt" : 0,
+				"BBU" : "N/A",
+				"sPR" : "On",
+				"DS" : "-",
+				"EHS" : "N",
+				"ASOs" : 2,
+				"Hlth" : "Opt"
+			}
+		],
+		"ASO" : [
+			{
+				"Ctl" : 0,
+				"Cl" : "X",
+				"SAS" : "U",
+				"MD" : "X",
+				"R6" : "X",
+				"WC" : "U",
+				"R5" : "X",
+				"SS" : "U",
+				"FP" : "U",
+				"Re" : "X",
+				"CR" : "X",
+				"RF" : "X",
+				"CO" : "X",
+				"CW" : "X",
+				"HA" : "X",
+				"SSHA" : "X"
+			}
+		]
+	}
+}
+]
+}
+
diff --git a/tests/unit/test_resources/show_ctrlcount.txt b/tests/unit/test_resources/show_ctrlcount.txt
new file mode 100644
index 0000000..ac3bd50
--- /dev/null
+++ b/tests/unit/test_resources/show_ctrlcount.txt
@@ -0,0 +1,16 @@
+{
+"Controllers":[
+{
+	"Command Status" : {
+		"CLI Version" : "007.2408.0000.0000 Nov 15, 2022",
+		"Operating system" : "Linux 5.15.0-72-generic",
+		"Status Code" : 0,
+		"Status" : "Success",
+		"Description" : "None"
+	},
+	"Response Data" : {
+		"Controller Count" : 1
+	}
+}
+]
+}
diff --git a/tests/unit/test_storcli.py b/tests/unit/test_storcli.py
new file mode 100644
index 0000000..59a2d32
--- /dev/null
+++ b/tests/unit/test_storcli.py
@@ -0,0 +1,83 @@
+import unittest
+from unittest.mock import patch
+
+from prometheus_hardware_exporter.collectors.storcli import StorCLI
+from prometheus_hardware_exporter.utils import Command
+
+SHOW_CTRLCOUNT = "tests/unit/test_resources/show_ctrlcount.txt"
+SHOW_ALL = "tests/unit/test_resources/show_all.txt"
+CX_VALL_SHOW_ALL = "tests/unit/test_resources/cx_vall_show_all.txt"
+
+
+class TestStorCLI(unittest.TestCase):
+    """Test StorCLI class."""
+
+    @patch.object(Command, "__call__")
+    def test_00_get_controllers_okay(self, mock_call):
+        with open(SHOW_ALL, "r") as content:
+            mock_call.return_value = content.read(), False
+            storcli = StorCLI()
+            payload, _ = storcli.get_controllers()
+            self.assertEqual(payload, {"count": 1, "hostname": "kongfu"})
+
+    @patch.object(Command, "__call__")
+    def test_01_get_controllers_failed(self, mock_call):
+        mock_call.return_value = "", False
+        storcli = StorCLI()
+        payload, _ = storcli.get_controllers()
+        self.assertIsNone(payload)
+
+    @patch.object(StorCLI, "_get_controller_ids")
+    @patch.object(Command, "__call__")
+    def test_10_get_all_virtual_drives_okay(self, mock_call, mock__get_controller_ids):
+        with open(CX_VALL_SHOW_ALL, "r") as content:
+            mock_call.return_value = content.read(), False
+            mock__get_controller_ids.return_value = [1], False
+            storcli = StorCLI()
+            payload, _ = storcli.get_all_virtual_drives()
+            self.assertEqual(
+                payload, {1: [{"DG": "0", "VD": "239", "state": "Optl", "cache": "NRWTD"}]}
+            )
+
+    @patch.object(StorCLI, "_get_all_virtual_drives")
+    @patch.object(StorCLI, "_get_controller_ids")
+    @patch.object(Command, "__call__")
+    def test_11_get_all_virtual_drives_failed(
+        self, mock_call, mock__get_controller_ids, mock__get_all_virtual_drives
+    ):
+        with open(CX_VALL_SHOW_ALL, "r") as content:
+            mock_call.return_value = content.read(), False
+            mock__get_controller_ids.return_value = [1], False
+            mock__get_all_virtual_drives.return_value = None, True
+            storcli = StorCLI()
+            payload, _ = storcli.get_all_virtual_drives()
+            self.assertIsNone(payload)
+
+    @patch.object(Command, "__call__")
+    def test_20__get_controller_id_okay(self, mock_call):
+        with open(SHOW_CTRLCOUNT, "r") as content:
+            mock_call.return_value = content.read(), False
+            storcli = StorCLI()
+            payload, _ = storcli._get_controller_ids()
+            self.assertEqual(payload, [0])
+
+    @patch.object(Command, "__call__")
+    def test_21__get_controller_id_failed(self, mock_call):
+        mock_call.return_value = "", False
+        storcli = StorCLI()
+        payload, _ = storcli._get_controller_ids()
+        self.assertIsNone(payload)
+
+    @patch.object(Command, "__call__")
+    def test_30__get_all_virtual_drives_failed(self, mock_call):
+        mock_call.return_value = "", False
+        storcli = StorCLI()
+        payload, _ = storcli._get_all_virtual_drives(0)
+        self.assertIsNone(payload)
+
+    @patch.object(Command, "__call__")
+    def test_31__get_all_virtual_drives_failed(self, mock_call):
+        mock_call.return_value = "", True
+        storcli = StorCLI()
+        payload, _ = storcli._get_all_virtual_drives(0)
+        self.assertIsNone(payload)
diff --git a/tests/unit/test_utils.py b/tests/unit/test_utils.py
new file mode 100644
index 0000000..56a6f6b
--- /dev/null
+++ b/tests/unit/test_utils.py
@@ -0,0 +1,34 @@
+import unittest
+from unittest.mock import patch
+
+from prometheus_hardware_exporter.utils import Command
+
+
+class TestCommand(unittest.TestCase):
+    """Test Command class."""
+
+    @patch.object(Command, "check_output")
+    def test_check_installed(self, mock_check_output):
+        mock_check_output.return_value = True, False
+        command = Command()
+        self.assertTrue(command.check_installed())
+
+    @patch.object(Command, "check_installed")
+    @patch.object(Command, "check_output")
+    def test_call_okay(self, mock_check_output, mock_check_installed):
+        mock_check_installed.return_value = True, False
+        mock_check_output.return_value = True, False
+        command = Command()
+        result, error = command()
+        self.assertFalse(error)
+
+    @patch.object(Command, "check_installed")
+    @patch.object(Command, "check_output")
+    def test_call_failed(self, mock_check_output, mock_check_installed):
+        mock_check_installed.return_value = True, False
+        mock_check_output.return_value = False, True
+        command = Command()
+        result, error = command()
+        print(result, error)
+        self.assertTrue(error)
+        self.assertIsNone(result)
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..b54137a
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,74 @@
+# This is a template `tox.ini` file for snaps
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual snap repos. https://launchpad.net/bootstack-charms-spec
+
+[tox]
+skipsdist=True
+envlist = lint, unit, func
+skip_missing_interpreters = True
+
+[testenv]
+basepython = python3
+setenv = PYTHONPATH={toxinidir}
+
+[testenv:dev-environment]
+envdir = {toxinidir}/.venv
+deps =
+    pre-commit
+    {[testenv:lint]deps}
+    {[testenv:unit]deps}
+    {[testenv:func]deps}
+commands =
+    pre-commit install
+
+[testenv:pre-commit]
+envdir = {[testenv:dev-environment]envdir}
+deps = {[testenv:dev-environment]deps}  # ensure that dev-environment is installed
+commands = pre-commit run --all-files
+
+[testenv:lint]
+commands =
+    pflake8
+    pylint --recursive=y .
+    mypy --install-types --non-interactive .
+    black --check --diff --color .
+    isort --check --diff --color .
+deps =
+    black
+    flake8
+    pyproject-flake8
+    flake8-docstrings
+    pep8-naming
+    flake8-colors
+    colorama
+    isort
+    pylint
+    mypy
+    {[testenv:unit]deps}
+    {[testenv:func]deps}
+
+[testenv:reformat]
+envdir = {toxworkdir}/lint
+deps = {[testenv:lint]deps}
+commands =
+    black .
+    isort .
+
+[testenv:unit]
+deps =
+    -r {toxinidir}/requirements.txt
+    -r {toxinidir}/tests/unit/requirements.txt
+    pytest
+    pytest-cov
+commands = pytest {toxinidir}/tests/unit \
+    {posargs:-v --cov --cov-report=term-missing --cov-report=html --cov-report=xml}
+
+[testenv:func]
+deps =
+    -r {toxinidir}/requirements.txt
+    -r {toxinidir}/tests/functional/requirements.txt
+    pytest
+passenv =
+    TEST_*
+commands =
+    pytest {toxinidir}/tests/functional {posargs:-v}