diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..c852f1c
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,8 @@
+.coverage
+.tox/
+htmlcov/
+.mypy_cache
+*egg-info
+**/__pycache__/
+*.py[cod]
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b803309
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,77 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# vim
+*.swp
+
+# pycharm
+.idea
+
+# testing
+config.json
+server_config.json
+script_config.json
+work_dir
+artifact_dir
+build-tools
+
+beetmoverscript/test/test_artifact_dir/
+
+# misc
+.DS_Store
diff --git a/.taskcluster.yml b/.taskcluster.yml
new file mode 100644
index 0000000..511aaaa
--- /dev/null
+++ b/.taskcluster.yml
@@ -0,0 +1,128 @@
+version: 1
+policy:
+  pullRequests: public
+tasks:
+  $let:
+    head_rev:
+      $if: 'tasks_for == "github-pull-request"'
+      then: ${event.pull_request.head.sha}
+      else:
+        $if: 'tasks_for == "github-push"'
+        then: ${event.after}
+        else: ${event.release.tag_name}
+
+    repository:
+      $if: 'tasks_for == "github-pull-request"'
+      then: ${event.pull_request.head.repo.html_url}
+      else: ${event.repository.html_url}
+
+    owner: ${event.sender.login}@users.noreply.github.com
+
+    docker_tag:
+      $if: 'tasks_for == "github-pull-request"'
+      then: pull-request
+      else:
+        $if: 'tasks_for == "github-push"'
+        then:
+          $if: 'event.ref[:10] == "refs/tags/"'
+          then: ${event.ref[10:]} # strip "refs/tags/"
+          else: ${event.ref[11:]} # strip "refs/heads/"
+        else: "v${event.release.tag_name}" # prefix the version with "v"
+
+  in:
+    - taskId: '${as_slugid("py37")}'
+      provisionerId: aws-provisioner-v1
+      workerType: github-worker
+      created: {$fromNow: ''}
+      deadline: {$fromNow: '4 hours'}
+      payload:
+        maxRunTime: 3600
+        image: python:3.7
+        command:
+          - sh
+          - -lxce
+          - >-
+            git clone ${repository} /src &&
+            cd /src &&
+            git config advice.detachedHead false &&
+            git checkout ${head_rev} &&
+            pip install tox &&
+            tox
+      metadata:
+        name: tox py37 (${docker_tag})
+        description: code linting & unit tests on py37 (${docker_tag})
+        owner: ${owner}
+        source: ${repository}/raw/${head_rev}/.taskcluster.yml
+
+    - taskId: '${as_slugid("docker_build")}'
+      dependencies:
+        - '${as_slugid("py37")}'
+      provisionerId: aws-provisioner-v1
+      workerType: github-worker
+      created: {$fromNow: ''}
+      deadline: {$fromNow: '4 hours'}
+      payload:
+        features:
+          dind: true
+        maxRunTime: 3600
+        image: mozillareleases/python-test-runner
+        command:
+          - bash
+          - -ce
+          - >-
+            git clone ${repository} /src &&
+            cd /src &&
+            git config advice.detachedHead false &&
+            git checkout ${head_rev} &&
+            docker build -f Dockerfile -t mozilla/releng-k8s-autoscale:${docker_tag} . &&
+            docker save mozilla/releng-k8s-autoscale:${docker_tag} > /tmp/image.tar
+        artifacts:
+          public/image.tar:
+            expires: {$fromNow: '2 weeks'}
+            path: /tmp/image.tar
+            type: file
+      metadata:
+        name: docker build (${docker_tag})
+        description: build latest docker image (${docker_tag})
+        owner: ${owner}
+        source: ${repository}/raw/${head_rev}/.taskcluster.yml
+
+    - $if: 'tasks_for != "github-pull-request"'
+      then:
+        $if: 'repository == "https://github.com/mozilla-releng/k8s-autoscale"'
+        then:
+          taskId: '${as_slugid("docker_push")}'
+          dependencies:
+            - '${as_slugid("docker_build")}'
+          provisionerId: aws-provisioner-v1
+          workerType: github-worker
+          created: {$fromNow: ''}
+          deadline: {$fromNow: '4 hours'}
+          payload:
+            features:
+              # Needed for access to secret
+              taskclusterProxy: true
+              dind: true
+            maxRunTime: 3600
+            image: mozillareleases/python-test-runner
+            command:
+              - bash
+              - -ce
+              - >-
+                git clone ${repository} /src &&
+                cd /src &&
+                git config advice.detachedHead false &&
+                git checkout ${head_rev} &&
+                IMAGE_TASK_ID=${as_slugid("docker_build")}
+                SECRET_URL=http://taskcluster/secrets/v1/secret/project/releng/k8s-autoscale/deploy
+                DOCKERHUB_EMAIL=release+dockerhub+services@mozilla.com
+                DOCKERHUB_USER=mozillarelengservices
+                TAG=mozilla/releng-k8s-autoscale:${docker_tag}
+                ./docker.d/push_image.sh
+          scopes:
+            - secrets:get:project/releng/k8s-autoscale/deploy
+          metadata:
+            name: docker push (${docker_tag})
+            description: push docker image (${docker_tag})
+            owner: ${owner}
+            source: ${repository}/raw/${head_rev}/.taskcluster.yml
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..498baa3
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,15 @@
+# Community Participation Guidelines
+
+This repository is governed by Mozilla's code of conduct and etiquette guidelines. 
+For more details, please read the
+[Mozilla Community Participation Guidelines](https://www.mozilla.org/about/governance/policies/participation/). 
+
+## How to Report
+For more information on how to report violations of the Community Participation Guidelines, please read our '[How to Report](https://www.mozilla.org/about/governance/policies/participation/reporting/)' page.
+
+<!--
+## Project Specific Etiquette
+
+In some cases, there will be additional project etiquette i.e.: (https://bugzilla.mozilla.org/page.cgi?id=etiquette.html).
+Please update for your project.
+-->
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..1098d02
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,20 @@
+FROM python:3.7
+
+RUN groupadd --gid 10001 app && \
+    useradd -g app --uid 10001 --shell /usr/sbin/nologin --create-home --home-dir /app app
+
+USER app
+WORKDIR /app
+
+COPY . /app
+# generate /app/version.json according to https://github.com/mozilla-services/Dockerflow/blob/master/docs/version_object.md
+RUN ./docker.d/generate_version_json.sh
+
+RUN python -m venv /app
+RUN ./bin/pip install -r requirements/base.txt
+RUN ./bin/pip install -e .
+
+COPY docker.d/healthcheck /bin/healthcheck
+COPY docker.d/init.sh /app/bin/init.sh
+
+CMD ["/app/bin/init.sh"]
diff --git a/HISTORY.rst b/HISTORY.rst
new file mode 100644
index 0000000..68d4d93
--- /dev/null
+++ b/HISTORY.rst
@@ -0,0 +1,8 @@
+=======
+History
+=======
+
+0.1.0 (2019-05-07)
+------------------
+
+* First release
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..39b9813
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,27 @@
+include CONTRIBUTING.rst
+include HISTORY.rst
+include LICENSE
+include README.rst
+include CODE_OF_CONDUCT.md
+include tox.ini
+include config-example.yaml
+include version.txt
+
+recursive-include requirements *.in
+recursive-include requirements *.txt
+recursive-include tests *
+recursive-exclude * __pycache__
+recursive-exclude * *.py[co]
+
+recursive-include docs *.rst conf.py
+
+# added by check_manifest.py
+include *.txt
+
+# added by check_manifest.py
+include Dockerfile
+recursive-include configs *.yml
+recursive-include docker.d *
+
+exclude .dockerignore
+exclude .taskcluster.yml
diff --git a/README.md b/README.md
deleted file mode 100644
index 5e3826c..0000000
--- a/README.md
+++ /dev/null
@@ -1 +0,0 @@
-# k8s-autoscale
diff --git a/README.rst b/README.rst
new file mode 100644
index 0000000..e7f211f
--- /dev/null
+++ b/README.rst
@@ -0,0 +1,16 @@
+====================
+Kubernetes Autoscale
+====================
+
+Autoscale scriptworkers in Kubernetes
+
+* Free software: MPL2
+* Documentation: https://k8s-autoscale.readthedocs.io.
+
+Features
+--------
+
+* TODO
+
+Credits
+-------
diff --git a/config-example.yaml b/config-example.yaml
new file mode 100644
index 0000000..e6e48fc
--- /dev/null
+++ b/config-example.yaml
@@ -0,0 +1,18 @@
+worker_types:
+  - name: shipitscript-v1
+    provisioner: scriptworker-prov-v1
+    poll_interval: 180
+    deployment_namespace: default
+    deployment_name: nginx-1
+    # remove kube_config and kube_connfig_context to use in-cluster auth
+    kube_connfig: ~/.kube/config
+    kube_connfig_context: xx
+    autoscale:
+      algorithm: sla
+      args:
+        max_replicas: 20
+        avg_task_duration: 60
+        boot_time: 60
+        tolerance_seconds: 300
+        # cover 100% of pending
+        capacity_ratio: 1.0
diff --git a/configs/production-beetmover.yml b/configs/production-beetmover.yml
new file mode 100644
index 0000000..0dcffc9
--- /dev/null
+++ b/configs/production-beetmover.yml
@@ -0,0 +1,15 @@
+worker_types:
+  - name: beetmoverworker-v1
+    provisioner: scriptworker-prov-v1
+    poll_interval: 180
+    deployment_namespace: TODO
+    deployment_name: TODO
+    autoscale:
+      algorithm: sla
+      args:
+        max_replicas: 20
+        avg_task_duration: 60
+        boot_time: 60
+        tolerance_seconds: 300
+        # cover 100% of pending
+        capacity_ratio: 1.0
diff --git a/configs/stage-beetmover.yml b/configs/stage-beetmover.yml
new file mode 100644
index 0000000..6d51e34
--- /dev/null
+++ b/configs/stage-beetmover.yml
@@ -0,0 +1,15 @@
+worker_types:
+  - name: beetmoverworker-dev
+    provisioner: scriptworker-prov-v1
+    poll_interval: 180
+    deployment_namespace: TODO
+    deployment_name: TODO
+    autoscale:
+      algorithm: sla
+      args:
+        max_replicas: 2
+        avg_task_duration: 60
+        boot_time: 60
+        tolerance_seconds: 300
+        # cover 100% of pending
+        capacity_ratio: 1.0
diff --git a/docker.d/generate_version_json.sh b/docker.d/generate_version_json.sh
new file mode 100755
index 0000000..c993fc2
--- /dev/null
+++ b/docker.d/generate_version_json.sh
@@ -0,0 +1,14 @@
+#/bin/bash
+
+set -xe
+commit=$(git rev-parse HEAD)
+version=$(cat version.txt)
+
+cat > version.json <<EOF
+{
+    "commit": "${commit}",
+    "version": "${version}",
+    "source": "https://github.com/mozilla-releng/k8s-autoscale",
+    "build": "https://github.com/mozilla-releng/k8s-autoscale/commit/${commit}"
+}
+EOF
diff --git a/docker.d/healthcheck b/docker.d/healthcheck
new file mode 100755
index 0000000..71902c6
--- /dev/null
+++ b/docker.d/healthcheck
@@ -0,0 +1,2 @@
+#!/bin/bash
+pgrep k8s_autoscale
diff --git a/docker.d/init.sh b/docker.d/init.sh
new file mode 100755
index 0000000..e1b503a
--- /dev/null
+++ b/docker.d/init.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+test $CONFIG
+
+exec /app/bin/k8s_autoscale --config /app/configs/$CONFIG
diff --git a/docker.d/push_image.sh b/docker.d/push_image.sh
new file mode 100755
index 0000000..6372587
--- /dev/null
+++ b/docker.d/push_image.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+set -e
+test $IMAGE_TASK_ID
+test $SECRET_URL
+test $DOCKERHUB_EMAIL
+test $DOCKERHUB_USER
+test $TAG
+
+dockerhub_password=$(curl $SECRET_URL | python -c 'import json, sys; a = json.load(sys.stdin); print a["secret"]["docker"]["password"]')
+
+WORKDIR=$(mktemp -d)
+cd $WORKDIR
+
+curl -L -o image.tar https://queue.taskcluster.net/v1/task/$IMAGE_TASK_ID/artifacts/public/image.tar
+docker load < image.tar
+docker login -e $DOCKERHUB_EMAIL -u $DOCKERHUB_USER -p $dockerhub_password
+docker push $TAG
diff --git a/k8s_autoscale/__init__.py b/k8s_autoscale/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/k8s_autoscale/cli.py b/k8s_autoscale/cli.py
new file mode 100644
index 0000000..e67b496
--- /dev/null
+++ b/k8s_autoscale/cli.py
@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+
+"""Console script for kubernetes_autoscaler_for_taskcluster_scriptworkers."""
+import sys
+
+import click
+
+from k8s_autoscale.main import autoscale
+
+
+@click.command()
+@click.option(
+    "--config", default="config.yaml", help="autoscale config", type=click.File()
+)
+def main(config):
+    """Console script for kubernetes_autoscaler_for_taskcluster_scriptworkers."""
+    autoscale(config)
diff --git a/k8s_autoscale/logging.py b/k8s_autoscale/logging.py
new file mode 100644
index 0000000..36bcdca
--- /dev/null
+++ b/k8s_autoscale/logging.py
@@ -0,0 +1,5 @@
+import structlog
+
+
+def get_logger(*args, **kwargs):
+    return structlog.get_logger(*args, **kwargs)
diff --git a/k8s_autoscale/main.py b/k8s_autoscale/main.py
new file mode 100644
index 0000000..5f87aeb
--- /dev/null
+++ b/k8s_autoscale/main.py
@@ -0,0 +1,115 @@
+import os.path
+
+import kubernetes
+import yaml
+from k8s_autoscale.logging import get_logger
+from k8s_autoscale.sla import get_new_worker_count
+from taskcluster import Queue
+
+logger = get_logger()
+q = Queue({"rootUrl": "https://taskcluster.net"})
+
+
+def autoscale(config):
+    config = yaml.safe_load(config)
+    for worker_type in config["worker_types"]:
+        # TODO: run in parallel
+        handle_worker_type(worker_type)
+
+
+def get_api(kube_config, kube_config_context):
+    if kube_config and kube_config_context:
+        logger.info("Using kube config")
+        api_client = kubernetes.config.new_client_from_config(
+            config_file=os.path.expanduser(kube_config), context=kube_config_context
+        )
+    else:
+        logger.info("Using in-cluster config")
+        api_client = kubernetes.config.load_incluster_config()
+    api = kubernetes.client.AppsV1beta2Api(api_client=api_client)
+    return api
+
+
+def get_deployment_status(api, deployment_namespace, deployment_name):
+    return api.read_namespaced_deployment(
+        name=deployment_name, namespace=deployment_namespace
+    ).status
+
+
+def get_running(api, deployment_namespace, deployment_name):
+    return (
+        get_deployment_status(api, deployment_namespace, deployment_name).ready_replicas
+        or 0
+    )
+
+
+def get_booting(api, deployment_namespace, deployment_name):
+    return (
+        get_deployment_status(
+            api, deployment_namespace, deployment_name
+        ).unavailable_replicas
+        or 0
+    )
+
+
+def adjust_scale(api, running, adjustment, deployment_namespace, deployment_name):
+    # "add" works as "replace" in case we have more than 0 replicas.
+    # "replace" fails in case we don't have any replicas running
+    patch = [{"op": "add", "path": "/spec/replicas", "value": running + adjustment}]
+    logger.debug("PATCH object", patch=patch)
+    api.patch_namespaced_deployment_scale(
+        name=deployment_name, namespace=deployment_namespace, body=patch
+    )
+
+
+def handle_worker_type(cfg):
+    log = logger.bind(worker_type=cfg["name"], provisioner=cfg["provisioner"])
+    api = get_api(cfg.get("kube_connfig"), cfg.get("kube_connfig_context"))
+    log.info("Handling worker type. Getting the number of running replicas...")
+    running = get_running(
+        api=api,
+        deployment_namespace=cfg["deployment_namespace"],
+        deployment_name=cfg["deployment_name"],
+    )
+    log.bind(running=running)
+    log.info("Getting the number of replicas in progress...")
+    booting = get_booting(
+        api=api,
+        deployment_namespace=cfg["deployment_namespace"],
+        deployment_name=cfg["deployment_name"],
+    )
+    log.bind(booting=booting)
+    log.info("Calculating capacity")
+    capacity = cfg["autoscale"]["args"]["max_replicas"] - (running + booting)
+    log.bind(capacity=capacity)
+    log.info("Checking capacity")
+    if capacity <= 0:
+        log.info("Maximum capacity reached")
+        return
+
+    log.info("Checking pending")
+    pending = q.pendingTasks(cfg["provisioner"], cfg["name"])["pendingTasks"]
+    log.bind(pending=pending)
+    log.info("Calculated desired replica count")
+    desired = get_new_worker_count(pending, running, booting, cfg["autoscale"]["args"])
+    log.bind(desired=desired)
+    if desired == 0:
+        log.info("Zero replicas needed")
+        return
+    if desired < 0:
+        log.info(f"Need to remove {abs(desired)} of {running}")
+        adjust_scale(
+            api, running, desired, cfg["deployment_namespace"], cfg["deployment_name"]
+        )
+    else:
+        adjustment = min([capacity, desired])
+        log.bind(adjustment=adjustment)
+        log.info(f"Need to increase capacity from {running} running by {adjustment}")
+        adjust_scale(
+            api,
+            running,
+            adjustment,
+            cfg["deployment_namespace"],
+            cfg["deployment_name"],
+        )
+    log.info("Done handling worker type")
diff --git a/k8s_autoscale/sla.py b/k8s_autoscale/sla.py
new file mode 100644
index 0000000..5ff264f
--- /dev/null
+++ b/k8s_autoscale/sla.py
@@ -0,0 +1,33 @@
+import math
+
+
+def get_new_worker_count(pending, running, booting, args):
+    # TODO: verify all the args
+    assert args["sla_seconds"] > args["avg_task_duration"]
+    # In case we don't want to cover all the pending tasks
+    pending = int(math.ceil(pending * args["capacity_ratio"]))
+    # Scale down only when we have no pending tasks
+    if pending == 0:
+        return -(running + booting)
+    # How many tasks a replica can process within our tolerance period
+    new_tasks_per_replica = math.floor(
+        (args["sla_seconds"] - args["boot_time"]) / args["avg_task_duration"]
+    )
+    # how many tasks can be covered by the running replicas, assuming they are
+    # busy and can only take new tasks after they are done with the current one
+    running_tasks_per_replica = (
+        math.floor(args["sla_seconds"] / args["avg_task_duration"]) - 1
+    )
+    # how many tasks the booting replicas can cover, assuming they will be
+    # available for new jobs as soon as they boot up
+    booting_tasks_per_replica = math.floor(
+        (args["sla_seconds"] - args["boot_time"]) / args["avg_task_duration"]
+    )
+    running_can_cover = running * running_tasks_per_replica
+    booting_can_cover = booting * booting_tasks_per_replica
+    still_pending = pending - (running_can_cover + booting_can_cover)
+    if still_pending > 0:
+        new_replicas_needed = math.ceil(still_pending / new_tasks_per_replica)
+        return min([new_replicas_needed, args["max_replicas"]])
+    else:
+        return 0
diff --git a/requirements/base.in b/requirements/base.in
new file mode 100644
index 0000000..337ba88
--- /dev/null
+++ b/requirements/base.in
@@ -0,0 +1,5 @@
+click
+kubernetes
+taskcluster
+pyyaml
+structlog
diff --git a/requirements/base.txt b/requirements/base.txt
new file mode 100644
index 0000000..81da9af
--- /dev/null
+++ b/requirements/base.txt
@@ -0,0 +1,181 @@
+# SHA1:133859141b0570bf860131c249f2098eda5c8f4c
+#
+# This file is autogenerated by pip-compile-multi
+# To update, run:
+#
+#    pip-compile-multi
+#
+aiohttp==3.5.4 \
+    --hash=sha256:00d198585474299c9c3b4f1d5de1a576cc230d562abc5e4a0e81d71a20a6ca55 \
+    --hash=sha256:0155af66de8c21b8dba4992aaeeabf55503caefae00067a3b1139f86d0ec50ed \
+    --hash=sha256:09654a9eca62d1bd6d64aa44db2498f60a5c1e0ac4750953fdd79d5c88955e10 \
+    --hash=sha256:199f1d106e2b44b6dacdf6f9245493c7d716b01d0b7fbe1959318ba4dc64d1f5 \
+    --hash=sha256:296f30dedc9f4b9e7a301e5cc963012264112d78a1d3094cd83ef148fdf33ca1 \
+    --hash=sha256:368ed312550bd663ce84dc4b032a962fcb3c7cae099dbbd48663afc305e3b939 \
+    --hash=sha256:40d7ea570b88db017c51392349cf99b7aefaaddd19d2c78368aeb0bddde9d390 \
+    --hash=sha256:629102a193162e37102c50713e2e31dc9a2fe7ac5e481da83e5bb3c0cee700aa \
+    --hash=sha256:6d5ec9b8948c3d957e75ea14d41e9330e1ac3fed24ec53766c780f82805140dc \
+    --hash=sha256:87331d1d6810214085a50749160196391a712a13336cd02ce1c3ea3d05bcf8d5 \
+    --hash=sha256:9a02a04bbe581c8605ac423ba3a74999ec9d8bce7ae37977a3d38680f5780b6d \
+    --hash=sha256:9c4c83f4fa1938377da32bc2d59379025ceeee8e24b89f72fcbccd8ca22dc9bf \
+    --hash=sha256:9cddaff94c0135ee627213ac6ca6d05724bfe6e7a356e5e09ec57bd3249510f6 \
+    --hash=sha256:a25237abf327530d9561ef751eef9511ab56fd9431023ca6f4803f1994104d72 \
+    --hash=sha256:a5cbd7157b0e383738b8e29d6e556fde8726823dae0e348952a61742b21aeb12 \
+    --hash=sha256:a97a516e02b726e089cffcde2eea0d3258450389bbac48cbe89e0f0b6e7b0366 \
+    --hash=sha256:acc89b29b5f4e2332d65cd1b7d10c609a75b88ef8925d487a611ca788432dfa4 \
+    --hash=sha256:b05bd85cc99b06740aad3629c2585bda7b83bd86e080b44ba47faf905fdf1300 \
+    --hash=sha256:c2bec436a2b5dafe5eaeb297c03711074d46b6eb236d002c13c42f25c4a8ce9d \
+    --hash=sha256:cc619d974c8c11fe84527e4b5e1c07238799a8c29ea1c1285149170524ba9303 \
+    --hash=sha256:d4392defd4648badaa42b3e101080ae3313e8f4787cb517efd3f5b8157eaefd6 \
+    --hash=sha256:e1c3c582ee11af7f63a34a46f0448fca58e59889396ffdae1f482085061a2889 \
+    # via taskcluster
+async-timeout==3.0.1 \
+    --hash=sha256:0c3c816a028d47f659d6ff5c745cb2acf1f966da1fe5c19c77a70282b25f4c5f \
+    --hash=sha256:4291ca197d287d274d0b6cb5d6f8f8f82d434ed288f962539ff18cc9012f9ea3 \
+    # via aiohttp, taskcluster
+attrs==19.1.0 \
+    --hash=sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79 \
+    --hash=sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399 \
+    # via aiohttp
+cachetools==3.1.0 \
+    --hash=sha256:219b7dc6024195b6f2bc3d3f884d1fef458745cd323b04165378622dcc823852 \
+    --hash=sha256:9efcc9fab3b49ab833475702b55edd5ae07af1af7a4c627678980b45e459c460 \
+    # via google-auth
+certifi==2019.3.9 \
+    --hash=sha256:59b7658e26ca9c7339e00f8f4636cdfe59d34fa37b9b04f6f9e9926b3cece1a5 \
+    --hash=sha256:b26104d6835d1f5e49452a26eb2ff87fe7090b89dfcaee5ea2212697e1e1d7ae \
+    # via kubernetes, requests
+chardet==3.0.4 \
+    --hash=sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae \
+    --hash=sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691 \
+    # via aiohttp, requests
+click==7.0 \
+    --hash=sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13 \
+    --hash=sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7
+google-auth==1.6.3 \
+    --hash=sha256:0f7c6a64927d34c1a474da92cfc59e552a5d3b940d3266606c6a28b72888b9e4 \
+    --hash=sha256:20705f6803fd2c4d1cc2dcb0df09d4dfcb9a7d51fd59e94a3a28231fd93119ed \
+    # via kubernetes
+idna==2.8 \
+    --hash=sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407 \
+    --hash=sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c \
+    # via requests, yarl
+kubernetes==9.0.0 \
+    --hash=sha256:a8b0aed55ba946faea660712595a52ae53a8854df773d96f47a63fa0c9d4e3bf \
+    --hash=sha256:f56137a298cb1453dd908b49dd4169347287c971e8cabd11b32f27570fec314c
+mohawk==1.0.0 \
+    --hash=sha256:aa57e6626a6ea323ab714779f23734de1d1feca8cb6fc00b65e65ce115c1696a \
+    --hash=sha256:fca4e34d8f5492f1c33141c98b96e168a089e5692ce65fb747e4bb613f5fe552 \
+    # via taskcluster
+multidict==4.5.2 \
+    --hash=sha256:024b8129695a952ebd93373e45b5d341dbb87c17ce49637b34000093f243dd4f \
+    --hash=sha256:041e9442b11409be5e4fc8b6a97e4bcead758ab1e11768d1e69160bdde18acc3 \
+    --hash=sha256:045b4dd0e5f6121e6f314d81759abd2c257db4634260abcfe0d3f7083c4908ef \
+    --hash=sha256:047c0a04e382ef8bd74b0de01407e8d8632d7d1b4db6f2561106af812a68741b \
+    --hash=sha256:068167c2d7bbeebd359665ac4fff756be5ffac9cda02375b5c5a7c4777038e73 \
+    --hash=sha256:148ff60e0fffa2f5fad2eb25aae7bef23d8f3b8bdaf947a65cdbe84a978092bc \
+    --hash=sha256:1d1c77013a259971a72ddaa83b9f42c80a93ff12df6a4723be99d858fa30bee3 \
+    --hash=sha256:1d48bc124a6b7a55006d97917f695effa9725d05abe8ee78fd60d6588b8344cd \
+    --hash=sha256:31dfa2fc323097f8ad7acd41aa38d7c614dd1960ac6681745b6da124093dc351 \
+    --hash=sha256:34f82db7f80c49f38b032c5abb605c458bac997a6c3142e0d6c130be6fb2b941 \
+    --hash=sha256:3d5dd8e5998fb4ace04789d1d008e2bb532de501218519d70bb672c4c5a2fc5d \
+    --hash=sha256:4a6ae52bd3ee41ee0f3acf4c60ceb3f44e0e3bc52ab7da1c2b2aa6703363a3d1 \
+    --hash=sha256:4b02a3b2a2f01d0490dd39321c74273fed0568568ea0e7ea23e02bd1fb10a10b \
+    --hash=sha256:4b843f8e1dd6a3195679d9838eb4670222e8b8d01bc36c9894d6c3538316fa0a \
+    --hash=sha256:5de53a28f40ef3c4fd57aeab6b590c2c663de87a5af76136ced519923d3efbb3 \
+    --hash=sha256:61b2b33ede821b94fa99ce0b09c9ece049c7067a33b279f343adfe35108a4ea7 \
+    --hash=sha256:6a3a9b0f45fd75dc05d8e93dc21b18fc1670135ec9544d1ad4acbcf6b86781d0 \
+    --hash=sha256:76ad8e4c69dadbb31bad17c16baee61c0d1a4a73bed2590b741b2e1a46d3edd0 \
+    --hash=sha256:7ba19b777dc00194d1b473180d4ca89a054dd18de27d0ee2e42a103ec9b7d014 \
+    --hash=sha256:7c1b7eab7a49aa96f3db1f716f0113a8a2e93c7375dd3d5d21c4941f1405c9c5 \
+    --hash=sha256:7fc0eee3046041387cbace9314926aa48b681202f8897f8bff3809967a049036 \
+    --hash=sha256:8ccd1c5fff1aa1427100ce188557fc31f1e0a383ad8ec42c559aabd4ff08802d \
+    --hash=sha256:8e08dd76de80539d613654915a2f5196dbccc67448df291e69a88712ea21e24a \
+    --hash=sha256:c18498c50c59263841862ea0501da9f2b3659c00db54abfbf823a80787fde8ce \
+    --hash=sha256:c49db89d602c24928e68c0d510f4fcf8989d77defd01c973d6cbe27e684833b1 \
+    --hash=sha256:ce20044d0317649ddbb4e54dab3c1bcc7483c78c27d3f58ab3d0c7e6bc60d26a \
+    --hash=sha256:d1071414dd06ca2eafa90c85a079169bfeb0e5f57fd0b45d44c092546fcd6fd9 \
+    --hash=sha256:d3be11ac43ab1a3e979dac80843b42226d5d3cccd3986f2e03152720a4297cd7 \
+    --hash=sha256:db603a1c235d110c860d5f39988ebc8218ee028f07a7cbc056ba6424372ca31b \
+    # via aiohttp, yarl
+oauthlib==3.0.1 \
+    --hash=sha256:0ce32c5d989a1827e3f1148f98b9085ed2370fc939bf524c9c851d8714797298 \
+    --hash=sha256:3e1e14f6cde7e5475128d30e97edc3bfb4dc857cb884d8714ec161fdbb3b358e \
+    # via requests-oauthlib
+pyasn1-modules==0.2.5 \
+    --hash=sha256:ef721f68f7951fab9b0404d42590f479e30d9005daccb1699b0a51bb4177db96 \
+    --hash=sha256:f309b6c94724aeaf7ca583feb1cc70430e10d7551de5e36edfc1ae6909bcfb3c \
+    # via google-auth
+pyasn1==0.4.5 \
+    --hash=sha256:da2420fe13a9452d8ae97a0e478adde1dee153b11ba832a95b223a2ba01c10f7 \
+    --hash=sha256:da6b43a8c9ae93bc80e2739efb38cc776ba74a886e3e9318d65fe81a8b8a2c6e \
+    # via pyasn1-modules, rsa
+python-dateutil==2.8.0 \
+    --hash=sha256:7e6584c74aeed623791615e26efd690f29817a27c73085b78e4bad02493df2fb \
+    --hash=sha256:c89805f6f4d64db21ed966fda138f8a5ed7a4fdbc1a8ee329ce1b74e3c74da9e \
+    # via kubernetes
+pyyaml==5.1 \
+    --hash=sha256:1adecc22f88d38052fb787d959f003811ca858b799590a5eaa70e63dca50308c \
+    --hash=sha256:436bc774ecf7c103814098159fbb84c2715d25980175292c648f2da143909f95 \
+    --hash=sha256:460a5a4248763f6f37ea225d19d5c205677d8d525f6a83357ca622ed541830c2 \
+    --hash=sha256:5a22a9c84653debfbf198d02fe592c176ea548cccce47553f35f466e15cf2fd4 \
+    --hash=sha256:7a5d3f26b89d688db27822343dfa25c599627bc92093e788956372285c6298ad \
+    --hash=sha256:9372b04a02080752d9e6f990179a4ab840227c6e2ce15b95e1278456664cf2ba \
+    --hash=sha256:a5dcbebee834eaddf3fa7366316b880ff4062e4bcc9787b78c7fbb4a26ff2dd1 \
+    --hash=sha256:aee5bab92a176e7cd034e57f46e9df9a9862a71f8f37cad167c6fc74c65f5b4e \
+    --hash=sha256:c51f642898c0bacd335fc119da60baae0824f2cde95b0330b56c0553439f0673 \
+    --hash=sha256:c68ea4d3ba1705da1e0d85da6684ac657912679a649e8868bd850d2c299cce13 \
+    --hash=sha256:e23d0cc5299223dcc37885dae624f382297717e459ea24053709675a976a3e19
+requests-oauthlib==1.2.0 \
+    --hash=sha256:bd6533330e8748e94bf0b214775fed487d309b8b8fe823dc45641ebcd9a32f57 \
+    --hash=sha256:d3ed0c8f2e3bbc6b344fa63d6f933745ab394469da38db16bdddb461c7e25140 \
+    # via kubernetes
+requests==2.22.0 \
+    --hash=sha256:11e007a8a2aa0323f5a921e9e6a2d7e4e67d9877e85773fba9ba6419025cbeb4 \
+    --hash=sha256:9cf5292fcd0f598c671cfc1e0d7d1a7f13bb8085e9a590f48c010551dc6c4b31 \
+    # via kubernetes, requests-oauthlib, taskcluster
+rsa==4.0 \
+    --hash=sha256:14ba45700ff1ec9eeb206a2ce76b32814958a98e372006c8fb76ba820211be66 \
+    --hash=sha256:1a836406405730121ae9823e19c6e806c62bbad73f890574fff50efa4122c487 \
+    # via google-auth
+six==1.12.0 \
+    --hash=sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c \
+    --hash=sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73 \
+    # via google-auth, kubernetes, mohawk, python-dateutil, structlog, taskcluster, websocket-client
+slugid==2.0.0 \
+    --hash=sha256:a950d98b72691178bdd4d6c52743c4a2aa039207cf7a97d71060a111ff9ba297 \
+    --hash=sha256:aec8b0e01c4ad32e38e12d609eab3ec912fd129aaf6b2ded0199b56a5f8fd67c \
+    # via taskcluster
+structlog==19.1.0 \
+    --hash=sha256:5feae03167620824d3ae3e8915ea8589fc28d1ad6f3edf3cc90ed7c7cb33fab5 \
+    --hash=sha256:db441b81c65b0f104a7ce5d86c5432be099956b98b8a2c8be0b3fb3a7a0b1536
+taskcluster-urls==11.0.0 \
+    --hash=sha256:18dcaa9c2412d34ff6c78faca33f0dd8f2384e3f00a98d5832c62d6d664741f0 \
+    --hash=sha256:2aceab7cf5b1948bc197f2e5e50c371aa48181ccd490b8bada00f1e3baf0c5cc \
+    --hash=sha256:74bd2110b5daaebcec5e1d287bf137b61cb8cf6b2d8f5f2b74183e32bc4e7c87 \
+    # via taskcluster
+taskcluster==7.0.1 \
+    --hash=sha256:93027ec6949289d8267595c5770c3d3f0902d9461d98081544dce60764f94f46 \
+    --hash=sha256:97e19674738515e6891f4d7928280aecb2686def8b9d72a15477d7297f34c18c \
+    --hash=sha256:c24a8a67db9306e5ff0fd140e5bb6489ba3dcaf0632b6a2052b2d649a30e7617
+urllib3==1.25.2 \
+    --hash=sha256:a53063d8b9210a7bdec15e7b272776b9d42b2fd6816401a0d43006ad2f9902db \
+    --hash=sha256:d363e3607d8de0c220d31950a8f38b18d5ba7c0830facd71a1c6b1036b7ce06c \
+    # via kubernetes, requests
+websocket-client==0.56.0 \
+    --hash=sha256:1151d5fb3a62dc129164292e1227655e4bbc5dd5340a5165dfae61128ec50aa9 \
+    --hash=sha256:1fd5520878b68b84b5748bb30e592b10d0a91529d5383f74f4964e72b297fd3a \
+    # via kubernetes
+yarl==1.3.0 \
+    --hash=sha256:024ecdc12bc02b321bc66b41327f930d1c2c543fa9a561b39861da9388ba7aa9 \
+    --hash=sha256:2f3010703295fbe1aec51023740871e64bb9664c789cba5a6bdf404e93f7568f \
+    --hash=sha256:3890ab952d508523ef4881457c4099056546593fa05e93da84c7250516e632eb \
+    --hash=sha256:3e2724eb9af5dc41648e5bb304fcf4891adc33258c6e14e2a7414ea32541e320 \
+    --hash=sha256:5badb97dd0abf26623a9982cd448ff12cb39b8e4c94032ccdedf22ce01a64842 \
+    --hash=sha256:73f447d11b530d860ca1e6b582f947688286ad16ca42256413083d13f260b7a0 \
+    --hash=sha256:7ab825726f2940c16d92aaec7d204cfc34ac26c0040da727cf8ba87255a33829 \
+    --hash=sha256:b25de84a8c20540531526dfbb0e2d2b648c13fd5dd126728c496d7c3fea33310 \
+    --hash=sha256:c6e341f5a6562af74ba55205dbd56d248daf1b5748ec48a0200ba227bb9e33f4 \
+    --hash=sha256:c9bb7c249c4432cd47e75af3864bc02d26c9594f49c82e2a28624417f0ae63b8 \
+    --hash=sha256:e060906c0c585565c718d1c3841747b61c5439af2211e185f6739a9412dfbde1 \
+    # via aiohttp
diff --git a/requirements/test.in b/requirements/test.in
new file mode 100644
index 0000000..da85881
--- /dev/null
+++ b/requirements/test.in
@@ -0,0 +1,4 @@
+-r base.in
+
+pytest
+pytest-coverage
diff --git a/requirements/test.txt b/requirements/test.txt
new file mode 100644
index 0000000..0cbc53c
--- /dev/null
+++ b/requirements/test.txt
@@ -0,0 +1,75 @@
+# SHA1:130fc19af7d15836ea1559a85d8216832b029187
+#
+# This file is autogenerated by pip-compile-multi
+# To update, run:
+#
+#    pip-compile-multi
+#
+-r base.txt
+atomicwrites==1.3.0 \
+    --hash=sha256:03472c30eb2c5d1ba9227e4c2ca66ab8287fbfbbda3888aa93dc2e28fc6811b4 \
+    --hash=sha256:75a9445bac02d8d058d5e1fe689654ba5a6556a1dfd8ce6ec55a0ed79866cfa6 \
+    # via pytest
+coverage==4.5.3 \
+    --hash=sha256:3684fabf6b87a369017756b551cef29e505cb155ddb892a7a29277b978da88b9 \
+    --hash=sha256:39e088da9b284f1bd17c750ac672103779f7954ce6125fd4382134ac8d152d74 \
+    --hash=sha256:3c205bc11cc4fcc57b761c2da73b9b72a59f8d5ca89979afb0c1c6f9e53c7390 \
+    --hash=sha256:465ce53a8c0f3a7950dfb836438442f833cf6663d407f37d8c52fe7b6e56d7e8 \
+    --hash=sha256:48020e343fc40f72a442c8a1334284620f81295256a6b6ca6d8aa1350c763bbe \
+    --hash=sha256:5296fc86ab612ec12394565c500b412a43b328b3907c0d14358950d06fd83baf \
+    --hash=sha256:5f61bed2f7d9b6a9ab935150a6b23d7f84b8055524e7be7715b6513f3328138e \
+    --hash=sha256:68a43a9f9f83693ce0414d17e019daee7ab3f7113a70c79a3dd4c2f704e4d741 \
+    --hash=sha256:6b8033d47fe22506856fe450470ccb1d8ba1ffb8463494a15cfc96392a288c09 \
+    --hash=sha256:7ad7536066b28863e5835e8cfeaa794b7fe352d99a8cded9f43d1161be8e9fbd \
+    --hash=sha256:7bacb89ccf4bedb30b277e96e4cc68cd1369ca6841bde7b005191b54d3dd1034 \
+    --hash=sha256:839dc7c36501254e14331bcb98b27002aa415e4af7ea039d9009409b9d2d5420 \
+    --hash=sha256:8f9a95b66969cdea53ec992ecea5406c5bd99c9221f539bca1e8406b200ae98c \
+    --hash=sha256:932c03d2d565f75961ba1d3cec41ddde00e162c5b46d03f7423edcb807734eab \
+    --hash=sha256:988529edadc49039d205e0aa6ce049c5ccda4acb2d6c3c5c550c17e8c02c05ba \
+    --hash=sha256:998d7e73548fe395eeb294495a04d38942edb66d1fa61eb70418871bc621227e \
+    --hash=sha256:9de60893fb447d1e797f6bf08fdf0dbcda0c1e34c1b06c92bd3a363c0ea8c609 \
+    --hash=sha256:9e80d45d0c7fcee54e22771db7f1b0b126fb4a6c0a2e5afa72f66827207ff2f2 \
+    --hash=sha256:a545a3dfe5082dc8e8c3eb7f8a2cf4f2870902ff1860bd99b6198cfd1f9d1f49 \
+    --hash=sha256:a5d8f29e5ec661143621a8f4de51adfb300d7a476224156a39a392254f70687b \
+    --hash=sha256:aca06bfba4759bbdb09bf52ebb15ae20268ee1f6747417837926fae990ebc41d \
+    --hash=sha256:bb23b7a6fd666e551a3094ab896a57809e010059540ad20acbeec03a154224ce \
+    --hash=sha256:bfd1d0ae7e292105f29d7deaa9d8f2916ed8553ab9d5f39ec65bcf5deadff3f9 \
+    --hash=sha256:c62ca0a38958f541a73cf86acdab020c2091631c137bd359c4f5bddde7b75fd4 \
+    --hash=sha256:c709d8bda72cf4cd348ccec2a4881f2c5848fd72903c185f363d361b2737f773 \
+    --hash=sha256:c968a6aa7e0b56ecbd28531ddf439c2ec103610d3e2bf3b75b813304f8cb7723 \
+    --hash=sha256:df785d8cb80539d0b55fd47183264b7002077859028dfe3070cf6359bf8b2d9c \
+    --hash=sha256:f406628ca51e0ae90ae76ea8398677a921b36f0bd71aab2099dfed08abd0322f \
+    --hash=sha256:f46087bbd95ebae244a0eda01a618aff11ec7a069b15a3ef8f6b520db523dcf1 \
+    --hash=sha256:f8019c5279eb32360ca03e9fac40a12667715546eed5c5eb59eb381f2f501260 \
+    --hash=sha256:fc5f4d209733750afd2714e9109816a29500718b32dd9a5db01c0cb3a019b96a \
+    # via pytest-cov
+more-itertools==7.0.0 \
+    --hash=sha256:2112d2ca570bb7c3e53ea1a35cd5df42bb0fd10c45f0fb97178679c3c03d64c7 \
+    --hash=sha256:c3e4748ba1aad8dba30a4886b0b1a2004f9a863837b8654e7059eebf727afa5a \
+    # via pytest
+pluggy==0.11.0 \
+    --hash=sha256:25a1bc1d148c9a640211872b4ff859878d422bccb59c9965e04eed468a0aa180 \
+    --hash=sha256:964cedd2b27c492fbf0b7f58b3284a09cf7f99b0f715941fb24a439b3af1bd1a \
+    # via pytest
+py==1.8.0 \
+    --hash=sha256:64f65755aee5b381cea27766a3a147c3f15b9b6b9ac88676de66ba2ae36793fa \
+    --hash=sha256:dc639b046a6e2cff5bbe40194ad65936d6ba360b52b3c3fe1d08a82dd50b5e53 \
+    # via pytest
+pytest-cov==2.7.1 \
+    --hash=sha256:2b097cde81a302e1047331b48cadacf23577e431b61e9c6f49a1170bbe3d3da6 \
+    --hash=sha256:e00ea4fdde970725482f1f35630d12f074e121a23801aabf2ae154ec6bdd343a \
+    # via pytest-cover
+pytest-cover==3.0.0 \
+    --hash=sha256:578249955eb3b5f3991209df6e532bb770b647743b7392d3d97698dc02f39ebb \
+    --hash=sha256:5bdb6c1cc3dd75583bb7bc2c57f5e1034a1bfcb79d27c71aceb0b16af981dbf4 \
+    # via pytest-coverage
+pytest-coverage==0.0 \
+    --hash=sha256:db6af2cbd7e458c7c9fd2b4207cee75258243c8a81cad31a7ee8cfad5be93c05 \
+    --hash=sha256:dedd084c5e74d8e669355325916dc011539b190355021b037242514dee546368
+pytest==4.5.0 \
+    --hash=sha256:1a8aa4fa958f8f451ac5441f3ac130d9fc86ea38780dd2715e6d5c5882700b24 \
+    --hash=sha256:b8bf138592384bd4e87338cb0f256bf5f615398a649d4bd83915f0e4047a5ca6
+wcwidth==0.1.7 \
+    --hash=sha256:3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e \
+    --hash=sha256:f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c \
+    # via pytest
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..8419de4
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""The setup script."""
+
+from glob import glob
+from os.path import basename, splitext
+
+from setuptools import find_packages, setup
+
+with open("README.rst") as readme_file:
+    readme = readme_file.read()
+
+with open("version.txt") as f:
+    version = f.read().rstrip()
+
+with open("requirements/base.in") as f:
+    install_requires = f.readlines()
+
+setup(
+    author="Rail Aliiev",
+    author_email="rail@mozilla.com",
+    classifiers=[
+        "Development Status :: 2 - Pre-Alpha",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)"
+        "Natural Language :: English",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+    ],
+    description="Autoscale scriptworkers in Kubernetes",
+    install_requires=install_requires,
+    license="MPL2.0",
+    long_description=readme,
+    include_package_data=True,
+    keywords="k8s-autoscale",
+    name="k8s_autoscale",
+    packages=find_packages(),
+    test_suite="tests",
+    url="https://github.com/mozilla-releng/k8s-autoscale",
+    version=version,
+    zip_safe=False,
+    entry_points={"console_scripts": ["k8s_autoscale=k8s_autoscale.cli:main"]},
+)
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_sla.py b/tests/test_sla.py
new file mode 100644
index 0000000..fd9609d
--- /dev/null
+++ b/tests/test_sla.py
@@ -0,0 +1,53 @@
+import pytest
+from k8s_autoscale.sla import get_new_worker_count
+
+args = {
+    "max_replicas": 10,
+    "avg_task_duration": 60,
+    "sla_seconds": 300,
+    "boot_time": 30,
+    "capacity_ratio": 1.0,
+}
+args_capacity = args.copy()
+args_capacity["capacity_ratio"] = 0.5
+
+
+@pytest.mark.parametrize(
+    "pending, running, booting, args, expected",
+    [
+        (0, 0, 0, args, 0),
+        (1, 0, 0, args, 1),
+        (10000, 0, 0, args, 10),
+        (0, 10, 0, args, -10),
+        (10, 20, 0, args, 0),
+        (30, 0, 0, args, 8),
+        (30, 2, 0, args, 6),
+        (30, 5, 0, args, 3),
+        (30, 6, 0, args, 2),
+        (30, 7, 0, args, 1),
+        (30, 8, 0, args, 0),
+        (30, 8, 2, args, 0),
+        (30, 8, 10, args, 0),
+        (30, 0, 10, args, 0),
+        (30, 5, 10, args, 0),
+        (30, 2, 2, args, 4),
+        (0, 2, 2, args, -4),
+        (0, 0, 2, args, -2),
+        (30, 2, 2, args_capacity, 0),
+        (30, 2, 0, args_capacity, 2),
+        (30, 0, 2, args_capacity, 2),
+        (0, 0, 2, args_capacity, -2),
+        (0, 4, 2, args_capacity, -6),
+    ],
+)
+def test_process(pending, running, booting, args, expected):
+    assert get_new_worker_count(pending, running, booting, args) == expected
+
+
+@pytest.mark.parametrize(
+    "pending, running, booting, args, exception_type",
+    [(0, 0, 0, {"sla_seconds": 10, "avg_task_duration": 20}, AssertionError)],
+)
+def test_process_raises(pending, running, booting, args, exception_type):
+    with pytest.raises(exception_type):
+        get_new_worker_count(pending, running, booting, args)
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..dc967f6
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,45 @@
+[tox]
+envlist = clean, py37, report, check
+
+[travis]
+python =
+    3.7: py37
+
+[testenv]
+depends = clean
+setenv =
+    PYTHONPATH = {toxinidir}/tests
+usedevelop = true
+deps =
+    -r {toxinidir}/requirements/test.txt
+commands =
+    {posargs:py.test --cov-config=tox.ini --cov-append --cov=k8s_autoscale --cov-report term-missing tests}
+
+[testenv:clean]
+skip_install = true
+deps = coverage
+commands = coverage erase
+depends =
+
+[testenv:report]
+skip_install = true
+deps = coverage
+commands = coverage report -m
+depends = py37
+parallel_show_output = true
+
+[testenv:check]
+skip_install = true
+deps =
+    black
+    check-manifest
+    pip-compile-multi
+    isort
+commands =
+    black --diff --check {toxinidir}
+    isort --check -rc -df {toxinidir}
+    pip-compile-multi verify
+    check-manifest -u -v {toxinidir}
+
+[coverage:run]
+branch = true
diff --git a/version.txt b/version.txt
new file mode 100644
index 0000000..6e8bf73
--- /dev/null
+++ b/version.txt
@@ -0,0 +1 @@
+0.1.0