refactor(dev): add dlv debuger for virt-handler (#538)

add dlv debuger for virt-handler

Signed-off-by: yaroslavborbat <[email protected]>

Taskfile.yaml

@@ -147,3 +147,36 @@ tasks:
     cmds:
       - task: cve:bin
       - tools/cve/scan-main.sh {{.REPORT_FILE_NAME}}
+
+  dlv:virt-handler:build:
+    desc: "Build image virt-handler with dlv"
+    cmd: docker build -f ./images/virt-handler/debug/dlv.Dockerfile -t "{{ .DLV_IMAGE }}" .
+
+  dlv:virt-handler:build-push:
+    desc: "Build and Push image virt-handler with dlv"
+    cmds:
+      - task: dlv:virt-handler:build
+      - docker push "{{ .DLV_IMAGE }}"
+      - task: dlv:virt-handler:print
+
+  dlv:virt-handler:print:
+    desc: "Print commands for debug"
+    env:
+      IMAGE: "{{ .DLV_IMAGE }}"
+    cmd: |
+      cat <<EOF
+      kubectl -n d8-virtualization patch ds virt-handler --type='strategic' -p '{
+        "spec": {
+          "template": {
+            "spec": {
+              "containers": [ {
+                "name": "virt-handler",
+                "image": "${IMAGE}",
+                "ports": [ { "containerPort": 2345, "name": "dlv" } ]
+              }]
+            }
+          }
+        }
+      }'
+      kubectl -n d8-virtualization port-forward pod/<virt-handler-pod> 2345:2345
+      EOF

images/virt-handler/debug/dlv.Dockerfile

@@ -0,0 +1,64 @@
+FROM alt:p11@sha256:39f03d3bca1a92dc36835c28c2ba2f22ec15257e950b3930e0a3f034466e8dfb AS basealt
+RUN groupadd --gid 1001 nonroot-user && useradd nonroot-user --uid 1001 --gid 1001 --shell /bin/bash --create-home
+
+FROM basealt AS builder
+
+RUN apt-get update
+
+RUN apt-get install -y \
+    git curl pkg-config \
+    libvirt-libs libtool libvirt-devel libncurses-devel \
+    libvirt-client libvirt-daemon libvirt \
+    gcc gcc-c++ glibc-devel-static \
+    glibc \
+    golang && \
+    apt-get clean && \
+    rm --recursive --force /var/lib/apt/lists/ftp.altlinux.org* /var/cache/apt/*.bin
+
+ENV VERSION="1.3.1"
+ENV GOVERSION="1.22.7"
+
+RUN mkdir /kubevirt-config-files && echo "v$VERSION-dirty" > /kubevirt-config-files/.version
+
+RUN go install github.com/go-delve/delve/cmd/dlv@latest
+
+RUN git clone --depth 1 --branch v$VERSION https://github.com/kubevirt/kubevirt.git /kubevirt
+COPY ./images/virt-artifact/patches /patches
+WORKDIR /kubevirt
+RUN for p in /patches/*.patch ; do git apply  --ignore-space-change --ignore-whitespace ${p} && echo OK || (echo FAIL ; exit 1) ; done
+
+RUN go mod edit -go=$GOVERSION && \
+    go mod download
+
+RUN go mod vendor
+
+ENV GO111MODULE=on
+ENV GOOS=linux
+ENV CGO_ENABLED=1
+ENV GOARCH=amd64
+
+RUN go build -o /kubevirt-binaries/virt-handler ./cmd/virt-handler/
+RUN gcc -static cmd/container-disk-v2alpha/main.c -o /kubevirt-binaries/container-disk
+RUN go build -o /kubevirt-binaries/virt-chroot ./cmd/virt-chroot/
+
+FROM basealt
+
+RUN apt-get update && apt-get install --yes \
+        acl \
+        procps \
+        nftables \
+        qemu-img==9.0.2-alt3 \
+        xorriso==1.5.6-alt1 && \
+    apt-get clean && \
+    rm --recursive --force /var/lib/apt/lists/ftp.altlinux.org* /var/cache/apt/*.bin
+
+COPY --from=builder /kubevirt/cmd/virt-handler/virt_launcher.cil /virt_launcher.cil
+COPY --from=builder /kubevirt-config-files/.version /.version
+COPY --from=builder /kubevirt/cmd/virt-handler/nsswitch.conf /etc/nsswitch.conf
+
+COPY --from=builder /kubevirt-binaries/virt-handler /usr/bin/virt-handler
+COPY --from=builder /kubevirt-binaries/virt-chroot /usr/bin/virt-chroot
+COPY --from=builder /kubevirt-binaries/container-disk /usr/bin/container-disk
+COPY --from=builder /root/go/bin/dlv /usr/bin/dlv
+
+ENTRYPOINT ["/usr/bin/dlv", "--listen=:2345", "--headless=true", "--continue", "--log=true", "--log-output=debugger,debuglineerr,gdbwire,lldbout,rpc", "--accept-multiclient", "--api-version=2", "exec", "/usr/bin/virt-handler", "--"]