Update debugging docs, GitHub Actions and golangci config

.github/workflows/build-docker-image.yml

@@ -35,12 +35,12 @@ concurrency:
 jobs:
   build:
     if: github.repository == 'apache/cloudstack-kubernetes-provider'
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
       - name: Set Docker repository name
         run: echo "DOCKER_REPOSITORY=apache" >> $GITHUB_ENV
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/build.yml

@@ -25,13 +25,13 @@ concurrency:
 
 jobs:
   build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
         go-version-file: go.mod
 

.github/workflows/golangci-lint.yml

@@ -30,9 +30,9 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
+      - uses: actions/checkout@v6
+      - uses: actions/setup-go@v6
         with:
           go-version-file: go.mod
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v9

.golangci.yml

@@ -1,53 +1,50 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-
-linters-settings:
-  goheader:
-    template: |-
-       * Licensed to the Apache Software Foundation (ASF) under one
-        * or more contributor license agreements.  See the NOTICE file
-        * distributed with this work for additional information
-        * regarding copyright ownership.  The ASF licenses this file
-        * to you under the Apache License, Version 2.0 (the
-        * "License"); you may not use this file except in compliance
-        * with the License.  You may obtain a copy of the License at
-        *
-        *   http://www.apache.org/licenses/LICENSE-2.0
-        *
-        * Unless required by applicable law or agreed to in writing,
-        * software distributed under the License is distributed on an
-        * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-        * KIND, either express or implied.  See the License for the
-        * specific language governing permissions and limitations
-        * under the License.
-
+version: "2"
+run:
+  modules-download-mode: readonly
+  issues-exit-code: 1
 linters:
   enable:
     - goheader
     - gosec
-    - gosimple
+    - misspell
     - govet
     - ineffassign
-    - misspell
     - staticcheck
-    - typecheck
     - unused
-
-run:
-  modules-download-mode: readonly
-  timeout: 5m
-  issues-exit-code: 1
+  settings:
+    goheader:
+      template: |-
+        * Licensed to the Apache Software Foundation (ASF) under one
+         * or more contributor license agreements.  See the NOTICE file
+         * distributed with this work for additional information
+         * regarding copyright ownership.  The ASF licenses this file
+         * to you under the Apache License, Version 2.0 (the
+         * "License"); you may not use this file except in compliance
+         * with the License.  You may obtain a copy of the License at
+         *
+         *   http://www.apache.org/licenses/LICENSE-2.0
+         *
+         * Unless required by applicable law or agreed to in writing,
+         * software distributed under the License is distributed on an
+         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+         * KIND, either express or implied.  See the License for the
+         * specific language governing permissions and limitations
+         * under the License.
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

Dockerfile

@@ -19,8 +19,13 @@ FROM --platform=$BUILDPLATFORM golang:1.23 AS builder
 ARG BUILDPLATFORM
 ARG TARGETOS
 ARG TARGETARCH
-COPY . /go/src/github.com/apache/cloudstack-kubernetes-provider
+
 WORKDIR /go/src/github.com/apache/cloudstack-kubernetes-provider
+COPY go.mod /go/src/github.com/apache/cloudstack-kubernetes-provider/go.mod
+COPY go.sum /go/src/github.com/apache/cloudstack-kubernetes-provider/go.sum
+RUN go mod download
+
+COPY . /go/src/github.com/apache/cloudstack-kubernetes-provider
 RUN make clean && CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} make
 
 FROM gcr.io/distroless/static:nonroot

Makefile

@@ -42,14 +42,21 @@ clean:
 cloudstack-ccm: ${CMD_SRC}
 	go build -ldflags ${LDFLAGS} -o $@ $^
 
-test:
+test: gofmt
 	go test -v
 	go vet
-	@(echo "gofmt -l"; FMTFILES="$$(gofmt -l .)"; if test -n "$${FMTFILES}"; then echo "Go files that need to be reformatted (use 'go fmt'):\n$${FMTFILES}"; exit 1; fi)
 
-docker:
+docker: gofmt
 	docker build . -t apache/cloudstack-kubernetes-provider:${GIT_COMMIT_SHORT}
 	docker tag apache/cloudstack-kubernetes-provider:${GIT_COMMIT_SHORT} apache/cloudstack-kubernetes-provider:latest
 ifneq (${GIT_IS_TAG},NOT_A_TAG)
 	docker tag apache/cloudstack-kubernetes-provider:${GIT_COMMIT_SHORT} apache/cloudstack-kubernetes-provider:${GIT_TAG}
 endif
+
+lint: gofmt
+	@(echo "Running golangci-lint...")
+	golangci-lint run
+
+gofmt:
+	@(echo "Running gofmt...")
+	@(echo "gofmt -l"; FMTFILES="$$(gofmt -l .)"; if test -n "$${FMTFILES}"; then echo "Go files that need to be reformatted (use 'go fmt'):\n$${FMTFILES}"; exit 1; fi)

README.md

@@ -126,7 +126,7 @@ Instead, it first obtains the name of the node from Kubernetes, then fetches inf
 
 ### Building
 
-At least Go 1.21 is required to build cloudstack-ccm.
+At least Go 1.23 is required to build cloudstack-ccm.
 
 To build the controller with correct versioning, some build flags need to be passed.
 A Makefile is provided that sets these build flags to automatically derived values.
@@ -151,13 +151,50 @@ The CCM supports the same cloud-config configuration file format used by [the cs
 so you can simply point it to that.
 
 ```bash
-./cloudstack-ccm --cloud-provider external-cloudstack --cloud-config ~/.cloud-config --master k8s-apiserver
+./cloudstack-ccm --cloud-provider external-cloudstack --cloud-config ./cloud-config --kubeconfig ~/.kube/config
 ```
 
 Replace k8s-apiserver with the host name of your Kubernetes development clusters's API server.
 
 If you don't have a 'real' CloudStack installation, you can also launch a local [simulator instance](https://hub.docker.com/r/cloudstack/simulator) instead. This is very useful for dry-run testing.
 
+### Debugging
+
+You can use the VSCode extension [Go](https://marketplace.visualstudio.com/items?itemName=golang.go) to debug the CCM.
+Add the following configuration to the `.vscode/launch.json` file to launch the CCM and debug it.
+
+```json
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch CloudStack CCM",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${workspaceFolder}/cmd/cloudstack-ccm",
+            "env": {},
+            "args": [
+                "--cloud-provider=external-cloudstack",
+                "--cloud-config=${workspaceFolder}/cloud-config",
+                "--kubeconfig=${env:HOME}/.kube/config",
+                "--leader-elect=false",
+                "--v=4"
+            ],
+            "showLog": true,
+            "trace": "verbose"
+        },
+        {
+            "name": "Attach to Process",
+            "type": "go",
+            "request": "attach",
+            "mode": "local",
+            "processId": 0
+        }
+    ]
+}
+```
+
 ## Copyright
 
 Copyright 2019 The Apache Software Foundation

cloudstack_loadbalancer.go

@@ -200,11 +200,11 @@ func (cs *CSCloud) EnsureLoadBalancer(ctx context.Context, clusterName string, s
 	for _, lbRule := range lb.rules {
 		protocol := ProtocolFromLoadBalancer(lbRule.Protocol)
 		if protocol == LoadBalancerProtocolInvalid {
-			return nil, fmt.Errorf("Error parsing protocol %v: %v", lbRule.Protocol, err)
+			return nil, fmt.Errorf("error parsing protocol %v: %v", lbRule.Protocol, err)
 		}
 		port, err := strconv.ParseInt(lbRule.Publicport, 10, 32)
 		if err != nil {
-			return nil, fmt.Errorf("Error parsing port %s: %v", lbRule.Publicport, err)
+			return nil, fmt.Errorf("error parsing port %s: %v", lbRule.Publicport, err)
 		}
 
 		klog.V(4).Infof("Deleting firewall rules associated with load balancer rule: %v (%v:%v:%v)", lbRule.Name, protocol, lbRule.Publicip, port)