Backport of [NET-4968] Upgrade Go to 1.21 into release/1.15.x

.changelog/20062.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+Upgrade to use Go 1.21.6.
+```

.github/workflows/go-tests.yml

@@ -423,17 +423,19 @@ jobs:
       consul-license: ${{secrets.CONSUL_LICENSE}}
       datadog-api-key: "${{ !endsWith(github.repository, '-enterprise') && secrets.DATADOG_API_KEY || '' }}"
 
-  go-test-api-1-19:
+  go-test-api-backwards-compatibility:
+    name: go-test-api-${{ needs.get-go-version.outputs.go-version-previous }}
     needs:
       - setup
+      - get-go-version
       - dev-build
     uses: ./.github/workflows/reusable-unit.yml
     with:
       directory: api
       runs-on: ${{ needs.setup.outputs.compute-large }}
       repository-name: ${{ github.repository }}
       go-tags: "${{ github.event.repository.name == 'consul-enterprise' && 'consulent consulprem consuldev' || '' }}"
-      go-version: "1.19"
+      go-version: ${{ needs.get-go-version.outputs.go-version-previous }}
     permissions:
       id-token: write # NOTE: this permission is explicitly required for Vault auth.
       contents: read
@@ -442,17 +444,18 @@ jobs:
       consul-license: ${{secrets.CONSUL_LICENSE}}
       datadog-api-key: "${{ !endsWith(github.repository, '-enterprise') && secrets.DATADOG_API_KEY || '' }}"
 
-  go-test-api-1-20:
+  go-test-api:
     needs:
       - setup
+      - get-go-version
       - dev-build
     uses: ./.github/workflows/reusable-unit.yml
     with:
       directory: api
       runs-on: ${{ needs.setup.outputs.compute-large }}
       repository-name: ${{ github.repository }}
       go-tags: "${{ github.event.repository.name == 'consul-enterprise' && 'consulent consulprem consuldev' || '' }}"
-      go-version: "1.20"
+      go-version: ${{ needs.get-go-version.outputs.go-version }}
     permissions:
       id-token: write # NOTE: this permission is explicitly required for Vault auth.
       contents: read
@@ -461,17 +464,19 @@ jobs:
       consul-license: ${{secrets.CONSUL_LICENSE}}
       datadog-api-key: "${{ !endsWith(github.repository, '-enterprise') && secrets.DATADOG_API_KEY || '' }}"
 
-  go-test-sdk-1-19:
+  go-test-sdk-backwards-compatibility:
+    name: go-test-sdk-${{ needs.get-go-version.outputs.go-version-previous }}
     needs:
       - setup
+      - get-go-version
       - dev-build
     uses: ./.github/workflows/reusable-unit.yml
     with:
       directory: sdk
       runs-on: ${{ needs.setup.outputs.compute-large }}
       repository-name: ${{ github.repository }}
       go-tags: "${{ github.event.repository.name == 'consul-enterprise' && 'consulent consulprem consuldev' || '' }}"
-      go-version: "1.19"
+      go-version: ${{ needs.get-go-version.outputs.go-version-previous }}
     permissions:
       id-token: write # NOTE: this permission is explicitly required for Vault auth.
       contents: read
@@ -480,17 +485,18 @@ jobs:
       consul-license: ${{secrets.CONSUL_LICENSE}}
       datadog-api-key: "${{ !endsWith(github.repository, '-enterprise') && secrets.DATADOG_API_KEY || '' }}"
 
-  go-test-sdk-1-20:
+  go-test-sdk:
     needs:
       - setup
+      - get-go-version
       - dev-build
     uses: ./.github/workflows/reusable-unit.yml
     with:
       directory: sdk
       runs-on: ${{ needs.setup.outputs.compute-large }}
       repository-name: ${{ github.repository }}
       go-tags: "${{ github.event.repository.name == 'consul-enterprise' && 'consulent consulprem consuldev' || '' }}"
-      go-version: "1.20"
+      go-version: ${{ needs.get-go-version.outputs.go-version }}
     permissions:
       id-token: write # NOTE: this permission is explicitly required for Vault auth.
       contents: read
@@ -536,10 +542,10 @@ jobs:
       - go-test-race
       - go-test-envoyextensions
       - go-test-troubleshoot
-      - go-test-api-1-19
-      - go-test-api-1-20
-      - go-test-sdk-1-19
-      - go-test-sdk-1-20
+      - go-test-api-backwards-compatibility
+      - go-test-api
+      - go-test-sdk-backwards-compatibility
+      - go-test-sdk
       - go-test-32bit
     # - go-test-s390x
     runs-on: ${{ fromJSON(needs.setup.outputs.compute-small) }}

.github/workflows/reusable-get-go-version.yml

@@ -6,13 +6,17 @@ on:
       go-version:
         description: "The Go version detected by this workflow"
         value: ${{ jobs.get-go-version.outputs.go-version }}
+      go-version-previous:
+        description: "The Go version (MAJOR.MINOR) prior to the current one, used for backwards compatibility testing"
+        value: ${{ jobs.get-go-version.outputs.go-version-previous }}
 
 jobs:
   get-go-version:
     name: "Determine Go toolchain version"
     runs-on: ubuntu-latest
     outputs:
       go-version: ${{ steps.get-go-version.outputs.go-version }}
+      go-version-previous: ${{ steps.get-go-version.outputs.go-version-previous }}
     steps:
       - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
       - name: Determine Go version
@@ -32,3 +36,7 @@ jobs:
           GO_VERSION=$(head -n 1 .go-version)
           echo "Building with Go ${GO_VERSION}"
           echo "go-version=${GO_VERSION}" >> $GITHUB_OUTPUT
+          GO_MINOR_VERSION=${GO_VERSION%.*}
+          GO_VERSION_PREVIOUS="${GO_MINOR_VERSION%.*}.$((${GO_MINOR_VERSION#*.}-1))"
+          echo "Previous version ${GO_VERSION_PREVIOUS}"
+          echo "go-version-previous=${GO_VERSION_PREVIOUS}" >> $GITHUB_OUTPUT

.github/workflows/reusable-lint.yml

@@ -48,11 +48,13 @@ jobs:
         with:
           go-version: ${{ inputs.go-version }}
       - run: go env
+      - name: Set golangci-lint version
+        run: echo "GOLANGCI_LINT_VERSION=$(make --no-print-directory print-GOLANGCI_LINT_VERSION)" >> $GITHUB_ENV
       - name: lint-${{ matrix.directory }}
         uses: golangci/golangci-lint-action@08e2f20817b15149a52b5b3ebe7de50aff2ba8c5 # pin@v3.4.0
         with:
           working-directory: ${{ matrix.directory }}
-          version: v1.51.1
+          version: ${{ env.GOLANGCI_LINT_VERSION }}
           args: --build-tags="${{ env.GOTAGS }}" -v
           skip-cache: true
       - name: Notify Slack

.go-version

@@ -1 +1 @@
-1.20.12
+1.21.6

.golangci.yml

@@ -90,17 +90,14 @@ linters-settings:
               - github.com/hashicorp/consul-net-rpc/go-msgpack
 
   depguard:
-    list-type: denylist
-    include-go-root: true
-    # A list of packages for the list type specified.
-    # Default: []
-    packages:
-      - net/rpc
-    # A list of packages for the list type specified.
-    # Specify an error message to output when a denied package is used.
-    # Default: []
-    packages-with-error-message:
-      - net/rpc: "only use forked copy in github.com/hashicorp/consul-net-rpc/net/rpc"
+    rules:
+      main:
+        listMode: lax
+        deny:
+        - pkg: net/rpc
+          desc: "only use forked copy in github.com/hashicorp/consul-net-rpc/net/rpc"
+        - pkg: github.com/golang/protobuf
+          desc: "only use google.golang.org/protobuf"
 
 run:
   timeout: 10m

GNUmakefile

@@ -7,7 +7,7 @@ SHELL = bash
 # These version variables can either be a valid string for "go install <module>@<version>"
 # or the string @DEV to imply use what is currently installed locally.
 ###
-GOLANGCI_LINT_VERSION='v1.51.1'
+GOLANGCI_LINT_VERSION='v1.55.2'
 MOCKERY_VERSION='v2.20.0'
 BUF_VERSION='v1.4.0'
 PROTOC_GEN_GO_GRPC_VERSION="v1.2.0"

api/api_test.go

@@ -699,8 +699,11 @@ func TestAPI_ClientTLSOptions(t *testing.T) {
 
 		// Should fail
 		_, err = client.Agent().Self()
-		if err == nil || !strings.Contains(err.Error(), "bad certificate") {
-			t.Fatal(err)
+		// Check for one of the possible cert error messages
+		// See https://cs.opensource.google/go/go/+/62a994837a57a7d0c58bb364b580a389488446c9
+		if err == nil || !(strings.Contains(err.Error(), "tls: bad certificate") ||
+			strings.Contains(err.Error(), "tls: certificate required")) {
+			t.Fatalf("expected tls certificate error, but got '%v'", err)
 		}
 	})