Add CI/CD pipeline

.drone-manifest.yml

@@ -0,0 +1,22 @@
+image: happydomain/checker-alias:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  - image: happydomain/checker-alias:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
+    platform:
+      architecture: amd64
+      os: linux
+  - image: happydomain/checker-alias:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
+    platform:
+      architecture: arm64
+      os: linux
+      variant: v8
+  - image: happydomain/checker-alias:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm
+    platform:
+      architecture: arm
+      os: linux
+      variant: v7

.drone.yml

@@ -0,0 +1,187 @@
+---
+kind: pipeline
+type: docker
+name: build-amd64
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+  - name: checker build
+    image: golang:1-alpine
+    commands:
+      - apk add --no-cache git make
+      - make
+    environment:
+      CHECKER_VERSION: "${DRONE_BRANCH}-${DRONE_COMMIT}"
+      CGO_ENABLED: 0
+    when:
+      event:
+        exclude:
+          - tag
+
+  - name: checker build tag
+    image: golang:1-alpine
+    commands:
+      - apk add --no-cache git make
+      - make
+    environment:
+      CHECKER_VERSION: "${DRONE_SEMVER}"
+      CGO_ENABLED: 0
+    when:
+      event:
+        - tag
+
+  - name: publish on Docker Hub
+    image: plugins/docker
+    settings:
+      repo: happydomain/checker-alias
+      auto_tag: true
+      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
+      dockerfile: Dockerfile
+      build_args:
+        - CHECKER_VERSION=${DRONE_BRANCH}-${DRONE_COMMIT}
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      event:
+        exclude:
+          - tag
+
+  - name: publish on Docker Hub (tag)
+    image: plugins/docker
+    settings:
+      repo: happydomain/checker-alias
+      auto_tag: true
+      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
+      dockerfile: Dockerfile
+      build_args:
+        - CHECKER_VERSION=${DRONE_SEMVER}
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      event:
+        - tag
+
+trigger:
+  branch:
+    exclude:
+      - renovate/*
+  event:
+    - cron
+    - push
+    - tag
+
+---
+kind: pipeline
+type: docker
+name: build-arm64
+
+platform:
+  os: linux
+  arch: arm64
+
+steps:
+  - name: checker build
+    image: golang:1-alpine
+    commands:
+      - apk add --no-cache git make
+      - make
+    environment:
+      CHECKER_VERSION: "${DRONE_BRANCH}-${DRONE_COMMIT}"
+      CGO_ENABLED: 0
+    when:
+      event:
+        exclude:
+          - tag
+
+  - name: checker build tag
+    image: golang:1-alpine
+    commands:
+      - apk add --no-cache git make
+      - make
+    environment:
+      CHECKER_VERSION: "${DRONE_SEMVER}"
+      CGO_ENABLED: 0
+    when:
+      event:
+        - tag
+
+  - name: publish on Docker Hub
+    image: plugins/docker
+    settings:
+      repo: happydomain/checker-alias
+      auto_tag: true
+      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
+      dockerfile: Dockerfile
+      build_args:
+        - CHECKER_VERSION=${DRONE_BRANCH}-${DRONE_COMMIT}
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      event:
+        exclude:
+          - tag
+
+  - name: publish on Docker Hub (tag)
+    image: plugins/docker
+    settings:
+      repo: happydomain/checker-alias
+      auto_tag: true
+      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
+      dockerfile: Dockerfile
+      build_args:
+        - CHECKER_VERSION=${DRONE_SEMVER}
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      event:
+        - tag
+
+trigger:
+  event:
+    - cron
+    - push
+    - tag
+
+---
+kind: pipeline
+name: docker-manifest
+
+platform:
+  os: linux
+  arch: arm64
+
+steps:
+  - name: publish on Docker Hub
+    image: plugins/manifest
+    settings:
+      auto_tag: true
+      ignore_missing: true
+      spec: .drone-manifest.yml
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+
+trigger:
+  branch:
+    exclude:
+      - renovate/*
+  event:
+    - cron
+    - push
+    - tag
+
+depends_on:
+  - build-amd64
+  - build-arm64

checker/collect.go

@@ -57,19 +57,24 @@ func (p *aliasProvider) Collect(ctx context.Context, opts sdk.CheckerOptions) (a
 // resolveOwner prefers the "service" option because its dns.CNAME owner is
 // authoritative; subdomain + domain_name is the fallback for ad-hoc forms.
 func resolveOwner(opts sdk.CheckerOptions) (string, error) {
+	parent, _ := sdk.GetOption[string](opts, "domain_name")
+	parent = strings.TrimSuffix(parent, ".")
+
 	if svcMsg, ok := sdk.GetOption[serviceMessage](opts, "service"); ok && len(svcMsg.Service) > 0 {
 		var c cnameService
-		if err := json.Unmarshal(svcMsg.Service, &c); err == nil && c.Record != nil && c.Record.Hdr.Name != "" {
+		if err := json.Unmarshal(svcMsg.Service, &c); err == nil && c.Record != nil {
-			return lowerFQDN(c.Record.Hdr.Name), nil
+			// svcMsg.Domain holds the subdomain (relative to apex); the
+			// record's Hdr.Name is relative to that mount point. Build the
+			// origin first, then join the record name into it.
+			origin := sdk.JoinRelative(strings.TrimSuffix(svcMsg.Domain, "."), parent)
+			return lowerFQDN(sdk.JoinRelative(c.Record.Hdr.Name, origin)), nil
 		}
 	}
 
-	parent, _ := sdk.GetOption[string](opts, "domain_name")
 	sub, _ := sdk.GetOption[string](opts, "subdomain")
 	if parent == "" {
 		return "", fmt.Errorf("missing 'domain_name' option")
 	}
-	parent = strings.TrimSuffix(parent, ".")
 	if sub == "" || sub == "@" {
 		return lowerFQDN(parent), nil
 	}

checker/definition.go

@@ -17,8 +17,6 @@ func Definition() *sdk.CheckerDefinition {
 		Version: Version,
 		Availability: sdk.CheckerAvailability{
 			ApplyToService: true,
-			ApplyToDomain:  true,
-			ApplyToZone:    true,
 			LimitToServices: []string{
 				"svcs.CNAME",
 				"svcs.SpecialCNAME",
@@ -65,6 +63,11 @@ func Definition() *sdk.CheckerDefinition {
 					Label:    "Service",
 					AutoFill: sdk.AutoFillService,
 				},
+				{
+					Id:       "domain_name",
+					Label:    "Parent domain name",
+					AutoFill: sdk.AutoFillDomainName,
+				},
 			},
 		},
 		Rules: []sdk.CheckRule{