update: add Docker build and push workflow with multi-stage build support

Author: Esonhugh

.github/workflows/build.yaml

@@ -10,6 +10,34 @@ env:
 permissions: write-all
 
 jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: k8spider
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Extract metadata for the Docker image
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: k8spider/k8spider
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest
+            type=sha
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+
   goreleaser:
     runs-on: ubuntu-latest
     steps:

Dockerfile

@@ -0,0 +1,29 @@
+FROM golang:1.21 AS builder
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLE=0 go build -ldflags="-s -w" -tags netgo -o k8spider main.go
+
+RUN 	./k8spider all --help && \
+    	./k8spider axfr --help  && \
+    	./k8spider dns --help && \
+    	./k8spider dnssd --help && \
+    	./k8spider dnssd ptr --help && \
+    	./k8spider dnssd srv --help && \
+    	./k8spider metrics --help && \
+    	./k8spider neighbor --help && \
+    	./k8spider neighbor pod --help && \
+    	./k8spider neighbor svc --help && \
+    	./k8spider whereisdns --help && \
+    	./k8spider wild --help && \
+        echo "all command flag is successfully processed with no conflict"
+
+FROM alpine:latest
+LABEL maintainer="Esonhugh"
+LABEL name="k8spider"
+LABEL url="https://github.com/esonhugh/k8spider"
+LABEL description="A Powerful+Fast+Low Privilege Kubernetes discovery tools"
+COPY --from=builder /app/k8spider /k8spider
+ENTRYPOINT ["/k8spider"]
+CMD ["all"]

go.mod

@@ -2,8 +2,6 @@ module github.com/esonhugh/k8spider
 
 go 1.21.0
 
-toolchain go1.23.2
-
 require (
 	github.com/elastic/go-grok v0.3.1
 	github.com/miekg/dns v1.1.58