build and push portainer image

.github/workflows/build-and-push-images.yml

@@ -0,0 +1,45 @@
+name: Build and Push Images
+
+on:
+  push:
+    tags:
+      - "*"
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: start-portainer-stack
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@49ed152c8eca782a232dede0303416e8f356c37b
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@69f6fc9d46f2f8bf0d5491e4aabe0bb8c6a4678a
+        with:
+          images: ${{ env.REGISTRY }}/chatton/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@e551b19e49efd4e98792db7592c17c09b89db8d8
+        with:
+          context: scripts/portainer
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

scripts/portainer/Dockerfile

@@ -0,0 +1,29 @@
+
+# Dockerfile References: https://docs.docker.com/engine/reference/builder/
+
+# Start from the latest golang base image
+FROM golang:latest as builder
+
+
+# Set the Current Working Directory inside the container
+WORKDIR /app
+
+# Copy the source from the current directory to the Working Directory inside the container
+COPY . .
+
+# Build the Go app
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+
+
+######## Start a new stage from scratch #######
+FROM alpine:latest  
+
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /root/
+
+# Copy the Pre-built binary file from the previous stage
+COPY --from=builder /app/main .
+
+# Command to run the executable
+ENTRYPOINT ["./main"]

scripts/portainer/client/client.go

@@ -26,6 +26,10 @@ type Credentials struct {
 	BaseUrl  string `json:"baseUrl"`
 }
 
+func (c Credentials) IsValid() bool {
+	return c.Username != "" && c.Password != "" && c.BaseUrl != ""
+}
+
 func NewPortainerClient(creds Credentials) (*PortainerClient, error) {
 	c := &PortainerClient{
 		baseUrl: creds.BaseUrl,

scripts/portainer/main.go

@@ -12,7 +12,34 @@ import (
 	"github.com/chatton/portainer/client"
 )
 
+const (
+	portainerUserNameEnv = "PORTAINER_USER_NAME"
+	portainerPasswordEnv = "PORTAINER_PASSWORD"
+	portainerBaseUrlEnv  = "PORTAINER_BASE_URL"
+)
+
+func loadCredsFromEnv() client.Credentials {
+	userName, _ := os.LookupEnv(portainerUserNameEnv)
+	password, _ := os.LookupEnv(portainerPasswordEnv)
+	baseUrl, _ := os.LookupEnv(portainerBaseUrlEnv)
+	return client.Credentials{
+		Username: userName,
+		Password: password,
+		BaseUrl:  baseUrl,
+	}
+}
+
 func loadCreds() client.Credentials {
+	// look for env vars first
+	creds := loadCredsFromEnv()
+	if creds.IsValid() {
+		return creds
+	}
+	// fallback to file
+	return loadCredsFromFile()
+}
+
+func loadCredsFromFile() client.Credentials {
 	usr, _ := user.Current()
 	credPath := fmt.Sprintf("%s/.homelab/portainer-creds.json", usr.HomeDir)