chore: write green-blue deploy script

.github/workflows/deploy.yml

@@ -16,34 +16,34 @@ on:
       - '**/*/Dockerfile'
       - 'scripts/**'
 jobs:
-  # build:
+  build:
-  #   name: Build and push Docker image
+    name: Build and push Docker image
-  #   runs-on: ubuntu-latest
+    runs-on: ubuntu-latest
-  #   outputs:
+    outputs:
-  #     version: ${{ steps.version.outputs.version }}
+      version: ${{ steps.version.outputs.version }}
-  #   steps:
+    steps:
-  #     - name: Checkout repository
+      - name: Checkout repository
-  #       uses: actions/checkout@v4
+        uses: actions/checkout@v4
-  #       with:
+        with:
-  #         fetch-depth: 0
+          fetch-depth: 0
-  #     - name: Login to Docker Hub
+      - name: Login to Docker Hub
-  #       uses: docker/login-action@v3
+        uses: docker/login-action@v3
-  #       with:
+        with:
-  #         username: ${{ secrets.DOCKERHUB_USERNAME }}
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
-  #         password: ${{ secrets.DOCKERHUB_TOKEN }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
-  #     - name: Create version tag
+      - name: Create version tag
-  #       id: version
+        id: version
-  #       run: echo "version=$(date +%Y.%m.%d.%H%M%S)" >> $GITHUB_OUTPUT
+        run: echo "version=$(date +%Y.%m.%d.%H%M%S)" >> $GITHUB_OUTPUT
-  #     - name: Build and push server image
+      - name: Build and push server image
-  #       working-directory: src/Blog
+        working-directory: src/Blog
-  #       run: |
+        run: |
-  #         TAG=${{ secrets.DOCKERHUB_USERNAME }}/blog.stevanfreeborn.com:${{ steps.version.outputs.version }}
+          TAG=${{ secrets.DOCKERHUB_USERNAME }}/blog.stevanfreeborn.com:${{ steps.version.outputs.version }}
-  #         docker build -t $TAG .
+          docker build -t $TAG .
-  #         docker push $TAG
+          docker push $TAG
   deploy:
     name: Deploy to server
     runs-on: ubuntu-latest
-    # needs: build
+    needs: build
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -67,4 +67,4 @@ jobs:
           key: ${{ secrets.SSH_KEY }}
           script: |
             chmod +x blog.stevanfreeborn.com/deploy.ps1
-            ./blog.stevanfreeborn.com/deploy.ps1
+            ./blog.stevanfreeborn.com/deploy.ps1 ${{ needs.build.outputs.version }}

scripts/deploy.ps1

@@ -1,3 +1,207 @@
 #!/bin/pwsh
 
-Write-Host "Deploying to production..."
+$NGINX_CONFIG_PATH = "/etc/nginx/sites-available/blog.ddnsgeek.com"
+
+function StartContainer {
+  param (
+    [string]$containerColor,
+    [string]$dockerTag
+  )
+
+  $containerName = "blog.stevanfreeborn.com.$containerColor"
+  $postDirEnv = "FilePostServiceOptions__PostsDirectory=wwwroot/posts"
+  $containerId = docker run -d -p 8080 --name $containerName --env $postDirEnv $dockerTag
+
+  if ($LASTEXITCODE -ne 0) 
+  {
+    Write-Host "Failed to run $containerName container."
+    exit 1;
+  }
+
+  $containerHostPort = $(docker port $containerId).Split(":")[1]
+  $running = $false
+  $attemptLimit = 12
+  $attempts = 0
+  $waitTimeInSeconds = 10
+
+  while ($running -eq $false -and $attempts -lt $attemptLimit)
+  {
+    $response = Invoke-WebRequest -Uri "http://localhost:$containerHostPort/rss" -UseBasicParsing
+
+    if ($response.StatusCode -eq 200) 
+    {
+      $running = $true
+    }
+    else 
+    {
+      Write-Host "Waiting for $containerName container to start..."
+      Start-Sleep -Seconds $waitTimeInSeconds
+    }
+  }
+
+  if ($running -eq $false) 
+  {
+    Write-Host "Failed to start $containerName container."
+    exit 1
+  }
+
+  return $containerHostPort
+}
+
+function UpdateNginxConfig {
+  param (
+    [string]$filePath,
+    [string]$portNumber
+  )
+
+  $nginxConfig = Get-Content $filePath
+  $pattern = "proxy_pass http://localhost:\d+;"
+  $replacement = "proxy_pass http://localhost:$portNumber;"
+
+  $modifiedContent = @()
+
+  foreach ($line in $nginxConfig) {
+    if ($line -match $pattern) {
+        $line = $line -replace $pattern, $replacement
+    }
+
+    $modifiedContent += $line
+  }
+
+  Set-Content -Path $filePath -Value $modifiedContent
+}
+
+# Get the version number from the command line
+$version = $args[0];
+
+if ($null -eq $version) 
+{
+  Write-Host "Please provide a version number."
+  exit 1
+}
+
+# check if docker is installed
+$dockerVersion = docker --version
+
+if ($null -eq $dockerVersion) 
+{
+  Write-Host "Docker is not installed. Please install Docker and try again."
+  exit 1
+}
+
+if (-not (Test-Path $NGINX_CONFIG_PATH)) 
+{
+  Write-Host "Nginx configuration file not found: $NGINX_CONFIG_PATH"
+  exit 1
+}
+
+# attempt to pull docker image
+$dockerTag = "stevanfreeborn/blog.stevanfreeborn.com:$version"
+docker pull $dockerTag
+
+if ($LASTEXITCODE -ne 0) 
+{
+  Write-Host "Failed to pull docker image: $dockerTag"
+  exit 1
+}
+
+# Checkif green container is running
+$greenContainerId = docker ps --filter "name=blog.stevanfreeborn.com.green" --format "{{.ID}}"
+
+if ($null -eq $greenContainerId) 
+{
+  Write-Host "Green container is running. Starting blue container."
+
+  $blueContainerHostPort = StartContainer -containerColor "blue" -dockerTag $dockerTag
+
+  Write-Host "Blue container is running."
+
+  UpdateNginxConfig -filePath $NGINX_CONFIG_PATH -portNumber $blueContainerHostPort
+
+  Write-Host "Nginx configuration updated to point to blue container on port $blueContainerHostPort."
+
+  sudo nginx -t
+
+  if ($LASTEXITCODE -ne 0) 
+  {
+    Write-Host "Nginx configuration test failed. Reverting changes."
+    Set-Content -Path $filePath -Value $nginxConfig
+    exit 1
+  }
+
+  sudo nginx -s reload
+
+  if ($LASTEXITCODE -ne 0) 
+  {
+    Write-Host "Failed to reload Nginx."
+    exit 1
+  }
+
+  Write-Host "Nginx reloaded. Successfully deployed version $version."
+
+  Write-Host "Stopping and removing green container."
+  
+  docker stop $greenContainerId
+
+  if ($LASTEXITCODE -ne 0) 
+  {
+    Write-Host "Failed to stop green container."
+    exit 1
+  }
+
+  docker rm $greenContainerId
+
+  if ($LASTEXITCODE -ne 0) 
+  {
+    Write-Host "Failed to remove green container."
+    exit 1
+  }
+
+  Write-Host "Green container stopped and removed."
+
+  Write-Host "Switching blue container to green container."
+
+  docker rename "blog.stevanfreeborn.com.blue" "blog.stevanfreeborn.com.green"
+
+  if ($LASTEXITCODE -ne 0) 
+  {
+    Write-Host "Failed to rename blue container to green container."
+    exit 1
+  }
+
+  Write-Host "Successfully deployed version $version."
+
+  exit 0
+}
+else 
+{
+  Write-Host "Green container is not running. Starting green container."
+
+  $greenContainerHostPort = StartContainer -containerColor "green" -dockerTag $dockerTag
+
+  Write-Host "Green container is running."
+  
+  UpdateNginxConfig -filePath $NGINX_CONFIG_PATH -portNumber $greenContainerHostPort
+
+  Write-Host "Nginx configuration updated to point to green container on port $greenContainerHostPort."
+
+  sudo nginx -t
+
+  if ($LASTEXITCODE -ne 0) 
+  {
+    Write-Host "Nginx configuration test failed. Reverting changes."
+    Set-Content -Path $filePath -Value $nginxConfig
+    exit 1
+  }
+
+  sudo nginx -s reload
+
+  if ($LASTEXITCODE -ne 0) 
+  {
+    Write-Host "Failed to reload Nginx."
+    exit 1
+  }
+
+  Write-Host "Nginx reloaded. Successfully deployed version $version."
+  exit 0
+}