updated sample compose file to reflect zero downtime deployment on the actual compose file

docker-update.zsh

@@ -1,8 +1,36 @@
 #!/usr/bin/env zsh
-
-echo updating docker compose with latest build image
+set -e
+echo "pulling latest build image..."
 docker compose pull
-docker compose up -d
-echo finished updating and builing. Site will be down for a few seconds
+
+# Check which service is running
+if docker compose ps blog-blue --filter "status=running" -q | grep -q .; then
+	CURRENT="blog-blue"
+	TARGET="blog-green"
+else
+	CURRENT="blog-green"
+	TARGET="blog-blue"
+fi
+
+echo "Current: $CURRENT -> deploying Target: $TARGET"
+
+# TODO dont run if 0 instances running
+# Scale current deployment to two instances, keeping the old one and adding a running env of the new one
+docker compose up -d --no-deps $TARGET
+
+echo "waiting for $TARGET to pass healthcheck..."
+# docker ps --filter 'label=com.docker.compose.service=blog' --filter 'health=starting'
+until [[ "$(docker inspect --format '{{.State.Health.Status}}' $(docker compose ps -q $TARGET) 2>/dev/null)" == "healthy" ]]; do
+	sleep 1
+done
+
+# Give traefik backend a few seconds to update
+sleep 3
+
+echo "Stopping $CURRENT..."
+docker compose stop $CURRENT
+docker compose rm -f $CURRENT
+
+echo "Zero downtime deployment to $TARGET complete."
 # TODO zero downtime deployment
 # TODO run on a cron job

sample-docker-compose.yml

@@ -1,25 +1,30 @@
-services:
-  web:
-    build:
-      context: .
-      dockerfile: Dockerfile
-      args:
-        SITE_DOMAIN: "${SITE_DOMAIN:?Error: SITE_DOMAIN is not set. Please define SITE_DOMAIN in .env}"
-        SITE_URL: "${SITE_URL:-https://${SITE_DOMAIN}}"
-        PORT: "${PORT:-8080}"
-    image: river-rooks-blog:latest
-    container_name: river_rooks_web
+x-blog-templage: &blog-base
+    image: git.riverrooks.dev/venus/river-rooks-blog:latest
     restart: unless-stopped
-    healthcheck:
-      test: ["CMD", "node", "test/healthcheck.js"]
-      interval: 30s
-      timeout: 3s
-      start_period: 3s
-      retries: 3
+    volumes:
+      - "./posts:/app/src/posts"
     environment:
       - "SITE_DOMAIN=${SITE_DOMAIN:?Error: SITE_DOMAIN is not set. Please define SITE_DOMAIN in .env}"
       - "SITE_URL=${SITE_URL:-https://${SITE_DOMAIN}}"
       - "PORT=${PORT:-8080}"
+      - "WATCH=true"
+      - "API_SECRET=${API_SECRET}"
     ports:
       - "${HOST_PORT:-${PORT:-8080}}:${PORT:-8080}"
-
+    networks:
+      - backend
+    healthcheck:
+      test: ["CMD-SHELL", "wget -qO- http://127.0.0.1:${PORT:-8080}/healthz > /dev/null || exit 1"]
+      interval: 5s
+      timeout: 3s
+      retries: 3
+      start_period: 5s
+    # I Have this deployed with a series of traefik labels but that's not strictly nessescary
+services:
+  blog-blue:
+    <<: *blog-base
+  blog-green:
+    <<: *blog-base
+networks:
+  backend:
+    external: true