cache nginx

Author: OriHoch

.github/workflows/cache-nginx-ci.yaml

@@ -0,0 +1,31 @@
+name: Cache Nginx CI
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - .github/workflows/cache-nginx-ci.yaml
+      - cache-nginx/**
+env:
+  IMAGE: ghcr.io/cloudwebmanage/cwm-cdn-api-cache-nginx
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/setup-buildx-action@v3
+      - id: docker_build
+        uses: docker/build-push-action@v6
+        with:
+          context: cache-nginx
+          push: true
+          tags: |
+            ${{ env.IMAGE }}:latest
+            ${{ env.IMAGE }}:${{ github.sha }}
+          cache-from: type=registry,ref=${{ env.IMAGE }}:buildcache-latest
+          cache-to: type=registry,ref=${{ env.IMAGE }}:buildcache-latest,mode=max

.github/workflows/ci.yaml

@@ -6,6 +6,8 @@ on:
     paths-ignore:
       - .github/workflows/nginx-ci.yaml
       - tenant-nginx
+      - .github/workflows/cache-nginx-ci.yaml
+      - cache-nginx/**
 env:
   IMAGE: ghcr.io/cloudwebmanage/cwm-cdn-api
   # these should match the versions in Dockerfile

cache-nginx/Dockerfile

@@ -0,0 +1,3 @@
+FROM nginx:alpine@sha256:42a516af16b852e33b7682d5ef8acbd5d13fe08fecadc7ed98605ba5e3b26ab8
+RUN apk update && apk add python3
+COPY entrypoint.py /docker-entrypoint.d/999-cache-nginx-py.sh

cache-nginx/entrypoint.py

@@ -0,0 +1,53 @@
+#!/usr/bin/python3
+import os
+
+
+TYPE = os.environ.get("TYPE", "router")  # router or cache
+NUM_CACHE_SERVERS = int(os.environ.get("NUM_CACHE_SERVERS", "3"))
+
+
+DEFAULT_CONF_ROUTER_TEMPLATE = '''
+upstream cache {
+  hash $http_x_cwmcdn_tenant_name$request_uri consistent;
+__SERVERS__
+}
+
+server {
+    listen       80;
+    server_name  _;
+    location / {
+        proxy_pass http://cache;
+    }
+}
+'''
+
+DEFAULT_CONF_CACHE_TEMPLATE = '''
+server {
+    listen       80;
+    server_name  _;
+    location / {
+        proxy_pass http://tenant.$http_x_cwmcdn_tenant_name;
+    }
+}
+'''
+
+
+def main():
+    if not TYPE or not NUM_CACHE_SERVERS:
+        raise Exception("TYPE, NUM_CACHE_SERVERS environment variables must be set")
+    if TYPE == "router":
+        default_conf = DEFAULT_CONF_ROUTER_TEMPLATE
+        servers_conf = []
+        for i in range(1, NUM_CACHE_SERVERS + 1):
+            servers_conf.append(f'  server cache{i}:80;')
+        default_conf = default_conf.replace("__SERVERS__", "\n".join(servers_conf))
+    elif TYPE == "cache":
+        default_conf = DEFAULT_CONF_CACHE_TEMPLATE
+    else:
+        raise Exception("TYPE must be 'router' or 'cache'")
+    with open("/etc/nginx/conf.d/default.conf", "w") as f:
+        f.write(default_conf)
+
+
+if __name__ == "__main__":
+    main()