From fe665d96f2c842d4a559f700444fecc661a03e12 Mon Sep 17 00:00:00 2001 From: Luca Seritan Date: Mon, 3 Jun 2024 18:50:20 +0300 Subject: [PATCH] feat(examples): Add nginx-nodejs-redis compose example This example was derived from the analog example from docker/awesome-compose. Signed-off-by: Luca Seritan --- .../examples-nginx-nodejs-redis.yaml | 47 ++ examples/nginx-nodejs-redis/README.md | 131 ++++ examples/nginx-nodejs-redis/compose.yaml | 52 ++ examples/nginx-nodejs-redis/nginx/nginx.conf | 31 + examples/nginx-nodejs-redis/web/.gitignore | 1 + examples/nginx-nodejs-redis/web/Dockerfile | 12 + examples/nginx-nodejs-redis/web/Kraftfile | 7 + .../nginx-nodejs-redis/web/package-lock.json | 596 ++++++++++++++++++ examples/nginx-nodejs-redis/web/package.json | 16 + examples/nginx-nodejs-redis/web/server.js | 44 ++ 10 files changed, 937 insertions(+) create mode 100644 .github/workflows/examples-nginx-nodejs-redis.yaml create mode 100644 examples/nginx-nodejs-redis/README.md create mode 100644 examples/nginx-nodejs-redis/compose.yaml create mode 100644 examples/nginx-nodejs-redis/nginx/nginx.conf create mode 100644 examples/nginx-nodejs-redis/web/.gitignore create mode 100644 examples/nginx-nodejs-redis/web/Dockerfile create mode 100644 examples/nginx-nodejs-redis/web/Kraftfile create mode 100644 examples/nginx-nodejs-redis/web/package-lock.json create mode 100644 examples/nginx-nodejs-redis/web/package.json create mode 100644 examples/nginx-nodejs-redis/web/server.js diff --git a/.github/workflows/examples-nginx-nodejs-redis.yaml b/.github/workflows/examples-nginx-nodejs-redis.yaml new file mode 100644 index 00000000..7f2bc2f3 --- /dev/null +++ b/.github/workflows/examples-nginx-nodejs-redis.yaml @@ -0,0 +1,47 @@ +name: examples/nginx-nodejs-redis + +on: + repository_dispatch: + types: [core_merge] + + workflow_dispatch: + + schedule: + - cron: '0 0 * * *' # Everyday at 12AM + + push: + branches: [main] + paths: + - 'examples/nginx-nodejs-redis/**' + - '.github/workflows/examples-nginx-nodejs-redis.yaml' + - '!examples/nginx-nodejs-redis/README.md' + + pull_request: + types: [opened, synchronize, reopened] + branches: [main] + paths: + - 'examples/nginx-nodejs-redis/**' + - '.github/workflows/examples-nginx-nodejs-redis.yaml' + - '!examples/nginx-nodejs-redis/README.md' + +jobs: + up: + runs-on: ubuntu-latest + + steps: + - uses: actions/checkout@v3 + + - name: kraft compose up + uses: unikraft/kraftkit@staging + with: + loglevel: debug + workdir: examples/nginx-nodejs-redis + runtimedir: /github/workspace/.kraftkit + privileged: true + run: | + set -xe + + sudo KRAFTKIT_NO_WARN_SUDO=1 kraft compose up -d + curl -s localhost:8080 + curl -s localhost:8080 + diff --git a/examples/nginx-nodejs-redis/README.md b/examples/nginx-nodejs-redis/README.md new file mode 100644 index 00000000..2e838492 --- /dev/null +++ b/examples/nginx-nodejs-redis/README.md @@ -0,0 +1,131 @@ +## Compose sample application + +## Node.js application with Nginx proxy and Redis database + +This example was derived from the [nginx-nodejs-redis docker/awesome-compose example](https://github.com/docker/awesome-compose/tree/master/nginx-nodejs-redis). + +Project structure: + +```bash +. +├── README.md +├── compose.yaml +├── nginx +│   └── nginx.conf +└── web + ├── Kraftfile + ├── Dockerfile + ├── package.json + └── server.js + +2 directories, 7 files + + +``` + +[_compose.yaml_](compose.yaml) + +```yaml +services: + redis: + image: redis:7.2 + ports: + - '6379:6379' + networks: + internal: + ipv4_address: 172.23.0.2 + mem_reservation: 512M + + web1: + build: ./web + hostname: web1 + networks: + internal: + ipv4_address: 172.23.0.3 + mem_reservation: 512M + depends_on: + - redis + + web2: + build: ./web + hostname: web2 + networks: + internal: + ipv4_address: 172.23.0.4 + mem_reservation: 512M + depends_on: + - redis + + nginx: + image: nginx:1.25 + ports: + - '8080:80' + volumes: + - ./nginx:/etc/nginx + depends_on: + - web1 + - web2 + networks: + internal: + +networks: + internal: + ipam: + config: + - subnet: 172.23.0.1/16 +``` + +The compose file defines an application with four services `redis`, `nginx`, `web1` and `web2`. +When deploying the application, docker compose maps port 80 of the nginx service VM to port 8080 of the host as specified in the file. + +> **_INFO_** +> Redis runs on port 6379 by default. +> Make sure port 6379 on the host is not being used by another VM, otherwise the port should be changed. + +## Deploy with kraft compose + +```bash +$ sudo kraft compose up -d +nginx-nodejs-redis-redis +nginx-nodejs-redis-web1 +nginx-nodejs-redis-web2 +nginx-nodejs-redis-nginx +``` + +## Expected result + +Listing VMs must show four VMs running and the port mapping as below: + +```bash +$ sudo kraft compose ps +NAME KERNEL ARGS CREATED STATUS MEM PORTS PLAT +nginx-nodejs-redis-nginx oci://nginx:1.25 /usr/bin/nginx 2 minutes ago running 64M 0.0.0.0:8080->80/tcp qemu/x86_64 +nginx-nodejs-redis-redis oci://redis:7.2 /usr/bin/redis-server /etc/redis/redis.conf 2 minutes ago running 512M 0.0.0.0:6379->6379/tcp qemu/x86_64 +nginx-nodejs-redis-web1 oci://unikraft.org/node:21 /usr/bin/node /usr/src/server.js 2 minutes ago running 512M qemu/x86_64 +nginx-nodejs-redis-web2 oci://unikraft.org/node:21 /usr/bin/node /usr/src/server.js 2 minutes ago running 512M qemu/x86_64 +``` + +## Testing the app + +After the application starts, navigate to `http://localhost:8080` in your web browser or run: + +```bash +$ curl localhost:8080 +web1: Total number of visits is: 1 +``` + +```bash +$ curl localhost:8080 +web2: Total number of visits is: 2 +``` + +```bash +$ curl localhost:8080 +web1: Total number of visits is: 3 +``` + +## Stop and remove the VMs + +```bash +sudo kraft compose down +``` diff --git a/examples/nginx-nodejs-redis/compose.yaml b/examples/nginx-nodejs-redis/compose.yaml new file mode 100644 index 00000000..cc307061 --- /dev/null +++ b/examples/nginx-nodejs-redis/compose.yaml @@ -0,0 +1,52 @@ +services: + redis: + image: redis:7.2 + ports: + - '6379:6379' + networks: + internal: + ipv4_address: 172.23.0.2 + mem_reservation: 512M + + web1: + build: ./web + hostname: web1 + ports: + - '81:5000' + networks: + internal: + ipv4_address: 172.23.0.3 + mem_reservation: 512M + depends_on: + - redis + + web2: + build: ./web + hostname: web2 + ports: + - '82:5000' + networks: + internal: + ipv4_address: 172.23.0.4 + mem_reservation: 512M + depends_on: + - redis + + nginx: + image: nginx:1.25 + ports: + - '8080:80' + volumes: + - ./nginx:/etc/nginx + depends_on: + - web1 + - web2 + networks: + internal: + +networks: + internal: + ipam: + config: + - subnet: 172.23.0.1/16 + diff --git a/examples/nginx-nodejs-redis/nginx/nginx.conf b/examples/nginx-nodejs-redis/nginx/nginx.conf new file mode 100644 index 00000000..a4105d06 --- /dev/null +++ b/examples/nginx-nodejs-redis/nginx/nginx.conf @@ -0,0 +1,31 @@ +worker_processes 1; +daemon off; +master_process off; +user root root; + +events { + worker_connections 32; +} + +http { + error_log stderr error; + access_log off; + + keepalive_timeout 10s; + keepalive_requests 10000; + send_timeout 10s; + + upstream backend_servers { + server 172.23.0.3:5000; + server 172.23.0.4:5000; + } + + server { + listen 80; + server_name localhost; + + location / { + proxy_pass http://backend_servers; + } + } +} diff --git a/examples/nginx-nodejs-redis/web/.gitignore b/examples/nginx-nodejs-redis/web/.gitignore new file mode 100644 index 00000000..3c3629e6 --- /dev/null +++ b/examples/nginx-nodejs-redis/web/.gitignore @@ -0,0 +1 @@ +node_modules diff --git a/examples/nginx-nodejs-redis/web/Dockerfile b/examples/nginx-nodejs-redis/web/Dockerfile new file mode 100644 index 00000000..46e7cd3c --- /dev/null +++ b/examples/nginx-nodejs-redis/web/Dockerfile @@ -0,0 +1,12 @@ +FROM node:21-alpine AS build + +WORKDIR /usr/src/app + +COPY package.json package-lock.json ./ +RUN npm ci + +FROM scratch + +COPY --from=build /etc/os-release /etc/os-release +COPY --from=build /usr/src/app/node_modules /usr/src/node_modules +COPY server.js /usr/src/server.js diff --git a/examples/nginx-nodejs-redis/web/Kraftfile b/examples/nginx-nodejs-redis/web/Kraftfile new file mode 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b/examples/nginx-nodejs-redis/web/server.js new file mode 100644 index 00000000..1e9ccd46 --- /dev/null +++ b/examples/nginx-nodejs-redis/web/server.js @@ -0,0 +1,44 @@ +const os = require('os') +const express = require('express') +const app = express() +const { createClient } = require('redis') + +(async () => { + const redisClient = createClient({ + url: 'redis://172.23.0.2:6379', + socket: { + reconnectStrategy: function (retries) { + console.log(`Attempting to reconnect to Redis, attempt number: ${retries}`) + if (retries > 20) { + console.log('Too many attempts to reconnect. Redis connection was terminated') + return new Error('Too many retries.') + } else { + return retries * 500 + } + } + } + }) + + redisClient.on('error', error => { + console.error('Redis client error:', error) + }) + + await redisClient.connect() + + app.get('/', async (req, res) => { + try { + let numVisits = await redisClient.get('numVisits') + numVisits = parseInt(numVisits) || 0 + numVisits++ + await redisClient.set('numVisits', numVisits.toString()) + res.send(`${os.hostname()}: Number of visits is: ${numVisits}\n`) + } catch (err) { + console.log(err) + res.send('An error occurred') + } + }) + + app.listen(5000, function () { + console.log('Web application is listening on port 5000') + }) +})()