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nginx-nodejs-redis: add dev envs config

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* Add Docker Desktop Development Environments config
* Upgrade NodeJS image
* Rename `nginx` to `proxy` and use bind mount for config
  for consistency with other examples

Signed-off-by: Milas Bowman <milas.bowman@docker.com>
This commit is contained in:
Milas Bowman 2022-07-11 16:38:24 -04:00
parent 9d547d23fb
commit a6048a745a
7 changed files with 182 additions and 66 deletions
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47
nginx-nodejs-redis/.docker/docker-compose.yaml Normal file
View File

@ -0,0 +1,47 @@
services:
redis:
image: 'redislabs/redismod'
ports:
- '6379:6379'
healthcheck:
test: ["CMD", "redis-cli", "ping"]
interval: 5s
timeout: 5s
retries: 5
web1:
build:
context: web
target: dev-envs
restart: on-failure
hostname: web1
volumes:
- /var/run/docker.sock:/var/run/docker.sock
depends_on:
redis:
condition: service_healthy
web2:
build:
context: web
target: dev-envs
restart: on-failure
hostname: web2
volumes:
- /var/run/docker.sock:/var/run/docker.sock
depends_on:
redis:
condition: service_healthy
proxy:
image: nginx
volumes:
- type: bind
source: ./proxy/nginx.conf
target: /etc/nginx/conf.d/default.conf
read_only: true
ports:
- '80:80'
depends_on:
- web1
- web2

128
nginx-nodejs-redis/README.md
View File

@ -7,43 +7,62 @@ Project structure:
.
├── README.md
├── compose.yaml
├── nginx
│   ├── Dockerfile
├── proxy
│   └── nginx.conf
└── web
├── Dockerfile
├── package.json
├── package-lock.json
└── server.js
2 directories, 7 files
```
[_compose.yaml_](compose.yaml)
```
redis:
[`compose.yaml`](compose.yaml)
```yaml
services:
redis:
image: 'redislabs/redismod'
ports:
- '6379:6379'
healthcheck:
test: ["CMD", "redis-cli", "ping"]
interval: 5s
timeout: 5s
retries: 5
web1:
build:
context: web
target: builder
restart: on-failure
build: ./web
hostname: web1
ports:
- '81:5000'
web2:
restart: on-failure
build: ./web
hostname: web2
ports:
- '82:5000'
nginx:
build: ./nginx
ports:
- '80:80'
depends_on:
- web1
- web2
redis:
condition: service_healthy
web2:
build:
context: web
target: builder
restart: on-failure
hostname: web2
depends_on:
redis:
condition: service_healthy
proxy:
image: nginx
volumes:
- type: bind
source: ./proxy/nginx.conf
target: /etc/nginx/conf.d/default.conf
read_only: true
ports:
- '80:80'
depends_on:
- web1
- web2
```
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 container to port 80 of the host as specified in the file.
@ -56,53 +75,68 @@ When deploying the application, docker compose maps port 80 of the nginx service
```
$ docker compose up -d
[+] Running 24/24
⠿ redis Pulled ...
⠿ 565225d89260 Pull complete
[+] Building 2.4s (22/25)
=> [nginx-nodejs-redis_nginx internal] load build definition from Dockerfile ...
[+] Running 31/31
⠿ proxy Pulled 10.1s
⠿ redis Pulled 23.0s
[+] Building 1.1s (19/22)
=> [nginx-nodejs-redis_web1 internal] load build definition from Dockerfile 0.0s
=> [nginx-nodejs-redis_web2 internal] load build definition from Dockerfile 0.0s
...
=> [nginx-nodejs-redis_web1] exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:bb4ba7fc27bd0f7a8d572bc4ea9d0734b0f88f50a773b39028ffacd83c309c5c 0.0s
=> => naming to docker.io/library/nginx-nodejs-redis_web2 0.0s
=> => naming to docker.io/library/nginx-nodejs-redis_web1 0.0s
[+] Running 5/5
⠿ Network nginx-nodejs-redis_default Created
⠿ Container nginx-nodejs-redis-web2-1 Started
⠿ Container nginx-nodejs-redis-redis-1 Started
⠿ Container nginx-nodejs-redis-web1-1 Started
⠿ Container nginx-nodejs-redis-nginx-1 Started
⠿ Network nginx-nodejs-redis_default Created 0.0s
⠿ Container nginx-nodejs-redis-redis-1 Healthy 10.8s
⠿ Container nginx-nodejs-redis-web2-1 Started 11.2s
⠿ Container nginx-nodejs-redis-web1-1 Started 11.2s
⠿ Container nginx-nodejs-redis-proxy-1 Started 11.3s
```
## Expected result
Listing containers must show three containers running and the port mapping as below:
Listing containers should show three containers running and the port mapping as below:
```
docker-compose ps
```shell
$ docker compose ps
NAME COMMAND SERVICE STATUS PORTS
nginx-nodejs-redis-proxy-1 "/docker-entrypoint.…" proxy running 0.0.0.0:80->80/tcp
nginx-nodejs-redis-redis-1 "redis-server --load…" redis running (healthy) 0.0.0.0:6379->6379/tcp
nginx-nodejs-redis-web1-1 "docker-entrypoint.s…" web1 running
nginx-nodejs-redis-web2-1 "docker-entrypoint.s…" web2 running
```
## Testing the app
After the application starts, navigate to `http://localhost:80` in your web browser or run:
```
curl localhost:80
curl localhost:80
```shell
$ curl localhost:80
web1: Total number of visits is: 1
```
```
curl localhost:80
$ curl localhost:80
web1: Total number of visits is: 2
```
```
$ curl localhost:80
web2: Total number of visits is: 3
```
## Stop and remove the containers
```
```shell
$ docker compose down
```
## Use with Docker Development Environments
You can use this sample with the Dev Environments feature of Docker Desktop.
![Screenshot of creating a Dev Environment in Docker Desktop](../dev-envs.png)
To develop directly on the services inside containers, use the HTTPS Git url of the sample:
```
https://github.com/docker/awesome-compose/tree/master/nginx-nodejs-redis
```

40
nginx-nodejs-redis/compose.yaml
View File

@ -1,27 +1,43 @@
services:
redis:
image: 'redislabs/redismod'
ports:
- '6379:6379'
healthcheck:
test: ["CMD", "redis-cli", "ping"]
interval: 5s
timeout: 5s
retries: 5
web1:
build:
context: web
target: builder
restart: on-failure
build: ./web
hostname: web1
ports:
- '81:5000'
depends_on:
redis:
condition: service_healthy
web2:
build:
context: web
target: builder
restart: on-failure
build: ./web
hostname: web2
depends_on:
redis:
condition: service_healthy
proxy:
image: nginx
volumes:
- type: bind
source: ./proxy/nginx.conf
target: /etc/nginx/conf.d/default.conf
read_only: true
ports:
- '82:5000'
nginx:
build: ./nginx
ports:
- '80:80'
- '80:80'
depends_on:
- web1
- web2

3
nginx-nodejs-redis/nginx/Dockerfile
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@ -1,3 +0,0 @@
FROM nginx:1.21.6
RUN rm /etc/nginx/conf.d/default.conf
COPY nginx.conf /etc/nginx/conf.d/default.conf

0
nginx-nodejs-redis/nginx/nginx.conf → nginx-nodejs-redis/proxy/nginx.conf
View File

28
nginx-nodejs-redis/web/Dockerfile
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@ -1,9 +1,31 @@
FROM node:14.17.3-alpine3.14
# syntax=docker/dockerfile:1.4
FROM --platform=$BUILDPLATFORM node:18-alpine AS builder
ENV NPM_CONFIG_CACHE /npm-cache
WORKDIR /usr/src/app
COPY package.json package-lock.json ./
RUN npm ci
RUN --mount=type=cache,target=/npm-cache \
npm ci
COPY ./server.js ./
CMD ["npm","start"]
CMD ["npm", "start"]
FROM builder as dev-envs
RUN <<EOF
apk update
apk add git
EOF
RUN <<EOF
addgroup -S docker
adduser -S --shell /bin/bash --ingroup docker vscode
EOF
# install Docker tools (cli, buildx, compose)
COPY --from=gloursdocker/docker / /
CMD ["npm", "start"]

2
nginx-nodejs-redis/web/server.js
View File

@ -13,7 +13,7 @@ app.get('/', function(req, res) {
if (isNaN(numVisitsToDisplay)) {
numVisitsToDisplay = 1;
}
res.send(os.hostname() +': Number of visits is: ' + numVisitsToDisplay);
res.send(os.hostname() +': Number of visits is: ' + numVisitsToDisplay + '!!!\n');
numVisits++;
redisClient.set('numVisits', numVisits);
});