Lab #17: Run Command
Run command help to run a one-time command against a service. docker-compose run will start a new container to execute the command, not executed against a running container
Usage: docker-compose run [options] [-v VOLUME...] [-p PORT...] [-e KEY=VAL...] [-l KEY=VALUE...] SERVICE [COMMAND] [ARGS...] Options: -d, --detach Detached mode: Run container in the background, print new container name. --name NAME Assign a name to the container --entrypoint CMD Override the entrypoint of the image. -e KEY=VAL Set an environment variable (can be used multiple times) -l, --label KEY=VAL Add or override a label (can be used multiple times) -u, --user="" Run as specified username or uid --no-deps Don't start linked services. --rm Remove container after run. Ignored in detached mode. -p, --publish=[] Publish a container's port(s) to the host --service-ports Run command with the service's ports enabled and mapped to the host. --use-aliases Use the service's network aliases in the network(s) the container connects to. -v, --volume=[] Bind mount a volume (default []) -T Disable pseudo-tty allocation. By default `docker-compose run` allocates a TTY. -w, --workdir="" Working directory inside the container Pre-requisite:
Tested Infrastructure
| Platform | Number of Instance | Reading Time |
|---|---|---|
| Play with Docker | 1 | 5 min |
Pre-requisite
- Create an account with DockerHub
- Open PWD Platform on your browser
- Click on Add New Instance on the left side of the screen to bring up Alpine OS instance on the right side
Assignment
- Create a docker-compose.yml file
- Bringup the containers
Create a docker-compose.yml file
version: '3.7' services: #Nginx Service webserver: image: nginx:alpine container_name: Nginx restart: unless-stopped ports: - "80:80" - "443:443" dbserver: image: mysql:5.7 container_name: Mysqldb restart: unless-stopped ports: - "3306:3306" environment: MYSQL_ROOT_PASSWORD: Pa$$w0rd MYSQL_USER: test MYSQL_PASSWORD: Pa$$w0rd123 MYSQL_DATABASE: test volumes: - db_data:/var/lib/mysql volumes: db_data: Bringup the containers
$ docker-compose up -d Checking container status
$ docker-compose ps Name Command State Ports ---------------------------------------------------------------------------------------- Mysqldb docker-entrypoint.sh mysqld Up 0.0.0.0:3306->3306/tcp, 33060/tcp Nginx nginx -g daemon off; Up 0.0.0.0:443->443/tcp, 0.0.0.0:80->80/tcp Listout the services
$ docker-compose ps --services webserver dbserver Start webserver service container with shell
$ docker-compose run webserver /bin/sh Contributor
Next » Lab #18: Scale Command