En este tutorial, le mostraré un script para instalar Docker y Docker Compose en Ubuntu 22.04.
Hoy en día, cada vez hay más aplicaciones disponibles en contenedores con Docker, regularmente tengo que instalar una nueva máquina en Ubuntu e instalar Docker y Docker Compose.
Personalmente prefiero instalar Docker desde los repositorios oficiales antes que lo que ofrece Ubuntu para tener una versión más reciente.
Al principio, iba al sitio de Docker cada vez y copiaba y pegaba líneas de código en el sitio, lo cual es bastante tedioso.
Instale Docker y Docker Compose con un script
Para ahorrar tiempo, me decidí por un script bash que se hace cargo de los comandos y aquí está:
Para usar el script, copie su contenido a un archivo en su servidor con la extensión .sh y luego ejecute el
sudo sh script-file-name.sh
El script también funciona con Ubuntu 20.04.
Verifique que Docker esté instalado
Para comprobar que la instalación está funcionando correctamente puedes ingresar estos comandos para tener las versiones de los componentes de Docker.
docker --version
Para Docker componer
docker compose version
Listas de comandos de Docker disponibles
Docker
Para acceder a los comandos de Docker, ingrese el siguiente comando:
docker
Que devuelve:
Usage: docker [OPTIONS] COMMAND A self-sufficient runtime for containers Common Commands: run Create and run a new container from an image exec Execute a command in a running container ps List containers build Build an image from a Dockerfile pull Download an image from a registry push Upload an image to a registry images List images login Log in to a registry logout Log out from a registry search Search Docker Hub for images version Show the Docker version information info Display system-wide information Management Commands: builder Manage builds buildx* Docker Buildx (Docker Inc., v0.11.2) checkpoint Manage checkpoints compose* Docker Compose (Docker Inc., v2.21.0) container Manage containers context Manage contexts image Manage images manifest Manage Docker image manifests and manifest lists network Manage networks plugin Manage plugins system Manage Docker trust Manage trust on Docker images volume Manage volumes Swarm Commands: config Manage Swarm configs node Manage Swarm nodes secret Manage Swarm secrets service Manage Swarm services stack Manage Swarm stacks swarm Manage Swarm Commands: attach Attach local standard input, output, and error streams to a running container commit Create a new image from a container's changes cp Copy files/folders between a container and the local filesystem create Create a new container diff Inspect changes to files or directories on a container's filesystem events Get real time events from the server export Export a container's filesystem as a tar archive history Show the history of an image import Import the contents from a tarball to create a filesystem image inspect Return low-level information on Docker objects kill Kill one or more running containers load Load an image from a tar archive or STDIN logs Fetch the logs of a container pause Pause all processes within one or more containers port List port mappings or a specific mapping for the container rename Rename a container restart Restart one or more containers rm Remove one or more containers rmi Remove one or more images save Save one or more images to a tar archive (streamed to STDOUT by default) start Start one or more stopped containers stats Display a live stream of container(s) resource usage statistics stop Stop one or more running containers tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE top Display the running processes of a container unpause Unpause all processes within one or more containers update Update configuration of one or more containers wait Block until one or more containers stop, then print their exit codes Global Options: --config string Location of client config files (default "/home/ubuntu/.docker") -c, --context string Name of the context to use to connect to the daemon (overrides DOCKER_HOST env var and default context set with "docker context use") -D, --debug Enable debug mode -H, --host list Daemon socket to connect to -l, --log-level string Set the logging level ("debug", "info", "warn", "error", "fatal") (default "info") --tls Use TLS; implied by --tlsverify --tlscacert string Trust certs signed only by this CA (default "/home/ubuntu/.docker/ca.pem") --tlscert string Path to TLS certificate file (default "/home/ubuntu/.docker/cert.pem") --tlskey string Path to TLS key file (default "/home/ubuntu/.docker/key.pem") --tlsverify Use TLS and verify the remote -v, --version Print version information and quit Run 'docker COMMAND --help' for more information on a command. For more help on how to use Docker, head to https://docs.docker.com/go/guides/
Docker compose
Para docker compose :
docker compose
Usage: docker compose [OPTIONS] COMMAND Define and run multi-container applications with Docker. Options: --ansi string Control when to print ANSI control characters ("never"|"always"|"auto") (default "auto") --compatibility Run compose in backward compatibility mode --dry-run Execute command in dry run mode --env-file stringArray Specify an alternate environment file. -f, --file stringArray Compose configuration files --parallel int Control max parallelism, -1 for unlimited (default -1) --profile stringArray Specify a profile to enable --progress string Set type of progress output (auto, tty, plain, quiet) (default "auto") --project-directory string Specify an alternate working directory (default: the path of the, first specified, Compose file) -p, --project-name string Project name Commands: build Build or rebuild services config Parse, resolve and render compose file in canonical format cp Copy files/folders between a service container and the local filesystem create Creates containers for a service. down Stop and remove containers, networks events Receive real time events from containers. exec Execute a command in a running container. images List images used by the created containers kill Force stop service containers. logs View output from containers ls List running compose projects pause Pause services port Print the public port for a port binding. ps List containers pull Pull service images push Push service images restart Restart service containers rm Removes stopped service containers run Run a one-off command on a service. start Start services stop Stop services top Display the running processes unpause Unpause services up Create and start containers version Show the Docker Compose version information wait Block until the first service container stops Run 'docker compose COMMAND --help' for more information on a command.
Pruebe Docker ejecutando una imagen
Para probar que Docker funciona correctamente, puede ejecutar la imagen hello-world
sudo docker run hello-world
La imagen debería devolver algo como esto:
Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world 719385e32844: Pull complete Digest: sha256:c79d06dfdfd3d3eb04cafd0dc2bacab0992ebc243e083cabe208bac4dd7759e0 Status: Downloaded newer image for hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://hub.docker.com/ For more examples and ideas, visit: https://docs.docker.com/get-started/
Si es nuevo en Docker, encontrará varios tutoriales en el sitio haciendo clic aquí