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Cara Instal dan Menggunakan Docker di Linux

 


Docker merupakan aplikasi yang menyederhankan proses pengelolaan aplikasi di dalam kontainer. Kontainer hampir mirip dengan virtual mesin, namun lebih spesifikasi, lebih ramah sumber daya dan juga lebih bergantung pada sistem operasi.

Dalam tutorial ini kita akan membahas cara menginstal dan menggunakan docker kontainer. Hal pertama akan kita lakukan ialah melakukan update package list dan mnginstal beberapa package yang di butuhkakn.
$ sudo apt update 
$ sudo apt install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
Selanjutnya tambahkan GPG key dari repository docker.
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
Kemudian tambahkan repository docker ke dalam paket apt.
$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
Selanjutnya perbaharui package database.
$ sudo apt update
Lakukan pengecekan apakan docker yang di instal bersumber dari repository docker bukan dari repo default ubuntu.
$ apt-cache policy docker-ce
Kamu akan menemukan output seperti berikut.
$ docker-ce:
  Installed: (none)
  Candidate: 5:19.03.9~3-0~ubuntu-focal
  Version table:
     5:19.03.9~3-0~ubuntu-focal 500
        500 https://download.docker.com/linux/ubuntu focal/stable amd64 Packages
Selanjutnya instal docker engine dan docker container degan versi terbarunya.
$ sudo apt-get install docker-ce docker-ce-cli containerd.io
Terakhir jalakan perintah berikut.
$ sudo docker run hello-world
Perintah tersebut akan mendownload image baru dan menjalnkannya. Untuk meelihat command yang ada di dalamnya kamu bisa menggunakan perintah.
$ sudo docker
Outputnya seperti di bawah ini.
Options:
      --config string      Location of client config files (default "/root/.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(s) 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 "/root/.docker/ca.pem")
      --tlscert string     Path to TLS certificate file (default "/root/.docker/cert.pem")
      --tlskey string      Path to TLS key file (default "/root/.docker/key.pem")
      --tlsverify          Use TLS and verify the remote
  -v, --version            Print version information and quit
  
  Management Commands:
  builder     Manage builds
  config      Manage Docker configs
  container   Manage containers
  context     Manage contexts
  engine      Manage the docker engine
  image       Manage images
  network     Manage networks
  node        Manage Swarm nodes
  plugin      Manage plugins
  secret      Manage Docker secrets
  service     Manage services
  stack       Manage Docker stacks
  swarm       Manage Swarm
  system      Manage Docker
  trust       Manage trust on Docker images
  volume      Manage volumes
  
  Commands:
  attach      Attach local standard input, output, and error streams to a running container
  build       Build an image from a Dockerfile
  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
  exec        Run a command in a running container
  export      Export a container's filesystem as a tar archive
  history     Show the history of an image
  images      List images
  import      Import the contents from a tarball to create a filesystem image
  info        Display system-wide information
  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
  login       Log in to a Docker registry
  logout      Log out from a Docker registry
  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
  ps          List containers
  pull        Pull an image or a repository from a registry
  push        Push an image or a repository to a registry
  rename      Rename a container
  restart     Restart one or more containers
  rm          Remove one or more containers
  rmi         Remove one or more images
  run         Run a command in a new container
  save        Save one or more images to a tar archive (streamed to STDOUT by default)
  search      Search the Docker Hub for images
  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
  version     Show the Docker version information
  wait        Block until one or more containers stop, then print their exit codes
Gunakan perintah berikut untuk melihat versi docker yang telah kamu install.
$ sudo docker --version
Otuput
$ Docker version 19.03.8, build afacb8b7f0

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