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title: 1. Erste Schritte | ||
sidebar_position: 2 | ||
--- | ||
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# Erste Schritte | ||
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## Die Kommandozeile | ||
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Mit Docker installiert und funktionsfähig, ist jetzt der richtige Zeitpunkt, dich mit der Befehlszeilenanwendung vertraut zu machen. Die Verwendung von Docker besteht darin, mindestens einen Befehl zu verwenden. `docker --help` zeigt die verfügbaren Optionen. | ||
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```bash | ||
docker --help | ||
``` | ||
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``` | ||
Usage: docker COMMAND | ||
A self-sufficient runtime for containers | ||
Options: | ||
--config string Location of client config files (default "/home/user/.docker") | ||
-D, --debug Enable debug mode | ||
--help Print usage | ||
-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 "/home/user/.docker/ca.pem") | ||
--tlscert string Path to TLS certificate file (default "/home/user/.docker/cert.pem") | ||
--tlskey string Path to TLS key file (default "/home/user/.docker/key.pem") | ||
--tlsverify Use TLS and verify the remote | ||
-v, --version Print version information and quit | ||
Management Commands: | ||
config Manage Docker configs | ||
container Manage containers | ||
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 | ||
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 | ||
Run 'docker COMMAND --help' for more information on a command. | ||
``` | ||
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Um die für einen spezifischen Befehl verfügbaren Schalter zu sehen, tippe: | ||
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```bash | ||
docker <command> --help | ||
``` | ||
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Um systemweite Informationen über Docker zu sehen, benutze: | ||
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```bash | ||
docker info | ||
``` | ||
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## Hello World (mit Docker) | ||
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Docker-Container werden aus Docker-Images ausgeführt. Standardmäßig ziehen sie diese Images von Docker Hub, einer Docker-Registry, die von Docker Inc, dem Unternehmen hinter dem Docker-Projekt, verwaltet wird. Jeder kann seine Docker-Images auf Docker Hub erstellen und hosten, daher findest du für viele Anwendungen und Linux-Distributionen Docker-Images, die auf Docker Hub gehostet werden. | ||
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Um zu überprüfen, ob du auf Docker Hub zugreifen und Images herunterladen kannst, tippe: | ||
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```bash | ||
docker run hello-world | ||
``` | ||
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Die Ausgabe, die Folgendes beinhalten sollte, deutet darauf hin, dass Docker korrekt zu funktionieren scheint: | ||
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``` | ||
Hello from Docker. | ||
This message shows that your installation appears to be working correctly. | ||
... | ||
``` | ||
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## Dein erster Container 🎉 | ||
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Mit diesem Befehl haben wir gerade unseren ersten Container auf unserem Computer ausgeführt. Er führte einen einfachen Prozess aus, der eine Nachricht auf der Standardausgabe ausgab, der Container selbst ist jedoch nicht sehr nützlich. | ||
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# Docker Dokumentation | ||
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Besuche https://docs.docker.com und mache dich mit den Dokumentationen sowie den Referenzen vertraut. In diesem Training verwenden wir Docker CE, daher könnte es auch sinnvoll sein, diesen Abschnitt in der Dokumentation zu überprüfen. | ||
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<details> | ||
<summary>Frage: Muss ich den Namen des Docker Images auswendig kennen?</summary> | ||
<p> | ||
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Nein! Es gibt Unmengen von **Images**, die von Unternehmen, Open-Source-Projekten und Einzelpersonen bereitgestellt werden. Du kannst diese Images in verschiedenen Registries suchen, einige der bekannteren sind [Docker Hub](https://hub.docker.com) und [Github Container Registry](https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry). Sieh dir das nächste Lab für weitere Details an. | ||
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</p> | ||
</details> |
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