Arbeiten mit Docker-Containern
Einführung in Docker
Tim Sangster
Software Engineer @ DataCamp
Container auflisten
repl@host:/# docker ps
CONTAINER ID IMAGE .. CREATED STATUS ... NAMES
3b87ec116cb6 postgres 2 seconds ago Up 1 second ... adoring_germain
8a7830bbc787 postgres 3 seconds ago Up 2 seconds ... exciting_heisenberg
fefdf1687b39 postgres 3 seconds ago Up 2 seconds ... vigilant_swanson
b70d549d4611 postgres 4 seconds ago Up 3 seconds ... nostalgic_matsumoto
a66c71c54b92 postgres 4 seconds ago Up 4 seconds ... lucid_matsumoto
8d4f412adc3f postgres 6 seconds ago Up 5 seconds ... fervent_ramanujan
fd0b3b2a843e postgres 7 seconds ago Up 6 seconds ... cool_dijkstra
0d1951db81c4 postgres 8 seconds ago Up 7 seconds ... happy_sammet
...
Benannte Container
docker run --name <container-name> <image-name>
repl@host:/# docker run --name db_pipeline_v1 postgres
repl@host:/# docker ps
CONTAINER ID IMAGE COMMAND CREATED
43aa37614330 postgres "docker-entrypoint.s…" About a minute ago
STATUS PORTS NAMES
Up About a minute 5432/tcp db_pipeline_v1
docker stop <container-name>
repl@host:/# docker stop db_pipeline_v1
Laufender Container filtern
docker ps -f "name=<container-name>"
repl@host:/# docker ps -f "name=db_pipeline_v1"
CONTAINER ID IMAGE COMMAND CREATED
43aa37614330 postgres "docker-entrypoint.s…" About a minute ago
STATUS PORTS NAMES
Up About a minute 5432/tcp db_pipeline_v1
Container-Logs
docker logs <container-id>
repl@host:/# docker logs 43aa37614330
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.
The database cluster will be initialized with locale "en_US.utf8".
The default database encoding has accordingly been set to "UTF8".
PostgreSQL init process complete; ready for start up.
2022-10-24 12:10:40.318 UTC [1] LOG: database system is ready to accept connect..
Live-Logs
docker logs -f <container-id>
repl@host:/# docker logs -f 43aa37614330
PostgreSQL init process complete; ready for start up.
2022-10-24 12:10:40.309 UTC [1] LOG: starting PostgreSQL 14.5 (Debian 14.5-1.pg..
2022-10-24 12:10:40.309 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port ..
2022-10-24 12:10:40.309 UTC [1] LOG: listening on IPv6 address "::", port 5432
2022-10-24 12:10:40.311 UTC [1] LOG: listening on Unix socket "/var/run/postgre..
2022-10-24 12:10:40.315 UTC [62] LOG: database system was shut down at 2022-10-..
2022-10-24 12:10:40.318 UTC [1] LOG: database system is ready to accept connect..
Aufräumen
docker container rm <container-id>
repl@host:/# docker stop 43aa37614330
43aa37614330
repl@host:/# docker container rm 43aa37614330
43aa37614330
Zusammenfassung der neuen Befehle
| Verwendung | Befehl |
|---|---|
| Container mit einem Namen starten | docker run --name <container-name> <image-name> |
| Laufenden Container nach Namen filtern | docker ps -f "name=<container-name>" |
| Vorhandene Logs für Container ansehen | docker logs <container-id> |
| Live-Logs für Container ansehen | docker logs -f <container-id> |
| Live-Log-Ansicht des Containers verlassen | CTRL+C |
| Gestoppten Container entfernen | docker container rm <container-id> |
Lass uns üben!
Einführung in Docker
