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| docker_notes:docker [2024-01-14 Sun wk02 12:04] – [DNS and nftable / iptables / netfilter within containers] baumkp | docker_notes:docker [2024-04-01 Mon wk14 13:26] (current) – baumkp |
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| {{tag>linux docker cli installation network volume iptables nftables portainer}} | {{tag>linux docker cli installation network volume iptables nftables portainer}} |
| Much of this material was originally sourced from: [[https://github.com/xcad2k/cheat-sheets/blob/main/docker/docker.md|xcad2k cheat-sheets/docker/docker.md]] | Much of this material was originally sourced from: [[https://github.com/ChristianLempa/cheat-sheets/blob/main/docker/docker.md|cheat-sheets/docker/docker.md]] |
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| |''docker volume prune'' | Delete all volumes (not referenced by any container)| | |''docker volume prune'' | Delete all volumes (not referenced by any container)| |
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| | ====docker ps command==== |
| | The ''docker ps'' command output is long and often difficult to read on the terminal for this reason. |
| | *''%%docker ps --format 'table {{ .ID }}\t{{.Image}}\t{{ .Names }}'%%'' |
| | <code>CONTAINER ID IMAGE NAMES</code> |
| | *''%%docker ps -s --format 'table {{ .ID }}\t{{.Status}}\t{{.Image}}\t{{ .Names }}'%%'' |
| | <code>CONTAINER ID STATUS IMAGE NAMES</code> |
| | *''%%docker ps -s --format 'table {{ .ID }}\t{{.Status}}\t{{.Image}}\t{{ .Names }}\t{{.Size}}'%%'' |
| | <code>CONTAINER ID STATUS IMAGE NAMES SIZE</code> |
| | |
| | ===reference=== |
| | *[[https://devdojo.com/bobbyiliev/how-to-change-the-docker-ps-output-format|How to change the docker ps output format]] |
| | *Docker Docs |
| | *[[https://docs.docker.com/reference/cli/docker/container/ls/|docker container ls]] |
| | *[[https://docs.docker.com/storage/storagedriver/#container-size-on-disk|Container size on disk]] |
| ====Backup a container==== | ====Backup a container==== |
| Backup docker data from inside container volumes and package it in a tarball archive.\\ | Backup docker data from inside container volumes and package it in a tarball archive.\\ |
| - Overlay network, an even more obscure network arrangement I know nothing about. | - Overlay network, an even more obscure network arrangement I know nothing about. |
| - None network - no assigned network, container has no external network connectivity | - None network - no assigned network, container has no external network connectivity |
| | |
| | ====network troubleshooting==== |
| | A lot of containers are setup to be small and hence do not include many, if any of the tools required to diagnose problems. A small docker image ''netshoot'' includes the most common networking tools and when attached to the same docker network can be used to diagnose the network and containers networks thereon. |
| | *''%%docker run --rm --name netshoot --network proxy -it nicolaka/netshoot /bin/bash%%'' |
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| ====Troubleshooting==== | ====Troubleshooting==== |
| *[[https://github.com/nicolaka/netshoot|netshoot: a Docker + Kubernetes network trouble-shooting swiss-army container]] ''%%docker run --name netshoot --rm -it nicolaka/netshoot /bin/bash%%'' | *[[https://github.com/nicolaka/netshoot|netshoot: a Docker + Kubernetes network trouble-shooting swiss-army container]] ''%%docker run --name netshoot --rm -it nicolaka/netshoot /bin/bash%%'' |