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linux:docker [2019/04/03 14:09] niziak [Volumes] |
linux:docker [2020/05/07 09:05] (current) niziak |
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| + | ====== Docker ====== | ||
| * **Docker image** - operating system with preconfigured application (service) | * **Docker image** - operating system with preconfigured application (service) | ||
| Line 79: | Line 80: | ||
| * https://github.com/ClusterHQ/flocker | * https://github.com/ClusterHQ/flocker | ||
| - | ====== Volumes ====== | ||
| - | [[https://docs.docker.com/engine/tutorials/dockervolumes/]] | ||
| - | |||
| - | Data volumes are designed to persist data, independent of the container’s life cycle. Docker therefore never automatically delete volumes when you remove a container, nor will it “garbage collect” volumes that are no longer referenced by a container. | ||
| - | A Docker data volume persists after a container is deleted. | ||
| - | |||
| - | Volumes types: | ||
| - | * local storage (original image data located in specified directory are copied to volume during creation) | ||
| - | * bind-mounted host (original image data are **not copied**) | ||
| - | * volume plugins | ||
| - | |||
| - | Move volume between discs: | ||
| - | <code bash>rsync -aqxP jenkins1_jenkins_homeSNAP/ /mnt/NVMe/@jenkins1_jenkins_home</code> | ||
| - | |||
| - | ===== BTRFS Volume plugin for Docker ===== | ||
| - | [[https://github.com/anybox/buttervolume]] | ||
| - | |||
| - | |||
| - | Volume destination inside container must be a absolute path. | ||
| - | |||
| - | Run shell with mounted volume from another docker: | ||
| - | <code bash>docker run --rm -i --volumes-from dbdata busybox ash</code> | ||
| - | <code bash>docker run --rm -i --volumes-from dbdata debian:jessie-slim /bin/bash</code> | ||
| - | |||
| - | Single file can be mounted as volume: | ||
| - | <code bash>docker run --rm -it -v ~/.bash_history:/root/.bash_history debian:jessie-slim bash /bin/bash</code> | ||
| - | |||
| - | Create named volume and share it between multiple containers: | ||
| - | <code bash> | ||
| - | docker run -d -P -v my-named-volume:/opt --name test1 debian:jessie-slim bash | ||
| - | docker run -d -P -v my-named-volume:/opt --name test2 debian:jessie-slim bash | ||
| - | docker run -d -P -v my-named-volume:/opt --name test3 debian:jessie-slim bash | ||
| - | </code> | ||
| - | |||
| - | To protect data from being deleted with volume use ''local-persist'' plugin: [[https://github.com/CWSpear/local-persist]] | ||
| - | |||
| - | Find orphaned volumes | ||
| - | <code bash> | ||
| - | docker volume ls -f dangling=true | ||
| - | docker volume rm <volume name> | ||
| - | </code> | ||
| - | |||
| - | Transfer volume to another host [[https://www.guidodiepen.nl/2016/05/transfer-docker-data-volume-to-another-host/]] | ||
| - | |||
| - | [[https://github.com/gdiepen/docker-convenience-scripts/blob/master/docker_get_data_volume_info.sh]] | ||
| - | |||
| - | ====== data persistence in swarm ====== | ||
| - | [[http://mysqlrelease.com/2016/08/trying-out-mysql-in-docker-swarm-mode/]] | ||
| - | [[https://forums.docker.com/t/data-base-persistence-in-docker-swarm-mode/20665/7]] | ||
| ====== Backup ====== | ====== Backup ====== | ||