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Backer volume plugin

License: MIT License

Dockerfile 3.07% JavaScript 90.82% Makefile 6.11%

docker restic volume-plugin

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A few questions

Plugin looks like what I have been looking for. I just had the following questions

Why does it use filesystem in a single file? What is the benefits over just using a normal folder that gets bind mounted into the container?
If you specify say a 5gb volume will the file take up all 5gb even if the data uses say 5mb?
Is there a way to make one that can expand as much as it needs to instead of being fixed size?
What happens if your volume uses all its allocated space? I assume you get an out of space error but I thought to check.
Can you set it to auto backup when a volume is no longer in use or will be destroyed.
If 5 above is possible can it be made to restore it automatically if the volume does not exist on volume create if there is a backup for it.

This seems perfect for my use case of backups as well as move volumes between hosts.

bug with restore

if you try to restore when the repository does not exist yet then the volume mounts but "Options" on the mount is null.

 docker volume inspect radarr_config 
[
    {
        "CreatedAt": "0001-01-01T00:00:00Z",
        "Driver": "srgl/backer:latest",
        "Labels": null,
        "Mountpoint": "/mnt/volumes/radarr_config/_data",
        "Name": "radarr_config",
        "Options": null,
        "Scope": "local",
        "Status": {
            "mounted": true
        }
    }
]

volume driver errors creating volume

setup just following readme but volumes done work. error from syslog for create and mount of volume from docker compose

seer@portable:/sm/temp/backup$ tail -n 1050 /var/log/syslog | grep docker
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Get, {\"Name\":\"backup_testing\"}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="Error processing action VolumeDriver.Get: Error: Volume backup_testing doesn't exist" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at /app/src/plugin.js:166:26" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at /app/node_modules/async-lock/lib/index.js:125:12" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at AsyncLock._promiseTry (/app/node_modules/async-lock/lib/index.js:249:31)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at exec (/app/node_modules/async-lock/lib/index.js:124:9)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at AsyncLock.acquire (/app/node_modules/async-lock/lib/index.js:140:3)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at Plugin.get (/app/src/plugin.js:164:22)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at Plugin.handler (/app/src/plugin.js:44:38)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at processTicksAndRejections (internal/process/task_queues.js:89:5)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Capabilities, {}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Get, {\"Name\":\"backup_testing\"}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="Error processing action VolumeDriver.Get: Error: Volume backup_testing doesn't exist" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at /app/src/plugin.js:166:26" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at /app/node_modules/async-lock/lib/index.js:125:12" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at AsyncLock._promiseTry (/app/node_modules/async-lock/lib/index.js:249:31)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at exec (/app/node_modules/async-lock/lib/index.js:124:9)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at AsyncLock.acquire (/app/node_modules/async-lock/lib/index.js:140:3)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at Plugin.get (/app/src/plugin.js:164:22)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at Plugin.handler (/app/src/plugin.js:44:38)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=error msg="    at processTicksAndRejections (internal/process/task_queues.js:89:5)" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Create, {\"Name\":\"backup_testing\",\"Opts\":{\"backup_schedule\":\"0 1 * * *\",\"env_B2_ACCOUNT_ID\":\"xxx\",\"env_B2_ACCOUNT_KEY\":\"xxx\",\"env_restic_password\":\"testing\",\"env_restic_repository\":\"b2:xxx:/download\",\"forget_policy\":\"l7 w30\",\"forget_schedule\":\"0 1 * * 0\",\"restore\":\"n\",\"size\":\"25M\"}}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Capabilities, {}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Get, {\"Name\":\"backup_testing\"}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Capabilities, {}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Get, {\"Name\":\"backup_testing\"}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Capabilities, {}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823
Nov 18 05:59:51 portable dockerd[1836]: time="2019-11-18T05:59:51+11:00" level=info msg="Action VolumeDriver.Mount, {\"Name\":\"backup_testing\",\"ID\":\"a00373f0f0209c560670a8fd3c3ae23f4485b08813a6e2c2852baf3c3b9a68c2\"}" plugin=acbc33eba7ead383228238fcdfdf88456a07b3de07f2fce92bc8592128d70823

I created a volume using docker compose but the container played up like it had an issue with it ans when i tried to go to the mount point it does not exist. Is there a log or something i can use the find the issue?

docker volume inspect temp_muximux_config 
[
    {
        "CreatedAt": "0001-01-01T00:00:00Z",
        "Driver": "srgl/backer:latest",
        "Labels": {
            "com.docker.compose.project": "temp",
            "com.docker.compose.volume": "muximux_config"
        },
        "Mountpoint": "/mnt/volumes/temp_muximux_config/_data",
        "Name": "temp_muximux_config",
        "Options": {
            "backup_schedule": "0 1 * * *",
            "env_B2_ACCOUNT_ID": "xxxxxx",
            "env_B2_ACCOUNT_KEY": "xxxxxxx",
            "env_restic_password": "xxxxxxx",
            "env_restic_repository": "b2:xxxxxxx:/muximux_config",
            "forget_policy": "l7 w30",
            "forget_schedule": "0 1 * * 0",
            "restore": "y",
            "size": "25M"
        },
        "Scope": "local",
        "Status": {
            "mounted": true
        }
    }

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