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I am writing a bash script and I am aware that I can get information of the mounts attached to a container using docker inspect --format '{{.Mounts}}' <container-name> which gives a result such as this:

[{volume portainer-data /docker/portainer/data /data local-persist rw true } {bind /var/run/docker.sock /var/run/docker.sock rw true rprivate}]

which is an abbreviated version of the full JSON:

 "Mounts": [ { "Type": "volume", "Name": "portainer-data", "Source": "/docker/portainer/data", "Destination": "/data", "Driver": "local-persist", "Mode": "rw", "RW": true, "Propagation": "" }, { "Type": "bind", "Source": "/var/run/docker.sock", "Destination": "/var/run/docker.sock", "Mode": "rw", "RW": true, "Propagation": "rprivate" } ],

How can I get that information so that I could check the Type and then use the Name (or any of the other values)?

I've tried docker inspect --format '{{.Mounts}}{{.Type}}' but it doesn't work however a similar command docker ps --format '{{.ID}}: {{ .Mounts }}' prints the container name and the mounts.

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So, if anything, {{Mounts.Type}} should work. If it doesn't, jq is your friend an can work with JSON documents directly, e.g.,

docker inspect container-name \ | jq \ '.[] | { "container": .Name, "mount": .Mounts.[] | {"source": .Source, "target": .Destination, "type": .Type} } '

should give you a sequence of JSON objects, each like

{ "container": "mycoolcontaier", "mount": { "source": "/home/marcus/data", "target": "/data", "type": "bind" } }

so that I could check the Type and then use the Name

that sounds like you need some kind of string parsing to do that looking-for-types, and jq can absorb that!

docker inspect container-name \ | jq \ '.[] | { "container": .Name, "mount": .Mounts.[] | {"source": .Source, "target": .Destination, "type": .Type} } | select(.mount.type == "bind") '

gives you only the bind-type mounts.

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  • Running docker inspect --format '{{Mounts.Type}}' container-name gives me back this error: template parsing error: template: :1: function "Mounts" not defined. I did think of jq but was hoping it would be simpler. I will dig into that, thanks. Commented Sep 29 at 12:31

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