CODEWITHSUNDEEP
bashdocker
drmrbrewer
drmrbrewer

Reputation: 12999

Docker command line to show NodeID ContainerID and Hostname for all containers in swarm for a particular service

I'm looking for a single-line command to find all of NodeID, ContainerID and Hostname for all containers in a docker swarm that relate to service srv-myservice.

I've got as far as collecting the first two bits of info (NodeID, ContainerID) using docker service ls:

# SRV=srv-myservice; for f in $(docker service ps -q ${SRV} -f desired-state=running); do docker inspect --format 'NodeID: {{.NodeID}}, ContainerID: {{.Status.ContainerStatus.ContainerID}}' $f; done
NodeID: p49jhk0wliix4857u9pajbqlr, ContainerID: 41c1b5d4cfd899d96f0ca78e798636a6d4c7ea11002b69eee7bb0a78858c1c7e

And the last bit of info (Hostname) from docker node ls, along with NodeID to provide a link to the above:

# docker node ls --format 'NodeID: {{.ID}}, Hostname: {{.Hostname}}'
NodeID: p49jhk0wliix4857u9pajbqlr, Hostname: myserver-01
NodeID: 1cd89df9c89cb8477b3050ced, Hostname: myserver-02

I can then manually get the Hostname from the matching NodeID and put it together with the other info to get what I want:

Hostname: myserver-01, NodeID: p49jhk0wliix4857u9pajbqlr, ContainerID: 41c1b5d4cfd899d96f0ca78e798636a6d4c7ea11002b69eee7bb0a78858c1c7e

... but my abilities to merge these two steps into a single command-line statement are slightly lacking.

Upvotes: 0

Views: 439

Answers (1)

Raman Sailopal
Raman Sailopal

Reputation: 12877

You can use Awk for this:

awk 'NR==FNR { map[$2]=$4;next } { print "Hostname: "map[$2]", "$0 } ' <(docker node ls --format 'NodeID: {{.ID}}, Hostname: {{.Hostname}}') <(for f in $(docker service ps -q ${SRV} -f desired-state=running); do docker inspect --format 'NodeID: {{.NodeID}}, ContainerID: {{.Status.ContainerStatus.ContainerID}}' $f; done)

Explantion:

 awk 'NR==FNR { 
                map[$2]=$4;                           # Process the first output (NR==FNR) - Set up an array map with the node id as the index and the host name as the value
                next ;                                # Skip to the next record
             } 
             { 
                print "Hostname: "map[$2]", "$0       # Process the second output, print the hostname from the map array along with the rest of the line
             } ' <(docker node ls --format 'NodeID: {{.ID}}, Hostname: {{.Hostname}}') <(for f in $(docker service ps -q ${SRV} -f desired-state=running); do docker inspect --format 'NodeID: {{.NodeID}}, ContainerID: {{.Status.ContainerStatus.ContainerID}}' $f; done)

Upvotes: 1

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