Quickly find your largest docker images

Here’s a handy command to stuff into a shell alias somewhere:

docker images --format '{{.Size}} {{.Repository}} {{.Tag}} {{.ID}}' | sort --human-numeric-sort | column -t

The --format param on the docker command takes a Go template string that will print the size, name, tag and id of your images.

It then gets piped to the sort command with a switch for that understands the difference between MB and GB, and is finally then piped to a handy utility that attempts to format input as a table. Example output:

104MB redis                     latest            ef47f3b6dc11
109MB nginx                     1.15              881bd08c0b08
110MB hashicorp/terraform       0.14.4            18e46faca2ff
113MB certbot/certbot           latest            4bdc1514009b
118MB k8s.gcr.io/kube-proxy     v1.19.3           cdef7632a242
119MB k8s.gcr.io/kube-apiserver v1.19.3           a301be0cd44b
132MB nginx                     1.19.1            0901fa9da894
133MB nginx                     1.19.5            bc9a0695f571
133MB nginx                     latest            ae2feff98a0c
147MB ruby                      2.6.6-slim-buster ab543f69a598
183MB phusion/baseimage         0.11              14e6c478b00a
205MB ruby                      2.3-slim-stretch  6c82e230dca6
222MB kubernetesui/dashboard    v2.0.0            8b32422733b3
222MB ruby                      2.3-slim-jessie   4804bf5dd1e3
240MB osixia/phpldapadmin       latest            afce031a5c02
253MB k8s.gcr.io/etcd           3.4.13-0          0369cf4303ff
265MB postgres                  9.6.1             4023a747a01a
313MB postgres                  12                b97bae343e06
314MB postgres                  latest            f51c55ac75ed
372MB mysql                     5.7               ee7cbd482336
544MB mysql                     latest            0d64f46acfd1
692MB jboss/keycloak            12.0.3            eb71e4d34b56
858MB jboss/keycloak            4.5.0.Final       7874d3a082ee

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