The script attempts to collect what images are used in current (or given namespace) and what objects reference them.
jq utility needs to be installed on machine running this command
Run this as cluster administrator or at least as a user with system:registry-viewer, run:
./image-layout.sh $NAMESPACE
The script inspects just the current namespace. Any reference outside of the namespace won't be collected/shown.
| #!/bin/bash | |
| set -euo pipefail | |
| IFS=$'\n\t' | |
| NAMESPACE=`oc project -q` | |
| if [[ "$#" -gt 0 ]]; then | |
| NAMESPACE="$1" | |
| fi | |
| oc project "${NAMESPACE}" | |
| function get_istags() { | |
| tmpl=$'{{range $isindex, $is := .items}}' | |
| tmpl+=$'{{range $tag, $value := $is.status.tags}}' | |
| tmpl+=$'{{if and ($value.items) (not $value.conditions)}}' | |
| tmpl+=$'{{range $index, $item := $value.items}}' | |
| tmpl+=$'{{$is.metadata.namespace}}/{{$is.metadata.name}}' | |
| tmpl+=$':{{$value.tag}}#{{$index}}#{{.image}}#{{.dockerImageReference}}\n{{end}}' | |
| tmpl+=$'{{end}}{{end}}{{end}}' | |
| oc get is --all-namespaces -o "go-template=${tmpl}" | |
| } | |
| tmpdir="$(mktemp -d)" | |
| function cleanup() { | |
| rm -rf "${tmpdir}" | |
| } | |
| trap cleanup EXIT | |
| oc get --all-namespaces -o json rc >"${tmpdir}/rcs.json" | |
| oc get --all-namespaces -o json pod >"${tmpdir}/pods.json" | |
| oc get --all-namespaces -o json dc >"${tmpdir}/dcs.json" | |
| oc get --all-namespaces -o json bc >"${tmpdir}/bcs.json" | |
| function make_image_refs_jq_expr() { | |
| local image="$1" | |
| printf '%s' '.items | map(select(@json | contains(' | |
| printf '"%s"' "${image}" | |
| printf '))) | ' | |
| printf '%s | ' 'map(@text "\(.metadata.namespace)/\(.metadata.name)(app=\(.metadata.labels.app),created=\(.metadata.creationTimestamp))")' | |
| printf '%s\n' 'join("#")' | |
| } | |
| function count_arr_items() { | |
| echo "$1" | tr '#' '\n' | grep -v '^\s*$' | wc -l ||: | |
| } | |
| function print_references() { | |
| local podrefs="$1" | |
| local dcrefs="$2" | |
| local rcrefs="$3" | |
| local bcrefs="$4" | |
| local titles=( "pod" "dc" "rc" "bc" ) | |
| local index=0 | |
| for refs in "${podrefs:-}" "${dcrefs:-}" "${rcrefs:-}" "${bcrefs:-}"; do | |
| echo "${refs}" | tr '#' '\n' | while read -r ref; do | |
| if [[ "${ref}" =~ (.+),created=([^\)]*) ]]; then | |
| printf " ref'd by %s %s\t-\t-\t%s\t-\t-\n" "${titles[$index]}" "${BASH_REMATCH[1]})" "${BASH_REMATCH[2]}" ||: | |
| fi | |
| done | |
| index="$((${index} + 1))" | |
| done | |
| } | |
| function sort_images() { | |
| declare -A imagetags | |
| declare -A imagecreated | |
| declare -A imagerefs | |
| declare -A imagesizes | |
| declare -A refcounts | |
| declare -A podrefs | |
| declare -A dcrefs | |
| declare -A rcrefs | |
| declare -A bcrefs | |
| while read -r -u 3 ist; do | |
| IFS='#' read -r istag index image ref <<<"${ist}" | |
| if [[ "${istag}" == "END_OF_INPUT" ]]; then | |
| { | |
| printf "ImageName\tRefCount\tSize\tCreated\tISTags\tDockerImageReference\n" | |
| while read -u 4 -r line; do | |
| img="$(echo "${line}" | cut -f 1)" | |
| echo "${line}" | |
| print_references "${podrefs[$img]:-}" "${dcrefs[$img]:-}" "${rcrefs[$img]:-}" "${bcrefs[$img]:-}" | |
| done 4< <(for img in "${!imagetags[@]}"; do | |
| tags="${imagetags[$img]##,}" | |
| if ! [[ "${tags}" =~ (^|,)${NAMESPACE}/ ]]; then | |
| continue | |
| fi | |
| size="${imagesizes[$img]}" | |
| created="${imagecreated[$img]}" | |
| refs="${imagerefs[$img]##,}" | |
| refcount="${refcounts[$img]}" | |
| printf '%s\t%s' "${img}" "${refcount}" | |
| printf '\t%s\t%s\t%s\t%s\n' "${size}" "${created}" "${tags}" "${refs}" | |
| done | sort -rnk 2) | |
| } | column -t -s $'\t' | |
| break | |
| fi | |
| tags="${imagetags[$image]:-}" | |
| if ! echo "${tags:-}" | grep -qF ",${istag}"; then | |
| imagetags[$image]="${tags},${istag}[${index}]" | |
| refcounts[$image]="$((${refcounts[$image]:-0} + 1))" | |
| fi | |
| refs="${imagerefs[$image]:-}" | |
| if [[ "${ref}" =~ ^([^@]+)(@[^@/]+|:[^/:]+)$ ]]; then | |
| ref="${BASH_REMATCH[1]}" | |
| fi | |
| if ! echo "${refs:-}" | grep -qF ",${ref}"; then | |
| imagerefs[$image]="${refs},${ref}" | |
| fi | |
| if [[ -z "${imagesizes[$image]:-}" ]]; then | |
| IFS='%' read -r size created <<<"$(oc get image -o json "${image}" | \ | |
| jq -r '@text "\(.dockerImageMetadata.Size | tostring)%\(.dockerImageMetadata.Created)"')" | |
| [[ "${size}" == 'null' ]] && size=0 | |
| imagesizes[$image]="${size}" | |
| imagecreated[$image]="${created}" | |
| refcount="${refcounts[$image]:-0}" | |
| jq_expr="$(make_image_refs_jq_expr "${image}")" | |
| podrefs[$image]="$(cat "${tmpdir}/pods.json" | jq -r "${jq_expr}")" | |
| dcrefs[$image]="$(cat "${tmpdir}/dcs.json" | jq -r "${jq_expr}")" | |
| rcrefs[$image]="$(cat "${tmpdir}/rcs.json" | jq -r "${jq_expr}")" | |
| bcrefs[$image]="$(cat "${tmpdir}/bcs.json" | jq -r "${jq_expr}")" | |
| for refs in "${podrefs[$image]}" "${dcrefs[$image]}" "${rcrefs[$image]}" "${bcrefs[$image]}"; do | |
| cnt="$(count_arr_items "${refs}")" | |
| refcount="$((${refcount} + ${cnt}))" | |
| done | |
| fi | |
| done 3< <(cat <(get_istags) <(echo "END_OF_INPUT#-#-")) | |
| } | |
| sort_images | |
| $ ./image-layout.sh test | |
| Now using project "test" on server "https://192.168.122.93:8443". | |
| ImageName RefCount Size Created ISTags DockerImageReference | |
| sha256:3c2d3a69b56f5800aedc0f60ab96f671e8bd0d43047e9611ec0634cf29ea53d8 3 140756629 2017-09-19T08:47:23Z openshift/mysql:latest[0],openshift/mysql:5.7[0],test/mysql:latest[0] centos/mysql-57-centos7 | |
| ref'd by pod test/database-1-2w4sx(app=ruby-helloworld-sample) - - 2017-09-29T11:08:36Z - - | |
| sha256:f248ca107455728a561bc260faecb08e9083ffde8cb39139122fdfd58738405a 2 208859508 2017-04-22T14:38:01Z pjoe/ose-deployer:latest[0],test/my-ose-deployer:2[0] 172.30.30.30:5000/pjoe/ose-deployer,172.30.30.30:5000/test/my-ose-deployer | |
| sha256:344ca23118d05c9724791f44ce17eddc642a9ebe7fd6145d9ce181a3edcd4b4e 2 192982120 2017-09-20T17:34:22Z openshift/ruby:2.2[0],test/ruby-22-centos7:latest[0] centos/ruby-22-centos7 | |
| ref'd by pod test/ruby-sample-build-1-build(app=null) - - 2017-09-29T11:08:31Z - - | |
| ref'd by bc test/ruby-sample-build(app=ruby-helloworld-sample) - - 2017-09-29T11:08:28Z - - |