The script ./tools/scripts/check.sh can check if app folders in the root of the repository have corresponding images in the GCR registry.
Example output:
❯ direnv exec infra/elastic-obs-integrations-dev/ ./tools/scripts/check.sh
direnv: loading ~/code/github.com/elastic/elastic-agent-gcp-kubernetes-app/infra/elastic-obs-integrations-dev/.envrc
Checking images in GCP project: elastic-obs-integrations-dev
ELASTIC_AGENT_VERSION not set, checking all found versions
8.1.0 agent : 6c95b9553c81 8.1.0 2022-05-09T17:35:42
8.1.0 deployer: 7f61726b0f3e 8.1.0 2022-05-09T16:23:38
8.1.1 agent : f25d473e0c9e 8.1.1 2022-05-09T16:29:40
8.1.1 deployer: c7d8c42192d0 8.1.1 2022-05-09T16:23:59
8.1.2 agent : 067086d78c07 8.1.2 2022-05-09T16:29:43
8.1.2 deployer: 98515add6dba 8.1.2 2022-05-09T16:30:03
8.1.3 agent : c1c489ea68a8 8.1,8.1.3 2022-05-09T16:29:46
8.1.3 deployer: 44dab3bb2aab 8.1,8.1.3 2022-05-11T17:46:30
Images from 8.1.0 to 8.1.3 are listed, both app image and deployer image. For each the container digest, tags and creation date are printed.
Note the 8.1 tag attached to 8.1.3, to signal the latest version for the release track.