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Redefine what the "latest" container means

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Currently the latest container is the one that was created last. But if
we have had a failed deployment that left two containers running that
would not be the one we want. The second container could be in a
restart loop for example.

Instead we want the container that is running the image tagged as
latest. As we now tag as latest after a successful deployment we can
trust that that is a healthy container.

In the case that there is no container running the latest image tag,
we'll fall back to the latest container.

This could happen if the deploy was halted in between the old container
being stopped and the image being tagged as latest.
This commit is contained in:
Donal McBreen
2024-03-28 11:21:24 +00:00
parent 55dd2f49c1
commit bade195e93
5 changed files with 75 additions and 37 deletions
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4
test/cli/main_test.rb
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@@ -250,7 +250,7 @@ class CliMainTest < CliTestCase
.with(:docker, :container, :ls, "--all", "--filter", "name=^app-#{role}-123$", "--quiet")
.returns("version-to-rollback\n").at_least_once
SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
.with(:docker, :ps, "--filter", "label=service=app", "--filter", "label=role=#{role}", "--filter", "status=running", "--filter", "status=restarting", "--latest", "--format", "\"{{.Names}}\"", "|", "while read line; do echo ${line#app-#{role}-}; done", raise_on_non_zero_exit: false)
.with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=#{role} --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=#{role} --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-#{role}-}; done", raise_on_non_zero_exit: false)
.returns("version-to-rollback\n").at_least_once
SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
.with(:docker, :container, :ls, "--all", "--filter", "name=^app-#{role}-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
@@ -286,7 +286,7 @@ class CliMainTest < CliTestCase
.with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", raise_on_non_zero_exit: false)
.returns("").at_least_once
SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
.with(:docker, :ps, "--filter", "label=service=app", "--filter", "label=role=web", "--filter", "status=running", "--filter", "status=restarting", "--latest", "--format", "\"{{.Names}}\"", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
.with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
.returns("").at_least_once
SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
.with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")