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Minimise holding the deploy lock

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If we get an error we'll only hold the deploy lock if it occurs while
trying to switch the running containers.

We'll also move tagging the latest image from when the image is pulled
to just before the container switch. This ensures that earlier errors
don't leave the hosts with an updated latest tag while still running the
older version.
This commit is contained in:
Donal McBreen
2023-04-12 09:37:20 +01:00
parent 60a19f0b30
commit 051556674f
10 changed files with 124 additions and 54 deletions
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27
lib/mrsk/cli/app.rb
View File

@@ -8,25 +8,28 @@ class Mrsk::Cli::App < Mrsk::Cli::Base
cli = self
on(MRSK.hosts) do
execute *MRSK.auditor.record("Tagging #{MRSK.config.absolute_image} as the latest image"), verbosity: :debug
execute *MRSK.app.tag_current_as_latest
end
on(MRSK.hosts) do |host|
roles = MRSK.roles_on(host)
roles.each do |role|
execute *MRSK.auditor(role: role).record("Booted app version #{version}"), verbosity: :debug
begin
if capture_with_info(*MRSK.app(role: role).container_id_for_version(version)).present?
tmp_version = "#{version}_#{SecureRandom.hex(8)}"
info "Renaming container #{version} to #{tmp_version} as already deployed on #{host}"
execute *MRSK.auditor(role: role).record("Renaming container #{version} to #{tmp_version}"), verbosity: :debug
execute *MRSK.app(role: role).rename_container(version: version, new_version: tmp_version)
end
old_version = capture_with_info(*MRSK.app(role: role).current_running_version).strip
execute *MRSK.app(role: role).run
sleep MRSK.config.readiness_delay
execute *MRSK.app(role: role).stop(version: old_version), raise_on_non_zero_exit: false if old_version.present?
if capture_with_info(*MRSK.app(role: role).container_id_for_version(version)).present?
tmp_version = "#{version}_#{SecureRandom.hex(8)}"
info "Renaming container #{version} to #{tmp_version} as already deployed on #{host}"
execute *MRSK.auditor(role: role).record("Renaming container #{version} to #{tmp_version}"), verbosity: :debug
execute *MRSK.app(role: role).rename_container(version: version, new_version: tmp_version)
end
old_version = capture_with_info(*MRSK.app(role: role).current_running_version).strip
execute *MRSK.app(role: role).run
sleep MRSK.config.readiness_delay
execute *MRSK.app(role: role).stop(version: old_version), raise_on_non_zero_exit: false if old_version.present?
end
end
end