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Downgrade from Kamal 2 to 1.9

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Add a downgrade command, so you can reverse the upgrade process and go
back to Kamal 1.9. This replaces kamal-proxy and reboots all the
accessories.

This gives an upgrade and downgrade path:

Upgrade:
1. Upgrade config to be Kamal 2 compatible + use kamal 2.0
2. Run `kamal upgrade`

Downgrade:
1. Switch back to previous config + use kamal 1.9
2. Run `kamal downgrade`

You can set `--rolling` to downgrade one host at a time.
This commit is contained in:
Donal McBreen
2024-09-17 18:55:52 +01:00
parent 80bd46cde3
commit 7c7785c1eb
10 changed files with 241 additions and 1 deletions
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18
test/cli/accessory_test.rb
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@@ -209,6 +209,24 @@ class CliAccessoryTest < CliTestCase
end
end
test "downgrade" do
run_command("downgrade", "-y", "all").tap do |output|
assert_match "Downgrading all accessories on 1.1.1.3,1.1.1.1,1.1.1.2...", output
assert_match "docker container stop app-mysql on 1.1.1.3", output
assert_match "docker run --name app-mysql --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 3306:3306 --env-file .kamal/env/accessories/app-mysql.env --env MYSQL_ROOT_HOST=\"%\" --volume $PWD/app-mysql/etc/mysql/my.cnf:/etc/mysql/my.cnf --volume $PWD/app-mysql/data:/var/lib/mysql --label service=\"app-mysql\" mysql:5.7 on 1.1.1.3", output
assert_match "Downgraded all accessories on 1.1.1.3,1.1.1.1,1.1.1.2", output
end
end
test "downgrade rolling" do
run_command("downgrade", "--rolling", "-y", "all").tap do |output|
assert_match "Downgrading all accessories on 1.1.1.3...", output
assert_match "docker container stop app-mysql on 1.1.1.3", output
assert_match "docker run --name app-mysql --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 3306:3306 --env-file .kamal/env/accessories/app-mysql.env --env MYSQL_ROOT_HOST=\"%\" --volume $PWD/app-mysql/etc/mysql/my.cnf:/etc/mysql/my.cnf --volume $PWD/app-mysql/data:/var/lib/mysql --label service=\"app-mysql\" mysql:5.7 on 1.1.1.3", output
assert_match "Downgraded all accessories on 1.1.1.3", output
end
end
private
def run_command(*command)
stdouted { Kamal::Cli::Accessory.start([ *command, "-c", "test/fixtures/deploy_with_accessories.yml" ]) }