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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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28
test/cli/main_test.rb
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@@ -537,6 +537,34 @@ class CliMainTest < CliTestCase
assert_equal Kamal::VERSION, version
end
test "downgrade" do
invoke_options = { "config_file" => "test/fixtures/deploy_with_accessories.yml", "skip_hooks" => false, "confirmed" => true, "rolling" => false }
Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:traefik:downgrade", [], invoke_options)
Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:accessory:downgrade", [ "all" ], invoke_options)
run_command("downgrade", "-y", config_file: "deploy_with_accessories").tap do |output|
assert_match "Downgrading all hosts...", output
assert_match "Downgraded all hosts", output
end
end
test "downgrade rolling" do
invoke_options = { "config_file" => "test/fixtures/deploy_with_accessories.yml", "skip_hooks" => false, "confirmed" => true, "rolling" => false }
Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:traefik:downgrade", [], invoke_options).times(4)
Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:accessory:downgrade", [ "all" ], invoke_options).times(3)
run_command("downgrade", "--rolling", "-y", config_file: "deploy_with_accessories").tap do |output|
assert_match "Downgrading 1.1.1.1...", output
assert_match "Downgraded 1.1.1.1", output
assert_match "Downgrading 1.1.1.2...", output
assert_match "Downgraded 1.1.1.2", output
assert_match "Downgrading 1.1.1.3...", output
assert_match "Downgraded 1.1.1.3", output
assert_match "Downgrading 1.1.1.4...", output
assert_match "Downgraded 1.1.1.4", output
end
end
private
def run_command(*command, config_file: "deploy_simple")
stdouted { Kamal::Cli::Main.start([ *command, "-c", "test/fixtures/#{config_file}.yml" ]) }