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Maintenance mode

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Adds support for maintenance mode to Kamal.

There are two new commands:
- `kamal app maintenance` - puts the app in maintenance mode
- `kamal app live` - puts the app back in live mode

In maintenance mode, the kamal proxy will respond to requests with a
503 status code. It will use an error page built into kamal proxy.

You can use your own error page by setting `error_pages_path` in the
configuration. This will copy any 4xx.html or 5xx.html files from that
page to a volume mounted into the proxy container.
This commit is contained in:
Donal McBreen
2025-04-16 12:21:47 +01:00
parent 26b6c072f3
commit 354530f3b8
22 changed files with 319 additions and 30 deletions
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9
test/configuration_test.rb
View File

@@ -395,4 +395,13 @@ class ConfigurationTest < ActiveSupport::TestCase
assert_equal "Different roles can't share the same host for SSL: foo.example.com", exception.message
end
test "proxy directories" do
assert_equal ".kamal/proxy/apps-config", @config.proxy_apps_directory
assert_equal "/home/kamal-proxy/.apps-config", @config.proxy_apps_container_directory
assert_equal ".kamal/proxy/apps-config/app", @config.proxy_app_directory
assert_equal "/home/kamal-proxy/.apps-config/app", @config.proxy_app_container_directory
assert_equal ".kamal/proxy/apps-config/app/error_pages", @config.proxy_error_pages_directory
assert_equal "/home/kamal-proxy/.apps-config/app/error_pages", @config.proxy_error_pages_container_directory
end
end