8a41d15b69
When replacing a container currently we:
1. Boot the new container
2. Wait for it to become healthy
3. Stop the old container
Traefik will send requests to the old container until it notices that it
is unhealthy. But it may have stopped serving requests before that point
which can result in errors.
To get round that the new boot process is:
1. Create a directory with a single file on the host
2. Boot the new container, mounting the cord file into /tmp and
including a check for the file in the docker healthcheck
3. Wait for it to become healthy
4. Delete the healthcheck file ("cut the cord") for the old container
5. Wait for it to become unhealthy and give Traefik a couple of seconds
to notice
6. Stop the old container
The extra steps ensure that Traefik stops sending requests before the
old container is shutdown.
73 lines
2.8 KiB
Ruby
73 lines
2.8 KiB
Ruby
require_relative "integration_test"
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class MainTest < IntegrationTest
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test "envify, deploy, redeploy, rollback, details and audit" do
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kamal :envify
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assert_local_env_file "SECRET_TOKEN=1234"
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assert_remote_env_file "SECRET_TOKEN=1234\nCLEAR_TOKEN=4321"
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first_version = latest_app_version
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assert_app_is_down
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kamal :deploy
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assert_app_is_up version: first_version
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assert_hooks_ran "pre-connect", "pre-build", "pre-deploy", "post-deploy"
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second_version = update_app_rev
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kamal :redeploy
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assert_app_is_up version: second_version
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assert_hooks_ran "pre-connect", "pre-build", "pre-deploy", "post-deploy"
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kamal :rollback, first_version
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assert_hooks_ran "pre-connect", "pre-deploy", "post-deploy"
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assert_app_is_up version: first_version
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details = kamal :details, capture: true
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assert_match /Traefik Host: vm1/, details
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assert_match /Traefik Host: vm2/, details
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assert_match /App Host: vm1/, details
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assert_match /App Host: vm2/, details
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assert_match /traefik:v2.9/, details
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assert_match /registry:4443\/app:#{first_version}/, details
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audit = kamal :audit, capture: true
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assert_match /Booted app version #{first_version}.*Booted app version #{second_version}.*Booted app version #{first_version}.*/m, audit
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kamal :env, :delete
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assert_no_remote_env_file
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end
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test "config" do
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config = YAML.load(kamal(:config, capture: true))
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version = latest_app_version
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assert_equal [ "web" ], config[:roles]
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assert_equal [ "vm1", "vm2" ], config[:hosts]
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assert_equal "vm1", config[:primary_host]
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assert_equal version, config[:version]
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assert_equal "registry:4443/app", config[:repository]
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assert_equal "registry:4443/app:#{version}", config[:absolute_image]
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assert_equal "app-#{version}", config[:service_with_version]
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assert_equal [], config[:volume_args]
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assert_equal({ user: "root", auth_methods: [ "publickey" ], keepalive: true, keepalive_interval: 30, log_level: :fatal }, config[:ssh_options])
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assert_equal({ "multiarch" => false, "args" => { "COMMIT_SHA" => version } }, config[:builder])
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assert_equal [ "--log-opt", "max-size=\"10m\"" ], config[:logging]
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assert_equal({ "path" => "/up", "port" => 3000, "max_attempts" => 7, "exposed_port" => 3999, "cord"=>"/tmp/kamal-cord", "cmd"=>"wget -qO- http://localhost > /dev/null || exit 1" }, config[:healthcheck])
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end
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private
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def assert_local_env_file(contents)
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assert_equal contents, deployer_exec("cat .env", capture: true)
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end
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def assert_remote_env_file(contents)
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assert_equal contents, docker_compose("exec vm1 cat /root/.kamal/env/roles/app-web.env", capture: true)
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end
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def assert_no_remote_env_file
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assert_equal "nofile", docker_compose("exec vm1 stat /root/.kamal/env/roles/app-web.env 2> /dev/null || echo nofile", capture: true)
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end
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end
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