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Replace Traefik with parachute

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[mproxy](https://github.com/basecamp/parachute) is a custom minimal
proxy designed specifically for Kamal.

It has two big advantages over Traefik:
1. Imperative deployments - we tell it to switch from container A to
   container B, and it waits for container B to start then switches. No
   need to poll for health checks ourselves or mess around with forcing
   health checks to fail.
2. Support for multiple apps - as much as possible, configuration is
   supplied at runtime by the deploy command, allowing us to have
   multiple apps share an instance of mproxy without conflicting config.
This commit is contained in:
Donal McBreen
2024-03-08 08:19:48 +00:00
parent 10b8c826d8
commit 822590dcf6
66 changed files with 754 additions and 1161 deletions
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25
test/configuration_test.rb
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@@ -74,22 +74,22 @@ class ConfigurationTest < ActiveSupport::TestCase
assert_equal "1.1.1.1", @config_with_roles.primary_host
end
test "traefik hosts" do
assert_equal [ "1.1.1.1", "1.1.1.2" ], @config_with_roles.traefik_hosts
test "proxy hosts" do
assert_equal [ "1.1.1.1", "1.1.1.2" ], @config_with_roles.proxy_hosts
@deploy_with_roles[:servers]["workers"]["traefik"] = true
@deploy_with_roles[:servers]["workers"]["proxy"] = true
config = Kamal::Configuration.new(@deploy_with_roles)
assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3" ], config.traefik_hosts
assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3" ], config.proxy_hosts
end
test "filtered traefik hosts" do
assert_equal [ "1.1.1.1", "1.1.1.2" ], @config_with_roles.traefik_hosts
test "filtered proxy hosts" do
assert_equal [ "1.1.1.1", "1.1.1.2" ], @config_with_roles.proxy_hosts
@deploy_with_roles[:servers]["workers"]["traefik"] = true
@deploy_with_roles[:servers]["workers"]["proxy"] = true
config = Kamal::Configuration.new(@deploy_with_roles)
assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3" ], config.traefik_hosts
assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3" ], config.proxy_hosts
end
test "version no git repo" do
@@ -154,10 +154,6 @@ class ConfigurationTest < ActiveSupport::TestCase
assert_equal "app-missing", @config.service_with_version
end
test "healthcheck service" do
assert_equal "healthcheck-app", @config.healthcheck_service
end
test "valid config" do
assert @config.valid?
assert @config_with_roles.valid?
@@ -271,8 +267,7 @@ class ConfigurationTest < ActiveSupport::TestCase
sshkit: {},
volume_args: [ "--volume", "/local/path:/container/path" ],
builder: {},
logging: [ "--log-opt", "max-size=\"10m\"" ],
healthcheck: { "path"=>"/up", "port"=>3000, "max_attempts" => 7, "cord" => "/tmp/kamal-cord", "log_lines" => 50 } }
logging: [ "--log-opt", "max-size=\"10m\"" ] }
assert_equal expected_config, @config.to_h
end
@@ -330,7 +325,7 @@ class ConfigurationTest < ActiveSupport::TestCase
assert_equal "alternate_web", config.primary_role.name
assert_equal "1.1.1.4", config.primary_host
assert config.role(:alternate_web).primary?
assert config.role(:alternate_web).running_traefik?
assert config.role(:alternate_web).running_proxy?
end
test "primary role missing" do