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Replace Traefik with mproxy

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[mproxy](https://github.com/kevinmcconnell/mproxy) 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 8bb596e216
commit 9c4747ec0c
52 changed files with 648 additions and 912 deletions
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12
test/integration/main_test.rb
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@@ -1,6 +1,6 @@
require_relative "integration_test"
class MainTest < IntegrationTest
class IntegrationMainTest < IntegrationTest
test "envify, deploy, redeploy, rollback, details and audit" do
kamal :envify
assert_local_env_file "SECRET_TOKEN=1234"
@@ -9,7 +9,7 @@ class MainTest < IntegrationTest
first_version = latest_app_version
assert_app_is_down
assert_app_is_down response_code: "502"
kamal :deploy
assert_app_is_up version: first_version
@@ -31,11 +31,11 @@ class MainTest < IntegrationTest
assert_app_is_up version: first_version
details = kamal :details, capture: true
assert_match /Traefik Host: vm1/, details
assert_match /Traefik Host: vm2/, details
assert_match /Proxy Host: vm1/, details
assert_match /Proxy Host: vm2/, details
assert_match /App Host: vm1/, details
assert_match /App Host: vm2/, details
assert_match /traefik:v2.10/, details
assert_match /dmcbreen\/mproxy:latest/, details
assert_match /registry:4443\/app:#{first_version}/, details
audit = kamal :audit, capture: true
@@ -76,7 +76,7 @@ class MainTest < IntegrationTest
assert_equal({ user: "root", port: 22, keepalive: true, keepalive_interval: 30, log_level: :fatal }, config[:ssh_options])
assert_equal({ "multiarch" => false, "args" => { "COMMIT_SHA" => version } }, config[:builder])
assert_equal [ "--log-opt", "max-size=\"10m\"" ], config[:logging]
assert_equal({ "path" => "/up", "port" => 3000, "max_attempts" => 7, "exposed_port" => 3999, "cord"=>"/tmp/kamal-cord", "log_lines" => 50, "cmd"=>"wget -qO- http://localhost > /dev/null || exit 1" }, config[:healthcheck])
assert_equal({ "path" => "/up", "port" => 3000, "max_attempts" => 7, "exposed_port" => 3999, "log_lines" => 50, "cmd"=>"wget -qO- http://localhost > /dev/null || exit 1" }, config[:healthcheck])
end
test "setup and remove" do