Feature #42008
closed
Expose default Rails health check endpoint "/up" for load balancers and uptime monitoring
Description
There is a default health check controller available since rails 7.1 (PR).
Newly generated rails apps automatically expose this at the /up route (routes.rb.tt). Add this to redmine routes.rb as well.
Exposing a dedicated health check route makes deployments in containers and behind load balancers more robust and simplifies service monitoring.
Files
Updated by Go MAEDA almost 2 years ago
- Category set to Administration
- Target version set to Candidate for next major release
Updated by Go MAEDA over 1 year ago
- Target version changed from Candidate for next major release to 6.0.4
Setting the target version to 6.0.4.
Updated by Go MAEDA over 1 year ago
- Subject changed from Expose default rails health check to Expose default Rails health check endpoint "/up" for load balancers and uptime monitoring
Updated by Go MAEDA over 1 year ago
- Status changed from New to Resolved
- Assignee set to Go MAEDA
- Resolution set to Fixed
Committed the patch in r23487.
Thank you for your contribution.
Updated by Go MAEDA over 1 year ago
- Status changed from Resolved to Closed
Merged the change into the 6.0-stable branch in r23490.
Updated by Delany Middleton over 1 year ago
Lorenz Breu is there some way to silence the logs?
Every 10 seconds its 3 extra lines
│ I, [2025-03-19T22:19:49.434437 #1] INFO -- : [29b001e9-fc72-4550-bdd2-748e155de0ea] Started HEAD "/up" for 127.0.0.1 at 2025-03-19 22:19:49 +0000 │ │ I, [2025-03-19T22:19:49.435432 #1] INFO -- : [29b001e9-fc72-4550-bdd2-748e155de0ea] Processing by Rails::HealthController#show as */* │ │ I, [2025-03-19T22:19:49.436235 #1] INFO -- : [29b001e9-fc72-4550-bdd2-748e155de0ea] Completed 200 OK in 1ms (Views: 0.3ms | ActiveRecord: 0.0ms (0 queries, 0 cached) | GC: 0.0ms) │ │ I, [2025-03-19T22:19:59.509741 #1] INFO -- : [20473365-09e2-4e80-9074-03c525c8f6ce] Started HEAD "/up" for 127.0.0.1 at 2025-03-19 22:19:59 +0000 │ │ I, [2025-03-19T22:19:59.510972 #1] INFO -- : [20473365-09e2-4e80-9074-03c525c8f6ce] Processing by Rails::HealthController#show as */* │ │ I, [2025-03-19T22:19:59.512125 #1] INFO -- : [20473365-09e2-4e80-9074-03c525c8f6ce] Completed 200 OK in 1ms (Views: 0.4ms | ActiveRecord: 0.0ms (0 queries, 0 cached) | GC: 0.0ms) │ │ I, [2025-03-19T22:20:09.589080 #1] INFO -- : [6470de22-e067-4b72-96ba-f6c7bacc9fd0] Started HEAD "/up" for 127.0.0.1 at 2025-03-19 22:20:09 +0000 │ │ I, [2025-03-19T22:20:09.590081 #1] INFO -- : [6470de22-e067-4b72-96ba-f6c7bacc9fd0] Processing by Rails::HealthController#show as */* │ │ I, [2025-03-19T22:20:09.590881 #1] INFO -- : [6470de22-e067-4b72-96ba-f6c7bacc9fd0] Completed 200 OK in 1ms (Views: 0.3ms | ActiveRecord: 0.0ms (0 queries, 0 cached) | GC: 0.0ms) │ │ I, [2025-03-19T22:20:19.665771 #1] INFO -- : [2b8759ba-54fa-4bea-96c1-6fbe7b29b1c7] Started HEAD "/up" for 127.0.0.1 at 2025-03-19 22:20:19 +0000 │ │ I, [2025-03-19T22:20:19.667103 #1] INFO -- : [2b8759ba-54fa-4bea-96c1-6fbe7b29b1c7] Processing by Rails::HealthController#show as */* │ │ I, [2025-03-19T22:20:19.668246 #1] INFO -- : [2b8759ba-54fa-4bea-96c1-6fbe7b29b1c7] Completed 200 OK in 1ms (Views: 0.4ms | ActiveRecord: 0.0ms (0 queries, 0 cached) | GC: 0.0ms) │ │ I, [2025-03-19T22:20:29.746049 #1] INFO -- : [8c019b39-2d7a-4efc-885d-9ebe952c2c83] Started HEAD "/up" for 127.0.0.1 at 2025-03-19 22:20:29 +0000 │ │ I, [2025-03-19T22:20:29.746955 #1] INFO -- : [8c019b39-2d7a-4efc-885d-9ebe952c2c83] Processing by Rails::HealthController#show as */* │ │ I, [2025-03-19T22:20:29.747738 #1] INFO -- : [8c019b39-2d7a-4efc-885d-9ebe952c2c83] Completed 200 OK in 1ms (Views: 0.3ms | ActiveRecord: 0.0ms (0 queries, 0 cached) | GC: 0.0ms) │ │ I, [2025-03-19T22:20:39.823671 #1] INFO -- : [d2579f09-c949-4956-9cbc-cb50f40c3065] Started HEAD "/up" for 127.0.0.1 at 2025-03-19 22:20:39 +0000 │ │ I, [2025-03-19T22:20:39.824705 #1] INFO -- : [d2579f09-c949-4956-9cbc-cb50f40c3065] Processing by Rails::HealthController#show as */* │ │ I, [2025-03-19T22:20:39.825525 #1] INFO -- : [d2579f09-c949-4956-9cbc-cb50f40c3065] Completed 200 OK in 1ms (Views: 0.3ms | ActiveRecord: 0.0ms (0 queries, 0 cached) | GC: 0.0ms)
I tried mounting
# app/controllers/rails/health_controller.rb
module Rails
class HealthController < ActionController::Base
def show
puts "Custom HealthController is being used!" # Debug statement
head :ok
end
# Silence logging for this action
def log_process_action(payload)
# Do nothing to prevent logging
end
end
end
and although I see the debug statement in the logs, the logs still show.
Then I tried disabling all logs
# app/controllers/rails/health_controller.rb
module Rails
class HealthController < ActionController::Base
def show
# Silence all logs for this action
Rails.logger.silence do
head :ok
end
end
end
end
but the logs still show.
Updated by Adam Heath 10 months ago
The logging happens outside the show method, so I'm not surprised that doesn't work. It definitely would be nice to have them turned off, I agree with the request. At least maybe change the level to TRACE or some such.
Updated by Holger Just 10 months ago
Rails 8 (which will be used with the upcoming Redmine 7.0) introduces a config.silence_healthcheck configuration option.
In older versions, a similar result could likely be achieve by setting a suitable log_at level for the HealthController, e.g log_at :error.
In any case though, this issue is closed. To discuss further improvements, you may open a new issue.