I would like to run one and the same project twice on the same server. So I defined two environments alpha and beta for this purpose.
alpha should run on port 3000
beta should run on port 4000
Then I try to start the server twice:
$ ruby bin/rails server -b 0.0.0.0 -p 3000 -e alpha --pid tmp/pids/server-alpha.pid
$ ruby bin/rails server -b 0.0.0.0 -p 4000 -e beta --pid tmp/pids/server-beta.pid
Unfortunately one of those servers (the second to start) stops when it recognizes, that there is another instance.
Environment alpha starts:
=> Booting Puma
=> Rails 5.0.0.1 application starting in alpha on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.6.0 (ruby 2.3.1-p112), codename: Sleepy Sunday Serenity
* Min threads: 5, max threads: 5
* Environment: alpha
* Listening on tcp://0.0.0.0:3000
Use Ctrl-C to stop
Environment beta starts:
=> Booting Puma
=> Rails 5.0.0.1 application starting in beta on http://0.0.0.0:4000
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.6.0 (ruby 2.3.1-p112), codename: Sleepy Sunday Serenity
* Min threads: 5, max threads: 5
* Environment: beta
* Listening on tcp://0.0.0.0:4000
Use Ctrl-C to stop
Environment alpha restarts (don't know why!):
* Restarting...
=> Booting Puma
=> Rails 5.0.0.1 application starting in alpha on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
A server is already running. Check tmp/pids/server-alpha.pid.
Exiting
Obviously the pid file still exists. But how can I avoid a restart of the server when I start another one? How can I tell rails to delete the pidfile on restart? Or how else could I handle this problem?
You probable have plugin :tmp_restart in your config/puma.rb. Everytime tmp/restart.txt is touched (which is everytime a server starts), the other server restarts.
Just comment the line and it works (you won't be able to restart your rails server by touching tmp/restart.txt anymore).
I'm not sure this will work but try using = after --pid like this
$ ruby bin/rails server -b 0.0.0.0 -p 3000 -e alpha --pid=tmp/pids/server-alpha.pid
$ ruby bin/rails server -b 0.0.0.0 -p 4000 -e beta --pid=tmp/pids/server-beta.pid
Related
I'm new to Heroku and despite all the documentation, I'm a little unsure what the profile is for. I can set a port and the environment as follows, but Heroku always starts in production mode (which makes sense) and not with the specified port.
I suppose that the port cannot be set because it is determined by Heroku?
Is the Procfile only for the command "heroku local" to test?
Because when I run "heroku ps" I get info about the procfile, but the API runs without the procfile port in production mode.
Thank you for any explanation!
Procfile:
web: bundle exec puma -t 5:5 -p ${PORT:-3000} -e ${RACK_ENV:-development}
Output of heroku ps after deploying:
=== web (Hobby): bundle exec puma -t 5:5 -p ${PORT:-3000} -e ${RACK_ENV:-development} (1)
web.1: up 2020/07/27 13:50:23 +0200 (~ 1m ago)
Output of heroku logs at the same time:
Version 3.12.6 (ruby 2.5.8-p224), codename: Llamas in Pajamas
2020-07-27T11:49:32.219309+00:00 app[web.1]: * Min threads: 5, max threads: 5
2020-07-27T11:49:32.219309+00:00 app[web.1]: * Environment: production
2020-07-27T11:49:33.740321+00:00 app[web.1]: * Listening on tcp://0.0.0.0:10269
Heroku will set both $PORT and $RACK_ENV for Rails apps when they're deployed. You can confirm this by running heroku config --app <yourapp>. The construct ${PORT:-3000} means "use the PORT variable if it's present, otherwise use the value 3000.
In any case, you can't run a Heroku app on a port other than the one defined in $PORT, which is randomized for each dyno. Whatever that's set to will be forwarded to from ports 80 and 443 for HTTP/S.
If you want to override the RACK_ENV, you can run heroku config:set RACK_ENV=development.
I want to start the rails server in production mode as a deamon running a worker cluster. When I start my rails program everything works as expected.
rails s -e production -b 0.0.0.0
=> Booting Puma
=> Rails 5.0.0.1 application starting in production on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
[12340] Puma starting in cluster mode...
[12340] * Version 3.4.0 (ruby 2.3.0-p0), codename: Owl Bowl Brawl
[12340] * Min threads: 5, max threads: 5
[12340] * Environment: production
[12340] * Process workers: 3
[12340] * Preloading application
[12340] * Listening on tcp://0.0.0.0:3000
[12340] Use Ctrl-C to stop
[12340] - Worker 0 (pid: 12347) booted, phase: 0
[12340] - Worker 1 (pid: 12349) booted, phase: 0
[12340] - Worker 2 (pid: 12353) booted, phase: 0
however when I add the -d rails starts in single mode, confirmed by checking running processes
rails s -e production -b 0.0.0.0 -d
=> Booting Puma
=> Rails 5.0.0.1 application starting in production on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
checking running processes confirms only one instance is running, not the clustered mode expected.
So, how do I correctly launch with workers as a deamon process?
Any help is much appreciated.
NOTE: I am also running puma_worker_killer for rolling restarts in case that helps.
rails (5.0.0.1)
puma (3.4.0)
puma_worker_killer (0.1.0)
According to the Puma docs, it's recommended that you start with bundle exec puma.
You can then start a cluster like this: puma -t 8:32 -w 3. Where -t is the min:max number of threads and -w is the number of workers.
I am just starting to learn Rails in the new AWS Cloud 9 on a Mac and I cannot stop the Rails server. The instructions say to use Control+c but in the Cloud9 terminal with Rails running this just writes:
^[c
...and then creates a new line and does nothing.
I have also tried killall -9 rails but this just writes it in the terminal and again creates a new line but does nothing. Any help here please? Here is what my Cloud 9 terminal currently looks like:
ec2-user:~/ruby_projects (master) $ rails s -b $IP -p $PORT
=> Booting Puma
=> Rails 5.2.1 application starting in development
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.12.0 (ruby 2.4.1-p111), codename: Llamas in Pajamas
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://127.0.0.1:8080
Use Ctrl-C to stop
^[c
c
^[c
killall -9 rails
If Control + C doesn't do the trick then just close the terminal and that should kill all ongoing processes in that terminal.
You can verify that it killed it by running ps aux | grep "rails" and then checking if there are any entries. If there is one find the process ID and then kill it (or you could just kill it with ps aux | grep -ie rails | awk '{print $2}' | xargs kill -9).
When I run rails s -e production -p 9292 (normal case), I get:
=> Booting Puma
=> Rails 5.1.1 application starting in production on http://0.0.0.0:9292
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.8.2 (ruby 2.3.0-p0), codename: Sassy Salamander
* Min threads: 5, max threads: 5
* Environment: production
* Listening on tcp://0.0.0.0:9292
Use Ctrl-C to stop
When I run rails s -d -e production -p 9292 (as daemon), I get:
=> Booting Puma
=> Rails 5.1.1 application starting in production on http://0.0.0.0:9292
=> Run `rails server -h` for more startup options
That's it. I would need to run bundle exec puma -e production -p 9292 --pidfile tmp/pids/puma.pid -d to get the 2nd part:
Puma starting in single mode...
...
Also where are my Puma logs? I see a blank production.log in my log folder and no other log files.
Background context: When I run curl 0.0.0.0:9292 after running both rails and puma as daemons, I get the error An unhandled lowlevel error occurred. The application logs may have details.
rails s -e production -p 9292 -d
Ah, seems Puma only cares about RAILS_ENV when used with capistrano. Can you use RACK_ENV or use -e instead? That should work:
RACK_ENV=production bundle exec puma -p 3000
or
bundle exec puma -p 3000 -e production
See here
Hope to help
to kill the server
kill cat tmp/pids/server.pid
rails s -e production -p 9292 -d
For Puma Versions Below 5, we can use -d option to start in background.
puma -e production -p 4132 -C config/puma.rb -d
But Puma gem does n't support -d option in versions above 5.
In version 5.0 the authors of the popular Ruby web server Puma chose
to remove the daemonization support from Puma, because the code wasn't
wall maintained, and because other and perhaps better options exist
(such as systemd, etc), not to mention many people have switched to
Kubernetes and Docker, where you want to start all servers on the
foreground
You can use this gem for starting in background.
https://github.com/kigster/puma-daemon
https://rubygems.org/gems/puma-daemon/versions/0.1.2
On my amazon EC2 server, after I install ruby/rails/rbenv I run into an URI::InvalidURIError error. I'm not sure if I might have an issue with the way I installed rbenv.
rails s -p 3000 -b 0.0.0.0
=> Booting Puma
=> Rails 5.0.1 application starting in development on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.6.2 (ruby 2.3.1-p112), codename: Sleepy Sunday Serenity
* Min threads: 5, max threads: 5
* Environment: development
Exiting
home/ec2-user/.rbenv/versions/2.3.1/lib/ruby/2.3.0/uri/rfc3986_parser.rb:21:in `split': URI must be ascii only "tcp://0.0.0.0\u{feff}:3000" (URI::InvalidURIError)
from /home/ec2-user/.rbenv/versions/2.3.1/lib/ruby/2.3.0/uri/rfc3986_parser.rb:73:in `parse'
from /home/ec2-user/.rbenv/versions/2.3.1/lib/ruby/2.3.0/uri/common.rb:227:in `parse'
Somehow, you managed to add an invisible <U+FEFF> character at the end of your command-line:
rails s -p 3000 -b 0.0.0.0[<U+FEFF> is here]
Remove this character from your command-line, and your server should boot fine:
rails s -p 3000 -b 0.0.0.0