L'esecuzione dal Launcher funziona diversamente rispetto al comando "enter and run"

Supporto Installazione
1

Entering app context and running my command works as expected.

/var/discourse# ./launcher enter app
/var/www/discourse# discourse disable_restore
Restore are now forbidden. Enable them with `enable_restore`

I expected the ./launcher run app "discourse disable_restore" to be the same thing, implicitly changing to the docker context, but it fails with an weird redis connection refused.

/var/discourse# ./launcher run app "discourse disable_restore"
Failed to report error: Error connecting to Redis on localhost:6379 (Errno::ECONNREFUSED) 2 Error connecting to Redis on localhost:6379 (Errno::ECONNREFUSED) subscribe failed, reconnecting in 1 second. 
Call stack ["/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/client.rb:344:in `rescue in establish_connection'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/client.rb:328:in `establish_connection'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/client.rb:99:in `block in connect'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/client.rb:291:in `with_reconnect'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/client.rb:98:in `connect'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/client.rb:274:in `with_socket_timeout'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/client.rb:131:in `call_loop'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/subscribe.rb:43:in `subscription'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis/subscribe.rb:12:in `subscribe'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis.rb:2824:in `_subscription'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis.rb:2192:in `block in subscribe'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis.rb:45:in `block in synchronize'", "/usr/local/lib/ruby/2.5.0/monitor.rb:226:in `mon_synchronize'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis.rb:45:in `synchronize'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/redis-4.0.1/lib/redis.rb:2191:in `subscribe'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/message_bus-2.1.6/lib/message_bus/backends/redis.rb:337:in `global_subscribe'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/message_bus-2.1.6/lib/message_bus.rb:533:in `global_subscribe_thread'", "/var/www/discourse/vendor/bundle/ruby/2.5.0/gems/message_bus-2.1.6/lib/message_bus.rb:481:in `block in new_subscriber_thread'"] 
bundler: failed to load command: script/discourse (script/discourse)
Redis::CannotConnectError: Error connecting to Redis on localhost:6379 (Errno::ECONNREFUSED)

Is it expected behaviour?

I’m running from master (discourse 42aefc3 and discourse_docker 3377f26).

2

It worked for me just now.

root@lh:/var/discourse#` ./launcher run web_only "discourse disable_restore"`
Restore are now forbidden. Enable them with `enable_restore`
root@lh:/var/discourse# ./launcher run web_only "discourse enable_restore"
Restore are now permitted. Disable them with `disable_restore`

But maybe there’s something different in a web-only vs single-container solution. You might try

 ./launcher run app  "su discourse discourse disable_restore"
3

Tried your solution but does not work. :frowning:

/var/discourse# ./launcher run app "su discourse discourse disable_restore" discourse is not in the sudoers file. This incident will be reported.

4

Hmm. Well, I’ll try on a single container install today if I get a chance.

5

I solved my issue with another @pfaffman answer: Running commands inside discourse container?

docker exec -w /var/www/discourse -i app discourse enable_restore

Works for me, but I expected ./launcher run app "command" to be the way to do it.

Thanks!

6

Glad my answer worked! The ./launcher run command is pretty new, but I’d expect it to work too.

7

Ciao a tutti!

Ho riscontrato lo stesso problema. Vorrei eseguire ./launcher per abilitare il ripristino. Qual è il modo corretto per farlo?

Quindi, invece di

vagrant ssh -c 'cd /vagrant;sudo ./launcher run discourse discourse enable_restore'

funziona per me (come indicato sopra):

vagrant ssh -c 'sudo docker exec -w /var/www/discourse -i discourse discourse enable_restore'

ma mi aspetto qualcosa di più diretto. Non voglio semplicemente scendere nei dettagli tecnici e rimanere “al sicuro” utilizzando i comandi standard. Pensavo che launcher fosse proprio fatto per questo scopo.

8

Sono contento che tu lo abbia detto.

So che il post è del 2018, ma probabilmente non era un comando semplice da implementare correttamente, considerando gli utenti previsti.

Ho passato gli ultimi giorni a smontare pezzo per pezzo lo script del launcher e ora sto lavorando sul comando run. Mentre lavoro sui comandi del launcher, provo anche a ricreare gli stessi passaggi utilizzando i comandi Docker corrispondenti.

Per run sapevo che esistevano due comandi Docker che utilizzano run:

docker container run
docker run

ma non essendo un esperto di Docker, non riesco a spiegare alla mia “anatra di gomma” (rubber duck) quali siano le differenze o se non ce ne siano.

Quindi, quando ho provato un semplice ls, ci ha messo così tanto che ho quasi fatto una pausa per bere qualcosa. Alla fine ha restituito il risultato corretto di ls, ed è allora che ho deciso di analizzare esattamente cosa stava facendo launcher run.

Quando ho visto questo:

  (exec $docker_path run --rm --shm-size=512m $user_args $links "${env[@]}" -e DOCKER_HOST_IP="$docker_ip" -i -a stdin -a stdout -a stderr $volumes $run_image \
    /bin/bash -c "$run_command") || ERR=$?

non potevo crederci. Non ho chiesto il motivo di questo approccio perché a volte la risposta si trova in un post se si cerca con attenzione, ma anche se non trovo la risposta, ne uscirò molto meglio informato.

** EDIT **

Post correlato: Cercando di capire il launcher come una serie di comandi Docker

Risultato dell’esecuzione di launcher run app ls come indicato nel post correlato, ovvero:

groot@galaxy:/var/discourse$ sudo bash -x launcher run app ls 2> ~/traces/ls_01
eric@swi-prolog:/var/discourse$ grep /usr/bin/docker ~/traces/ls_01

Output:

+ docker_path=/usr/bin/docker
+ '[' -z /usr/bin/docker ']'
++ /usr/bin/docker info
+ /usr/bin/docker info
++ /usr/bin/docker --version
++ /usr/bin/docker images
++ /usr/bin/docker run -i --rm -a stdout -a stderr discourse/base:2.0.20200512-1735 echo working
++ /usr/bin/docker info --format '{{.DockerRootDir}}'
+ '[' -z /usr/bin/docker ']'
++ /usr/bin/docker --version
+++ /usr/bin/docker run --rm -i -a stdin -a stdout discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''; puts YAML.load(STDIN.readlines.join)['\''templates'\'']'
++++ /usr/bin/docker run --rm -i -a stdin -a stdout discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''; puts YAML.load(STDIN.readlines.join)['\''templates'\'']'
++ /usr/bin/docker run --rm -i -a stdin -a stdout discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''
++ /usr/bin/docker run --rm -i -a stdin -a stdout discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''
++ /usr/bin/docker run --rm -i -a stdin -a stdout discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''
++ /usr/bin/docker run --rm -i -a stdout -a stdin discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''; puts YAML.load(STDIN.readlines.join)['\''docker_args'\'']'
++ /usr/bin/docker run --rm -i -a stdout -a stdin discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''; puts YAML.load(STDIN.readlines.join)['\''volumes'\''].map{|v| '\''-v '\'' << v['\''volume'\'']['\''host'\''] << '\'':'\'' << v['\''volume'\'']['\''guest'\''] << '\'' '\''}.join'
++ /usr/bin/docker run --rm -i -a stdout -a stdin discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''; puts YAML.load(STDIN.readlines.join)['\''links'\''].map{|l| '\''--link '\'' << l['\''link'\'']['\''name'\''] << '\'':'\'' << l['\''link'\'']['\''alias'\''] << '\'' '\''}.join'
++ /usr/bin/docker run --rm -i -a stdin -a stdout discourse/base:2.0.20200512-1735 ruby -e 'require '\''yaml'\''; puts YAML.load(STDIN.readlines.join)['\''run_image'\'']'
+ exec /usr/bin/docker run --rm --shm-size=512m -e LANG=en_US.UTF-8 -e RAILS_ENV=production -e UNICORN_WORKERS=4 -e UNICORN_SIDEKIQS=1 -e RUBY_GLOBAL_METHOD_CACHE_SIZE=131072 -e RUBY_GC_HEAP_GROWTH_MAX_SLOTS=40000 -e RUBY_GC_HEAP_INIT_SLOTS=400000 -e RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR=1.5 -e DISCOURSE_DB_SOCKET=/var/run/postgresql -e DISCOURSE_DB_HOST= -e DISCOURSE_DB_PORT= -e LETSENCRYPT_DIR=/shared/letsencrypt -e DISCOURSE_HOSTNAME=discourse.galaxy.org -e DISCOURSE_DEVELOPER_EMAILS=groot@galaxy.org -e DISCOURSE_SMTP_ADDRESS=smtp.mailgun.org -e DISCOURSE_SMTP_PORT=587 -e DISCOURSE_SMTP_USER_NAME=groot@mg.galaxy.org -e DISCOURSE_SMTP_PASSWORD= I_am_Groot -e LETSENCRYPT_ACCOUNT_EMAIL=groot@galaxy.org -e DOCKER_HOST_IP=NNN.MMM.OOO.PPP -i -a stdin -a stdout -a stderr -v /var/discourse/shared/standalone:/shared -v /var/discourse/shared/standalone/log/var-log:/var/log local_discourse/app /bin/bash -c ls