启动器运行方式与输入并运行命令不同

支持 安装
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? - #5 by pfaffman

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

大家好！

我遇到了同样的问题。我想运行 ./launcher 来启用恢复功能。正确的做法是什么？

所以，与其使用

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

对我而言（如上所述）有效的是：

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

但我希望有更直接的方法。我根本不想深入底层，而是希望通过标准命令保持“安全”。我原本以为 launcher 就是为此设计的。

8

很高兴你提到了这一点。

我知道这篇帖子来自 2018 年，但考虑到预期的用户群体，当时要正确实现这个命令可能并不简单。

过去几天我一直在逐行拆解启动器脚本，现在正研究 run 命令。在研究启动器命令时，我也会尝试使用相应的 Docker 命令来重现相同的步骤。

对于 run，我知道有两个 Docker 命令使用了 run：

docker container run
docker run

但因为我不是 Docker 专家，我无法向“橡皮鸭”解释它们之间的区别，或者是否根本没有区别。

因此，当我尝试一个简单的 ls 命令时，它花费了太长时间，我差点去喝杯饮料休息一下。它确实返回了正确的 ls 结果，于是我仔细查看了 launcher run 到底在做什么。

当我看到这段代码时：

  (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=$?

我简直不敢相信。我还没有问为什么是这样，因为有时候答案就藏在帖子中，只要你仔细寻找；而且即使我找不到答案，我也会因此获得更充分的信息。

** 编辑 **

相关帖子：试图将启动器理解为一系列 Docker 命令

在相关帖子中提到的运行 launcher run app ls 的结果，即：

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

输出：

+ 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