mirror of https://github.com/vapor/docs.git
73 lines
1.9 KiB
Markdown
73 lines
1.9 KiB
Markdown
# Supervisor
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[Supervisor](http://supervisord.org) is a process control system that makes it easy to start, stop, and restart your Vapor app.
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## Install
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Supervisor can be installed through package managers on Linux.
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### Ubuntu
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```sh
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sudo apt-get update
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sudo apt-get install supervisor
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```
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### CentOS and Amazon Linux
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```sh
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sudo yum install supervisor
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```
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### Fedora
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```sh
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sudo dnf install supervisor
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```
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## Configure
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Each Vapor app on your server should have its own configuration file. For an example `Hello` project, the configuration file would be located at `/etc/supervisor/conf.d/hello.conf`
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```sh
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[program:hello]
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command=/home/vapor/hello/.build/release/App serve --env production
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directory=/home/vapor/hello/
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user=vapor
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stdout_logfile=/var/log/supervisor/%(program_name)-stdout.log
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stderr_logfile=/var/log/supervisor/%(program_name)-stderr.log
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```
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As specified in our configuration file the `Hello` project is located in the home folder for the user `vapor`. Make sure `directory` points to the root directory of your project where the `Package.swift` file is.
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The `--env production` flag will disable verbose logging.
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### Environment
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You can export variables to your Vapor app with supervisor. For exporting multiple environment values, put them all on one line. Per [Supervisor documentation](http://supervisord.org/configuration.html#program-x-section-values):
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> Values containing non-alphanumeric characters should be quoted (e.g. KEY="val:123",KEY2="val,456"). Otherwise, quoting the values is optional but recommended.
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```sh
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environment=PORT=8123,ANOTHERVALUE="/something/else"
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```
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Exported variables can be used in Vapor using `Environment.get`
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```swift
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let port = Environment.get("PORT")
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```
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## Start
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You can now load and start your app.
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```sh
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supervisorctl reread
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supervisorctl add hello
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supervisorctl start hello
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```
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!!! note
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The `add` command may have already started your app.
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