英文:
Unrecognised GOPATH when running Golang program using supervisord
问题
我有一个使用Golang编写的实现Web服务器的程序。它预期会持续运行，并在出现任何意外故障或崩溃时重新启动自身。为此，我正在尝试将其配置为UNIX进程，使用supervisord。然而，我面临的问题是，代码中包含的外部Go库无法被supervisord识别，因为它无法识别GOPATH。这导致出现以下错误：
web_server.go:11:2: cannot find package "github.com/gorilla/mux" in any of:
/usr/lib/go/src/github.com/gorilla/mux (from $GOROOT)
($GOPATH not set)
当使用supervisord运行Web服务器时。我的Web服务器的supervisord配置如下：
[program:web_server]
command=go run web_server.go
directory=/home/ubuntu
autostart=true
autorestart=true
startretries=5
stderr_logfile=/home/ubuntu/err_logs/web_server.err.log
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
有什么解决方法吗？
英文:
I have a Golang program implementing a web server. It is expected to be running continuously, and incase of any unexpected failure or crash, to restart itself. For that, I am trying to configure it as a UNIX-process using supervisord. However, the issue I am facing is that the external go libraries included in the code aren't getting recognised as supervisord is unable to recognise the GOPATH. This is leading to errors such as:
web_server.go:11:2: cannot find package "github.com/gorilla/mux" in any of:
/usr/lib/go/src/github.com/gorilla/mux (from $GOROOT)
($GOPATH not set)
when running the web server using supervisord. The supervisord configuration for my web server is:
[program:web_server]
command=go run web_server.go
directory=/home/ubuntu
autostart=true
autorestart=true
startretries=5
stderr_logfile=/home/ubuntu/err_logs/web_server.err.log
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
What is the workaround for this?
答案1
得分: 4
supervisord的一个重要属性是，子进程将继承启动supervisord程序的shell的环境。supervisord本身还会在子进程的环境中设置一些环境变量，包括SUPERVISOR_ENABLED（表示该进程受supervisor控制的标志）、SUPERVISOR_PROCESS_NAME（指定该进程的配置文件中的进程名称）和SUPERVISOR_GROUP_NAME（指定子进程的配置文件中的进程组名称）。
这些环境变量可以在[supervisord]部分的environment配置选项中进行覆盖（适用于所有子进程），或者在每个[program:x]部分的环境配置选项中进行覆盖（仅适用于[program:x]部分指定的子进程）。
因此，在environment变量中添加GOPATH解决了该问题。
[program:web_server]
command=go run web_server.go
directory=/home/ubuntu
autostart=true
autorestart=true
startretries=5
stderr_logfile=/home/ubuntu/err_logs/web_server.err.log
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
environment=GOPATH="/home/ubuntu"
参考链接：这里
英文:
One important property of supervisord as stated [here][1], that I had been missing out is:
> Subprocesses will inherit the environment of the shell used to start
> the supervisord program. Several environment variables will be set by
> supervisord itself in the child’s environment also, including
> SUPERVISOR_ENABLED (a flag indicating the process is under supervisor
> control), SUPERVISOR_PROCESS_NAME (the config-file-specified process
> name for this process) and SUPERVISOR_GROUP_NAME (the
> config-file-specified process group name for the child process).
>
> These environment variables may be overridden within the [supervisord]
> section config option named environment (applies to all subprocesses)
> or within the per- [program:x] section environment config option
> (applies only to the subprocess specified within the [program:x]
> section).
Therefore, adding the GOPATH in the environment variable solved the issue.
[program:web_server]
command=go run web_server.go
directory=/home/ubuntu
autostart=true
autorestart=true
startretries=5
stderr_logfile=/home/ubuntu/err_logs/web_server.err.log
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
environment=GOPATH="/home/ubuntu"
[1]: http://supervisord.org/subprocess.html#subprocess-environment "here"
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