Process could not be executed Exec format error

2020-12-18 乐帮网

centos netcore

遇到场景，在CentOS中使用NetCore3.1写了一个服务类，然后在目录/usr/lib/systemd/system下配置vktdemo.service文件，再使用systemctl start vktdemo启动服务，遇到如下错误：

-- Automatic restarting of the unit vktdemo.service has been scheduled, as the result for
-- the configured Restart= setting for the unit.
Dec 18 01:44:11 test systemd[1]: Stopped vkt demo service.
-- Subject: Unit vktdemo.service has finished shutting down
-- Defined-By: systemd
-- Support: https://access.redhat.com/support
-- 
-- Unit vktdemo.service has finished shutting down.
Dec 18 01:44:11 test systemd[1]: Starting vkt demo service...
-- Subject: Unit vktdemo.service has begun start-up
-- Defined-By: systemd
-- Support: https://access.redhat.com/support
-- 
-- Unit vktdemo.service has begun starting up.
Dec 18 01:44:11 test systemd[43405]: vktdemo.service: Failed to execute command: Exec format error
Dec 18 01:44:11 test systemd[43405]: vktdemo.service: Failed at step EXEC spawning /home/vktservice/demo/vkt.demo.workerservice.dll: Exec format error
-- Subject: Process /home/vktservice/demo/vkt.demo.workerservice.dll could not be executed
-- Defined-By: systemd
-- Support: https://access.redhat.com/support
-- 
-- The process /home/vktservice/demo/vkt.demo.workerservice.dll could not be executed and failed.
-- 
-- The error number returned by this process is 8.
Dec 18 01:44:11 test systemd[1]: vktdemo.service: Main process exited, code=exited, status=203/EXEC
Dec 18 01:44:11 test systemd[1]: vktdemo.service: Failed with result 'exit-code'.
Dec 18 01:44:11 test systemd[1]: Failed to start vkt demo service.
-- Subject: Unit vktdemo.service has failed
-- Defined-By: systemd
-- Support: https://access.redhat.com/support
-- 
-- Unit vktdemo.service has failed.
-- 
-- The result is failed.

经过分析，问题出在执行入口的地方，从以下两方面解决问题，
（1）检查入口文件的路径是否正确。
（2）服务入口文件的命令行不正确。

我这个是由于填写的入口命令行不正确，由于我是netCore发布的服务，执行入口写成了ExecStart=/home/vktservice/demo/vkt.demo.workerservice.dll
正确的写法是：ExecStart=/usr/bin/dotnet /home/vktservice/demo/vkt.demo.workerservice.dll

重新修改文件后重新启动服务，一切都正常了。

部署过程详情：https://lebang2020.cn/details/201217nfitaj1o.html

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