布署环境为debian 7.5
布署到一台新机器,系统版本为debian 8.0
原启动项
/etc/init.d/mongo_service
开机居然无法自起
开机自启动不能用了,看页面输出就发觉不对劲,确定是systemd,之前搭建部署coreos(也是用的systemd) docker kubernetes接触过,很亲切,只是迁移要费点时间。
原来debian升级8.0后,改为用systemd管理启动项。
查资料知,兼容原启动管理,systemd 会自动生成 unit。
输入
systemctl enable mongo_service
systemd 会根据原/etc/init.d/mongo_service的内容自动创建一个新的 service 内容如下
root@debian:~# systemctl cat mongo_service.service # /run/systemd/generator.late/mongo_service.service # Automatically generated by systemd-sysv-generator [Unit] SourcePath=/etc/init.d/mongo_service Description=LSB: An object/document-oriented database Before=runlevel2.target runlevel3.target runlevel4.target runlevel5.target shutdown.target After=network-online.target local-fs.target remote-fs.target nss-lookup.target Wants=network-online.target Conflicts=shutdown.target [Service] Type=forking Restart=no TimeoutSec=5min IgnoreSIGPIPE=no KillMode=process GuessMainPID=no RemainAfterExit=yes SysVStartPriority=1 ExecStart=/etc/init.d/mongo_service start ExecStop=/etc/init.d/mongo_service stop
reboot 启动 OK
试了试forever 的开机自起。
这东西曾经比较麻烦,写在rc里,执行不起来。
一般的解决办法是是写个shell执行 foreve 再把这个shell加为service 并设置开机启动。
到了systemd这里,非常简单。
只要设个service就行。
内容如下
# /etc/systemd/system/hellowordweb.service [Unit] Description=hello wrod web site After=mongo_service.service Wants=network-online.target Conflicts=shutdown.target [Service] Type=forking Restart=no TimeoutSec=5min ExecStart=/bin/forever start /root/hellowordweb/bin/cluster.js ExecStop=/bin/forever stop /root/hellowordweb/bin/cluster.js
以下是启动日志
root@debian:~# systemctl status hellowordweb.service
hellowordweb.service - xiaoyun audit web site Loaded: loaded (/etc/systemd/system/hellowordweb.service; enabled) Active: active (running) since Mon 2015-06-01 06:22:49 EDT; 1s ago Process: 1128 ExecStart=/bin/forever start /root/hellowordweb/bin/cluster.js (code=exited, status=0/SUCCESS) Main PID: 1133 (node) CGroup: /system.slice/hellowordweb.service ├─1133 /root/node-v0.12.4-linux-x64/bin/node /lib/node_modules/forever/bin/monitor /root/hellowordweb/bin/cluster.js ├─1134 test-xiaoyun-data-api: master ├─1135 test-xiaoyun-data-api: worker 1 └─1136 test-xiaoyun-data-api: worker 2