编译安装httpd2.4.25并编写systemd脚本

编译安装httpd2.4.25并编写systemd脚本

一、官方的httpd安装脚本

[root@textbox ~]# rpm -q --scripts httpdpreinstall scriptlet (using /bin/sh):# Add the "apache" group and user/usr/sbin/groupadd -g 48 -r apache 2> /dev/null || :/usr/sbin/useradd -c "Apache" -u 48 -g apache \    -s /sbin/nologin -r -d /usr/share/httpd apache 2> /dev/null || :postinstall scriptlet (using /bin/sh):if [ $1 -eq 1 ] ; then         # Initial installation         systemctl preset httpd.service htcacheclean.service >/dev/null 2>&1 || : fipreuninstall scriptlet (using /bin/sh):if [ $1 -eq 0 ] ; then         # Package removal, not upgrade         systemctl --no-reload disable httpd.service htcacheclean.service > /dev/null 2>&1 || :         systemctl stop httpd.service htcacheclean.service > /dev/null 2>&1 || : fipostuninstall scriptlet (using /bin/sh):systemctl daemon-reload >/dev/null 2>&1 || : # Trigger for conversion from SysV, per guidelines at:# https://fedoraproject.org/wiki/Packaging:ScriptletSnippets#Systemdposttrans scriptlet (using /bin/sh):test -f /etc/sysconfig/httpd-disable-posttrans || \  /bin/systemctl try-restart httpd.service htcacheclean.service >/dev/null 2>&1 || :

二、httpd的systemd文件

参考：http://www.jinbuguo.com/systemd/systemd.kill.html

分为3部分：[Unit]、[Service]和[Install]

[root@textbox system]# cat httpd.service[Unit]Description=The Apache HTTP Server      #描述信息After=network.target remote-fs.target nss-lookup.target     #当前unit应当晚于哪些unit启动Documentation=man:httpd(8)      #man手册Documentation=man:apachectl(8)  #man手册[Service]Type=notify     #unit进程启动类型，notify为在启动完成后会发送一个通知消息。还需要配合 NotifyAccess 来让 Systemd 接收消息 EnvironmentFile=/etc/sysconfig/httpd    #环境配置文件ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND #指明启动unit要运行命令或脚本的绝对路径 ExecReload=/usr/sbin/httpd $OPTIONS -k graceful #指明reloadunit要运行的命令或脚本绝对路径ExecStop=/bin/kill -WINCH ${MAINPID}    #指明停止unit要运行的命令或脚本# We want systemd to give httpd some time to finish gracefully, but still want# it to kill httpd after TimeoutStopSec if something went wrong during the# graceful stop. Normally, Systemd sends SIGTERM signal right after the# ExecStop, which would kill httpd. We are sending useless SIGCONT here to give# httpd time to finish.KillSignal=SIGCONT  #设置杀死进程的 第一步使用什么信号(见上文)SIGCONT是18号信号，表示继续PrivateTmp=true     #启动服务时会在/tmp目录生成一个类似system-private-xxx的文件，存在临时文件[Install]WantedBy=multi-user.target      #：被哪些units所依赖，弱依赖 

三、一键安装脚本

参考：https://blog.51cto.com/14012942/2427694

四、最终自己写的system文件

[root@textbox ~]# cat /usr/lib/systemd/system/httpd.service [Unit]Description=The Apache HTTP ServerAfter=network.target remote-fs.target nss-lookup.target[Service]Type=simpleEnvironmentFile=/etc/httpd/httpd.confExecStart=/apps/httpd24/bin/apachectl -k start  -DFOREGROUNDExecReload=/apps/httpd24/bin/apachectl  -k gracefulExecStop=/usr/bin/kill -WINCH ${MAINPID}PrivateTmp=true[Install]WantedBy=multi-user.target

效果：

[root@textbox ~]# systemctl start httpd[root@textbox ~]# systemctl status httpd● httpd.service - The Apache HTTP Server   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)   Active: active (running) since Wed 2019-09-04 21:25:16 CST; 1min 51s ago Main PID: 35575 (apachectl)   CGroup: /system.slice/httpd.service           ├─35575 /bin/sh /apps/httpd24/bin/apachectl -k start -DFOREGROUND           ├─35577 /apps/httpd24/bin/httpd -k start -DFOREGROUND           ├─35593 /apps/httpd24/bin/httpd -k start -DFOREGROUND           ├─35594 /apps/httpd24/bin/httpd -k start -DFOREGROUND           └─35595 /apps/httpd24/bin/httpd -k start -DFOREGROUNDSep 04 21:25:16 textbox systemd[1]: Started The Apache HTTP Server.Sep 04 21:25:31 textbox apachectl[35575]: AH00558: httpd: Could not reliably determine the server's fully qual...ssageHint: Some lines were ellipsized, use -l to show in full.[root@textbox ~]# systemctl stop httpd[root@textbox ~]# systemctl status httpd● httpd.service - The Apache HTTP Server   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)   Active: inactive (dead)