systemd

Created symlink /etc/systemd/system/redis.service → /lib/systemd/system/redis-server.service

the environment file

APP_ROOT=/srv/app/api
BINARY="api.jar"
PORT="1998"
USER="user"
JAVA_OPTS="-Xmx128m"
CONFIG_SERVER="-Dspring.cloud.config.uri=http://api:10000"
LOGGING="-Dlogging.config=/etc/logback-spring.xml -Dlogging.path=/opt/chuck/chuck-api/logs"

the systemd unit file

[Unit]
Description=chuck-api
After=syslog.target

[Service]
EnvironmentFile=-/etc/default/chuck-api
WorkingDirectory=/opt/chuck/chuck-api/current
User=chuck
ExecStart=/usr/bin/java -Duser.timezone=UTC $LOGGING $CONFIG_SERVER $JAVA_OPTS -Dserver.port=${PORT} -jar $BINARY
StandardOutput=journal
StandardError=journal
SyslogIdentifier=chuck-api
SuccessExitStatus=143

[Install]
WantedBy=multi-user.target

其中:

- `WorkingDirectory` : app运行目录
- `SyslogIdentifier` : syslog 前缀
- `SuccessExitStatus` : JVM 成功退出码 `143` 
- `WorkingDirectory` and `User` 不能用环境变量

systemd fd limit

系统

• ulimit -n num

systemd

• fd 默认4096

*.server

[Service]
LimitCORE=infinity
LimitNOFILE=100000
LimitNPROC=100000