zookeeper systemd问题

系统升至Centos7后，systemd替代initd成了pid 为1的进程，用于启动其它unit

习惯写init.d脚本，本以为写systemd也简单，实际写zookeeper systemd就碰到不少问题

[Unit]

Description=zookeeper.service

After=network.target

[Service]

Type=forking

User=zookeeper

Group=zookeeper

SyslogIdentifier=zk

Environment=ZOO_LOG4J_PROP=WARN,ROLLINGFILE

Environment=ZOO_LOG_DIR=/data/softwares/zookeeper-3.4.14/logs

Environment=ZOOPIDFILE=/home/zookeeper/zookeeper_server.pid

PIDFile=/home/zookeeper/zookeeper_server.pid

WorkingDirectory=/data/softwares/zookeeper-3.4.14

ExecStart=/data/softwares/zookeeper-3.4.14/bin/zkServer.sh start

ExecStop=/data/softwares/zookeeper-3.4.14/bin/zkServer.sh stop

ExecReload=/data/softwares/zookeeper-3.4.14/bin/zkServer.sh restart

LimitNPROC=65536

LimitNOFILE=104800

Restart=on-failure

[Install]

WantedBy=multi-user.target

问题出在Environment=ZOOPIDFILE=和PIDFile=，前者是zookeeper zkServer.sh监控zk process pid文件，后者是systemd监控 zk process pid文件，两者不一致的话conflict就出来了，systemdctl start启动不了。网上找了一大堆都没说到点子上。strace systemdctl start zookeeper也解决不了，journalctl -u zookeeper报一大堆不相关的错误。