systemd开机服务设置参数

Systemd入门教程：实战篇https://www.linuxprobe.com/systemd-bestry-artikel.html

systemd添加自定义系统服务设置自定义开机启动http://www.cnblogs.com/wjb10000/p/5566801.html

systemd有系统和用户区分；系统（/user/lib/systemd/system/）、用户（/etc/lib/systemd/user/）.一般系统管理员手工创建的单元文件建议存放在/etc/systemd/system/目录下面。

etcd例子

[Unit]
Description=etcd server
# Documentation=http://nginx.org/en/docs/
After=network.target sshd-keygen.service
After=network-online.target
Wants=network-online.target
 
[Service]
Type=notify
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=/etc/etcd/etcd.conf
ExecStart=/bin/bash -c "GOMAXPROCS=$(nproc) /usr/bin/etcd --name=\"${ETCD_NAME}\" --data-dir=\"${ETCD_DATA_DIR}\" --listen-client-urls=\"${ETCD_LISTEN_CLIENT_URLS}\" --listen-peer-urls=\"${ETCD_LISTEN_PEER_URLS}\" --advertise-client-urls=\"${ETCD_ADVERTISE_CLIENT_URLS}\" --initial-advertise-peer-urls=\"${ETCD_INITIAL_ADVERTISE_PEER_URLS}\" --initial-cluster=\"${ETCD_INITIAL_CLUSTER}\" --initial-cluster-state=\"${ETCD_INITIAL_CLUSTER_STATE}\""
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
Restart=on-failure
LimitNOFILE=65536
 
[Install]
WantedBy=multi-user.target

etcd例子2

在/etc/systemd/system/目录里创建etcd2.service

[Unit]
Description=etcd2.service

[Service]
Type=notify
TimeoutStartSec=0
Restart=always
ExecStartPre=-/bin/mkdir -p /data/etcd2
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
ExecStart=/usr/bin/etcd \
  --data-dir /data/etcd2 \
  --name etcd0 \
  --advertise-client-urls http://172.18.6.101:2379,http://172.18.6.101:4001 \
  --listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 \
  --initial-advertise-peer-urls http://172.18.6.101:2380 \
  --listen-peer-urls http://0.0.0.0:2380 \
  --initial-cluster-token etcd-cluster-1 \
  --initial-cluster etcd0=http://172.18.6.101:2380,etcd1=http://172.18.6.102:2380,etcd2=http://172.18.6.103:2380

[Install]
WantedBy=multi-user.target

# 设置服务自启动
systemctl enable /etc/systemd/system/etcd2.service
# 启动etcd2
systemctl restart etcd2.service

etcd例子3

source /opt/k8s/bin/environment.sh
cat > etcd.service.template <<EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
Documentation=https://github.com/coreos

[Service]
User=k8s
Type=notify
WorkingDirectory=/var/lib/etcd/
ExecStart=/opt/k8s/bin/etcd \\
  --data-dir=/var/lib/etcd \\
  --name=##NODE_NAME## \\
  --cert-file=/etc/etcd/cert/etcd.pem \\
  --key-file=/etc/etcd/cert/etcd-key.pem \\
  --trusted-ca-file=/etc/kubernetes/cert/ca.pem \\
  --peer-cert-file=/etc/etcd/cert/etcd.pem \\
  --peer-key-file=/etc/etcd/cert/etcd-key.pem \\
  --peer-trusted-ca-file=/etc/kubernetes/cert/ca.pem \\
  --peer-client-cert-auth \\
  --client-cert-auth \\
  --listen-peer-urls=https://##NODE_IP##:2380 \\
  --initial-advertise-peer-urls=https://##NODE_IP##:2380 \\
  --listen-client-urls=https://##NODE_IP##:2379,http://127.0.0.1:2379 \\
  --advertise-client-urls=https://##NODE_IP##:2379 \\
  --initial-cluster-token=etcd-cluster-0 \\
  --initial-cluster=${ETCD_NODES} \\
  --initial-cluster-state=new
Restart=on-failure
RestartSec=5
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF