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怎么在RHEL7或CentOS7上安装etcd集群

在RHEL7或CentOS7上安装etcd集群，其实就3步，安装、配置、启动。

1、yum安装etcd

yum -y install etcd

2、配置

etcd1配置如下：

# grep -vE "^#|^$" /etc/etcd/etcd.conf 

# [member]

ETCD_NAME="etcd1"

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_PEER_URLS="https://192.168.1.8:2380"

ETCD_LISTEN_CLIENT_URLS="https://192.168.1.8:2379,https://127.0.0.1:2379"

#[cluster]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.8:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.8:2379"

ETCD_INITIAL_CLUSTER="etcd1=https://192.168.1.8:2380,etcd2=https://192.168.1.9:2380,etcd3=https://192.168.1.10:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

etcd2配置如下：

#[cluster]

ETCD_NAME="etcd2"

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_PEER_URLS="https://192.168.1.9:2380"

ETCD_LISTEN_CLIENT_URLS="https://192.168.1.9:2379,https://127.0.0.1:2379"

#[cluster]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.9:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.9:2379"

ETCD_INITIAL_CLUSTER="etcd1=https://192.168.1.8:2380,etcd2=https://192.168.1.9:2380,etcd3=https://192.168.1.10:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

etcd3配置如下：

#[cluster]

ETCD_NAME="etcd2"

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_PEER_URLS="https://192.168.1.10:2380"

ETCD_LISTEN_CLIENT_URLS="https://192.168.1.10:2379,https://127.0.0.1:2379"

#[cluster]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.10:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.10:2379"

ETCD_INITIAL_CLUSTER="etcd1=https://192.168.1.8:2380,etcd2=https://192.168.1.9:2380,etcd3=https://192.168.1.10:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

3、启动etcd

systemctl start etcd

systemctl enable etcd