CentOS deployment Etcd cluster
I. introduction of the environment
Operating system information: CentOS 7 64-bit
Server information:
192.168.80.130 Etcd-master
192.168.80.131 Etcd-node1
192.168.80.132 Etcd-node2
II. Pre-deployment preparation
1. Set secret-free login
[Master]
[root@Etcd-master ~] # ssh-keygen
[root@Etcd-master] # ssh-copy-id-I / root/.ssh/id_rsa.pub Etcd-node1
[root@Etcd-master] # ssh-copy-id-I / root/.ssh/id_rsa.pub Etcd-node2
2. Operate on all machines
A, add hosts
[root@Etcd-master] # 192.168.80.130 Etcd-master
[root@Etcd-master] # 192.168.80.131 Etcd-node1
[root@Etcd-master] # 192.168.80.132 Etcd-node2
B. Synchronization time
[root@Etcd-master ~] # yum-y lrzsz git wget python-devel ntp net-tools curl cmake epel-release rpmdevtools openssl-devel kernel-devel gcc redhat-rpm-config bridge-utils
[root@Etcd-master ~] # yum groupinstall "Development Tools"-y
[root@Etcd-master ~] # cp-Rf / usr/share/zoneinfo/Asia/Shanghai / etc/localtime
[root@Etcd-master ~] # ntpdate 133.100.11.8
[root@Etcd-master ~] # sed-I's ZONE= Zone = "America/New_York" # ZONE= "Asia/Shanghai" # g'/ etc/sysconfig/clock
[root@Etcd-master] # hwclock-w
[root@Etcd-master] # date-R
3. Deploy Etcd
[Master]
1. Install and configure Master nodes
[root@Etcd-master ~] # yum-y install etcd
[root@Etcd-master ~] # cat / etc/etcd/etcd.conf
# [member]
ETCD_NAME= "etcd-master"
ETCD_DATA_DIR= "/ var/lib/etcd/default.etcd"
# ETCD_WAL_DIR= ""
# ETCD_SNAPSHOT_COUNT= "10000"
# ETCD_HEARTBEAT_INTERVAL= "100s"
# ETCD_ELECTION_TIMEOUT= "1000"
ETCD_LISTEN_PEER_URLS= "http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS= "http://0.0.0.0:4001,http://0.0.0.0:2379"
# ETCD_MAX_SNAPSHOTS= "5"
# ETCD_MAX_WALS= "5"
# ETCD_CORS= ""
#
# [cluster]
ETCD_INITIAL_ADVERTISE_PEER_URLS= "http://etcd-master:2380"
# if you use different ETCD_NAME (e.g. Test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test= http://..."
ETCD_INITIAL_CLUSTER= "etcd-node1= http://etcd-node1:2380,etcd-node2=http://etcd-node2:2380,etcd-master=http://etcd-master:2380"
ETCD_INITIAL_CLUSTER_STATE= "new"
ETCD_INITIAL_CLUSTER_TOKEN= "etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS= "http://Etcd-master:2379,http://Etcd-master:4001"
[Node]
2. Install and configure Node1 nodes
[root@Etcd-node1 ~] # yum-y install etcd
[root@Etcd-node1 ~] # cat / etc/etcd/etcd.conf
# [member]
ETCD_NAME= "etcd-node1"
ETCD_DATA_DIR= "/ var/lib/etcd/default.etcd"
# ETCD_WAL_DIR= ""
# ETCD_SNAPSHOT_COUNT= "10000"
# ETCD_HEARTBEAT_INTERVAL= "100s"
# ETCD_ELECTION_TIMEOUT= "1000"
ETCD_LISTEN_PEER_URLS= "http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS= "http://0.0.0.0:4001,http://0.0.0.0:2379"
# ETCD_MAX_SNAPSHOTS= "5"
# ETCD_MAX_WALS= "5"
# ETCD_CORS= ""
#
# [cluster]
ETCD_INITIAL_ADVERTISE_PEER_URLS= "http://etcd-node1:2380"
# if you use different ETCD_NAME (e.g. Test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test= http://..."
ETCD_INITIAL_CLUSTER= "etcd-node1= http://etcd-node1:2380,etcd-node2=http://etcd-node2:2380,etcd-master=http://etcd-master:2380"
ETCD_INITIAL_CLUSTER_STATE= "new"
ETCD_INITIAL_CLUSTER_TOKEN= "etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS= "http://etcd-node1:2379,http://etcd-node1:4001"
3. Install and configure Node2 nodes:
[root@Etcd-node2 ~] # yum-y install etcd
[root@Etcd-node2 ~] # cat / etc/etcd/etcd.conf
# [member]
ETCD_NAME= "etcd-node2"
ETCD_DATA_DIR= "/ var/lib/etcd/default.etcd"
# ETCD_WAL_DIR= ""
# ETCD_SNAPSHOT_COUNT= "10000"
# ETCD_HEARTBEAT_INTERVAL= "100s"
# ETCD_ELECTION_TIMEOUT= "1000"
ETCD_LISTEN_PEER_URLS= "http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS= "http://0.0.0.0:4001,http://0.0.0.0:2379"
# ETCD_MAX_SNAPSHOTS= "5"
# ETCD_MAX_WALS= "5"
# ETCD_CORS= ""
#
# [cluster]
ETCD_INITIAL_ADVERTISE_PEER_URLS= "http://etcd-node2:2380"
# if you use different ETCD_NAME (e.g. Test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test= http://..."
ETCD_INITIAL_CLUSTER= "etcd-node1= http://etcd-node1:2380,etcd-node2=http://etcd-node2:2380,etcd-master=http://etcd-master:2380"
ETCD_INITIAL_CLUSTER_STATE= "new"
ETCD_INITIAL_CLUSTER_TOKEN= "etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS= "http://etcd-node2:2379,http://etcd-node2:4001"
4. Start the Etcd service
[master]
[root@Etcd-master ~] # systemctl restart etcd
[node1]
[root@Etcd-node1 ~] # systemctl restart etcd
[node2]
[root@Etcd-node2 ~] # systemctl restart etcd
5. Check the service status
[master]
[root@Etcd-master ~] # etcdctl member list
6c74f3fd7534bb5: name=etcd-node1 peerURLs= http://etcd-node1:2380 clientURLs= http://etcd-node1:2379,http://etcd-node1:4001 isLeader=false
A57a17f287dbe7bb: name=etcd-node2 peerURLs= http://etcd-node2:2380 clientURLs= http://etcd-node2:2379,http://etcd-node2:4001 isLeader=true
Ffe21a7812eb7c5f: name=etcd-master peerURLs= http://etcd-master:2380 clientURLs= isLeader=false
[node1]
[root@Etcd-node1 ~] # etcdctl member list
6c74f3fd7534bb5: name=etcd-node1 peerURLs= http://etcd-node1:2380 clientURLs= http://etcd-node1:2379,http://etcd-node1:4001 isLeader=false
A57a17f287dbe7bb: name=etcd-node2 peerURLs= http://etcd-node2:2380 clientURLs= http://etcd-node2:2379,http://etcd-node2:4001 isLeader=true
Ffe21a7812eb7c5f: name=etcd-master peerURLs= http://etcd-master:2380 clientURLs= isLeader=false
[node2]
[root@Etcd-node2 ~] # etcdctl member list
6c74f3fd7534bb5: name=etcd-node1 peerURLs= http://etcd-node1:2380 clientURLs= http://etcd-node1:2379,http://etcd-node1:4001 isLeader=false
A57a17f287dbe7bb: name=etcd-node2 peerURLs= http://etcd-node2:2380 clientURLs= http://etcd-node2:2379,http://etcd-node2:4001 isLeader=true
Ffe21a7812eb7c5f: name=etcd-master peerURLs= http://etcd-master:2380 clientURLs= isLeader=false
Test the synchronization of the cluster
[master]
[root@Etcd-master ~] # etcdctl set zlyangdir/zlyangkeys0 0
0
[root@Etcd-master ~] # etcdctl ls zlyangdir
Zlyangdir/zlyangkeys0
[root@Etcd-master ~] # etcdctl get zlyangdir/zlyangkeys0
0
[node1]
[root@Etcd-node1 ~] # etcdctl ls zlyangdir
Zlyangdir/zlyangkeys0
[root@Etcd-node1 ~] # etcdctl get zlyangdir/zlyangkeys0
0
[node2]
[root@Etcd-node2 ~] # etcdctl ls zlyangdir
Zlyangdir/zlyangkeys0
[root@Etcd-node2 ~] # etcdctl get zlyangdir/zlyangkeys0
0
Official deployment plan: https://coreos.com/etcd/docs/latest/op-guide/clustering.html
So far, the Etcd cluster has been set up. If you have any questions, please contact: DBA_Master@163.com
