kubernetes部署etcd集群
部署环境：CentOS Linux release 7.2 64位
10.10.0.103 etcd master
10.10.0.49 etcd follower
master安装过程：
# yum update
# yum install -y etcd
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#
ETCD_NAME=etcd1
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_WAL_DIR=""
#ETCD_SNAPSHOT_COUNT="10000"
ETCD_HEARTBEAT_INTERVAL="1000"
ETCD_ELECTION_TIMEOUT="10000"
ETCD_LISTEN_PEER_URLS="http://10.10.0.103:2380"
ETCD_LISTEN_CLIENT_URLS="http://10.10.0.103:2379,http://127.0.0.1:2379"
#ETCD_MAX_SNAPSHOTS="5"
#ETCD_MAX_WALS="5"
#ETCD_CORS=""
#
#
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.10.0.103:2380"
# if you use different ETCD_NAME (e.g. test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
ETCD_INITIAL_CLUSTER="etcd1=http://10.10.0.103:2380,etcd2=http://10.10.0.49:2380"
#ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://10.10.0.103:2379"
#ETCD_DISCOVERY=""
#ETCD_DISCOVERY_SRV=""
#ETCD_DISCOVERY_FALLBACK="proxy"
#ETCD_DISCOVERY_PROXY=""
#ETCD_STRICT_RECONFIG_CHECK="false"
#ETCD_AUTO_COMPACTION_RETENTION="0"
#
#
#ETCD_PROXY="off"
#ETCD_PROXY_FAILURE_WAIT="5000"
#ETCD_PROXY_REFRESH_INTERVAL="30000"
#ETCD_PROXY_DIAL_TIMEOUT="1000"
#ETCD_PROXY_WRITE_TIMEOUT="5000"
#ETCD_PROXY_READ_TIMEOUT="0"
#
#
#ETCD_CERT_FILE=""
#ETCD_KEY_FILE=""
#ETCD_CLIENT_CERT_AUTH="false"
#ETCD_TRUSTED_CA_FILE=""
#ETCD_AUTO_TLS="false"
#ETCD_PEER_CERT_FILE=""
#ETCD_PEER_KEY_FILE=""
#ETCD_PEER_CLIENT_CERT_AUTH="false"
#ETCD_PEER_TRUSTED_CA_FILE=""
#ETCD_PEER_AUTO_TLS="false"
#
#
#ETCD_DEBUG="false"
# examples for -log-package-levels etcdserver=WARNING,security=DEBUG
#ETCD_LOG_PACKAGE_LEVELS=""
#
#
#ETCD_ENABLE_PPROF="false"
#ETCD_METRICS="basic"
follower安装过程：
# yum update
# yum install -y etcd
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#
ETCD_NAME=etcd2
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_WAL_DIR=""
#ETCD_SNAPSHOT_COUNT="10000"
ETCD_HEARTBEAT_INTERVAL="1000"
ETCD_ELECTION_TIMEOUT="10000"
ETCD_LISTEN_PEER_URLS="http://10.10.0.49:2380"
ETCD_LISTEN_CLIENT_URLS="http://10.10.0.49:2379,http://127.0.0.1:2379"
#ETCD_MAX_SNAPSHOTS="5"
#ETCD_MAX_WALS="5"
#ETCD_CORS=""
#
#
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://10.10.0.49:2380"
# if you use different ETCD_NAME (e.g. test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
ETCD_INITIAL_CLUSTER="etcd1=http://10.10.0.103:2380,etcd2=http://10.10.0.49:2380"
#ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://10.10.0.49:2379"
#ETCD_DISCOVERY=""
#ETCD_DISCOVERY_SRV=""
#ETCD_DISCOVERY_FALLBACK="proxy"
#ETCD_DISCOVERY_PROXY=""
#ETCD_STRICT_RECONFIG_CHECK="false"
#ETCD_AUTO_COMPACTION_RETENTION="0"
#
#
#ETCD_PROXY="off"
#ETCD_PROXY_FAILURE_WAIT="5000"
#ETCD_PROXY_REFRESH_INTERVAL="30000"
#ETCD_PROXY_DIAL_TIMEOUT="1000"
#ETCD_PROXY_WRITE_TIMEOUT="5000"
#ETCD_PROXY_READ_TIMEOUT="0"
#
#
#ETCD_CERT_FILE=""
#ETCD_KEY_FILE=""
#ETCD_CLIENT_CERT_AUTH="false"
#ETCD_TRUSTED_CA_FILE=""
#ETCD_AUTO_TLS="false"
#ETCD_PEER_CERT_FILE=""
#ETCD_PEER_KEY_FILE=""
#ETCD_PEER_CLIENT_CERT_AUTH="false"
#ETCD_PEER_TRUSTED_CA_FILE=""
#ETCD_PEER_AUTO_TLS="false"
#
#
#ETCD_DEBUG="false"
# examples for -log-package-levels etcdserver=WARNING,security=DEBUG
#ETCD_LOG_PACKAGE_LEVELS=""
#
#
#ETCD_ENABLE_PPROF="false"
#ETCD_METRICS="basic"
启动master和follower节点上etcd服务：
# systemctl start etcd
查看成员列表：
# etcdctl member list
30e9662cfab160c5: name=etcd2 peerURLs=http://10.10.0.49:2380 clientURLs=http://10.10.0.49:2379 isLeader=true
cedb09f4a212df57: name=etcd1 peerURLs=http://10.10.0.103:2380 clientURLs=http://10.10.0.103:2379 isLeader=false
查看集群状态：
# etcdctl cluster-health
member 30e9662cfab160c5 is healthy: got healthy result from http://10.10.0.49:2379
member cedb09f4a212df57 is healthy: got healthy result from http://10.10.0.103:2379
cluster is healthy
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