etcd 多臺服務(wù)器集群

下載安裝 etcd

$ mkdir -p $GOPATH/src/github.com/coreos $ cd !$ $ git clone https://github.com/coreos/etcd.git $ cd etcd $ ./build

啟動服務(wù)

每個節(jié)點都要執(zhí)行以下配置，HOST_1、HOST_2、HOST_3 分別設(shè)置為多臺服務(wù)器的IP

TOKEN=token-01 CLUSTER_STATE=new NAME_1=machine-1 NAME_2=machine-2 NAME_3=machine-3 HOST_1=192.168.1.126 HOST_2=192.168.1.119 HOST_3=192.168.1.103 CLUSTER=${NAME_1}=http://${HOST_1}:2380,${NAME_2}=http://${HOST_2}:2380,${NAME_3}=http://${HOST_3}:2380

machine 1 執(zhí)行如下命令

$ cd $GOPATH/src/github.com/coreos/etcd/bin# For machine 1 THIS_NAME=${NAME_1} THIS_IP=${HOST_1} ./etcd --data-dir=data.etcd --name ${THIS_NAME} --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380 --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379 --initial-cluster ${CLUSTER} --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}

machine 2 執(zhí)行如下命令

$ cd $GOPATH/src/github.com/coreos/etcd/bin# For machine 2 THIS_NAME=${NAME_2} THIS_IP=${HOST_2} ./etcd --data-dir=data.etcd --name ${THIS_NAME} --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380 --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379 --initial-cluster ${CLUSTER} --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}

machine 3 執(zhí)行如下命令

$ cd $GOPATH/src/github.com/coreos/etcd/bin# For machine 3 THIS_NAME=${NAME_3} THIS_IP=${HOST_3} ./etcd --data-dir=data.etcd --name ${THIS_NAME} --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380 --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379 --initial-cluster ${CLUSTER} --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}

檢測服務(wù)器運行是否正常

$ cd $GOPATH/src/github.com/coreos/etcd/binexport ETCDCTL_API=3 HOST_1=192.168.1.126 HOST_2=192.168.1.119 HOST_3=192.168.1.103 ENDPOINTS=$HOST_1:2379,$HOST_2:2379,$HOST_3:2379./etcdctl --endpoints=$ENDPOINTS member list

存儲數(shù)據(jù)

./etcdctl --endpoints=$ENDPOINTS put foo "Hello World!"./etcdctl --endpoints=$ENDPOINTS get foo ./etcdctl --endpoints=$ENDPOINTS --write-out="json" get foo

根據(jù)前綴查詢

./etcdctl --endpoints=$ENDPOINTS put web1 value1 ./etcdctl --endpoints=$ENDPOINTS put web2 value2 ./etcdctl --endpoints=$ENDPOINTS put web3 value3./etcdctl --endpoints=$ENDPOINTS get web --prefixweb1 value1 web2 value2 web3 value3

刪除

./etcdctl --endpoints=$ENDPOINTS put key myvalue ./etcdctl --endpoints=$ENDPOINTS del key./etcdctl --endpoints=$ENDPOINTS put k1 value1 ./etcdctl --endpoints=$ENDPOINTS put k2 value2 ./etcdctl --endpoints=$ENDPOINTS del k --prefix

事務(wù)寫入

$ ./etcdctl --endpoints=$ENDPOINTS put user1 bad OK$ ./etcdctl --endpoints=$ENDPOINTS txn --interactivecompares: // 輸入以下內(nèi)容，輸入結(jié)束按 兩次回車 value("user1") = "bad" //如果 user1 = bad，則執(zhí)行 get user1 success requests (get, put, del): get user1 //如果 user1 != bad，則執(zhí)行 put user1 good failure requests (get, put, del): put user1 good // 運行結(jié)果，執(zhí)行 success SUCCESSuser1 bad$ ./etcdctl --endpoints=$ENDPOINTS txn --interactive compares: value("user1") = "111" // 如果 user1 = 111，則執(zhí)行 get user1 success requests (get, put, del): get user1 //如果 user1 != 111，則執(zhí)行 put user1 2222 failure requests (get, put, del): put user1 2222 // 運行結(jié)果，執(zhí)行 failure FAILUREOK$ ./etcdctl --endpoints=$ENDPOINTS get user1 user1 2222

watch

// 當 stock1 的數(shù)值改變（ put 方法）的時候，watch 會收到通知 ./etcdctl --endpoints=$ENDPOINTS watch stock1// 新打開終端 $ cd $GOPATH/src/github.com/coreos/etcd/binexport ETCDCTL_API=3 HOST_1=192.168.1.126 HOST_2=192.168.1.119 HOST_3=192.168.1.103 ENDPOINTS=$HOST_1:2379,$HOST_2:2379,$HOST_3:2379 ./etcdctl --endpoints=$ENDPOINTS put stock1 1000./etcdctl --endpoints=$ENDPOINTS watch stock --prefix./etcdctl --endpoints=$ENDPOINTS put stock1 10 ./etcdctl --endpoints=$ENDPOINTS put stock2 20

更多操作

https://coreos.com/etcd/docs/latest/demo.html

總結(jié)

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