下載zookeeper的安裝包
http://zookeeper.apache.org/releases.html 我下載的版本是zookeeper-3.4.10。html
準備三臺服務器
ip地址爲:java
172.16.18.198 172.16.18.199 172.16.18.200
檢查jdk版本,安裝jdk環境,jdk須要1.7以上。linux
1.三臺服務器分別上傳zookeeper安裝包,上傳到/opt/目錄下,而後tar zxvf zookeeper-3.4.10.tar.gzapache
2.拷貝zoo_sample.cfg 爲zoo.cfg 修改/opt/zookeeper-3.4.10/conf/zoo.cfg配置文件,添加以下內容:centos
server.1=172.16.18.198:2888:3888 server.2=172.16.18.199:2888:3888 server.3=172.16.18.200:2888:3888
3.修改zookeeper數據文件存放目錄服務器
dataDir=/data/zookeeper
此時zoo.cfg 配置文件內容爲:app
# The number of milliseconds of each tick tickTime=2000 ##zookeeper單位時間爲2ms # The number of ticks that the initial # synchronization phase can take initLimit=10 ##對於從節點最初鏈接到主節點時的超時時間,單位爲tick值的倍數。即20ms # The number of ticks that can pass between # sending a request and getting an acknowledgement syncLimit=5 ##對於主節點與從節點進行同步操做時的超時時間,單位爲tick值的倍數。即10ms # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. dataDir=/data/zookeeper # the port at which the clients will connect clientPort=2181 ##客戶端連接端口 # the maximum number of client connections. # increase this if you need to handle more clients maxClientCnxns=60 ##客戶端最大連接數 # # Be sure to read the maintenance section of the # administrator guide before turning on autopurge. # # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance # # The number of snapshots to retain in dataDir #autopurge.snapRetainCount=3 # Purge task interval in hours # Set to "0" to disable auto purge feature #autopurge.purgeInterval=1 server.1=172.16.18.198:2888:3888 server.2=172.16.18.199:2888:3888 server.3=172.16.18.200:2888:3888
4.新建myid文件socket
在三臺服務器的數據存放目錄下新建myid文件,並寫入對應的server.num 中的num數字
如:在172.16.18.198上將server.1中1寫入myidide
echo 1 >/data/zookeeper/myid
5.添加環境變量,方便咱們執行腳本命令ui
vi etc/profile 在最後添加以下兩個。
export ZOOKEEPER_HOME=/opt/zookeeper-3.4.9 export PATH=$PATH:$ZOOKEEPER_HOME/bin:$ZOOKEEPER_HOME/conf
保存後從新加載一下:
source /etc/profile
6.修改日誌存放目錄(可選)
vi /opt/zookeeper/bin/zkEnv.sh 找到ZOO_LOG_DIR 和 ZOO_LOG4J_PROP位置
if [ "x${ZOO_LOG_DIR}" = "x" ] then #配置zookeeper日誌輸出存放路徑 ZOO_LOG_DIR="/var/applog/zookeeper" fi if [ "x${ZOO_LOG4J_PROP}" = "x" ] then #配置日誌輸出級別,這裏把幾個級別一併配上 ZOO_LOG4J_PROP="INFO,CONSOLE,ROLLINGFILE,TRACEFILE" fi
編輯conf目錄下log4j.properties
# Define some default values that can be overridden by system properties zookeeper.root.logger=INFO, CONSOLE, ROLLINGFILE, TRACEFILE zookeeper.console.threshold=INFO zookeeper.log.dir=. zookeeper.log.file=zookeeper.log zookeeper.log.threshold=ERROR zookeeper.tracelog.dir=. zookeeper.tracelog.file=zookeeper_trace.log log4j.rootLogger=${zookeeper.root.logger}
完成log的日誌目錄的修改。
7.啓動zookeeper服務
zkServer.sh start來啓動。
zkServer.sh restart (重啓)
zkServer.sh status (查看狀態)
zkServer.sh stop (關閉)
zkServer.sh start-foreground (以打印日誌方式啓動)
三臺服務器分別執行:
zkServer.sh start
而後用 status 檢查下狀態 若是出現 Mode:leader 或者Mode:follower 表示搭建成功。不然前臺執行看一下日誌。
$ zkServer.sh status ZooKeeper JMX enabled by default Using config: /opt/zookeeper-3.4.10/bin/../conf/zoo.cfg Mode: follower
如出現:
2019-04-29 14:04:05,992 [myid:3] - INFO [ListenerThread:QuorumCnxManager$Listener@739] - My election bind port: /172.16.18.200:3888 2019-04-29 14:04:06,019 [myid:3] - INFO [QuorumPeer[myid=3]/0:0:0:0:0:0:0:0:2181:QuorumPeer@865] - LOOKING 2019-04-29 14:04:06,025 [myid:3] - INFO [QuorumPeer[myid=3]/0:0:0:0:0:0:0:0:2181:FastLeaderElection@818] - New election. My id = 3, proposed zxid=0x0 2019-04-29 14:04:06,056 [myid:3] - WARN [WorkerSender[myid=3]:QuorumCnxManager@588] - Cannot open channel to 1 at election address /172.16.18.198:3888 java.net.NoRouteToHostException: 沒有到主機的路由 at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) "zookeeper.log" 303L, 35429C
報這種異常通常有三種狀況:
1):zoo.cfg配置文件中,server.x:2888:3888配置出現錯誤;
2):myid文件內容和server.x不對應,或者myid不在data目錄下;
3):系統防火牆是否在啓動。
我檢查了三種緣由後發現是防火牆running。
centos7下查看防火牆狀態的命令:
firewall-cmd --state
關閉防火牆的命令:
systemctl stop firewalld.service systemctl disable firewalld.service (禁止開機啓動,永久關閉防火牆)
關閉防火牆後重啓便可。
8.驗證是否成功
在命令行中輸入:zkCli.sh -server 172.16.18.198:2181(因爲本人在不一樣的辦公地點在修改該文章,因此ip地址也在變化,知道原理便可)便可鏈接到其中一臺ZooKeeper服務器。其餘自動實現同步,客戶端只須要和一臺保持鏈接便可。出現以下表示連接成功
WATCHER:: WatchedEvent state:SyncConnected type:None path:null [zk: 172.16.18.198:2181(CONNECTED) 0]