ZooKeeper註冊中心安裝(單節點)
1.下載zookeeper
下載地址:https://archive.apache.org/dist/zookeeper/,這裏我們使用3.4.6版本。
[winner-0715@localhost software]$ wget https://archive.apache.org/dist/zookeeper/zookeeper-3.4.6/zookeeper-3.4.6.tar.gz
2.解壓 zookeeper 安裝包
[winner-0715@localhost software]$ tar -zxvf zookeeper-3.4.6.tar.gz
3.在zookeeper-3.4.6 目錄下創建data數據目錄和logs日誌目錄:
[winner-0715@localhost software]$ cd zookeeper-3.4.6
[winner-0715@localhost zookeeper-3.4.6]$ mkdir data
[winner-0715@localhost zookeeper-3.4.6]$ mkdir logs
4.將 zookeeper-3.4.6/conf 目錄下的 zoo_sample.cfg 文件拷貝一份,命名為為zoo.cfg
[winner-0715@localhost zookeeper-3.4.6]$ cd conf/
[winner-0715@localhost conf]$ ll
total 12
-rw-rw-r--. 1 winner-0715 winner-0715 535 Feb 20 2014 configuration.xsl
-rw-rw-r--. 1 winner-0715 winner-0715 2161 Feb 20 2014 log4j.properties
-rw-rw-r--. 1 winner-0715 winner-0715 922 Feb 20 2014 zoo_sample.cfg
[winner-0715@localhost conf]$ cp zoo_sample.cfg zoo.cfg
[winner-0715@localhost conf]$ ll
total 16
-rw-rw-r--. 1 winner-0715 winner-0715 535 Feb 20 2014 configuration.xsl
-rw-rw-r--. 1 winner-0715 winner-0715 2161 Feb 20 2014 log4j.properties
-rw-rw-r--. 1 winner-0715 winner-0715 922 Dec 30 11:52 zoo.cfg
-rw-rw-r--. 1 winner-0715 winner-0715 922 Feb 20 2014 zoo_sample.cfg
5.修改 zoo.cfg 配置文件:
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/home/winner-0715/software/zookeeper-3.4.6/data
dataLogDir=/home/winner-0715/software/zookeeper-3.4.6/logs
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# 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=192.168.41.128:2888:3888
其中,
2888 端口號是 zookeeper 服務之間通信的端口。
3888 是 zookeeper 與其他應用程序通信的端口。
edu-provider-01 是在 hosts 中已映射了 IP 的主機名。
initLimit:這個配置項是用來配置 Zookeeper 接受客戶端(這裏所說的客戶端不是用戶連接 Zookeeper 服務器的客戶端,而是 Zookeeper 服務器集群中連接到Leader 的 Follower 服務器)初始化連接時最長能忍受多少個心跳時間間隔數。
當已經超過 10 個心跳的時間(也就是 tickTime)長度後 Zookeeper 服務器還沒有收到客戶端的返回信息,那麽表明這個客戶端連接失敗。總的時間長度就是5*2000=10 秒。
syncLimit:這個配置項標識 Leader 與 Follower 之間發送消息,請求和應答時間長度,最長不能超過多少個 tickTime 的時間長度,總的時間長度就是 2*2000=4秒。
server.A=B:C:D:其中 A 是一個數字,表示這個是第幾號服務器; B 是這個服務器的 IP 地址或/etc/hosts 文件中映射了 IP 的主機名; C 表示的是這個服務器與集群中的 Leader 服務器交換信息的端口; D 表示的是萬一集群中的 Leader 服務
器掛了,需要一個端口來重新進行選舉,選出一個新的 Leader,而這個端口就是用來執行選舉時服務器相互通信的端口。如果是偽集群的配置方式,由於 B 都是
一樣,所以不同的 Zookeeper 實例通信端口號不能一樣,所以要給它們分配不同的端口號
6.在 dataDir=/home/winner-0715/software/zookeeper-3.4.6/data下創建 myid 文件
編輯 myid 文件,並在對應的 IP 的機器上輸入對應的編號。如在 zookeeper 上, myid文件內容就是 1。 如果只在單點上進行安裝配置, 那麽只有一個 server.1。
[winner-0715@localhost data]$ vim myid
[winner-0715@localhost data]$ ll
total 4
-rw-rw-r--. 1 winner-0715 winner-0715 2 Dec 30 12:11 myid
[winner-0715@localhost data]$ cat myid
1
7.配置zookeeper的環境變量。
[winner-0715@localhost ~]$ vim .bash_profile
[winner-0715@localhost ~]$ cat .bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin
export PATH
#zookeeper env
export ZOOKEEPER_HOME=/home/winner-0715/software/zookeeper-3.4.6
export PATH=$ZOOKEEPER_HOME/bin:$PATH
.bash_profile在用戶目錄下。
8. 在防火墻中打開要用到的端口 2181、 2888、 3888
切換到 root 用戶權限,執行以下命令:
[root@localhost winner-0715]#chkconfig iptables on
[root@localhost winner-0715]#service iptables start
[root@localhost winner-0715]#vi /etc/sysconfig/iptables
[root@localhost winner-0715]# cat /etc/sysconfig/iptables
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 2181 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 2888 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3888 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
看下22端口就知道怎麽改了!
重啟防火墻:
[root@localhost winner-0715]# service iptables restart
iptables: Flushing firewall rules: [ OK ]
iptables: Setting chains to policy ACCEPT: filter [ OK ]
iptables: Unloading modules: [ OK ]
iptables: Applying firewall rules: [ OK ]
查看防火墻端口狀態:
[root@localhost winner-0715]# service iptables status
Table: filter
1Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
2 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
4 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
5 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2181
6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2888
7 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:3888
8 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain FORWARD (policy ACCEPT)
num target prot opt source destination
1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain OUTPUT (policy ACCEPT)
num target prot opt source destination
9.啟動並測試 zookeeper(要用一般用戶啟動,不要用 root) :
(1)因為配置了環境變量,所以不需要切換到zookeeper的bin目錄下就可以執行啟動命令。
[winner-0715@localhost ~]$ zkServer.sh start
JMX enabled by default
Using config: /home/winner-0715/software/zookeeper-3.4.6/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
(2)輸入 jps 命令查看進程:
[winner-0715@localhost ~]$ jps
4954 Jps
4924 QuorumPeerMain
其中, QuorumPeerMain 是 zookeeper 進程,啟動正常
(3) 查看狀態:
[winner-0715@localhost ~]$ zkServer.sh status
JMX enabled by default
Using config: /home/winner-0715/software/zookeeper-3.4.6/bin/../conf/zoo.cfg
Mode: standalone
(4) 查看 zookeeper 服務輸出信息:
由於服務信息輸出文件在/home/winner-0715/zookeeper-3.4.6/bin/zookeeper.out
$ tail -500f zookeeper.out
10.停止 zookeeper 進程:
[winner-0715@localhost bin]$ ./zkServer.sh stop
JMX enabled by default
Using config: /home/winner-0715/software/zookeeper-3.4.6/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
11.配置zookeeper開機啟動
編輯/etc/rc.local 文件,加入:
su winner-0715 -c ‘/home/winner-0715/zookeeper-3.4.6/bin/zkServer.sh start‘
-c:call,調用後面的腳本的意思。
ZooKeeper註冊中心安裝(單節點)