linux下zookeeper安装

1）环境介绍

vmware15.5
centos7
jdk8

虚拟服务器配置（三台服务器）：
192.168.116.61 centos61
192.168.116.62 centos62
192.168.116.63 centos63

2）下载zookeeper

https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/

打开链接 stable目录，
apache-zookeeper-3.5.6-bin.tar.gz
apache-zookeeper-3.5.6.tar.gz

下载第一个包(带bin的包)，
上传到服务器上，解压缩：

[root@centos3 temp]# tar -zxvf apache-zookeeper-3.5.6-bin.tar.gz -C /home/soft
[root@centos3 temp]# cd /home/soft
[root@centos3 soft]# cd apache-zookeeper-3.5.6-bin
[root@centos3 apache-zookeeper-3.5.6-bin]# ll
total 32
drwxr-xr-x. 2 root root   232 Oct  9 04:14 bin
drwxr-xr-x. 2 root root    77 Oct  9 04:14 conf
drwxr-xr-x. 5 root root  4096 Oct  9 04:15 docs
drwxr-xr-x. 2 root root  4096 Dec  3 22:59 lib
-rw-r--r--. 1 root root 11358 Oct  5 19:27 LICENSE.txt
-rw-r--r--. 1 root root   432 Oct  9 04:14 NOTICE.txt
-rw-r--r--. 1 root root  1560 Oct  9 04:14 README.md
-rw-r--r--. 1 root root  1347 Oct  5 19:27 README_packaging.txt

3）配置zoo.cfg

进入conf目录，配置zoo.cfg：

[root@centos3 data]# cd conf
[root@centos3 conf]# cp zoo_sample.cfg zoo.cfg
[root@centos3 conf]# ll
total 16
-rw-r--r--. 1 root root  535 Oct  5 19:27 configuration.xsl
-rw-r--r--. 1 root root 2712 Oct  5 19:27 log4j.properties
-rw-r--r--. 1 root root  922 Dec  3 23:05 zoo.cfg
-rw-r--r--. 1 root root  922 Oct  9 04:14 zoo_sample.cfg
[root@centos3 conf]# vi zoo.cfg

配置文件内容：

# 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/data/zookeeper/data
dataLogDir=/home/data/zookeeper/log
# 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.61=centos61:2888:3888
server.62=centos62:2888:3888
server.63=centos63:2888:3888

简洁版：

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/home/data/zookeeper/data
dataLogDir=/home/data/zookeeper/log
clientPort=2181
server.61=centos61:2888:3888
server.62=centos62:2888:3888
server.63=centos63:2888:3888

注意：需要先创建这两个目录：
dataDir=/home/data/zookeeper/data
dataLogDir=/home/data/zookeeper/log

4）配置myid

进入dataDir配置的目录：/home/data/zookeeper/data

[root@centos3 apache-zookeeper-3.5.6-bin]# cd /home/data/zookeeper/
[root@centos3 zookeeper]# cd data
[root@centos3 data]# ll
total 0
[root@centos3 data]# echo '61'>myid
[root@centos3 data]# ll
total 4
-rw-r--r--. 1 root root 3 Dec  3 23:12 myid
[root@centos3 data]# more myid
61

三台服务器分别配置61, 62, 63，
与zoo.cfg中server.N的序号一致：
server.61=centos61:2888:3888
server.62=centos62:2888:3888
server.63=centos63:2888:3888

5）启动

分别启动三台服务器：

[root@centos3 apache-zookeeper-3.5.6-bin]# cd bin
[root@centos3 bin]# ./zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/soft/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@centos1 bin]# jps
3816 QuorumPeerMain
3854 Jps

查看状态：

[root@centos1 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/soft/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower

[root@centos2 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/soft/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower

[root@centos3 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/soft/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader

6）异常排查

1、找不到主类，启动时报如下异常：

./zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/soft/apache-zookeeper-3.5.6/bin/../conf/zoo.cfg
Error: Could not find or load main class org.apache.zookeeper.server.quorum.QuorumPeerMain

原因：
这是下载错了，一般一个版本有两个包：
apache-zookeeper-3.5.6-bin.tar.gz
apache-zookeeper-3.5.6.tar.gz

需要下载带有bin的包，它是编译好的版本，
另一个是源码版本，看一下它的目录就明白了。

apache-zookeeper-3.5.6-bin.tar.gz
lib目录下是编译好的jar文件：

[root@centos1 soft]# cd apache-zookeeper-3.5.6-bin
[root@centos1 apache-zookeeper-3.5.6-bin]# ll
total 32
drwxr-xr-x. 2 root root   232 Oct  9 04:14 bin
drwxr-xr-x. 2 root root    77 Oct  9 04:14 conf
drwxr-xr-x. 5 root root  4096 Oct  9 04:15 docs
drwxr-xr-x. 2 root root  4096 Dec  3 23:01 lib
-rw-r--r--. 1 root root 11358 Oct  5 19:27 LICENSE.txt
-rw-r--r--. 1 root root   432 Oct  9 04:14 NOTICE.txt
-rw-r--r--. 1 root root  1560 Oct  9 04:14 README.md
-rw-r--r--. 1 root root  1347 Oct  5 19:27 README_packaging.txt
[root@centos1 apache-zookeeper-3.5.6-bin]# cd lib
[root@centos1 lib]# ll
total 7980
-rw-r--r--. 1 root root   20437 Oct  5 21:29 audience-annotations-0.5.0.jar
-rw-r--r--. 1 root root   41123 Oct  5 21:29 commons-cli-1.2.jar
-rw-r--r--. 1 root root   66894 Oct  5 21:32 jackson-annotations-2.9.10.jar
-rw-r--r--. 1 root root  325636 Oct  5 21:32 jackson-core-2.9.10.jar
-rw-r--r--. 1 root root 1348567 Oct  5 21:32 jackson-databind-2.9.10.jar
-rw-r--r--. 1 root root   95806 Oct  5 21:32 javax.servlet-api-3.1.0.jar
-rw-r--r--. 1 root root  202738 Oct  5 21:32 jetty-http-9.4.17.v20190418.jar
-rw-r--r--. 1 root root  156436 Oct  5 21:32 jetty-io-9.4.17.v20190418.jar
-rw-r--r--. 1 root root  116281 Oct  5 21:32 jetty-security-9.4.17.v20190418.jar
-rw-r--r--. 1 root root  647357 Oct  5 21:32 jetty-server-9.4.17.v20190418.jar
-rw-r--r--. 1 root root  121159 Oct  5 21:32 jetty-servlet-9.4.17.v20190418.jar
-rw-r--r--. 1 root root  526135 Oct  5 21:32 jetty-util-9.4.17.v20190418.jar
-rw-r--r--. 1 root root  208781 Oct  5 21:32 jline-2.11.jar
-rw-r--r--. 1 root root    1535 Oct  5 19:27 jline-2.11.LICENSE.txt
-rw-r--r--. 1 root root   23931 Oct  5 21:32 json-simple-1.1.1.jar
-rw-r--r--. 1 root root   11366 Oct  5 19:27 json-simple-1.1.1.LICENSE.txt
-rw-r--r--. 1 root root  489884 Oct  5 21:32 log4j-1.2.17.jar
-rw-r--r--. 1 root root   11366 Oct  5 19:27 log4j-1.2.17.LICENSE.txt
-rw-r--r--. 1 root root  277351 Oct  5 21:32 netty-buffer-4.1.42.Final.jar
-rw-r--r--. 1 root root   11366 Oct  9 04:14 netty-buffer-4.1.42.Final.LICENSE.txt
-rw-r--r--. 1 root root  318187 Oct  5 21:32 netty-codec-4.1.42.Final.jar
-rw-r--r--. 1 root root   11366 Oct  9 04:14 netty-codec-4.1.42.Final.LICENSE.txt
-rw-r--r--. 1 root root  603879 Oct  5 21:32 netty-common-4.1.42.Final.jar
-rw-r--r--. 1 root root   11366 Oct  9 04:14 netty-common-4.1.42.Final.LICENSE.txt
-rw-r--r--. 1 root root  436951 Oct  5 21:32 netty-handler-4.1.42.Final.jar
-rw-r--r--. 1 root root   11366 Oct  9 04:14 netty-handler-4.1.42.Final.LICENSE.txt
-rw-r--r--. 1 root root   32843 Oct  5 21:32 netty-resolver-4.1.42.Final.jar
-rw-r--r--. 1 root root   11366 Oct  9 04:14 netty-resolver-4.1.42.Final.LICENSE.txt
-rw-r--r--. 1 root root  473465 Oct  5 21:32 netty-transport-4.1.42.Final.jar
-rw-r--r--. 1 root root   11366 Oct  9 04:14 netty-transport-4.1.42.Final.LICENSE.txt
-rw-r--r--. 1 root root  124118 Oct  5 21:32 netty-transport-native-epoll-4.1.42.Final.jar
-rw-r--r--. 1 root root   11366 Oct  9 04:14 netty-transport-native-epoll-4.1.42.Final.LICENSE.txt
-rw-r--r--. 1 root root   32993 Oct  5 21:32 netty-transport-native-unix-common-4.1.42.Final.jar
-rw-r--r--. 1 root root   11366 Oct  9 04:14 netty-transport-native-unix-common-4.1.42.Final.LICENSE.txt
-rw-r--r--. 1 root root    1133 Oct  5 19:27 slf4j-1.7.25.LICENSE.txt
-rw-r--r--. 1 root root   41203 Oct  5 21:32 slf4j-api-1.7.25.jar
-rw-r--r--. 1 root root   12244 Oct  5 21:32 slf4j-log4j12-1.7.25.jar
-rw-r--r--. 1 root root  984810 Oct  9 04:19 zookeeper-3.5.6.jar
-rw-r--r--. 1 root root  250329 Oct  9 04:18 zookeeper-jute-3.5.6.jar

apache-zookeeper-3.5.6.tar.gz
**zookeeper-**开头的目录下，都是源代码

[root@centos3 apache-zookeeper-3.5.6]# ll
total 172
drwxr-xr-x.  2 root root   232 Oct  9 04:14 bin
-rw-rw-r--.  1 root root 94368 Oct  9 04:14 build.xml
drwxr-xr-x.  2 root root    77 Oct  9 04:14 conf
-rw-rw-r--.  1 root root   411 Oct  5 19:27 excludeFindBugsFilter.xml
-rw-rw-r--.  1 root root  1709 Oct  5 19:27 ivysettings.xml
-rw-rw-r--.  1 root root  7810 Oct  9 04:14 ivy.xml
-rw-r--r--.  1 root root 11358 Oct  5 19:27 LICENSE.txt
-rw-r--r--.  1 root root   432 Oct  9 04:14 NOTICE.txt
-rw-rw-r--.  1 root root  1625 Oct  5 19:27 owaspSuppressions.xml
-rwxrwxr-x.  1 root root 28334 Oct  9 04:14 pom.xml
-rw-r--r--.  1 root root  1560 Oct  9 04:14 README.md
-rw-r--r--.  1 root root  1347 Oct  5 19:27 README_packaging.txt
drwxrwxr-x.  3 root root    32 Oct  9 04:16 zookeeper-assembly
drwxrwxr-x.  3 root root    47 Oct  9 04:16 zookeeper-client
drwxrwxr-x. 12 root root  4096 Oct  9 04:15 zookeeper-contrib
drwxrwxr-x.  3 root root    32 Oct  9 04:15 zookeeper-docs
drwxrwxr-x.  3 root root    35 Oct  5 19:27 zookeeper-it
drwxrwxr-x.  3 root root    32 Oct  9 04:15 zookeeper-jute
drwxrwxr-x.  5 root root   176 Oct  9 04:16 zookeeper-recipes
drwxrwxr-x.  3 root root    32 Oct  9 04:16 zookeeper-server

2、启动失败，无法找到myid：
zookeeper无法找到myid文件（myid file is missing）

[root@centos3 bin]# ./zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/soft/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
Starting zookeeper ... FAILED TO START
[root@centos3 bin]# cd ../logs
[root@centos3 logs]# ll
total 4
-rw-r--r--. 1 root root 1385 Dec  3 23:08 zookeeper-root-server-centos3.out
[root@centos3 logs]# more zookeeper-root-server-centos3.out
2019-12-03 23:08:22,025 [myid:] - INFO  [main:QuorumPeerConfig@133] - Reading configuration from: /home/soft/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
2019-12-03 23:08:22,038 [myid:] - INFO  [main:QuorumPeerConfig@385] - clientPortAddress is 0.0.0.0/0.0.0.0:2181
2019-12-03 23:08:22,039 [myid:] - INFO  [main:QuorumPeerConfig@389] - secureClientPort is not set
2019-12-03 23:08:22,046 [myid:] - ERROR [main:QuorumPeerMain@89] - Invalid config, exiting abnormally
org.apache.zookeeper.server.quorum.QuorumPeerConfig$ConfigException: Error processing /home/soft/apache-zookeeper-3.5.6-bin/bin/../conf/zoo.cfg
        at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:154)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:113)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:82)
Caused by: java.lang.IllegalArgumentException: myid file is missing
        at org.apache.zookeeper.server.quorum.QuorumPeerConfig.checkValidity(QuorumPeerConfig.java:734)
        at org.apache.zookeeper.server.quorum.QuorumPeerConfig.setupQuorumPeerConfig(QuorumPeerConfig.java:605)
        at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parseProperties(QuorumPeerConfig.java:420)
        at org.apache.zookeeper.server.quorum.QuorumPeerConfig.parse(QuorumPeerConfig.java:150)
        ... 2 more
Invalid config, exiting abnormally

原因：
myid配置错误或没有配置，
myid的正确配置路径是根据zoo.cfg的配置项
dataDir=/home/data/zookeeper/data
在它的路径下生成一个myid文件，
而不是在安装目录/data/myid