1.zookeeper解压的路径由以下可知：
/home/doctor/opt/zookeeper-3.4.6/conf
本地设置3个zookeeper，配置文件为：
zoo2.cfg zoo3.cfg zoo.cfg。
zoo.cfg配置：
# 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/doctor/zookeeper/d_1 # 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=localhost:2887:3887 server.2=localhost:2888:3888 server.3=localhost:2889:3889
zoo2.cfg配置：
# 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/doctor/zookeeper/d_2 # the port at which the clients will connect clientPort=2182 # 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=localhost:2887:3887 server.2=localhost:2888:3888 server.3=localhost:2889:3889
zoo3.cfg 配置：
# 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/doctor/zookeeper/d_3 # the port at which the clients will connect clientPort=2183 # 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=localhost:2887:3887 server.2=localhost:2888:3888 server.3=localhost:2889:3889
注意：大家都知道，关键是clientPort 不能相同。
其次，让我启动失败的配置那就是：dataDir=/home/doctor/zookeeper/d_x （d_1,d_2,d_3)
里面的配置。
大家应该知道在此文件下需要建立myid文件，里面的内容就是对应server.1=localhost:2887:3887 里面的server.1中的1.例如：
[doctor d_1]$ pwd /home/doctor/zookeeper/d_1 [doctor d_1]$ ls myid version-2 zookeeper_server.pid [doctor d_1]$
[doctor d_1]$ cat myid 1
内容是1,
问题根源：我写入的内容为1,不后面加了空格，就报错，启动不了。
所以，。。。。应该程序读取配置文件时候，就应该trim一下吧。。