以bcm zk集群扩容，从3节点扩容到5节点为例，介绍zk扩容具体操作。
原集群配置如下：
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# The number of milliseconds of each tick tickTime=1000 # 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=2 # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. dataDir=/opt/apache-zookeeper-3.6.3-bin-bcm/zkData # 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=333 # # 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=3 ## Metrics Providers # # https://prometheus.io Metrics Exporter #metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider #metricsProvider.httpPort=7000 #metricsProvider.exportJvmInfo=true server.80=ceph1:2889:3889;2182 server.90=ceph2:2889:3889;2182 server.100=ceph3:2889:3889;2182 4lw.commands.whitelist=* |