1 停止ambari-server服務
# ambari-server status
Using python /usr/bin/python
Ambari-server status
Ambari Server running
Found Ambari Server PID: 25164 at: /var/run/ambari-server/ambari-server.pid# ambari-server stop
Using python /usr/bin/python
Stopping ambari-server
Waiting for server stop...
Ambari Server stopped
# ambari-server status
Using python /usr/bin/python
Ambari-server status
Ambari Server not running. Stale PID File at: /var/run/ambari-server/ambari-server.pid
2 備份數據（PostgreSQL）
導出原數據庫數據
# pg_dump -U ambari ambari > ambari.sql
Password: bigdata
3 部署新ambari-server
部署步驟以前文章中有，不再詳述
4 初始化新數據庫
切換至postgres用戶
# su - postgres進入psql
# psql
postgres@DEVSAE143071:/var/lib/pgsql> psql
psql (9.2.21)
Type "help" for help.刪除初始化創建的數據庫
postgres=# drop database ambari;創建數據庫
postgres=# create database ambari;退出psql
postgres-# \q
5、導入數據
將導出的ambari.sql文件拷貝到新ambari-server節點上
psql -d ambari -f /tmp/ambari.sql
6 切換所有ambari-agent 指向
停止所有agent
# ambari-agent stop
分別修改所有agent的配置項/etc/ambari-agent/conf/ambari-agent.ini
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific[server]
hostname=新server的hostname
url_port=8440
secured_url_port=8441
connect_retry_delay=10
max_reconnect_retry_delay=30
[agent]
logdir=/var/log/ambari-agent
piddir=/var/run/ambari-agent
prefix=/var/lib/ambari-agent/data
;loglevel=(DEBUG/INFO)
loglevel=INFO
data_cleanup_interval=86400
data_cleanup_max_age=2592000
data_cleanup_max_size_MB = 100
ping_port=8670
cache_dir=/var/lib/ambari-agent/cache
tolerate_download_failures=true
run_as_user=root
parallel_execution=0
alert_grace_period=5
status_command_timeout=5
alert_kinit_timeout=14400000
system_resource_overrides=/etc/resource_overrides
; memory_threshold_soft_mb=400
; memory_threshold_hard_mb=1000
; ignore_mount_points=/mnt/custom1,/mnt/custom2[security]
keysdir=/var/lib/ambari-agent/keys
server_crt=ca.crt
passphrase_env_var_name=AMBARI_PASSPHRASE
ssl_verify_cert=0
credential_lib_dir=/var/lib/ambari-agent/cred/lib
credential_conf_dir=/var/lib/ambari-agent/cred/conf
credential_shell_cmd=org.apache.hadoop.security.alias.CredentialShell[network]
; this option apply only for Agent communication
use_system_proxy_settings=true[services]
pidLookupPath=/var/run/[heartbeat]
state_interval_seconds=60
dirs=/etc/hadoop,/etc/hadoop/conf,/etc/hbase,/etc/hcatalog,/etc/hive,/etc/oozie,
/etc/sqoop,
/var/run/hadoop,/var/run/zookeeper,/var/run/hbase,/var/run/templeton,/var/run/oozie,
/var/log/hadoop,/var/log/zookeeper,/var/log/hbase,/var/run/templeton,/var/log/hive
; 0 - unlimited
log_lines_count=300
idle_interval_min=1
idle_interval_max=10
[logging]
7 重啓服務
啓動ambari-server
# ambari-server start
啓動所有ambari-agent
# ambari-agent start