namenode should be defined on this machine , all we want is to minimize all in one machine ( amster + worker + kafka ) ... View more

@Jay , first thank you so much you are really one of the best here your knowledge is impressive , I just thinking about case , for example what we can do in case we activate the stop API , and from some reason one or more services not stooped , do we can give the API retry option that will try to stop again in case some services not stopped ? ... View more

@Jay , ok can you refer my comments on - https://community.hortonworks.com/questions/185974/how-to-change-ips-on-all-machine-sin-ambari-cluste.html ... View more

@Jay on which case service auto start will start the services? ... View more

@Jay just to summary the steps my steps are 1. stop all services in the cluster ( by API in the script) 2. stop ambari agent on all hosts 3. change the IP's on all machines - masters, workers , kafka's , ( by the script ) 4. start agent on all hosts 5. start services in the cluster ( by API in the script ) do you agree with this steps? second and very important question - dose the API that stop/start the services in the cluster do it with the right order ? because non order service shutdown service could be problematic ( we are working on production systems ) @Jay I will happy to know your opinion about my automations procesdure .... ... View more

@Jay so if we need to stop all components on each host , then its better to stop all services on the cluster because we need to change the IP's on all hosts - do you agree ? second do you have API that stop all services in the cluster automatically ? ( I mean all services will stoped accorording to the service priority ) @Jay for you information we want to develop automation scripts that will first stop all services and ambari-agent and then will change the IP's and then will start all services in the cluster ... View more

@Jay , something isn't clearly , lets say we want to change the IP on master01 node ( JournalNode ) the article say to "Shutdown all services" dose this mean to stop all components on master01 as App Timeline server , Hive , namenode , resource manager , Webcat ... etc ? regarding to stop the agent its clearly but not clearly if we need to stop all componets on the machine ? SupportKB To change the IP address of a client node in a cluster the following procedure can be followed: Shutdown all services on the node including the Ambari Agent Update the DNS entry for the node with the new IP address Restart networking on the node so that it gets its new IP address. Ensure the hostname is reported correctly using On the node: hostname # should return the short name of the host hostname -s # should return the short name of the host hostname -f # should return the FQDN On the Ambari Server: nslookup nodename.fqdn # should return the new IP address of the node Start up the Ambari Agent on the node Check in Ambari that the node is registered and showing as up Start all the services on the node ... View more