Shulou(Shulou.com)06/03 Report--

Continuing from the above, we start the remaining steps, start Cloudera Manager Service, and use this tool to automatically install jdk, and cloudera-agent on the remaining three nodes, server2,server3,server4

Before starting the cloudera-scm-server service, we can manually put the CDH package next week into the server1 host / opt/cloudera/parcel-repo directory to speed up the following steps.

Https://archive.cloudera.com/cdh7/6.0.1/parcels/

Look at the manifest.json file, find the hash value corresponding to your system, and make sure that the value in this CDH-6.0.1-1.cdh7.0.1.p0.590678-el7.parcel.sha file is consistent with that in manifest.json.

1. Start the cloudera-scm-server service

# systemctl start cloudera-scm-server

The waiting time is long. You can determine whether the startup is successful by querying the log.

2, login, http://192.168.1.201:7180/

User name: admin

Password: admin

The following individual pictures are transferred from the Internet. When editing this article, I stay in the installation and download agent interface, which is relatively slow.

3. The hash values mentioned above are the same, and the corresponding version will appear below.

4. The CDH version shown in the above figure is inconsistent, so it is in the process of downloading. After modifying the hash value, restart clouder-scm-server and start all over again. The correct version appears, which instantly prompts the download to be completed, and the installation process of 3 nodes appears.

5. Check the possible problems of the host and the solutions

Cloudera recommends setting / proc/sys/vm/swappiness to 10. Currently set to 60.

# echo 'vm.swappiness=10' > > / etc/sysctl.conf# sysctl-p

Large memory pages disabled

Echo never > / sys/kernel/mm/transparent_hugepage/defrag

Echo never > / sys/kernel/mm/transparent_hugepage/enabled

Or write

Vi / etc/rc.local

Upgrade software depends on version # yum install python-pip

# pip install-upgrade psycopg2

The host is in poor health.

Delete the cm_guid file under the agent directory and restart the agent service recovery of the failed node.

# cd / var/lib/cloudera-scm-agent/

# rm-rf cm_guid

# service cloudera-scm-agent restart

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