Reverting a Failed Cloudera Manager Upgrade

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Minimum Required Role: Cluster Administrator (also provided by Full Administrator) This feature is not available when using Cloudera Manager to manage Data Hub clusters.

This topic describes how to reinstall the same version of Cloudera Manager you were using previously, so that the version of your Cloudera Manager Agents match the server. The steps below assume that the Cloudera Manager Server is already stopped (because it failed to start after the attempted upgrade).

Ensure Cloudera Manager Server and Agent are stopped.

Log in to the Cloudera Manager Server host.
```
ssh my_cloudera_manager_server_host
```
Stop the Cloudera Manager Server.
```
sudo systemctl stop cloudera-scm-server
```
Stop the Cloudera Manager Agent.
RHEL 7, SLES 12, Ubuntu 18.04 and higher
```
sudo systemctl stop cloudera-scm-agent
```
RHEL 5 or 6, SLES 11, Debian 6 or 7, Ubuntu 12.04 or 14.04
```
sudo service cloudera-scm-agent stop
```

Restore the Cloudera Manager Database (if necessary)

If your Cloudera Manager upgrade fails, you need to determine whether the upgrade process has successfully completed updating the schema of the Cloudera Manager database. If the schema update has begun, you must restore the Cloudera Manager database using a backup taken before you began the upgrade.

To determine whether the schema has been updated, examine the Cloudera Manager server logs, and look for a message similar to the following: Updated Schema Version to 60000. (The version number may be different for your environment.)
Run the following command to find the log entry (f the log file is in a different location, substitute the correct path):
```
grep 'Updated Schema Version to ' /var/log/cloudera-scm-server/cloudera-scm-server.log
```
If required, restore the database.
The procedure for restoring the database depends on the type of database used by Cloudera Manager.
If you are using the embedded PostgreSQL database, stop the Cloudera Manager Embedded PostgreSQL database:
RHEL 7, SLES 12, Ubuntu 18.04 and higher
```
sudo systemctl stop cloudera-scm-server-db
```
RHEL 5 or 6, SLES 11, Debian 6 or 7, Ubuntu 12.04 or 14.04
```
sudo service cloudera-scm-server-db stop
```
If you are not using the embedded PostgreSQL database and you attempt to stop it, you might see a message indicating that the service cannot be found. If you see a message that the shutdown failed, then the embedded database is still running, probably because services are connected to the Hive metastore. If the database shutdown fails due to connected services, issue the following command:
RHEL-compatible 7 and higher, Ubuntu 16.04
```
sudo service cloudera-scm-server-db next_stop_fast
sudo service cloudera-scm-server-db stop
```
All other Linux distributions
```
sudo service cloudera-scm-server-db fast_stop
```

Establish Access to the Software

Cloudera Manager needs access to a package repository that contains the updated software packages. You can choose to access the Cloudera public repositories directly, or you can download those repositories and set up a local repository to access them from within your network. If your cluster hosts do not have connectivity to the Internet, you must set up a local repository.

If you have enabled high availability for Cloudera Manager, perform the following steps on the hosts for both the active and passive instances of the Cloudera Manager server.

Remove any older files in the existing repository directory:

RHEL / CentOS

sudo rm /etc/yum.repos.d/cloudera*manager.repo*

SLES

sudo rm /etc/zypp/repos.d/cloudera*manager.repo*

Ubuntu

sudo rm /etc/apt/sources.list.d/cloudera*.list*

Fill in the form at the top of this page.
Create a repository file so that the package manager can locate and download the binaries.
note
If you are upgrading to a Cloudera Manager patch, substitute the download URL for the patch when creating the repository file (cloudera-manager.repo or cloudera_manager.list).
Do one of the following, depending on whether or not you are using a local package repository:
- Use a local package repository. (Required when cluster hosts do not have access to the internet.) See Configuring a Local Package epository.
- Use the Cloudera public repository
  RHEL / CentOS
  1. Create a file named /etc/yum.repos.d/cloudera-manager.repo with the following content:
    [cloudera-manager] name=Cloudera Manager baseurl=https://archive.cloudera.com/p/cm7/<Cloudera Manager version>/redhat<OS major version>/yum/ gpgkey =https://archive.cloudera.com/p/cm7/<Cloudera Manager version>/redhat<OS major version>/yum/RPM-GPG-KEY-cloudera username=changeme password=changeme gpgcheck=1 enabled=1 autorefresh=0 type=rpm-md
    Replace _changeme with your username and password in the /etc/yum.repos.d/cloudera-manager.repo file.
  SLES
  1. Create a file named /etc/zypp/repos.d/cloudera-manager.repo with the following content:
    [cloudera-manager] name=Cloudera Manager baseurl=https://archive.cloudera.com/p/cm7/<Cloudera Manager version>/sles<OS major version>/yum/ gpgkey =https://archive.cloudera.com/p/cm7/<Cloudera Manager version>/sles<OS major version>/yum/RPM-GPG-KEY-cloudera username=changeme password=changeme gpgcheck=1 enabled=1 autorefresh=0 type=rpm-md
  2. Replace changeme with your username and password in the /etc/zypp/repos.d/cloudera-manager.repo file.
  Ubuntu
  Debian is not a supported operating system for Cloudera Manager 6.x.
  1. Create a file named /etc/apt/sources.list.d/cloudera_manager.list with the following content:
    # Cloudera Manager <Cloudera Manager version> deb [arch=amd64] http://username:password@archive.cloudera.com/p/cm7/<Cloudera Manager version>/ubuntu1804/apt -cm<Cloudera Manager version> contrib
  2. Run the following command:
    sudo apt-get update
  3. Replace changeme with your username and password in the /etc/apt/sources.list.d/cloudera_manager.list file.
tip
If you have a mixed operating system environment, adjust the Operating System filter at the top of the page for each operating system. The guide will generate the repo file for you automatically here.
A Cloudera Manager upgrade can introduce new package dependencies. Your organization may have restrictions or require prior approval for installation of new packages. You can determine which packages may be installed or upgraded:
RHEL / CentOS
```
yum deplist cloudera-manager-agent
```
SLES
```
zypper info --requires cloudera-manager-agent
```
Ubuntu
```
apt-cache depends cloudera-manager-agent
```

Downgrade the Cloudera Manager Packages

Downgrade the packages. Note: Only add cloudera-manager-server-db-2 if you are using the embedded PostgreSQL database.
RHEL / CentOS
```
sudo yum clean all
sudo yum repolist
```
```
sudo yum downgrade "cloudera-manager-*"
```
SLES
```
sudo zypper clean --all
```
```
sudo zypper dup -r baseurl
```
Ubuntu

There is no action that downgrades Cloudera Manager to the version currently in the repository.

Verify that you have the correct packages installed.

Ubuntu

dpkg-query -l 'cloudera-manager-*'


Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                   Version                Description
+++-======================-======================-============================================================
ii  cloudera-manager-agent 5.15.0-0.cm...~sq The Cloudera Manager Agent
ii  cloudera-manager-daemo 5.15.0-0.cm...~sq Provides daemons for monitoring Hadoop and related tools.
ii  cloudera-manager-serve 5.15.0-0.cm...~sq The Cloudera Manager Server

RHEL / CentOS / SLES

rpm -qa 'cloudera-manager-*'


cloudera-manager-server-5.15.0-...
cloudera-manager-agent-5.15.0-...
cloudera-manager-daemons-5.15.0-...
cloudera-manager-server-db-2-5.15.0-...

Restore the Cloudera Manager Directory

Run the following commands to extract the backups:

cd $CM_BACKUP_DIR
tar -xf cloudera-scm-agent.tar
tar -xf cloudera-scm-server.tar

Restore the Cloudera Manager server directory from a backup taken during the upgrade process:

sudo -E cp -rp $CM_BACKUP_DIR/etc/cloudera-scm-server/* /etc/cloudera-scm-server

sudo -E cp -rp $CM_BACKUP_DIR/etc/default/cloudera-scm-server /etc/default/cloudera-scm-server

If the Cloudera Manager server host has an agent installed, restore the Cloudera Manager agent directory from a backup taken during the upgrade process:

sudo -E cp -rp $CM_BACKUP_DIR/etc/cloudera-scm-agent/* /etc/cloudera-scm-agent

sudo -E cp -rp $CM_BACKUP_DIR/etc/default/cloudera-scm-agent /etc/default/cloudera-scm-agent

sudo -E cp -rp $CM_BACKUP_DIR/var/run/cloudera-scm-agent/* /var/run/cloudera-scm-agent

sudo -E cp -rp $CM_BACKUP_DIR/var/lib/cloudera-scm-agent/* /var/lib/cloudera-scm-agent

Start Cloudera Manager Again

If you are using the embedded PostgreSQL database, start the database:
```
sudo systemctl start cloudera-scm-server-db
```
Start the Cloudera Manager Agent.
RHEL 7, SLES 12, Ubuntu 18.04 and higher
```
sudo systemctl start cloudera-scm-agent
```
If the agent starts without errors, no response displays.
RHEL 5 or 6, SLES 11, Debian 6 or 7, Ubuntu 12.04 or 14.04
```
sudo service cloudera-scm-agent start
```
You should see the following:
```
Starting cloudera-scm-agent: [ OK ]
```
important
A restart of Cloudera Manager Agents is required on all hosts in the cluster.
Start the Cloudera Manager Server.
```
sudo systemctl start cloudera-scm-server
```
Start the Cloudera Management Service.
1. Log in to the Cloudera Manager Admin Console.
2. Select Clusters > Cloudera Management Service.
3. Select Actions > Start.

vim /var/log/cloudera-scm-server/cloudera-scm-server.log