HowToUpgradeOperatingSystem

Grant Gainey edited this page Dec 12, 2016 · 2 revisions

How to upgrade operating system under installed Spacewalk

This page contains instructions for upgrading the operating system underlying your Spacewalk installation (e.g. Spacewalk 2.0 running on CentOS-5, to be upgraded to CentOS-6).

Assumptions

  • your Spacewalk is already upgraded to the version you will be using on the new operating system
  • your Spacewalk is already using the desired database backend -- you will not be switching the database backend as a part of this procedure.

Hostname change

You may decide to deploy the new operating system on a new hostname. Your instructions will then vary in details, depending on whether or not you are renaming your Spacewalk instance.

Procedure

1. Create backups

Create backup of your current Spacewalk. Specifically, you need to create backup of:

  • Database schema
  • Content of your filer (containing packages, kickstart trees, comps), by default configured to point to /var/satellite
  • Content of /root/ssl-build/
  • Content of ~nocpulse/.ssh/
  • Content of /var/lib/cobbler/config/profiles.d/
  • Content of /var/lib/rhn/kickstarts/snippets/
  • Your current /etc/rhn/rhn.conf

2. Install new operating system

Install the desired operating system. You may deploy the new operating system on a machine with a hostname and IP address different from your previous Spacewalk deployment.

3. Install new Spacewalk instance

Install new Spacewalk instance. Keep in mind that:

  • versions of your old and new Spacewalk instances have to match
  • the database backends of your old and new Spacewalk instances have to match (i.e. Oracle -> Oracle, PostgreSQL -> PostgreSQL)
  • you need to follow installation instructions as described in HowToInstall

4. Restore database schema

Restore the database schema from the backup created in step 1. After the restore completes, run the following command as root:

$ spacewalk-schema-upgrade

The above command should finish instantly and its only purpose is to fix the release of deployed schema, to reflect the fact that the underlying operating system has changed.

5. Restore your filer

Restore the filer (/var/satellite) from backup created in step 1. After the restore completes, make sure the user and group ownerships are correct as well as SELinux context:

$ chown -R apache.root /var/satellite
$ restorecon -FRv /var/satellite >& /tmp/restorecon.log

6. Remove jabberd database

Remove jabberd database from the Spacewalk installation on your new operating system:

$ rm -f /var/lib/jabberd/db/*

7. Update SSL configuration

In this step, your instructions will vary depending on whether or not you are renaming your Spacewalk (hostname) as a part of the operating system upgrade.

If you are deploying your Spacewalk on a new hostname (i.e. different from your previous deployment), run the following as root:

$ rhn-ssl-dbstore -vvv --ca-cert=/root/ssl-build/RHN-ORG-TRUSTED-SSL-CERT

If you are keeping your original hostname, do the following steps:

  • Restore content of /root/ssl-build directory from the old Satellite

  • Rebuild the rhn-httpd-ssl-key-pair- package to meet the standards of the latest Satellite. Change to the directory containing restored ssl-build directory (assuming ''/root''):

    $ cd /root

  • Rebuild the package using the following command:

    $ rhn-ssl-tool --gen-server --rpm-only

  • Install the new package (previous command will inform you of exact file name and its location):

    $ rpm -Uvh /root/ssl-build/<MACHINE_NAME>/rhn-org-httpd-ssl-key-pair-.noarch.rpm

  • Deploy the original CA certificate:

    $ rhn-deploy-ca-cert.pl
    --source-dir=/root/ssl-build
    --target-dir=/var/www/html/pub/

8. Re-build search indexes

Run the following command as root to re-build the search indexes:

$ service rhn-search cleanindex

9. Restore monitoring setup

Restore SSH private and public key pair for nocpulse user from backup created in step 1:

$ cp nocpulse-identity nocpulse-identity.pub ~nocpulse/.ssh
$ chown nocpulse.nocpulse ~nocpulse/.ssh/nocpulse-identity*

If you wish to enable just monitoring, run as root:

$ /usr/share/spacewalk/setup/upgrade/rhn-enable-monitoring.pl

If you wish to enable both monitoring and monitoring scout:

$ /usr/share/spacewalk/setup/upgrade/rhn-enable-monitoring.pl --enable-scout

10. Restore Cobbler kickstart profiles and snippets

Restore the content of /var/lib/cobbler/config/profiles.d/ and /var/lib/rhn/kickstarts/snippets/ from backup created in step 1.

11. Re-configure your Spacewalk to use a new hostname

This step is required only if you are deploying your Spacewalk on a new hostname. If the hostname of your upgraded Spacewalk remains unchanged, skip this step.

To reconfigure your Spacewalk to use the new hostname, you will need IP address that the new hostname maps to.

Run the following as root:

$ spacewalk-hostname-rename <NEW-IP-ADDRESS>

12. Verify /etc/rhn/rhn.conf settings

Make sure any custom settings from your previous rhn.conf are restored to the new /etc/rhn/rhn.conf.

13. Restart your Spacewalk

Run as root:

$ spacewalk-service restart
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