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Top Forums UNIX for Advanced & Expert Users Upgrading legacy packages with patch Post 303043776 by Neo on Thursday 6th of February 2020 06:19:05 AM
Old 02-06-2020
Quote:
Originally Posted by anaigini45
All the servers are mission critical.
And in terms of risk management, we have an SLA of maximum 4 hours to bring the server back up in an event of a catastrophe.
Does not sound very "mission critical" to me.

If you define everything that can be down with an SLA for four hours as "mission critical", what would you define a server that if it went down it would cost the company 100K to 1M USD per hour?

Most people would not define a service as "MISSION CRITICAL" if it has a SLA of four hours, to be frank. But then again that depends on the "MISSION".

If you have SLA of four hours, then you can easily make a mistake and recover from it long before the four hour SLA window is reached. That is more like "A STANDARD BUSINESS SLA", for a lack of a better term.

Do you have a risk management team (normally a part of either the IT security or audit teams) responsible for the risk management of all these servers?

If so, get them involved.

The biggest loses any company has is usually a mistake by a well intended trusted employee. Often, these big mistakes are caused by trying to automate an upgrade to hundreds of devices (routers, servers, firewalls, etc).

Best to set up a test bed, work on the changes, and get it working. You cannot just take "YUM" and try to upgrade if the original installs were done manually. This is a formula for a lot of downtime!
 

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reposync(1)															       reposync(1)

NAME
reposync - synchronize yum repositories to a local directory SYNOPSIS
reposync [options] DESCRIPTION
reposync is used to synchronize a remote yum repository to a local directory, using yum to retrieve the packages. OPTIONS
-h, --help Display a help message, and then quit. -c CONFIG, --config=CONFIG Config file to use (defaults to /etc/yum.conf). -a ARCH, --arch=ARCH Act as if running the specified arch (default: current arch, note: does not override $releasever. x86_64 is a superset for i*86.). --source Also download .src.rpm files. -r REPOID, --repoid=REPOID Specify repo ids to query, can be specified multiple times (default is all enabled). -t, --tempcache Use a temp dir for storing/accessing yum-cache. -p DESTDIR, --download_path=DESTDIR Path to download packages to: defaults to current directory. -g, --gpgcheck Remove packages that fail GPG signature checking after downloading. exit status is '1' if at least one package was removed. -u, --urls Just list urls of what would be downloaded, don't download. -l, --plugins Enable yum plugin support. -n, --newest-only Download only newest packages per-repo. -q, --quiet Output as little information as possible. EXAMPLES
Sync all packages from the 'updates' repo to the current directory: reposync --repoid=updates Sync only the newest packages from the 'updates' repo to the current directory: reposync -n --repoid=updates Sync packages from the 'updates' and 'extras' repos to the current directory: reposync --repoid=updates --repoid=extras Sync all packages from the 'updates' repo to the repos directory: reposync -p repos --repoid=updates Sync all packages from the 'updates' repo to the repos directory excluding x86_64 arch. Edit /etc/yum.conf adding option exclude=*.x86_64. Then: reposync -p repos --repoid=updates FILES
reposync uses the yum libraries for retrieving information and packages. If no configuration file is specified, the default yum configura- tion will be used. /etc/yum.conf /etc/yum/repos.d/ SEE ALSO
yum.conf (5) http://yum.baseurl.org/ AUTHORS
See the Authors file included with this program. BUGS
There are of course no bugs, but should you find any, you should first consult the FAQ section on http://yum.baseurl.org/wiki/Faq and if unsuccessful in finding a resolution contact the mailing list: yum-devel@lists.baseurl.org. To file a bug use http://bugzilla.redhat.com for Fedora/RHEL/Centos related bugs and http://yum.baseurl.org/report for all other bugs. 27 April 2007 reposync(1)
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