OSG CA Certificates Updater

About this Document

This document explains the installation and use of osg-ca-certs-updater, a package in the OSG Software 3.x distribution that provides automatic updates of CA certificates.

Requirements

  • OS must be Red Hat Enterprise Linux 5 or 6 or variants.
  • The OSG repositories must be installed and enabled. See the Yum Repositories page for instructions.
  • One grid-certificates package from the OSG repositories must be installed as described here. Currently, these are: igtf-ca-certs, osg-ca-certs.

Install instructions

Run the following command to install the latest version of the updater.

[root@client ~]$ yum install osg-ca-certs-updater

Services

Starting and Enabling Services

Run the following to enable the updater. This will persist until the machine is rebooted.

[root@client ~]$ service osg-ca-certs-updater-cron start
Run the following to enable the updater when the machine is rebooted.
[root@client ~]$ chkconfig osg-ca-certs-updater-cron on
Run both commands if you wish for the service to activate immediately and remain active throughout reboots.

Stopping and Disabling Services

Enter the following to disable the updater. This will persist until the machine is rebooted.

[root@client ~]$ service osg-ca-certs-updater-cron stop
Enter the following to disable the updater when the machine is rebooted.
[root@client ~]$ chkconfig osg-ca-certs-updater-cron off
Run both commands if you wish for the service to deactivate immediately and not get reactivated during reboots.

Configuration

While there is no configuration file, the behavior of the updater can be adjusted by command-line arguments that are specified in the cron entry of the service. This entry is located in the file /etc/cron.d/osg-ca-certs-updater. Please see the Unix manual page for crontab in section 5 for an explanation of the format. The manual page can be accessed by the command man 5 crontab. The valid command-line arguments can be listed by running osg-ca-certs-updater --help. Reasonable defaults have been provided, namely:
  • Attempt an update no more often than every 23 hours. Due to the random wait (see below), having a 24-hour minimum time between updates would cause the update time to slowly slide back every day.
  • Run the script every 6 hours. We run the script more often than we update so that downtime at the wrong moment does not cause the update to be delayed for a full day.
  • Delay for a random amount of time up to 30 minutes before updating, to reduce load spikes on OSG repositories.
  • Do not warn the administrator about update failures that have happened less than 72 hours since the last successful update.
  • Log errors only.

Troubleshooting

Useful configuration and log files

Configuration file

Package File Description Location Comment
osg-ca-certs-updater Cron entry for periodically launching the updater /etc/cron.d/osg-ca-certs-updater Command-line arguments to the updater can be specified here
osg-release Repo definition files for production OSG repositories /etc/yum.repos.d/osg.repo or /etc/yum.repos.d/osg-el6.repo Make sure these repositories are enabled and reachable from the host you are trying to update

Log files

Logging is performed to the console by default. Please see the manual for your cron daemon to find out how it handles console output.

A logfile can be specified via the -l / --logfile command-line option.

If logging to syslog via the -s / --log-to-syslog option, the updater will write to the user section of the syslog. The file /etc/syslog.conf determines where syslog messages are saved.

How to get Help?

To get assistance please use Help Procedure.

References

Some guides on X.509 certificates: Some examples about verifying the certificates: Related software:

Comments

Topic revision: r13 - 06 Dec 2016 - 18:12:44 - KyleGross
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