General Information
Service URL - http://opsdb.dante.net/
- Usual configuration - Points to primary instance.
- Primary Instance - http://prod-opsdb01.geant.net/,
- Secondary Instance - http://prod-opsdb02.geant.net/
OpsDB runs on two VMs on each environment (Prod, UAT and Test)
- xxxx-opsdb01.geant.net and xxxxx-opsdb02.geant.net where xxxxx = prod, uat, or test
OpsDB is written using PHP 5.3.3, HTML, JavaScript, and runs in a Linux system environment (Centos).
Centos - CentOS-6 updates until November 30, 2020
PHP 5.3.3 FINISHED being officially supported, but being supported via centos back porting of PHP security releases – end of life same as centos 6 system.
HTML / Javascript are currently supported and have no future planned support end dates, in fact older versions are more supported than the latest ones!.
First Steps
If for any reason the system becomes unavailable:
- Check if the primary instance available by going to: http://prod-opsdb01.geant.net/
- Something wrong with DNS entry (troubleshooting steps)?Suggests DNS issue with opsdb.dante.net - OC should be able to deal with it.
- If Primary instance of OPSDB is not available then check if the secondary instance of the OPSDB available by going at http://prod-opsdb02.geant.net/
- If yes, switch the DNS entry for OPSDB from the ‘Primary(01)’ instance to the ‘Secondary(02)’ instance. This will allow the general user to continue working on OpsDB whist we continue with our investigations as to why it initially went down.
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If out of hours, log into VCentre (please use win/adm-xxxx account) and check if the VMs are running. If the server can't be pinged :
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This should start or restart MySQL on the VM – please perform this on both VMs separately.
Security Updates with underlying software and operating systems
OpsDB is, in terms of software, an ‘old lady’ now, awaiting retirement.
It is currently written using PHP 5.3.3, HTML, JavaScript, and runs in a Linux system environment (Centos).
Centos - CentOS-6 updates until November 30, 2020
PHP 5.3.3 FINISHED being officially supported, but being supported via centos back porting of PHP security releases – end of life same as centos 6 system.
HTML / Javascript are currently supported and have no future planned support end dates, in fact older versions are more supported than the latest ones!.
Check disk usage
Is the VM disk full?
Is the allocated OpsDB disk space full.
Check Disk Usage
Follow the steps here: clean up big files
This should already be being monitored and reported upon if it is becoming full , so this scenario should never occur.
Final Step
Please raise ticket with Software Development Support and include the details of the steps taken out of business hours so that detailed analyses of the failure can be carried out.