Introduction This process can be used whenever your databases are out of sync. For example when someone without thinking reboots all nodes in a cluster without shutting down the databases first. Resolution Place all cluster hosts into standby mode and cleanup any failed resources. I sugguest making a back-up of Mariadb on each controller nodes … Continue reading How to Recover an Out of Sync Mariadb Galera OpenStack Database cluster
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XenServer 6: There Was an Error Connecting to the Server. The Service Did Not Reply Properly
GoombaWow, this is a really overly complicated error for such a simple problem to resolve. Allow me to give you some background. I am currently building my first production ready (well non-production really) XenServer cluster and ran into this issue when attempting to add my second host into the cluster. I hit google and found out that this was actually just a dns issue.
Cisco UCS Failover Via 6248 CLI
Need to fail over Cisco UCS Manager from one 6248 to another. Oh did I mention that you are in a hurry because you are going to have to sift through pages and pages of pdfs to get the information. I found this out the hard way. Anyway, out of the kindness of my heart I have documented this process below.
How Not to Assign KVM IP Addresses Via Cisco UCS Manager
After a few hours poking around a newly deployed UCS cluster trying to get some basic profiles created and assigned. I realized that I had actually no idea how the KVM is actually supposed to work inside the UCS cluster. Which is funny as this was a subject that we touched on during my DCUDC class. Apparently we did not touch on it enough.
How to Disable DRS for one VM in a DRS Enabled Cluster
In order to override the default DRS cluster settings for a vm, you need to do the following.