Tag: devops
Changing the size of a persistent volume in Kubernetes 1.10 on GKE
In Kubernetes v1.11 you can resize persistent volume claims. Great! Sadly, Google has not rolled this out to us great unwashed yet (its available to early-adopters or for everyone on alpha clusters), we are on v1.10. Side note: Docker registry. One of the most commonly asked questions is: how do I delete or clean up?…
Am I me? Are you you? The existential crisis of containers, not of Camus, and SPIFFE
Grade 9 French. Assigned Albert Camus’ “L’Étranger” to read. We all came back as one and had understood the words but not the meaning. Hippy french teacher then decides we really needed to understand existentialism. A few lessons later, tl;dr: something about a beach? There is a crisis of identity in the highly-orchestrated field of…
My build is slow: understanding resource limits and steal time in the cloudy world of cloud
I earlier wrote about steal time, the concept of “my image wants to use time but its not available due to some unknown noisy neighbour stealing it”. In a nutshell, you have a server with X resources. You then ‘sell’ 10X to your users, making it 10:1 oversubscribed. The Internet industry of late has been…
Ceph in the city: introducing my local Kubernetes to my ‘big’ Ceph cluster
Ceph has long been a favourite technology of mine. Its a storage mechanism that just scales out forever. Gone are the days of raids and complex sizing / setup. Chuck all your disks into whatever number of servers, and let ceph take care of it. Want more read speed? Let it have more read replicas.…
Downward scaling the cloud
One of the things you will find as you go on your journey through the cloud is that the downward-scalability is very poor. Cloud is designed for a high upfront cost (people time and equipment $$$). But after that, it scales very linearly for a long way. This is great if you are a cog…
