3 ms·

Have you checked out pet sets[1]? The last couple of kube releases have introduced some really nice work to help with these cases [1]http://kubernetes.io/docs/

by maloney 10y ago

Have you checked out pet sets[1]? The last couple of kube releases have introduced some really nice work to help with these cases [1]http://kubernetes.io/docs/user-guide/petset/ http://kubernetes.io/docs/user-guide/petset/

tmzt 10y ago
Does this fit in with hyperkube in some way? Can you see 'pods' that are really complete VM's which may or may not include OCI containers on them. For instance, would a complete Windows Server instance fit the Pet Set concept in the scheduler?
- 101km 10y ago
  Nothing to do with hyperkube. PetSets are simply ordinally ordered container collections instead of randomly ordered. The usual concept in Kubernetes is that a container has a name like 'thing-randomsuffix4242'. It is pushing you towards making your pods stateless and not precious so the failure handing logic is simple. If it is blown away for whatever reason can easily be replaced by the scheduler and 'thing-randomsuffix242b' is never far away. With a predictable ordering you can actually make assumptions you otherwise couldn't. For example, perhaps you want the convention that 'thing-predictable1' is the master and 'thing-rpredictable{2,3}' are the slaves.
- sandGorgon 10y ago
  hyperkube is just a repackaging of all the different packages of k8s as a single binary. so rather than 'kubectl -v', you will run 'hyperkube kubectl -v'
  - tmzt 10y ago
    Closer to minikube then? That was not at all clear to me from reading the site, where it seemed to be discussing a kubelet on an OS on bare metal or hypervisor, but not managing containers.
paultyng 10y ago
For development environments we are running MSSQL (yes that MSSQL, unclustered though as there is no SAN emulation of course), Elasticsearch, Mongo, Kafka, Zookeeper, Redis, Memcached, all in Kubernetes (mostly as Pet Sets) and looking to possibly do this in prod once we are happy with it. The story for state in Kubernetes is improving rapidly. Edit: You can find Helm charts here: https://github.com/kubernetes/charts/tree/master/incubator https://github.com/kubernetes/charts/tree/master/incubator

by maloney 10y ago

tmzt 10y ago

Does this fit in with hyperkube in some way? Can you see 'pods' that are really complete VM's which may or may not include OCI containers on them. For instance, would a complete Windows Server instance fit the Pet Set concept in the scheduler?

101km 10y ago
Nothing to do with hyperkube. PetSets are simply ordinally ordered container collections instead of randomly ordered. The usual concept in Kubernetes is that a container has a name like 'thing-randomsuffix4242'. It is pushing you towards making your pods stateless and not precious so the failure handing logic is simple. If it is blown away for whatever reason can easily be replaced by the scheduler and 'thing-randomsuffix242b' is never far away. With a predictable ordering you can actually make assumptions you otherwise couldn't. For example, perhaps you want the convention that 'thing-predictable1' is the master and 'thing-rpredictable{2,3}' are the slaves.
sandGorgon 10y ago
hyperkube is just a repackaging of all the different packages of k8s as a single binary. so rather than 'kubectl -v', you will run 'hyperkube kubectl -v'
- tmzt 10y ago
  Closer to minikube then? That was not at all clear to me from reading the site, where it seemed to be discussing a kubelet on an OS on bare metal or hypervisor, but not managing containers.

paultyng 10y ago

For development environments we are running MSSQL (yes that MSSQL, unclustered though as there is no SAN emulation of course), Elasticsearch, Mongo, Kafka, Zookeeper, Redis, Memcached, all in Kubernetes (mostly as Pet Sets) and looking to possibly do this in prod once we are happy with it. The story for state in Kubernetes is improving rapidly. Edit: You can find Helm charts here: https://github.com/kubernetes/charts/tree/master/incubator https://github.com/kubernetes/charts/tree/master/incubator