Containers and Kubernetes

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  • enrique ortiz
    Kuberntes flannel
    Topic posted June 3, 2019 by enrique ortizRed Ribbon: 250+ Points, tagged Kubernetes 
    Title:
    Kuberntes flannel
    Content:

    hi all

    i created an kuberntes cluster using oracle cloud

    The kuberntes cluster is version 1.11.5 when we stop and start the cluster nodes an deploy our application gaves us an error :

    Warning  FailedCreatePodSandBox  33m  kubelet, 130.*.*.*  (combined from similar events): Failed create pod sandbox: rpc error: code = Unknown desc = failed to set up sandbox container "52e46a26c7a0fcad6b3baaf38119da28b618add1bcef42d6139075f845458026" network for pod "<pod name>": NetworkPlugin cni failed to set up pod "< pod name > " network: open /run/flannel/subnet.env: no such file or directory

    and all network connection to the database does not work .  I read that in order to fix i need to create a funnel network , how can i fix these errors  in the cloud kubernretes instances ,

    thanks

    Version:
    V1.11.5
  • Olivier Maurice
    Persistent volumes between worker nodesAnswered15.0
    Topic last edited March 11, 2019 by Arijit ChakrabortyBronze Trophy: 5,000+ Points, tagged Kubernetes, Tip 
    Title:
    Persistent volumes between worker nodes
    Summary:
    Looking into how to share PVCs between worker nodes in different ADs
    Content:

    Hi,

    Use case: a POD that only has 1 replica, but with a PVC attached. In this particular case the nodepool has 2 worker nodes, 1 in each AD.

    In the yaml for the PVC you have to state the AD you want the storage to be created in.

    Now I am wondering: if somehow the POD gets moved from the worker node on AD1 to the worker node on AD2, is all the data contained on the PVC following to the other AD?

    On GKE (Google) you can provision something like a 'regional' persistence volume, over different zones. Anything like this available on OKE?
    And what with the availability of the data over the ADs?

    Is it an option to look at the File Storage Service to share the storage between the worker nodes? But how explain OKE to pipe the claim to the File Storage service?

     

    Thanks for your input,

    Olivier

    Version:
    11.1
  • Shivin Vijai
    Can I run Fn on OKE14.3
    Topic last edited December 31, 2018 by Arijit ChakrabortyBronze Trophy: 5,000+ Points, tagged Containers, Docker, Kubernetes, Tip 
    Title:
    Can I run Fn on OKE
    Content:

    Can I run Fn on OKE?

  • Shivin Vijai
    Oracle Container Registry support signed images?14.5
    Topic posted August 2, 2018 by Shivin VijaiSilver Medal: 2,000+ Points, tagged Containers, Docker, Kubernetes, Registry 
    Title:
    Oracle Container Registry support signed images?
    Summary:
    I need to deploy (push and pull) signed images on Kubernetes
    Content:

    As far I know Oracle Container Registry currently do not support signed images. Is it true? Is there any good workarounds for that. What is the gap from a normal kubernetes deployment using a unsigned image?

    I need to have content trust in docker images. Content trust gives me the ability to verify both the integrity and the publisher of all the data received from a registry over any channel.

    I am looking this for a production set.

    Regards

    -Shivin

  • Sayan Malakshinov
    Containers based on Windows15.0
    Topic posted July 31, 2018 by Sayan Malakshinov, tagged Containers, Docker, Kubernetes 
    Title:
    Containers based on Windows
    Content:

    One of our main applications requires IIS with .Net Framework, which is platform-dependent and requires docker host on Windows, but Oracle Cloud Container Service and Oracle Application Container Service currently support Linux hosts only.

    If we try to deploy official docker dotnet-framework image by Microsoft we get error:

    ERROR Failed to pull image microsoft/dotnet-framework-samples:aspnetapp due to error no supported platform found in manifest list
    Error: no supported platform found in manifest list
    

     How can we ask Oracle to add containers based on Windows?