ORACLE LINUX DOCS - My Oracle Support Knowledge Management Articles & Documentation Links

This page provides docs/link references to main Oracle ZFS Storage Appliance product My Oracle Support Knowledge Management Articles & Documentation Links

• Oracle Linux: Remove UEK Kernel completely from Oracle Linux 8 server (Doc ID 3041286.1)
  
  
• Oracle Linux: How to Update Existing Oracle Linux 8 System with Unbreakable Enterprise Kernel(UEK) Release 7 (Doc ID 2927123.1)

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KUBERNETES: KUBECTL Command To List Pods And Their Associated Container Listening Ports

Below command can be used.

kubectl get pods -A -o custom-columns="POD:.metadata.name,PORTS:.spec.containers[*].ports[*].containerPort"

Below is sample output of above command.

POD                                           PORTS

nginx-6f4cfc8479-22zlh                        80

nginx-6f4cfc8479-2trg9                        80

nginx-6f4cfc8479-7sfpj                        80

nginx-6f4cfc8479-mkfng                        80

nginx-6f4cfc8479-nffq6                        80

nginx-6f4cfc8479-vcmx8                        80

coredns-5859f68d4-7p95k                       53,53,9153

coredns-5859f68d4-f7hnb                       53,53,9153

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KUBERNETES: Flannel Pod Network Subnet Environment Configuration File Location And Its Content

/run/flannel/subnet.env is Flannel Pod Network Subnet Environment Configuration.

Below is content of file /run/flannel/subnet.env which shows flannel network. subnet, MTU and IP Masking settings.

FLANNEL_NETWORK=10.XX.0.0/16

FLANNEL_SUBNET=10.XX.0.1/24

FLANNEL_MTU=8950

FLANNEL_IPMASQ=true

 

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KUBERNETES: KUBECTL Command To Check Health Status and Liveliness Probe (livez check) Of Kubernetes Components

Below kubectl command can be used on the Kubernetes Control plane node.

kubectl get --raw='/readyz?verbose'

Alternatively below curl command can also be used instead.

curl -k https://localhost:6443/livez?verbose

Below is sample output of above command.

[+]ping ok

[+]log ok

[+]etcd ok

[+]poststarthook/start-kube-apiserver-admission-initializer ok

[+]poststarthook/generic-apiserver-start-informers ok

[+]poststarthook/priority-and-fairness-config-consumer ok

[+]poststarthook/priority-and-fairness-filter ok

[+]poststarthook/storage-object-count-tracker-hook ok

[+]poststarthook/start-apiextensions-informers ok

[+]poststarthook/start-apiextensions-controllers ok

[+]poststarthook/crd-informer-synced ok

[+]poststarthook/start-service-ip-repair-controllers ok

[+]poststarthook/rbac/bootstrap-roles ok

[+]poststarthook/scheduling/bootstrap-system-priority-classes ok

[+]poststarthook/priority-and-fairness-config-producer ok

[+]poststarthook/start-system-namespaces-controller ok

[+]poststarthook/bootstrap-controller ok

[+]poststarthook/start-cluster-authentication-info-controller ok

[+]poststarthook/start-kube-apiserver-identity-lease-controller ok

[+]poststarthook/start-kube-apiserver-identity-lease-garbage-collector ok

[+]poststarthook/start-legacy-token-tracking-controller ok

[+]poststarthook/aggregator-reload-proxy-client-cert ok

[+]poststarthook/start-kube-aggregator-informers ok

[+]poststarthook/apiservice-registration-controller ok

[+]poststarthook/apiservice-status-available-controller ok

[+]poststarthook/kube-apiserver-autoregistration ok

[+]autoregister-completion ok

[+]poststarthook/apiservice-openapi-controller ok

[+]poststarthook/apiservice-openapiv3-controller ok

[+]poststarthook/apiservice-discovery-controller ok

livez check passed

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