pengenalan

openshift => platform komputasi awan yang dikembangkan oleh Red Hat yang memungkinkan pengembang untuk membangun, menyebarkan, dan mengelola aplikasi secara lebih mudah dan efisien. cluster => Kubernetes

openshift cluster => oc

oc login -u <USERNAME> -p <PASSWORD> <API_ENDPOINT>:<PORT>
oc login -u user -p password https://api.ocp4.example.com:6443

oc whoami --show-console

1

oc login -u developer -p developer https://api.ocp4.example.com:6443

[student@workstation ~]$ oc whoami --show-console
https://console-openshift-console.apps.ocp4.example.com

open in browser

2

computes > nodes
click master01 > terminal

chroot /host
systemctl status kubeleet
systemctl status crio

review

Kubernetes and OpenShift Command-Line Interfaces and APIs

1

installasi cli

curl -LO "https://dl.k8s.io/release/$(curl -L \
  -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"

curl -LO "https://dl.k8s.io/$(curl -L \
-s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl.sha256"

[user@host ~]$ echo "$(cat kubectl.sha256)  kubectl" | sha256sum --check
kubectl: OK

- if error u can

sudo install -o root -g root -m 0755 kubectl \
  /usr/local/bin/kubectl

• kubectl

  kubectl version --client
  

cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
enabled=1
gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
[user@host ~]$ sudo yum install -y kubectl

kubectl --help
kubectl create --help
kubectl explain pod

oc

oc

oc login cluster-url
oc login --token=sha256-BW...rA8 \
  --server=https://api.ocp4.example.com:6443

oc login https://api.ocp4.example.com:6443
Username: developer
Password: developer
Login successful.

oc new-project myapp

oc cluster-info #info
oc api-versions #version

oc get clusteroperator
oc get pod

oc get all

oc describe mysql-openshift-1-glgrp #deskripsi
oc explain pods.spec.containers.resources #menjelaskan submer api

oc create -f pod.yaml

oc status
oc status --sugest #identify issue

oc delete pod quotes-ui

oc get pods -n openshift-apiserver

2

kubernetes and openshift resources

oc api-resources

--namespaced=true	Jika false, kembalikan sumber daya non-namespaced, jika tidak, kembalikan sumber daya namespaced
--api-group apps	Batasi sumber daya dalam grup API yang ditentukan. Gunakan untuk menampilkan sumber daya inti.--api-group=''
--sort-by name	Jika tidak kosong, urutkan daftar sumber daya menggunakan bidang tertentu. Bidang dapat berupa 'nama' atau 'jenis'.

oc api-resources --namespaced=true --api-group apps --sort-by name
NAME                  SHORTNAMES   APIVERSION   NAMESPACED   KIND
controllerrevisions                apps/v1      true         ControllerRevision
daemonsets            ds           apps/v1      true         DaemonSet
deployments           deploy       apps/v1      true         Deployment

oc explain pod
oc explain pod.spec

oc get pod --selector group=developers
oc get pods -o wide #showing many key

[user@host ~]$ oc get pods -o yaml
apiVersion: v1
items:
- apiVersion: v1
  kind: Pod
  metadata:
    annotations:
...object omitted...

[user@host ~]$ oc get pods -o yaml | yq r - 'items[0].status.podIP'
10.8.0.60

oc get pods -o json
{
    "apiVersion": "v1",
    "items": [
        {
            "apiVersion": "v1",
            "kind": "Pod",
            "metadata": {

oc get pods -o json | jq '.items[0].status.podIP'
"10.8.0.60"

oc get pods \
-o custom-columns=PodName:".metadata.name",\
ContainerName:"spec.containers[].name",\
Phase:"status.phase",\
IP:"status.podIP",\
Ports:"spec.containers[].ports[].containerPort"

PodName                  ContainerName   Phase     IP          Ports
myapp-77fb5cd997-xplhz   myapp           Running   10.8.0.60   <none>

oc get pods  \
-o jsonpath='{range .items[]}{"Pod Name: "}{.metadata.name}
{"Container Names:"}{.spec.containers[].name}
{"Phase: "}{.status.phase}
{"IP: "}{.status.podIP}
{"Ports: "}{.spec.containers[].ports[].containerPort}
{"Pod Start Time: "}{.status.startTime}{"\n"}{end}'

PodName                  ContainerName   Phase     IP          Ports
myapp-77fb5cd997-xplhz   myapp           Running   10.8.0.60   <none>