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https://github.com/pditommaso/kube-primer
Basic Kubernetes primer
https://github.com/pditommaso/kube-primer
Last synced: 21 days ago
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Basic Kubernetes primer
- Host: GitHub
- URL: https://github.com/pditommaso/kube-primer
- Owner: pditommaso
- Created: 2017-09-25T16:18:33.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2019-02-17T21:46:01.000Z (almost 6 years ago)
- Last Synced: 2024-10-15T09:56:13.554Z (2 months ago)
- Size: 3.91 KB
- Stars: 0
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: history.txt
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README
# Kubernetes basic commands
## Create `Hello world` pod
Create a basic pod
```
apiVersion: v1
kind: Pod
metadata:
name: hello
labels:
app: nextflow
spec:
restartPolicy: Never
containers:
- name: busybox
image: debian
command: ["echo", "Hello world!"]
```
Save to a file named `hello.yml`. Then execute with the command:
```
kubectl create -f hello.yml -o wide
```
## Basic management
Check the status with:
```
kubectl describe pods/hello
```
Get output with
```
kubectl logs pods/hello
```
List pods
```
kubectl get pods
```
List all pods
```
kubectl get pods --show-all
```
List pods in all namespaces
```
kubectl get pods --all-namespaces
```
## Create a persistent volume
```
apiVersion: v1
kind: PersistentVolume
metadata:
name: gluster-pv
spec:
capacity:
storage: 1Gi
accessModes:
- ReadWriteMany
glusterfs:
endpoints: glusterfs-heketi
path: /data
readOnly: false
persistentVolumeReclaimPolicy: Retain
```
Save to a file named `vol.yml`, then run:
```
kubectl create -f vol.yml
```
List the persistent volumes with:
```
kubectl get pv
```
Create a persistent volume claim
```
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: gluster-claim
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 1Gi
```
Save to a file named `vol-claim.yml`, then run:
```
kubectl create -f vol-claim.yml
```
List the persistent volume claims with:
```
kubectl get pvc
```
Create a pod using the persistent volume:
```
apiVersion: v1
kind: Pod
metadata:
name: touch-1
labels:
app: nextflow
spec:
restartPolicy: Never
containers:
- name: busybox
image: debian
command: ["bash", "-c", "echo Hello world! > /data/hello.txt"]
volumeMounts:
- name: site-data
mountPath: /data
volumes:
- name: site-data
persistentVolumeClaim:
claimName: gluster-claim
```
Save to a file named `pod-touch.yml`, then execute it with the command:
```
kubectl create -f pod-touch.yml -o name
```
Get the output with the command:
```
kubectl logs pods/touch-1
```
## Useful links
* [Gluster example](https://docs.openshift.org/latest/install_config/storage_examples/gluster_example.html)
* [KinD](https://github.com/kubernetes-sigs/kind) - Kubernetes in Docker