Hello neighbors ^.^
Today, I'm going to post about Pod, one of the Kubernetes resources.
There are three ways to drive a pod.
1. Here's how to execute the command (imperative commands).
This time, let's look at the commands that manage the pod.
First, let's look at three ways to generate the Pod.
The first one is the imperative commands, which are the direct operations of the pod.
Use the run command to run as follows.
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$ kubectl run my-nginx1 --image=nginx:1.19.3
pod/my-nginx1 created
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$ kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
my-nginx1 1/1 Running 0 83s 172.17.0.3 ip-172-31-31-84 <none> <none>
2. The number two method is to create a yaml configuration of a command object
1) Define and save the test-pod.yaml file as follows.
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$ vi test-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
tier: frontend
name: my-nginx2
spec:
containers:
- image: nginx:1.19.3
name: my-nginx2
ports:
- containerPort: 802) Run the file you created using the -f option with the create command.
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$ kubectl create -f nginx2-pod.yaml
pod/my-nginx2 created
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$ kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
my-nginx1 1/1 Running 0 6m20s 172.17.0.3 ip-172-31-31-84 <none> <none>
my-nginx2 1/1 Running 0 9s 172.17.0.6 ip-172-31-31-84 <none> <none>
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$
3. The third is to create using the apply and -f options without specifying whether to create or update.
1) Create a yaml file as shown below.
apiVersion: v1
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$ vi test-pod.yaml
kind: Pod
metadata:
labels:
tier: frontend
name: my-nginx3
spec:
containers:
- image: nginx:1.19.3
name: my-nginx2
ports:
- containerPort: 80
2) Now create and query using the apply -f option
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$ kubectl apply -f test-pod.yaml
pod/my-nginx3 created
ubuntu@ip-172-31-31-84:~/dockertext2/chap07$ kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
my-nginx1 1/1 Running 0 10m 172.17.0.3 ip-172-31-31-84 <none> <none>
my-nginx2 1/1 Running 0 4m9s 172.17.0.6 ip-172-31-31-84 <none> <none>
my-nginx3 1/1 Running 0 7s 172.17.0.7 ip-172-31-31-84 <none> <none>