The Kubernetes command-line tool, kubectl, allows you to run commands against Kubernetes clusters. You can use kubectl to deploy applications, inspect and manage cluster resources, and view logs
1. Fork and Clone the repo
git clone https://github.com/bitprj/tinyhats.git2. apply the configuration YAML files to your Kubernetes cluster by running
kubectl apply -f kube[~]$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
minikube-workshop Ready control-plane,master 11m v1.20.7
PROTIP: Set an alias for kubectl so you can move even faster.
alias k='kubectl'
k get pods -A
[~]$ kubectl get namespaces
NAME STATUS AGE
default Active 13m
kube-node-lease Active 13m
kube-public Active 13m
kube-system Active 13m
[~]$ kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-74ff55c5b-d2vpb 1/1 Running 0 11m
etcd-minikube-workshop 1/1 Running 0 11m
kube-apiserver-minikube-workshop 1/1 Running 0 11m
kube-controller-manager-minikube-workshop 1/1 Running 0 11m
kube-proxy-kgggq 1/1 Running 0 11m
kube-scheduler-minikube-workshop 1/1 Running 0 11m
storage-provisioner 1/1 Running 1 11m
[~]$ kubectl describe pod coredns-74ff55c5b-d2vpb -n kube-system
Name: coredns-74ff55c5b-d2vpb
Namespace: kube-system
Priority: 2000000000
Priority Class Name: system-cluster-critical
Node: minikube-workshop/192.168.49.2
Start Time: Wed, 27 Oct 2021 15:06:12 -0500
Labels: k8s-app=kube-dns
pod-template-hash=74ff55c5b
Annotations: <none>
Status: Running
IP: 172.17.0.2
IPs:
IP: 172.17.0.2
Controlled By: ReplicaSet/coredns-74ff55c5b
Containers:
coredns:
Container ID: docker://2f8b82db645bfe4135bc8e4b9ac1611181c08895d4682ddc3b5477e51030634d
Image: k8s.gcr.io/coredns:1.7.0
Image ID: docker-pullable://k8s.gcr.io/coredns@sha256:73ca82b4ce829766d4f1f10947c3a338888f876fbed0540dc849c89ff256e90c
Ports: 53/UDP, 53/TCP, 9153/TCP
Host Ports: 0/UDP, 0/TCP, 0/TCP
Args:
-conf
/etc/coredns/Corefile
State: Running
Started: Wed, 27 Oct 2021 15:06:14 -0500
Ready: True
Restart Count: 0
Limits:
memory: 170Mi
Requests:
cpu: 100m
memory: 70Mi
Liveness: http-get http://:8080/health delay=60s timeout=5s period=10s #success=1 #failure=5
Readiness: http-get http://:8181/ready delay=0s timeout=1s period=10s #success=1 #failure=3
Environment: <none>
Mounts:
/etc/coredns from config-volume (ro)
/var/run/secrets/kubernetes.io/serviceaccount from coredns-token-8b4xf (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
config-volume:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: coredns
Optional: false
coredns-token-8b4xf:
Type: Secret (a volume populated by a Secret)
SecretName: coredns-token-8b4xf
Optional: false
QoS Class: Burstable
Node-Selectors: kubernetes.io/os=linux
Tolerations: CriticalAddonsOnly op=Exists
node-role.kubernetes.io/control-plane:NoSchedule
node-role.kubernetes.io/master:NoSchedule
node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 12m default-scheduler Successfully assigned kube-system/coredns-74ff55c5b-d2vpb to minikube-workshop
Normal Pulled 12m kubelet Container image "k8s.gcr.io/coredns:1.7.0" already present on machine
Normal Created 11m kubelet Created container coredns
Normal Started 11m kubelet Started container coredns
[~]$ kubectl get services -A
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 17m
kube-system kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP,9153/TCP 17m
[~]$ kubectl get deployments -n kube-system
NAME READY UP-TO-DATE AVAILABLE AGE
coredns 1/1 1 1 16m
[~]$ kubectl get daemonsets -A
NAMESPACE NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
kube-system kube-proxy 1 1 1 1 1 kubernetes.io/os=linux 18m
[~]$ kubectl get events -n kube-system
LAST SEEN TYPE REASON OBJECT MESSAGE
12m Normal Scheduled pod/coredns-74ff55c5b-d2vpb Successfully assigned kube-system/coredns-74ff55c5b-d2vpb to minikube-workshop
12m Normal Pulled pod/coredns-74ff55c5b-d2vpb Container image "k8s.gcr.io/coredns:1.7.0" already present on machine
12m Normal Created pod/coredns-74ff55c5b-d2vpb Created container coredns
12m Normal Started pod/coredns-74ff55c5b-d2vpb Started container coredns
12m Normal SuccessfulCreate replicaset/coredns-74ff55c5b Created pod: coredns-74ff55c5b-d2vpb
12m Normal ScalingReplicaSet deployment/coredns Scaled up replica set coredns-74ff55c5b to 1
12m Normal LeaderElection endpoints/k8s.io-minikube-hostpath minikube-workshop_0a4bd673-a799-423a-a386-6b9619e73d8b became leader
12m Normal Scheduled pod/kube-proxy-kgggq Successfully assigned kube-system/kube-proxy-kgggq to minikube-workshop
12m Normal Pulled pod/kube-proxy-kgggq Container image "k8s.gcr.io/kube-proxy:v1.20.7" already present on machine
12m Normal Created pod/kube-proxy-kgggq Created container kube-proxy
12m Normal Started pod/kube-proxy-kgggq Started container kube-proxy
12m Normal SuccessfulCreate daemonset/kube-proxy Created pod: kube-proxy-kgggq
12m Warning FailedScheduling pod/storage-provisioner 0/1 nodes are available: 1 node(s) had taint {node.kubernetes.io/not-ready: }, that the pod didn't tolerate.
12m Normal Scheduled pod/storage-provisioner Successfully assigned kube-system/storage-provisioner to minikube-workshop
12m Normal Pulled pod/storage-provisioner Container image "gcr.io/k8s-minikube/storage-provisioner:v5" already present on machine
12m Normal Created pod/storage-provisioner Created container storage-provisioner
12m Normal Started pod/storage-provisioner Started container storage-provisioner
[~]$ k get --raw /api/v1/namespaces
{"kind":"NamespaceList","apiVersion":"v1","metadata":{"resourceVersion":"1387"},"items":[{"metadata":{"name":"default","uid":"016aae31-d9f7-4a95-bb18-50a6e082e592","resourceVersion":"203","creationTimestamp":"2021-10-27T20:05:55Z","managedFields":[{"manager":"kube-apiserver","operation":"Update","apiVersion":"v1","time":"2021-10-27T20:05:55Z","fieldsType":"FieldsV1","fieldsV1":{"f:status":{"f:phase":{}}}}]},"spec":{"finalizers":["kubernetes"]},"status":{"phase":"Active"}},{"metadata":{"name":"kube-node-lease","uid":"f6cf8ff5-67cb-4541-ba79-d2af699bc7fd","resourceVersion":"27","creationTimestamp":"2021-10-27T20:05:53Z","managedFields":[{"manager":"kube-apiserver","operation":"Update","apiVersion":"v1","time":"2021-10-27T20:05:53Z","fieldsType":"FieldsV1","fieldsV1":{"f:status":{"f:phase":{}}}}]},"spec":{"finalizers":["kubernetes"]},"status":{"phase":"Active"}},{"metadata":{"name":"kube-public","uid":"dac858aa-4be4-4ea1-91f8-4248dbbc228b","resourceVersion":"12","creationTimestamp":"2021-10-27T20:05:53Z","managedFields":[{"manager":"kube-apiserver","operation":"Update","apiVersion":"v1","time":"2021-10-27T20:05:53Z","fieldsType":"FieldsV1","fieldsV1":{"f:status":{"f:phase":{}}}}]},"spec":{"finalizers":["kubernetes"]},"status":{"phase":"Active"}},{"metadata":{"name":"kube-system","uid":"98d134e2-16ee-4e85-9d87-8b48fc6743fe","resourceVersion":"4","creationTimestamp":"2021-10-27T20:05:53Z","managedFields":[{"manager":"kube-apiserver","operation":"Update","apiVersion":"v1","time":"2021-10-27T20:05:53Z","fieldsType":"FieldsV1","fieldsV1":{"f:status":{"f:phase":{}}}}]},"spec":{"finalizers":["kubernetes"]},"status":{"phase":"Active"}}]}