Skip to content

Latest commit

 

History

History
183 lines (141 loc) · 4.46 KB

13-kubernetes-config-03-kubectl.md

File metadata and controls

183 lines (141 loc) · 4.46 KB

Задание 1

1. Настройка проброса портов

kubectl create ingress front-13.3 --class=nginx --rule=cp1.cluster.local/*=frontend-svc:8000
kubectl create ingress back-13.3 --class=nginx --rule=cp1.cluster.local/*=backend-svc:9000
kubectl port-forward service/frontend-svc 80:8000 --address=0.0.0.0 &
kubectl port-forward service/backend-svc 81:9000 --address=0.0.0.0 &
kubectl port-forward service/postgresql-svc 5432:5432 --address=0.0.0.0 &

1.1. Frontend

  • Port-forward

curl http://192.168.1.106

Handling connection for 80
<!DOCTYPE html>
<html lang="ru">
<head>
    <title>Список</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="/build/main.css" rel="stylesheet">
</head>
<body>
    <main class="b-page">
        <h1 class="b-page__title">Список</h1>
        <div class="b-page__content b-items js-list"></div>
    </main>
    <script src="/build/main.js"></script>
</body>
</html>
  • Exec

kubectl exec -it frontend-645767c6-sc8fd -c frontend -- curl http://backend-svc:9000

{"detail":"Not Found"}

1.2. Backend

  • Port-forward

curl http://192.168.1.106:81

Handling connection for 81
{"detail":"Not Found"}
  • Exec
kubectl exec -it backend-db8847ff5-ckjpf -c backend -- sh -c 'apt-get -y install postgresql-client && psql news -h postgresql-svc -U postgres -c "select id from public.news limit 10"'

Get:1 http://deb.debian.org/debian buster/main amd64 distro-info-data all 0.41+deb10u4 [6880 B]
...
(Reading database ... 24671 files and directories currently installed.)
...
Setting up postgresql-client (11+200+deb10u4) ...
...
Password for user postgres:
 id
----
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
(10 rows)

1.3. PostgreSQL

  • Port-forward

psql news -U postgres -h 192.168.1.106 -c "select id from public.news limit 10"

Password for user postgres:
 id
----
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
(10 rows)
  • Exec

kubectl exec -it postgresql-sts-0 -c postgresql -- sh -c 'psql news -U postgres -c "select id from public.news limit 10"'

Password for user postgres:
 id
----
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
(10 rows)

Задание 2

Масштабируем до 3 реплик

kubectl scale --replicas=3 deploy/backend
deployment.apps/backend scaled

kubectl scale --replicas=3 deploy/frontend
deployment.apps/frontend scaled

kubectl get pods -o wide

NAME                                  READY   STATUS    RESTARTS   AGE    IP             NODE    NOMINATED NODE   READINESS GATES
backend-db8847ff5-2d47f               1/1     Running   0          3m9s   10.244.0.158   node2   <none>           <none>
backend-db8847ff5-ckjpf               1/1     Running   0          41m    10.244.0.155   node2   <none>           <none>
backend-db8847ff5-r4gqx               1/1     Running   0          110s   10.244.0.161   node2   <none>           <none>
frontend-645767c6-9m79q               1/1     Running   0          3m3s   10.244.0.160   node1   <none>           <none>
frontend-645767c6-bvmhg               1/1     Running   0          3m3s   10.244.0.159   node2   <none>           <none>
frontend-645767c6-sc8fd               1/1     Running   0          41m    10.244.0.156   node2   <none>           <none>
nfs-server-nfs-server-provisioner-0   1/1     Running   0          85m    10.244.0.152   node1   <none>           <none>
postgresql-sts-0                      1/1     Running   0          78s    10.244.0.162   node2   <none>           <none>

Масштабируем обратно до 1 реплики

kubectl scale --replicas=1 deploy/backend
deployment.apps/backend scaled

root@cp1:/home/user/13.1/Task_2(production)# kubectl scale --replicas=1 deploy/frontend
deployment.apps/frontend scaled

kubectl get pods -o wide

NAME                                  READY   STATUS    RESTARTS   AGE     IP             NODE    NOMINATED NODE   READINESS GATES
backend-db8847ff5-ckjpf               1/1     Running   0          43m     10.244.0.155   node2   <none>           <none>
frontend-645767c6-9m79q               1/1     Running   0          5m30s   10.244.0.160   node1   <none>           <none>
nfs-server-nfs-server-provisioner-0   1/1     Running   0          88m     10.244.0.152   node1   <none>           <none>
postgresql-sts-0                      1/1     Running   0          3m45s   10.244.0.162   node2   <none>           <none>