Установка docker, kebernates кластера

Установка и настройка docker kebernates 1. Установка и запуск сервиса docker

1. yum install docker docker-containerd
2. systemctl start docker
3. systemctl enable docker

2. Проверка и запуск контейнера

1. docker pull debian
2. docker run -it --rm --name pekonkin debian bash

3. Создание Dockerfile

1. touch Dockerfile
2. vi Dockerfile

Вставить фрагмент: FROM debian RUN apt-get update && apt-get install ntp –y Создание image из Dockerfile

1. docker build .

4.Установка kubernates master-node

1. yum install -y kubelet kubeadm kubectl
2. systemctl enable kubelet
3. systemctl start kubelet
4. hostnamectl set-hostname master-node
5. vi /etc/hosts

10.45.4.58 master-node 10.45.4.59 worker-node

1. sed -i '/swap/d' /etc/fstab
2. swapoff -a
3. kubeadm init

Установщик даст токен подключения к master node, у вас будет свой токен подключения kubeadm join 10.45.4.58:6443 --token ncb63c.pugf9xehkjakptqp --discovery-token-ca-cert-hash sha256:73cb40755a49b40f2a724984392f32fd7ff607a437da524619d4aba43a2c31b6

1. mkdir -p $HOME/.kube
2. cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
3. chown $(id -u):$(id -g) $HOME/.kube/config
4. export kubever=$(kubectl version | base64 | tr -d '\n'
5. kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$kubever"
6. systemctl restart kubelet

5.Установка kubernates worker-nodes (pods контейнеры)

1. yum install docker docker-containerd
2. systemctl start docker
3. systemctl enable docker
4. yum install -y kubelet kubeadm kubectl
5. systemctl enable kubelet
6. hostnamectl set-hostname worker-node

1. vi /etc/hosts

10.45.4.58 master-node 10.45.4.59 worker-node

1. sed -i '/swap/d' /etc/fstab
2. swapoff -a

Присоединяем worker-node к master:

1. kubeadm join 10.45.4.58:6443 --token ncb63c.pugf9xehkjakptqp --discovery-token-ca-cert-hash sha256:73cb40755a49b40f2a724984392f32fd7ff607a437da524619d4aba43a2c31b6
2. systemctl restart kubelet.service

5.Проверка работоспособности Создание deployment

1. vi deploy.yml

apiVersion : apps/v1 kind: Deployment metadata:

 name: my-web-deployment
 labels:
   app : my-k8s-application

spec:

 selector:
   matchLabels:
     project: kgb
 template:
   metadata:
     labels:
       project: kgb
   spec:
     containers:
       - name : kgb-web
         image: debian
         ports:
           - containerPort: 80

1. kubectl apply –f deploy.yml