kubernetes

[view] kubectl get pods --all-namespaces kubectl get nodes

[master] centos 7 :

1. Disable SELinux & setup firewall rules

• sudo systemctl disable firewalld
• sudo systemctl stop firewalld
• sudo setenforce 0

2. Edit /etc/hosts => 192.168.1.30 k8s-master 192.168.1.40 worker-node1 192.168.1.50 worker-node2

3. Edit yum repo(/etc/yum.repos.d/kubernetes.repo)

[kubernetes] name=Kubernetes baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

4. docker install

• sudo yum install kubeadm docker -y

5. Start and enable kubectl and docker service [root@k8s-master ~]# systemctl restart docker && systemctl enable docker [root@k8s-master ~]# systemctl restart kubelet && systemctl enable kubelet

6. swap off

• sudo swapoff -a

7. Initialize Kubernetes Master with ‘kubeadm init’

• sudo kubeadm reset
• sudo kubeadm init --apiserver-advertise-address=xx.xxx.xxx.xxx
  • if it has a problem.
    • netstat -lnp | grep "duplicated port"
    • kill port

8. Execute the beneath commands to use the cluster as root user mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config

9. kubectl get nodes

10. kubectl get pods --all-namespaces

[참조]

• https://www.linuxtechi.com/install-kubernetes-1-7-centos7-rhel7/
• https://kubernetes.io/docs/getting-started-guides/centos/centos_manual_config/#prerequisites
• http://blog.madhukaraphatak.com/scaling-spark-with-kubernetes-part-5/

[slave]

1. Disable SELinux & configure firewall rules on both the nodes

• sudo setenforce 0

2. Configure Kubernetes Repositories on both worker nodes -Edit yum repo(/etc/yum.repos.d/kubernetes.repo) [kubernetes] name=Kubernetes baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

3. Install kubeadm and docker package on both nodes

• sudo yum install kubeadm docker -y

4. Start and enable docker service [root@k8s-master ~]# systemctl restart docker && systemctl enable docker [root@k8s-master ~]# systemctl restart kubelet && systemctl enable kubelet

5.kubeadm join --token 5bcd73.aa70895034d49003 xx.xxx.xx.xx:6443 --discovery-token-ca-cert-hash sha256:04e3eeb0bcde2356f71fa2c5c2f7db0ec7f08864a8a794aa92f9745b9aa28ea6

6. kubectl get nodes

[참조]

• kubernetes/kubernetes#53333

kubeadm join --token 5bcd73.aa70895034d49003 10.176.93.38:6443 --discovery-token-ca-cert-hash sha256:04e3eeb0bcde2356f71fa2c5c2f7db0ec7f08864a8a794aa92f9745b9aa28ea6

[spark]

1. kubectl create -f spark-master.yaml
2. kubectl create -f spark-master-service.yaml
3. kubectl create -f spark-worker.yaml
4. kubectl create -f spark-worker-resource.yaml
5. kubectl get po
6. kubectl describe svc spark-master
7. kubectl port-forward spark-master-498980536-kfgg8 8080:8080
8. kubectl delete po,svc --all
9. kubectl get nodes
10. kubectl describe svc

[참조]

• http://bryans.tistory.com/281