Kubernetes Cluster over Multi-Cloud
Hello, In this article I am going to configure the Kubernetes cluster over multi-cloud means one instance over AWS, Azure, and One Local VM
Note-: All the steps are given in Red Hat Based Operating system, concept-wise same only some basic command varies.
Let’s start
How to Configure Kubernetes Master -:)
Either you can use a local VM or cloud
→ Configure this instance as
step1: Configure the Kubeadm Repo
Run command-: vim kubeadm.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
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
exclude=kubelet kubeadm kubectl
step2: Set the systemd
Run command → vim daemon.json
{
“exec-opts”: [“native.cgroupdriver=systemd”]
}
step3: Install docker
Run command → yum install docker -y
step4: Start the docker Service
Run command → systemctl start docker
step5: Downloading Kubeadm, kubelet, kubectl
Run Command
yum install -y kubelet kubeadm kubectl — disableexcludes=kubernetes
step6: Start the service of kubelet
Run Command
systemctl start kubelet
step7: pull require images
Run command
kubeadm config images pull
step8: Install the iproute-tc package
Run Command
yum install iproute-tc -y
step9: Initialize the cluster
Run Command
kubeadm init — pod-network-cidr=10.244.0.0/16
Here, — pod-network-cider=”you can use as your choice but if you change you have to edit also from other file otherwise cluster not work”
Note-: k8s cluster is little bit heavy, its need some more cpu so avoid this error use below option
— ignore-preflight-errors=NumCPU
— ignore-preflight-errors=Mem
step10: After Initialize the cluster they will give three commands run it without any hesitation okay.
Example given below-:
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
step11: Run Command to print joining command so that any worker node join
kubeadm token create — print-join-command
This command gives you one command, copy it, and run in the worker node so that the worker can join.
How to Configure the Kubernetes Worker Node
step1: Configure the Kubeadm Repo
Run command-: vim kubeadm.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
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
exclude=kubelet kubeadm kubectl
step2: Set the systemd
Run command → vim daemon.json
{
“exec-opts”: [“native.cgroupdriver=systemd”]
}
step3: Install docker
Run command → yum install docker -y
step4: Start the docker Service
Run command → systemctl start docker
step5: Downloading Kubeadm, kubelet, kubectl
Run Command
yum install -y kubelet kubeadm kubectl — disableexcludes=kubernetes
step6: Start the service of kubelet
Run Command
systemctl start kubelet
Now Join the Worker node to the master -:)
For this, we have only run the join command which we printed in master.
How to create multi-cloud setup -:)
I am going to launch the instance as follow
- One Over AWS
- One Over Azure
- One in Local VM
- Master Node in Local VM
- One Over AWS -:
Image_name: AMI Machine
Note-: You have to same steps which I tell you for worker node configuration.
2. One Over Azure -:
Image_name: Linux (redhat 8.2)
Note-: Same setup do which is for worker node
3. One in Local VM -:
Image_name: Red Hat Linux
Note-: Same for WorkerNode
4. Master Node in Local VM(you can use anywhere the step is same) -:
Image_name: Red Hat Linux
Note-: Do the same process which is for Kubernetes Master Node
At last, run the joining command to join with the master.
Keep Doing Keep Sharing
MD MOQADDAS
Extra Repo
Automate Ansible Cluster -: https://github.com/MDMOQADDAS/Launch-Kubernetes-Cluster-Over-AWS-using-Ansible.git
Configure k8s cluster using Ansible -: https://github.com/MDMOQADDAS/Ansible-role-for-configure-Kubernets-Clusture.git
See Soon
