├── .gitignore
├── README.md
├── Vagrantfile
├── build_cluster.sh
├── docs
    ├── images
    │   └── vagrant_k8s.png
    └── tmp
    │   ├── Vagrantfile
    │   ├── build_cluster.sh
    │   ├── join.sh
    │   ├── kubeconfig.sh
    │   └── provision
    │       ├── base.sh
    │       └── master_init.sh
├── join.sh
├── node_init.sh
└── provision
    ├── base.sh
    └── master_init.sh


/.gitignore:
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1 | .vagrant


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/README.md:
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 1 | # *kubernetes-the-easy-way*
 2 | This repo will show the easy method to spin up fully function kubernetes cluster from scratch!
 3 | 
 4 | 
 5 | <img src="./docs/images/vagrant_k8s.png" align="center">
 6 | 
 7 | This repo will help one to setup our own vanilla kubernetes cluster setup in their local workstation from scratch. This is full pre-configured solutions and one can use this to just setup a cluster quick to play-around. Incase if you want to learn all the concepts deeply then I would highly recommend to follow [Kube Docs](https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/) or some sample setup guide like [Kube Hard way](https://github.com/kelseyhightower/kubernetes-the-hard-way)
 8 | 
 9 | ## Pre-requisite
10 | 
11 | In order to effectively use this script, we need following components to be installed prior running this script:
12 | 
13 | - Docker
14 | - Vagrant
15 | - Oracle Virtual box
16 | - Git
17 | 
18 | ## Trigger
19 | 
20 | All the configuration to build the clusters are predefined. To start,
21 | 
22 | Run `.build_cluster.sh`
23 | 
24 | This is spin up one master and two node k8s cluster with the all the needed componetes with latest version.
25 | 
26 | Post successful completion of the script:
27 | 
28 | ± You can login into the machine by running `vagrant ssh master` , ` vagrant ssh node1` and so on.
29 | 
30 | ## Tear Down
31 | 
32 | __To stop the VM__
33 | 
34 | Run `vagrant halt`
35 | 
36 | This is shutdown your vm gracefully.
37 | 
38 | __To destroy the VM__
39 | 
40 | Run `vagrant destroy`
41 | 
42 | This is destroy and free up the resources
43 | 
44 | For *forceful* delete
45 | 
46 | Run `vagrant destroy -f`
47 | 
48 | __To just reload(update the config)__
49 | 
50 | Run `vagrant reload`
51 | 
52 | This will ensure the latest update to the config files or script is reloaded
53 | 
54 | __ To bring the cluster up after deletion__
55 | 
56 | Run `vagrant up`
57 | 
58 | Will spin up a new cluster.
59 | 
60 | ## Follow-Me
61 | 
62 | :id:            [![Portfolio](https://img.shields.io/badge/GitHub-100000?style=for-the-badge&logo=github&logoColor=white)](https://github.com/premkumar-palanichamy)
63 | <p align="left">
64 | <a href="https://linkedin.com/in/premkumarpalanichamy" target="blank"><img align="center" src="https://raw.githubusercontent.com/rahuldkjain/github-profile-readme-generator/master/src/images/icons/Social/linked-in-alt.svg" alt="premkumarpalanichamy" height="30" width="30" /></a>
65 | </p>
66 | 
67 | 
68 | ### ~~Reference~~
69 | 
70 | Followed @pbacterio script and so credits to him :) 
71 | 
72 | Made small changes to make the script work smoothly and to run all the kubernetes components at its latest version. Also rectified the issue in connecting the nodes with the master automatically during creation process.
73 | 
74 | 
75 | 


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/Vagrantfile:
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 1 | # -*- mode: ruby -*-
 2 | # vi: set ft=ruby :
 3 | 
 4 | Vagrant.configure("2") do |config|
 5 |   config.vm.box = "debian/buster64"
 6 |   config.vm.provision "shell", path: "provision/base.sh"
 7 |   config.vm.synced_folder './', '/vagrant', disabled: true
 8 | 
 9 |   config.vm.define "master" do |master|
10 |     master.vm.hostname = "master"
11 |     master.vm.network "private_network", ip: "198.168.33.14"
12 |     master.vm.provision "shell", path: "provision/master_init.sh", privileged: false
13 |     for p in [:virtualbox, :libvirt] do
14 |       master.vm.provider p do |provider|
15 |         provider.memory = 2048
16 |         provider.cpus = 2
17 |       end
18 |     end
19 |   end
20 | 
21 |   (1..2).each do |i|
22 |     config.vm.define "node#{i}" do |node|
23 |       node.vm.hostname = "node#{i}"
24 |       node.vm.network "private_network", ip: "198.168.33.1#{i}"
25 |       for p in [:virtualbox, :libvirt] do
26 |         node.vm.provider p do |provider|
27 |           provider.memory = 2048
28 |           provider.cpus = 2
29 |         end 
30 |       end
31 |     end
32 |   end
33 | 
34 | end


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/build_cluster.sh:
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 1 | #!/bin/bash
 2 | set -x
 3 | #SLEEP_TIME="300"
 4 | vagrant up
 5 | 
 6 | rm join.sh; touch join.sh
 7 | 
 8 | #sleep ${SLEEP_TIME}
 9 | 
10 | cluster_token=$(vagrant ssh master -c 'kubeadm token create --print-join-command')
11 | 
12 | join_cmd="sudo ${cluster_token}"
13 | 
14 | 
15 | cat <<EOF > join.sh
16 | #!/bin/bash
17 | set -x
18 | $join_cmd
19 | EOF
20 | 
21 | #sleep 60
22 | 
23 | vagrant plugin install vagrant-scp
24 | 
25 | vagrant scp ./join.sh node1:join.sh
26 | vagrant ssh node1 -c 'chmod 777 join.sh'
27 | vagrant scp ./node_init.sh node1:node_init.sh
28 | vagrant ssh node1 -c 'chmod 777 node_init.sh'
29 | 
30 | vagrant scp ./join.sh node2:join.sh
31 | vagrant ssh node2 -c 'chmod 777 join.sh'
32 | vagrant scp ./node_init.sh node2:node_init.sh
33 | vagrant ssh node2 -c 'chmod 777 node_init.sh'
34 | 
35 | vagrant ssh node1 -c "./node_init.sh"
36 | vagrant ssh node2 -c "./node_init.sh"


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/docs/images/vagrant_k8s.png:
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https://raw.githubusercontent.com/devopshubproject/kubernetes-the-easy-way/f0cb23a3458ecc9c5a063444db1aa6260b24e78c/docs/images/vagrant_k8s.png


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/docs/tmp/Vagrantfile:
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 1 | # -*- mode: ruby -*-
 2 | # vi: set ft=ruby :
 3 | 
 4 | Vagrant.configure("2") do |config|
 5 |   # config.vm.box = "centos/7"
 6 |   config.vm.box = "debian/buster64"
 7 |   config.vm.provision "shell", path: "provision/base.sh"
 8 |   config.vm.synced_folder './', '/vagrant', disabled: true
 9 | 
10 |   config.vm.define "master" do |master|
11 |     master.vm.hostname = "master"
12 |     master.vm.network "private_network", ip: "192.168.88.20"
13 |     #master.vm.network "private_network", ip: "198.168.33.14"
14 |     master.vm.provision "shell", path: "provision/master_init.sh", privileged: false
15 |     for p in [:virtualbox, :libvirt] do
16 |       master.vm.provider p do |provider|
17 |         provider.memory = 2048
18 |         provider.cpus = 2
19 |       end
20 |     end
21 |   end
22 | 
23 |   (1..2).each do |i|
24 |     config.vm.define "node#{i}" do |node|
25 |       node.vm.hostname = "node#{i}"
26 |       node.vm.network "private_network", ip: "192.168.88.2#{i}"
27 |       #node.vm.network "private_network", ip: "198.168.33.1#{i}"
28 |       for p in [:virtualbox, :libvirt] do
29 |         node.vm.provider p do |provider|
30 |           provider.memory = 2048
31 |           provider.cpus = 2
32 |         end
33 |       #node.vm.provision "shell", path: "join.sh"  
34 |       end
35 |     end
36 |   end
37 | 
38 | end


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/docs/tmp/build_cluster.sh:
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 1 | #!/bin/bash
 2 | set -x
 3 | SLEEP_TIME="300"
 4 | vagrant up
 5 | 
 6 | ### ±±±±±±± To make kube master work
 7 | #vagrant plugin install vagrant-scp
 8 | #vagrant scp ./kubeconfig.sh master:kubeconfig.sh
 9 | #vagrant ssh master -c 'chmod 777 kubeconfig.sh'
10 | #vagrant ssh master -c './kubeconfig.sh -y'
11 | 
12 | rm join.sh; touch join.sh
13 | 
14 | #sleep ${SLEEP_TIME}
15 | 
16 | #cluster_token=$(vagrant ssh master -c 'kubeadm token create 2>/dev/null')
17 | #cluster_token=(vagrant ssh master -c 'kubeadm token create 2 > /dev/null')
18 | cluster_token=$(vagrant ssh master -c 'kubeadm token create --print-join-command')
19 | #join_cmd="sudo kubeadm join 192.168.88.20:6443 --token ${cluster_token:0:-1} --discovery-token-unsafe-skip-ca-verification"
20 | #join_cmd="sudo kubeadm join 198.168.33.14:6443 --token ${cluster_token:0:-1} --discovery-token-unsafe-skip-ca-verification"
21 | join_cmd="sudo ${cluster_token}"
22 | 
23 | #kubeadm token create --print-join-command > /vagrant/configs/join.sh
24 | 
25 | cat <<EOF > join.sh
26 | #!/bin/bash
27 | $join_cmd
28 | EOF
29 | 
30 | #sleep 60
31 | #vagrant ssh node1 -c '$join_cmd'
32 | vagrant plugin install vagrant-scp
33 | 
34 | vagrant scp ./join.sh node1:join.sh
35 | vagrant ssh node1 -c 'chmod 777 join.sh'
36 | vagrant ssh node1 -c "./join.sh"
37 | #vagrant ssh node1 -c "$join_cmd"
38 | #vagrant ssh node1 -c "$join_cmd --v=5"
39 | #vagrant ssh node2 -c "$join_cmd"
40 | ##vagrant ssh node1 -c 'sudo $cluster_token'
41 | #vagrant ssh node2 -c "sudo $cluster_token"


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/docs/tmp/join.sh:
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1 | #!/bin/bash
2 | sudo 
3 | 
4 | 
5 | timed out waiting for the condition
6 | To see the stack trace of this error execute with --v=5 or higher
7 | 


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/docs/tmp/kubeconfig.sh:
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1 | #!/bin/bash
2 | 
3 | mkdir -p $HOME/.kube
4 | sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
5 | sudo chown $(id -u):$(id -g) $HOME/.kube/config


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/docs/tmp/provision/base.sh:
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 1 | #!/bin/bash
 2 | set -x
 3 | 
 4 | apt-get update
 5 | apt-get -y install docker.io curl gnupg
 6 | 
 7 | cat <<EOF | tee /etc/sysctl.d/k8s.conf
 8 | net.bridge.bridge-nf-call-ip6tables = 1
 9 | net.bridge.bridge-nf-call-iptables = 1
10 | EOF
11 | sysctl --system
12 | 
13 | curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
14 | cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
15 | deb https://apt.kubernetes.io/ kubernetes-xenial main
16 | EOF
17 | apt-get update
18 | apt-get install -y kubelet kubeadm kubectl
19 | apt-mark hold kubelet kubeadm kubectl
20 | 
21 | swapoff -a
22 | sed -i '/swap/d' /etc/fstab


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/docs/tmp/provision/master_init.sh:
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 1 | #!/bin/bash
 2 | set -x
 3 | 
 4 | #sudo kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=192.168.88.20
 5 | sudo kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=198.168.33.14
 6 | 
 7 | mkdir -p $HOME/.kube
 8 | sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
 9 | sudo chown $(id -u):$(id -g) $HOME/.kube/config
10 | 
11 | kubectl apply -f https://github.com/coreos/flannel/raw/master/Documentation/kube-flannel.yml
12 | 
13 | echo 'source <(kubectl completion bash)' >> $HOME/.bashrc
14 | 


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/join.sh:
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1 | #!/bin/bash
2 | set -x
3 | sudo kubeadm join 198.168.33.14:6443 --token o50xdk.znr130xxnbe1wjht --discovery-token-ca-cert-hash sha256:ca009a7933b5538526f88bc4c1d53b96638186b6ebbd9ce4f57cb27c390e03fc 
4 | 


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/node_init.sh:
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1 | #!/bin/bash
2 | set -x
3 | 
4 | run=$(cat join.sh | sed '1,2d')
5 | 
6 | eval $run


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/provision/base.sh:
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 1 | #!/bin/bash
 2 | set -x
 3 | 
 4 | apt-get update
 5 | apt-get -y install docker.io curl gnupg
 6 | 
 7 | cat <<EOF | tee /etc/sysctl.d/k8s.conf
 8 | net.bridge.bridge-nf-call-ip6tables = 1
 9 | net.bridge.bridge-nf-call-iptables = 1
10 | EOF
11 | sysctl --system
12 | 
13 | curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
14 | cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
15 | deb https://apt.kubernetes.io/ kubernetes-xenial main
16 | EOF
17 | apt-get update
18 | apt-get install -y kubelet kubeadm kubectl
19 | apt-mark hold kubelet kubeadm kubectl
20 | 
21 | swapoff -a
22 | sed -i '/swap/d' /etc/fstab


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/provision/master_init.sh:
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 1 | #!/bin/bash
 2 | set -x
 3 | 
 4 | sudo kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=198.168.33.14
 5 | 
 6 | mkdir -p $HOME/.kube
 7 | sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
 8 | sudo chown $(id -u):$(id -g) $HOME/.kube/config
 9 | 
10 | kubectl apply -f https://github.com/coreos/flannel/raw/master/Documentation/kube-flannel.yml
11 | 
12 | echo 'source <(kubectl completion bash)' >> $HOME/.bashrc
13 | 


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