Add files via upload

Author: ctienshi

centos/ansible.cfg

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+#Enter the IP Address of the Kubernetes Master node to the ad_addr variable.
+ad_addr: 192.168.2.1
+cidr_v: 172.16.0.0/16
+
+packages:
+- kubeadm
+- kubectl
+
+services:
+- docker
+- kubelet
+- firewalld
+
+ports:
+- "6443/tcp"
+- "10250/tcp"
+
+token_file: join_token

centos/env_variables

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+[kubernetes-master-nodes]
+kubernetes-master ansible_host=192.168.2.1
+
+[kubernetes-worker-nodes]
+kubernetes-worker ansible_host=192.168.2.2

centos/hosts

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+---
+- hosts: kubernetes-master-nodes
+  vars_files:
+  - env_variables
+  tasks:
+  - name: Pulling images required for setting up a Kubernetes cluster
+    shell: kubeadm config images pull
+
+  - name: Resetting kubeadm
+    shell: kubeadm reset -f
+    register: output
+
+  - name: Initializing Kubernetes cluster
+    shell: kubeadm init --apiserver-advertise-address {{ad_addr}} --pod-network-cidr={{cidr_v}}
+    register: output
+
+  - name: Storing Logs and Generated token for future purpose.
+    local_action: copy content={{ output.stdout }} dest=/home/centos/{{ token_file }}
+
+  - name: Copying required files
+    shell: |
+     mkdir -p $HOME/.kube
+     sudo cp -f /etc/kubernetes/admin.conf $HOME/.kube/config
+     sudo chown $(id -u):$(id -g) $HOME/.kube/config
+
+  - name: Install Network Add-on
+    command: kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

centos/playbooks/configure_master_node.yml

@@ -0,0 +1,13 @@
+---
+- hosts: kubernetes-worker-nodes
+  vars_files:
+  - env_variables
+  tasks:
+  - name: Copying token to worker nodes
+    copy: src=/home/centos/{{ token_file }} dest=/home/centos/join_token
+
+  - name: Joining worker nodes with kubernetes master
+    shell: |
+     kubeadm reset -f
+     cat /home/centos/join_token | tail -2 > out.sh
+     sh out.sh

centos/playbooks/configure_worker_nodes.yml

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+---
+- hosts: all
+  vars_files:
+  - env_variables
+  tasks:
+  - name: Disabling Swap on all nodes
+    shell: swapoff -a
+
+  - name: Commenting Swap entries in /etc/fstab
+    replace:
+     path: /etc/fstab
+     regexp: '(.*swap*)'
+     replace: '#\1'
+
+  

centos/playbooks/prerequisites.yml

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+---
+- hosts: all
+  vars_files:
+  - env_variables
+  tasks:
+  - name: Creating a repository file for Kubernetes
+    file:
+     path: /etc/yum.repos.d/kubernetes.repo
+     state: touch
+
+  - name: Adding repository details in Kubernetes repo file.
+    blockinfile:
+     path: /etc/yum.repos.d/kubernetes.repo
+     block: |
+      [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
+
+  - name: Installing Docker and firewalld
+    shell: |
+     yum install firewalld -y
+     yum install -y yum-utils device-mapper-persistent-data lvm2
+     yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
+     yum install docker-ce -y
+
+  - name: Installing required packages
+    yum:
+     name: "{{ item }}"
+     state: present
+    with_items: "{{ packages }}"
+
+  - name: Starting and Enabling the required services
+    service:
+     name: "{{ item }}"
+     state: started
+     enabled: yes
+    with_items: "{{ services }}"
+
+  - name: Allow Network Ports in Firewalld
+    firewalld:
+     port: "{{ item }}"
+     state: enabled
+     permanent: yes
+     immediate: yes
+    with_items: "{{ ports }}"
+
+  - name: Enabling Bridge Firewall Rule
+    shell: "echo '1' > /proc/sys/net/bridge/bridge-nf-call-iptables"

centos/playbooks/setting_up_nodes.yml

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+---
+- import_playbook: playbooks/prerequisites.yml
+- import_playbook: playbooks/setting_up_nodes.yml
+- import_playbook: playbooks/configure_master_node.yml

centos/setup_master_node.yml

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+---
+- import_playbook: playbooks/configure_worker_nodes.yml