Deploy Kubernetes with official aansible

First, the deployment environment

Reference article: Through the official Ansible deployment Kubernetes

Note: Because the installation of software needs to download the external network, so this document is only suitable for use in the extranet environment of the host, that can access: Google's host

1. Installation Host

This deployment uses exsi6.7 virtual machine CENTOS7, which is configured as table:

IP Address	Host	CPU	Memory
192.168.123.121	Master1	1	2G
192.168.123.122	Node1	1	2G
192.168.123.123	Node2	1	2G

2, set the host free-secret settings node name and add hosts:

Modify the/etc/hostname name and add node information in the/etc/hosts, respectively, in each host.

#修改为master1vim /etc/hostname#添加节点信息vim /etc/hosts192.168.123.121 master1192.168.123.122 node1192.168.123.123 node2

Add a free-secret setting

Add the encryption key pair to each host individually:

ssh-keygen -t rsa

Use Master1 as the publisher to make the other hosts free of secret settings:

ssh master1 "cat  >> ~/.ssh/authorized_keys" < ~/.ssh/id_rsa.pub

3, deploy Kubernetes Configuration installation environment, install the necessary software

yum install -y epel-releaseyum install -y ansible python-netaddr git

Download Kubernetes official Ansible Playbook Code

git clone "https://github.com/kubernetes/contrib.git"cd contrib/ansible

Configuring Ansible Playbook

Create a new Hosts file in the Inventory folder, and add the following:

[masters]master1[etcd:children]masters[nodes]node[1:2]

Use ansible to check if the nodes are connected:

ansible -i inventory/hosts all -m pingmaster1 | SUCCESS => {    "changed": false,     "ping": "pong"}node2 | SUCCESS => {    "changed": false,     "ping": "pong"}node1 | SUCCESS => {    "changed": false,     "ping": "pong"

Edit the Inventory/group_vars/all.yml file. Modify the following as follows:

source_type: packageManagercluster_name: cluster.kairennetworking: flannelcluster_logging: truecluster_monitoring: truekube_dash: truedns_setup: truedns_replicas: 1

Modify the Roles/flannel/defaults/main.yaml file as follows:

flannel_options: --iface=enp0s8

After the modification is complete, go to the Scripts directory and execute the following command to start the deployment:

INVENTORY=../inventory/hosts ./deploy-cluster.sh

Deployment takes a while, during the deployment process, the Ansible service will continue to report the installation process, we can know in real-time the installation to the specific step.

After the installation is complete, you can use Kubectl to view the node information:

kubectl get nodesNAME      STATUS    AGEnode1     Ready     41mnode2     Ready     41m

To view pod and SVC information:

kubectl get svc  --all-namespacesNAMESPACE     NAME                    CLUSTER-IP       EXTERNAL-IP   PORT(S)             AGEdefault       kubernetes              10.254.0.1       <none>        443/TCP             48mkube-system   elasticsearch-logging   10.254.195.56    <none>        9200/TCP            35mkube-system   heapster                10.254.184.180   <none>        80/TCP              35mkube-system   kibana-logging          10.254.154.10    <none>        5601/TCP            35mkube-system   kube-dns                10.254.0.10      <none>        53/UDP,53/TCP       35mkube-system   monitoring-grafana      10.254.192.97    <none>        80/TCP              35mkube-system   monitoring-influxdb     10.254.6.37      <none>        8083/TCP,8086/TCP   35m

Deploy Kubernetes with official aansible