Use Ansible to do kubernetes 1.10.3 Cluster High-availability one-click Deployment

Please be sure to keep the environment consistent

To download the required system packages during installation, be sure to connect all the nodes to the Internet .

Cluster node information for this installation

Lab environment: VMware's virtual machines

IP Address	Host name	CPU	Memory
192.168.77.133	K8s-m1	6 cores	6G
192.168.77.134	k8s-m2	6 cores	6G
192.168.77.135	K8s-m3	6 cores	6G
192.168.77.136	K8s-n1	6 cores	6G
192.168.77.137	K8s-n2	6 cores	6G
192.168.77.138	K8s-n3	6 cores	6G

In addition, a set of VIPs is provided by all master nodes 192.168.77.140 .

The cluster topology diagram for this installation image.png the role that was used this time

• Ansible Role System Environment "Epel Source Settings"
• "Hostnames" of Ansible Role system environment
• "Docker" of the Ansible Role container
• "Kubernetes" of Ansible Role container

Ansible role How to use please read the following article

• Ansible Role "How to use?" 】

Cluster installation method

Install kubernetes ha high availability cluster in static pod mode.

Ansible Managing node Operations

OS:CentOS Linux release 7.4.1708 (Core)
Ansible2.5.3

Installing Ansible

# yum -y install ansible# ansible --versionansible 2.5.3  config file = /etc/ansible/ansible.cfg  configured module search path = [u‘/root/.ansible/plugins/modules‘, u‘/usr/share/ansible/plugins/modules‘]  ansible python module location = /usr/lib/python2.7/site-packages/ansible  executable location = /usr/bin/ansible  python version = 2.7.5 (default, Aug  4 2017, 00:39:18) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]

Configure Ansible

# sed -i ‘s|#host_key_checking|host_key_checking|g‘ /etc/ansible/ansible.cfg

Download role

# yum -y install git# git clone https://github.com/kuailemy123/Ansible-roles.git /etc/ansible/roles正克隆到 ‘/etc/ansible/roles‘...remote: Counting objects: 1767, done.remote: Compressing objects: 100% (20/20), done.remote: Total 1767 (delta 5), reused 24 (delta 4), pack-reused 1738接收对象中: 100% (1767/1767), 427.96 KiB | 277.00 KiB/s, done.处理 delta 中: 100% (639/639), done.

Download Kubernetes-files.zip file

This is to adapt to the national conditions, export the required Google Docker image, convenient for everyone to use.

File download Link: https://pan.baidu.com/s/1BNMJLEVzCE8pvegtT7xjyQ Password:qm4k

# yum -y install unzip# unzip kubernetes-files.zip -d /etc/ansible/roles/kubernetes/files/

Configuring host Information

# cat /etc/ansible/hosts[k8s-master]192.168.77.133192.168.77.134192.168.77.135[k8s-node]192.168.77.136192.168.77.137192.168.77.138[k8s-cluster:children]k8s-masterk8s-node[k8s-cluster:vars]ansible_ssh_pass=123456

k8s-masterThe group is all master node hosts. k8s-nodeThe group is the host for all node nodes. k8s-cluster k8s-master k8s-node All hosts that contain and groups.

Note that the host name is in lowercase letters, and there is a problem with the host not found in uppercase letters.

Configure Playbook

# CAT/ETC/ANSIBLE/K8S.YML---# Initialize cluster-hosts:k8s-cluster serial:"100%" Any_errors_fatal:True VARs:-ipnames:' 192.168.77.133 ':' K8s-m1 '' 192.168.77.134 ':' K8s-m2 '' 192.168.77.135 ':' K8s-m3 '' 192.168.77.136 ':' K8s-n1 '' 192.168.77.137 ': k8s-n2 '  ' 192.168.77.138 ':  k8s-n3 ' Roles:-Hostnames-repo-epel-docker# Install master node-hosts:k8s-master any_errors_fatal: 
                     
                      true VARs:-kubernetes_master: 
                      TRUE-KUBERNETES_APISERVER_VIP: 192.168.77.140 roles:-Kubernetes# Install node node-hosts:k8s-node any_errors_fatal: true VARs:-kubernetes_node: TRUE-KUBERNETES_APISERVER_VIP: 192.168.77.140 roles:-Kubernetes # installation Addons application-Hosts:k8s-master any_errors_fatal: true VARs:-kubernetes_addons: true-kubernetes_ingress_controller : nginx-kubernetes_apiserver_vip:192.168.77.140 roles:-kubernetes       
                     

Kubernetes_ingress_controller can also choosetraefik

Executive Playbook

# ansible-playbook /etc/ansible/k8s.yml......real    26m44.153suser    1m53.698ssys 0m55.509s

Asciicast

Verifying the cluster version

# Kubectl Versionclient version:version. Info{major:"1", Minor:"Ten", Gitversion:"v1.10.3", Gitcommit:"2bba0127d85d5a46ab4b778548be28623b32d0b0", Gittreestate:"clean", Builddate:  "2018-05-21t09:17:39z", Goversion:"go1.9.3", Compiler:"GC", Platform:"Linux/amd64"}server Version: Version. Info{major:"1", Minor: "ten", Gitversion:"v1.10.3", Gitcommit:" 2bba0127d85d5a46ab4b778548be28623b32d0b0 ", Gittreestate:" clean ", Builddate:" 2018-05-21t09:05:37z ", Goversion:"go1.9.3", Compiler:"GC", Platform:"Linux/amd64"}      

Verifying cluster status

‘monitoring|heapster|influxdb‘kubectl -n ingress-nginx get podskubectl -n kube-system get po -l app=helmkubectl -n kube-system logs -f kube-scheduler-k8s-m2helm version

The result is not written here.

View Addons Access Information

On the first master server

Kubectl Cluster-infokubernetes Master is running at https://192.168.77.140:6443elasticsearch is running at Https:// 192.168.77.140:6443/api/v1/namespaces/kube-system/services/elasticsearch-logging/proxyheapster is running at HTTPS : //192.168.77.140:6443/api/v1/namespaces/kube-system/services/heapster/proxykibana is running at Https://192.168.77.140:6443/api/v1/namespaces/kube-system/services/ Kibana-logging/proxykube-dns is running at Https://192.168.77.140:6443/api/v1/ Namespaces/kube-system/services/kube-dns:dns/proxymonitoring-grafana is running at https: //192.168.77.140:6443/api/v1/namespaces/kube-system/services/monitoring-grafana/ Proxymonitoring-influxdb is running at Https://192.168.77.140:6443/api/v1/namespaces/ Kube-system/services/monitoring-influxdb:http/proxy       

# cat ~/k8s_addons_access

After the cluster deployment is complete, it is recommended that all nodes of the cluster be restarted.

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Use Ansible to do kubernetes 1.10.3 Cluster High-availability one-click Deployment