一、基础环境
- docker版本1.12.6
- CentOS 7
1.准备好要部署的机器
IP | ROLE |
172.30.33.89 | k8s-registry-lb |
172.30.33.90 | k8s-master01-etcd01 |
172.30.33.91 | k8s-master02-etcd02 |
172.30.33.92 | k8s-master03-etcd03 |
172.30.33.93 | k8s-node01-ingress01 |
172.30.33.94 | k8s-node02-ingress02 |
172.30.33.31 | ansible-client |
2.准备部署机器 ansible-client
3.准备所需要镜像,由于被墙，所需镜像可以在百度云去下载，点击这里
IMAGE | VERSION |
quay.io/coreos/hyperkube | v1.6.7_coreos.0 |
quay.io/coreos/etcd | v3.1.10 |
calico/ctl | v1.1.3 |
calico/node | v2.4.1 |
calico/cni | v1.10.0 |
calico/kube-policy-controller | v0.7.0 |
quay.io/calico/routereflector | v0.3.0 |
gcr.io/google_containers/kubernetes-dashboard-amd64 | v1.6.3 |
gcr.io/google_containers/nginx-ingress-controller | 0.9.0-beta.11 |
gcr.io/google_containers/defaultbackend | 1.3 |
gcr.io/google_containers/cluster-proportional-autoscaler-amd64 | 1.1.1 |
gcr.io/google_containers/fluentd-elasticsearch | 1.22 |
gcr.io/google_containers/kibana | v4.6.1 |
gcr.io/google_containers/elasticsearch | v2.4.1 |
gcr.io/google_containers/k8s-dns-sidecar-amd64 | 1.14.4 |
gcr.io/google_containers/k8s-dns-kube-dns-amd64 | 1.14.4 |
gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64 | 1.14.4 |
andyshinn/dnsmasq | 2.72 |
nginx | 1.11.4-alpine |
gcr.io/google_containers/heapster-grafana-amd64 | v4.4.1 |
gcr.io/google_containers/heapster-amd64 | v1.4.0 |
gcr.io/google_containers/heapster-influxdb-amd64 | v1.1.1 |
gcr.io/google_containers/pause-amd64 | 3.0 |
lachlanevenson/k8s-helm | v2.2.2 |
gcr.io/kubernetes-helm/tiller | v2.2.2 |
4.load所有下载的镜像
# 在ansible-client上操作
$ IP=(172.30.33.89 172.30.33.90 172.30.33.91 172.30.33.92 172.30.33.93 172.30.33.94) $ for i in ${IP[*]}; do scp -r kubespray_images_v1.6.7 $i:~/; done # 对所有要部署的节点操作 $ IMAGES=$(ls -l ~/kubespray_images_v1.6.7|awk -F' ' '{ print $9 }') $ for x in ${images[*]}; do docker load -i kubespray_images_v1.6.7/$x; done
二、搭建集群
1.获取kubespray源码
$ git clone https://github.com/kubernetes-incubator/kubespray.git
2.编辑配置文件
$ vim ~/kubespray/inventory/group_vars/k8s-cluster.yml
---
# 启动集群的基础系统,支持ubuntu, coreos, centos, none
bootstrap_os: centos
# etcd数据存放位置
etcd_data_dir: /var/lib/etcd
# kubernetes所需二进制文件将要安装的位置
bin_dir: /usr/local/bin
# kubrnetes配置文件存放目录 kube_config_dir: /etc/kubernetes # 生成证书和token的脚本的存放位置 kube_script_dir: "{ { bin_dir } }/kubernetes-scripts" # kubernetes manifest文件存放目录 kube_manifest_dir: "{ { kube_config_dir } }/manifests" # kubernetes 命名空间 system_namespace: kube-system # 日志存放位置 kube_log_dir: "/var/log/kubernetes" # kubernetes证书存放位置 kube_cert_dir: "{ { kube_config_dir } }/ssl" # kubernetes token存放位置 kube_token_dir: "{ { kube_config_dir } }/tokens" # basic auth 认证文件存放位置 kube_users_dir: "{ { kube_config_dir } }/users" # 关闭匿名授权 kube_api_anonymous_auth: false ## kubernetes使用版本 kube_version: v1.6.7 # 安装过程中缓存文件下载位置(最少1G) local_release_dir: "/tmp/releases" # 重试次数，比如下载失败等情况 retry_stagger: 5 # 证书组 kube_cert_group: kube-cert # 集群日志等级 kube_log_level: 2 # HTTP下api server的basic auth认证用户名密码 kube_api_pwd: "test123" kube_users: kube: pass: "{ {kube_api_pwd} }" role: admin root: pass: "{ {kube_api_pwd} }" role: admin ## 开关认证 (basic auth, static token auth) #kube_oidc_auth: false #kube_basic_auth: false #kube_token_auth: false ## Variables for OpenID Connect Configuration https://kubernetes.io/docs/admin/authentication/ ## To use OpenID you have to deploy additional an OpenID Provider (e.g Dex, Keycloak, ...) # kube_oidc_url: https:// ... # kube_oidc_client_id: kubernetes ## Optional settings for OIDC # kube_oidc_ca_file: { { kube_cert_dir } }/ca.pem # kube_oidc_username_claim: sub # kube_oidc_groups_claim: groups # 网络插件 (calico, weave or flannel) kube_network_plugin: calico # 开启 kubernetes network policies enable_network_policy: false # Kubernetes 服务的地址范围. kube_service_addresses: 10.233.0.0/18 # pod 地址范围 kube_pods_subnet: 10.233.64.0/18 # 网络节点大小分配 kube_network_node_prefix: 24 # api server 监听地址及端口 kube_apiserver_ip: "{ { kube_service_addresses|ipaddr('net')|ipaddr(1)|ipaddr('address') } }" kube_apiserver_port: 6443 # (https) kube_apiserver_insecure_port: 8080 # (http) # 默认dns后缀 cluster_name: cluster.local # 为使用主机网络的pods使用/etc/resolv.conf解析DNS的子域 ndots: 2 # DNS 组件dnsmasq_kubedns/kubedns dns_mode: dnsmasq_kubedns # dns模式，可以是 docker_dns, host_resolvconf or none resolvconf_mode: docker_dns # 部署netchecker来检测DNS和HTTP状态 deploy_netchecker: false # skydns service IP配置 skydns_server: "{ { kube_service_addresses|ipaddr('net')|ipaddr(3)|ipaddr('address') } }" dns_server: "{ { kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address') } }" dns_domain: "{ { cluster_name } }" # docker 存储目录 docker_daemon_graph: "/var/lib/docker" ## A string of extra options to pass to the docker daemon. ## This string should be exactly as you wish it to appear. ## An obvious use case is allowing insecure-registry access ## to self hosted registries like so: docker_options: "--insecure-registry={ { kube_service_addresses } } --graph={ { docker_daemon_graph } } --iptables=false --storage-driver=devicemapper" docker_bin_dir: "/usr/bin" # 组件部署方式 # Settings for containerized control plane (etcd/kubelet/secrets) etcd_deployment_type: docker kubelet_deployment_type: docker cert_management: script vault_deployment_type: docker # K8s image pull policy (imagePullPolicy) k8s_image_pull_policy: IfNotPresent # Monitoring apps for k8s efk_enabled: true # Helm deployment helm_enabled: false
3.生成集群配置
配置完基本集群参数后，还需要生成一个集群配置文件，用于指定需要在哪几台服务器安装，和指定 master、node 节点分布，以及 etcd 集群等安装在那几台机器上。
# 定义集群IP
$ IP=(172.30.33.89 172.30.33.90 172.30.33.91 172.30.33.92 172.30.33.93 172.30.33.94) # 利用kubespray自带的python脚本生成配置 $ CONFIG_FILE=~/kubespray/inventory/inventory.cfg python3 ~/kubespray/contrib/inventory_builder/inventory.py ${ IP[*] }
生成的配置如下，最好是在配置上加上ansible_user=root,我最开始在搭建的时候没有指定，报错了
node1 ansible_user=root ansible_host=172.30.33.90 ip=172.30.33.90 node2 ansible_user=root ansible_host=172.30.33.91 ip=172.30.33.91 node3 ansible_user=root ansible_host=172.30.33.92 ip=172.30.33.92 node4 ansible_user=root ansible_host=172.30.33.93 ip=172.30.33.93 node5 ansible_user=root ansible_host=172.30.33.94 ip=172.30.33.94 [kube-master] node1 node2 node3 [kube-node] node1 node2 node3 node4 node5 [etcd] node1 node2 node3 [k8s-cluster:children] kube-node kube-master [calico-rr]
5.docker,efk,etcd配置修改
提前修改ansbile中有关docker,efk,etcd的配置，因为后面在部署的过程中，ansible会检测docker的版本并下载最新的版本，但是由于墙的原因，导致无法下载，会一直卡在下载的地方，所以这里，我们要提前修改，同时需要升级etcd的版本，默认的3.0.6的版本，存在不稳定因素。
修改docker配置,将下面关于docker安装的部分全部注释掉
vim ~/kubespray/roles/docker/tasks/main.yml
# - name: ensure docker repository public key is installed
# action: "{ { docker_repo_key_info.pkg_key } }"
# args:
# id: "{ {item} }"
# keyserver: "{ {docker_repo_key_info.keyserver} }" # state: present # register: keyserver_task_result # until: keyserver_task_result|succeeded # retries: 4 # delay: "{ { retry_stagger | random + 3 } }" # with_items: "{ { docker_repo_key_info.repo_keys } }" # when: not (ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] or is_atomic) # - name: ensure docker repository is enabled # action: "{ { docker_repo_info.pkg_repo } }" # args: # repo: "{ {item} }" # state: present # with_items: "{ { docker_repo_info.repos } }" # when: not (ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] or is_atomic) and (docker_repo_info.repos|length > 0) # - name: Configure docker repository on RedHat/CentOS # template: # src: "rh_docker.repo.j2" # dest: "/etc/yum.repos.d/docker.repo" # when: ansible_distribution in ["CentOS","RedHat"] and not is_atomic # - name: ensure docker packages are installed # action: "{ { docker_package_info.pkg_mgr } }" # args: # pkg: "{ {item.name} }" # force: "{ {item.force|default(omit)} }" # state: present # register: docker_task_result # until: docker_task_result|succeeded # retries: 4 # delay: "{ { retry_stagger | random + 3 } }" # with_items: "{ { docker_package_info.pkgs } }" # notify: restart docker # when: not (ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] or is_atomic) and (docker_package_info.pkgs|length > 0) # 如果你是自己安装的docker,记得将这段注释掉,除非你觉得template中的docker.service你能用 #- name: Set docker systemd config # include: systemd.yml
修改efk配置，注释掉KIBANA_BASE_URL这段，否则后面你搭建efk之后，无法访问kibana
vim ~/kubespray/roles/kubernetes-apps/efk/kibana/templates/kibana-deployment.yml.j2
# - name: "KIBANA_BASE_URL"
# value: "{ { kibana_base_url } }"
修改download配置，更改etcd和kubedns版本
1.6.7版本中,为了使用更高版本的calico node,我自己多添加了一个变量calico_node_version
vim ~/kubespray/roles/download/defaults/main.yml
etcd_version: v3.1.10
calico_node_version: "v2.4.1"
kubedns_version: 1.14.4
calico_policy_version: "v0.7.0"
注意: 如果你修改了kubedns_version版本，那么也需要修改/root/kubespray/roles/kubernetes-apps/ansible/defaults/main.yml文件中的kubedns_version版本
(可选)6.修改docker.service
# 如果你的docker.service中没有MountFlags则不需要这一步
# 注释掉/usr/lib/systemd/system/docker.service 中的MountFlags=slave
7.在ansible-client上一键部署
$ ansible-playbook -i ~/kubespray/inventory/inventory.cfg cluster.yml -b -v --private-key=~/.ssh/id_rsa
部署成功后如下
相关node信息
相关pod信息
