rke拉起k8s集群
在所有的机器上:1.关闭selinux:sed -i '/^SELINUX/s/enforcing/disabled/' /etc/selinux/configsetenforce 02.设置IPV4转发cat >> /etc/sysctl.conf << ENDnet.ipv4.ip_forward = 1net.bridge.bridge...
在所有的机器上:
1.关闭selinux:
sed -i '/^SELINUX/s/enforcing/disabled/' /etc/selinux/config
setenforce 0
2.设置IPV4转发
cat >> /etc/sysctl.conf << END
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
END
#执行如下命令生效
sysctl -p
若出现下面报错:
[root@k8s-master ~]# sysctl -p
net.ipv4.ip_forward = 1
sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-ip6tables: No such file or directory
sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory
执行下面的操作:
modprobe br_netfilter
sysctl -p
3.设置防火墙策略:
关闭防火墙:
systemctl stop firewalld
关闭swap:
sed -i '/swap/s/^/#/g' /etc/fstab
mount -a
4.启用cgroup
修改配置文件/etc/default/grub,启用cgroup内存限额功能,配置两个参数:
vim /etc/default/grub
##在文件中加入下面语句
GRUB_CMDLINE_LINUX_DEFAULT="cgroup_enable=memory swapaccount=1"
GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"
运行下面命令使得上面设置生效
grub2-mkconfig -o /boot/grub2/grub.cfg
5.在各个节点创建docker_user用户将docker_user用户加入到docker组,因为rke要使用docker组用户对于/var/run/docker.sock对docker进行远程操作。
useradd docker_user
usermod -aG docker docker_user
6.在主节点上创建rke用户:(Centos系列的系统的root用户不能用来起rke。)
useradd rke
6.设置rke服务器到各个节点的ssh免密:
在三个节点上创建ssh用户:
user add docker_user
ssh-keygen
ssh-copy-id -i docker_user@rke
ssh-copy-id -i docker_user@rkenode1
ssh-copy-id -i docker_user@rkenode2
7.下载rke包:https://github.com/rancher/rke/releases
8.编辑cluster.yml文件,文件中写入:(需要根据自己的情况对文件进行编辑)
nodes:
- address: 10.0.32.175
user: docker_user
role: [controlplane,etcd]
- address: 10.0.32.177
user: docker_user
ssh_key_path: ~/.ssh/id_rsa
role: [worker]
- address: 10.0.32.178
ssh_key_path: ~/.ssh/id_rsa
user: docker_user
role: [worker]
services:
etcd:
image: quay.io/coreos/etcd:latest
kube-api:
pod_security_policy: false
image: rancher/k8s:v1.8.5-rancher4
service_cluster_ip_range: 10.233.0.0/18
kube-controller:
cluster_cidr: 10.233.64.0/18
image: rancher/k8s:v1.8.5-rancher4
scheduler:
image: rancher/k8s:v1.8.5-rancher4
kubelet:
cluster_domain: cluster.local
cluster_dns_server: 10.233.0.3
infra_container_image: gcr.io/google_containers/pause-amd64:3.0
image: rancher/k8s:v1.8.5-rancher4
kubeproxy:
image: rancher/k8s:v1.8.5-rancher4
network:
plugin: flannel
system_images:
flannel: rancher/coreos-flannel:v0.9.1
kubedns: rancher/k8s-dns-kube-dns-amd64:1.14.5
dnsmasq: rancher/k8s-dns-dnsmasq-nanny-amd64:1.14.5
kubedns_sidecar: rancher/k8s-dns-sidecar-amd64:1.14.5
kubedns_autoscaler: rancher/cluster-proportional-autoscaler-amd64:1.0.0
dashboard: k8s.gcr.io/kubernetes-dashboard-amd64:v1.8.3
authentication:
strategy: x509
下面的镜像需要科学上网进行操作,如果没有这个包集群的网络组件起不来
infra_container_image: gcr.io/google_containers/pause-amd64:3.0
9. ./rke up(使用rke用户)
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