[云原生微服务架构]（一）Kubernetes集群安装
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基本环境说明
三台 VMware （v16.2.3）虚拟机
centos7（release 7.9.2009）系统
1.1 修改源镜像地址
# 更新yum
yum -y update
# 安装wget命令
yum -y install wget
# ！！！ 以下内容可以不做
# 要备份系统自带的源镜像地址
# 一定要备份，出现问题可以回退
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
# 下载阿里云的源镜像地址，此步骤可能导致yum无法使用，慎重操作！！！
# 注意使用aliyun可能会出现以下问题。如果出现问题，可以换回自带的镜像源即可
# Contact the upstream for the repository and get them to fix the problem
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
# 生成缓存
yum makecache1.2 关闭、禁用防火墙
# 关闭防火墙
systemctl stop firewalld
# 开机禁用
systemctl disable firewalld
# 查看防火墙状态
systemctl status firewalld
# 临时关闭selinux
setenforce 0
# 永久关闭， 编辑/etc/selinux/config，将SELINUX更改为disabled
vim /etc/selinux/config
# 修改内容如下
SELINUX=disabled1.3 关闭iptables服务
# 关闭iptables
systemctl stop iptables
# 开机禁用
systemctl disable iptables1.4 关闭 swap
swap会将部分内存数据存放到磁盘中导致性能下降，并且会导致系统运行时未知错误。
# 关闭swap
swapoff -a
# 修改“/etc/fstab”文件，注释掉SWAP的自动挂载（加符号“#”）
vim /etc/fstab
# 在“/dev/mapper/centos-swap”行前面添加"#",如下：
# /dev/mapper/centos-swap swap swap defaults 0 0
# free查看内存和swap，其中swap为0
free -m1.5 同步时间
chronyd是一个后台运行的守护进程,用于调整内核中运行的系统时钟和时钟服务器同步。
# 安装chrony
yum install chrony
# 配置（每个服务器都配置）
cat > /etc/chrong.conf <<-'EOF'
pool 192.168.37.127 iburst #时间服务器
driftfile /var/lib/chrony/drift
makestep 1.0.3
rtcsync
allow 192.168.37.0/24 //限制的网段
local stratum 10
keyfile /etc/chrong.keys
leapsectz /right/UTC
logdir /var/log/chrony
EOF
# 强制同步时钟时间
chronyc -a makestep
# 启动
systemctl start chronyd
# 开机启动
systemctl enable chronyd
# 查看时间同步状态
chronyc sources -v2 每台机器上安装 docker
2.1 配置安装源和安装docker
# 安装相关依赖包
yum install -y yum-utils device-mapper-persistent-data lvm2
# 必须添加镜像源，默认是找不到docker-ce
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 安装docker版本时18.09.6
yum install -y docker-ce-18.09.6 docker-ce-cli-18.09.6 containerd.io
# 设置开机启动
systemctl enable docker.service
2.2 修改 docker 配置文件
# 修改docker配置，如果在/etc/docker目录下没有此文件，创建一个即可。
vim /etc/docker/daemon.json
# 修改内容如下
{
"registry-mirrors":["https://obww7jh1.mirror.aliyuncs.com"],##自己的镜像源
"exec-opts": ["native.cgroupdriver=systemd"]
}
# 刷新配置
systemctl daemon-reload
# 重启docker
systemctl restart docker
# 启动docker
systemctl start docker3 安装k8s
3.1 在每台机器上创建 /etc/sysctl.d/k8s.conf 文件
# 进入“/etc/sysctl.d”目录
cd /etc/sysctl.d
# 创建k8s.conf文件
touch k8s.conf
# 编辑k8s.conf
vim k8s.conf
# 添加内容如下
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
# 使得配置文件生效
# 向内核中添加模块
modprobe br_netfilter
# 查看是否加载成功
lsmod | grep br_netfilter
# 向内核中添加配置参数
# sysctl -p 从指定的文件加载系统参数
sysctl -p /etc/sysctl.d/k8s.conf
# 查看系统参数
sysctl -a
3.2 在每台机器上安装 kubelet、kubeadm、kubectl
# 进入“/etc/yum.repos.d/”目录下
cd /etc/yum.repos.d/
# 创建“kubernetes.repo”文件
touch kubernetes.repo
# 添加的内容如下：
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgchech=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
# 安装k8s
yum install kubelet-1.18.6 kubeadm-1.18.6 kubectl-1.18.6 -y
# 设置开机启动
systemctl enable kubelet
# 查看kubelet状态
# Active: active (running)是启动状态
systemctl status kubelet
# 停止kubelet
systemctl stop kubelet
# 启动kubelet
systemctl start kubelet
# 注意在kubeadm init之前kubelet会不断重启
# 这个属于正常，初始化（kubeadm init）或者加入到集群后就好了，状态和报错如下：
activating (auto-restart)
open /var/lib/kubelet/config.yaml: no such file or directory
kubelet.service: main process exited, code=exited, status=255/n/a3.3 安装master节点必须的镜像（此步骤可以省略）
此步骤解决在初始化集群时无法连接网络的问题。此步骤可以省略，如果省略此步，在初始化集群时比较慢。
（1）查看需要的镜像名称
# 查看需要的镜像
# 注意:此处列出的版本可能不是（1.18.6)，下面下载镜像时，版本设置一致。
kubeadm config images list
（2）在master节点下载镜像
创建download.sh脚本（注意设置脚本权限为可执行）
# 创建文件
touch download.sh
# 设置执行权限
chmod 777 download.sh
脚本内容如下（脚本内容是上一步中的镜像名称），注意版本是1.18.6
images=(
kube-apiserver:v1.18.6
kube-controller-manager:v1.18.6
kube-scheduler:v1.18.6
kube-proxy:v1.18.6
pause:3.2
etcd:3.4.3-0
coredns:1.6.7
)
for imageName in ${images[@]};do
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/$imageName
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/$imageName k8s.gcr.io/$imageName
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/$imageName
done4 集群配置
4.1 配置IP
iP 主机名 安装的组件
192.168.219.138 master01 docker，kubectl，kubeadm，kubelet
192.168.219.139 node01 docker，kubectl，kubeadm，kubelet
192.168.219.140 node02 docker，kubectl，kubeadm，kubelet
使用vim在“/etc/hosts”文件中添加如下（注意是hosts文件，不是host文件）：
192.168.219.138 master01
192.168.219.139 node01
192.168.219.140 node02
**10.修改主机名**
在192.168.219.138上：
hostnamectl set-hostname master01
在192.168.219.139上：
hostnamectl set-hostname node01
在192.168.219.140上：
hostnamectl set-hostname node014.2 初始化集群（master结点运行即可)
（1）初始化配置
注意，如果用虚拟机，内核数量必须要2个及以上。
–image-repository 镜像加速，指定初始化下载的镜像。
–apiserver-advertise-address 直接使用当前master主机地址
–kubernetes-version k8s版本，可以不指定，缺省情况会用最新的
–service-cidr service网络地址(建议使用10.96.0.0/12，也可以不设置)，不可与主机，pod网络地址重复
–pod-network-cidr pod网络地址(建议使用10.244.0.0/16)，不可与主机，service网络地址重复，与后面的Calico相关
–v 日志等级，5级以上会打印更详细的日志，–v=6开启详细日志打印
kubeadm init \
--image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers \
--apiserver-advertise-address=192.168.219.138 \
--kubernetes-version=v1.18.6 \
--service-cidr=10.96.0.0/12 \
--pod-network-cidr=10.244.0.0/16 \
--v=6（2）初始化过程日志
初始化过程用时比较长，看着有点像卡死了，过程中不要着急。如果提前安装了相关的必须的镜像（参考3.3安装master节点必须的镜像 ），此步骤会很快。
I0324 08:38:26.200736 3876 initconfiguration.go:103] detected and using CRI socket: /var/run/dockershim.sock
W0324 08:38:26.201010 3876 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.18.6
[preflight] Running pre-flight checks
…….
省略日志
…….
[addons] Applied essential addon: kube-proxy
I0324 09:05:52.343813 3876 loader.go:375] Config loaded from file: /etc/kubernetes/admin.conf
I0324 09:05:52.344350 3876 loader.go:375] Config loaded from file: /etc/kubernetes/admin.conf
表示成功
Your Kubernetes control-plane has initialized successfully!
设置集群
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
You should now deploy a pod network to the cluster.
Run “kubectl apply -f [podnetwork].yaml” with one of the options listed at:
kubernetes.io/docs/concepts/cluste...
在将结点加入到集群中，注意下面的token（24小时后过期）
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.21.138:6443 –token xsyfqa.5ks6s1o5gjm420hw
–discovery-token-ca-cert-hash sha256:95820e52b1a85fd3e6733f8d39e85644423f7c40ffcb4165fdf234cd7c840a09
（3）配置集群
在master结点执行以下命令
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config如果不执行上面的命令，可能会出现下面的问题
Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of
“crypto/rsa: verification error” while trying to verify candidate authority certificate “kubernetes”)
在每个结点执行下面的命令
注意：执行下面命令之前，子结点可能一直是activating (auto-restart)
kubeadm join 192.168.21.138:6443 --token xsyfqa.5ks6s1o5gjm420hw \
--discovery-token-ca-cert-hash sha256:95820e52b1a85fd3e6733f8d39e85644423f7c40ffcb4165fdf234cd7c840a09 （4）管理token和discovery-token-ca-cert-hash
# 查看token
kubeadm token list
# 创建token
kubeadm token create
# 查看discovery-token-ca-cert-hash
openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //'
（5） 节点管理
# 在master节点上查看集群结点
kubectl get nodes
# 删除节点
# 删除节点后，需要在相应的子节点
kubectl delete nodes node1
# 重置节点，当遇到无法解决的问题时使用此方法，不过一定要慎重
kubeadm reset4.3 安装Flannel网络插件（master结点运行即可)
安装网络插件只需要在master节点即可，Flannel的主要作用是实现Pod资源跨主机进行网络通信。也可以将网络插件Flannel换成 Calico，它们的作用相同。Calico 是一种开源网络和网络安全解决方案，适用于容器，虚拟机和基于主机的本机工作负载。
下载配置文件
####
网上直接下载可能不能请求github文件需要修改以下kube-flannel.yml文件可直接复制 运行既可
kubectl apply -f kube-flannel.yml---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: psp.flannel.unprivileged
annotations:
seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/default
seccomp.security.alpha.kubernetes.io/defaultProfileName: docker/default
apparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/default
apparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default
spec:
privileged: false
volumes:
- configMap
- secret
- emptyDir
- hostPath
allowedHostPaths:
- pathPrefix: "/etc/cni/net.d"
- pathPrefix: "/etc/kube-flannel"
- pathPrefix: "/run/flannel"
readOnlyRootFilesystem: false
# Users and groups
runAsUser:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
fsGroup:
rule: RunAsAny
# Privilege Escalation
allowPrivilegeEscalation: false
defaultAllowPrivilegeEscalation: false
# Capabilities
allowedCapabilities: ['NET_ADMIN']
defaultAddCapabilities: []
requiredDropCapabilities: []
# Host namespaces
hostPID: false
hostIPC: false
hostNetwork: true
hostPorts:
- min: 0
max: 65535
# SELinux
seLinux:
# SELinux is unused in CaaSP
rule: 'RunAsAny'
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: flannel
rules:
- apiGroups: ['extensions']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames: ['psp.flannel.unprivileged']
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: flannel
namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: flannel
namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
name: kube-flannel-cfg
namespace: kube-system
labels:
tier: node
app: flannel
data:
cni-conf.json: |
{
"name": "cbr0",
"cniVersion": "0.3.1",
"plugins": [
{
"type": "flannel",
"delegate": {
"hairpinMode": true,
"isDefaultGateway": true
}
},
{
"type": "portmap",
"capabilities": {
"portMappings": true
}
}
]
}
net-conf.json: |
{
"Network": "10.244.0.0/16",
"Backend": {
"Type": "vxlan"
}
}
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-amd64
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
- key: kubernetes.io/arch
operator: In
values:
- amd64
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:amd64
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:amd64
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-arm64
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
- key: kubernetes.io/arch
operator: In
values:
- arm64
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:arm64
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:arm64
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-arm
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
- key: kubernetes.io/arch
operator: In
values:
- arm
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:arm
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:arm
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-ppc64le
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
- key: kubernetes.io/arch
operator: In
values:
- ppc64le
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:ppc64le
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:ppc64le
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-s390x
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
- key: kubernetes.io/arch
operator: In
values:
- s390x
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:s390x
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: registry.cn-zhangjiakou.aliyuncs.com/test-lab/coreos-flannel:s390x
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
# 使用配置文件启动fannel
kubectl apply -f kube-flannel.yml（1） 查看集群节点
kubectl get nodes
（2）查看全部的pod单元
kubectl get pod --all-namespaces -o wide本作品采用《CC 协议》，转载必须注明作者和本文链接
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