master 节点创建 kube-flannel.yml 配置文件
cat kube-flannel.yml
apiVersion: v1
kind: Namespace
metadata:
labels:
k8s-app: flannel
pod-security.kubernetes.io/enforce: privileged
name: kube-flannel
---
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: flannel
name: flannel
namespace: kube-flannel
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: flannel
name: flannel
rules:
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- get
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: flannel
name: flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: flannel
namespace: kube-flannel
---
apiVersion: v1
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",
"EnableNFTables": false,
"Backend": {
"Type": "vxlan"
}
}
kind: ConfigMap
metadata:
labels:
app: flannel
k8s-app: flannel
tier: node
name: kube-flannel-cfg
namespace: kube-flannel
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
labels:
app: flannel
k8s-app: flannel
tier: node
name: kube-flannel-ds
namespace: kube-flannel
spec:
selector:
matchLabels:
app: flannel
k8s-app: flannel
template:
metadata:
labels:
app: flannel
k8s-app: flannel
tier: node
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
containers:
- args:
- --ip-masq
- --kube-subnet-mgr
command:
- /opt/bin/flanneld
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
- name: EVENT_QUEUE_DEPTH
value: "5000"
- name: KUBERNETES_SERVICE_HOST
value: "10.0.30.47" # 改为实际的 API Server IP
- name: KUBERNETES_SERVICE_PORT
value: "6443" # 改为实际的 API Server 端口
image: docker.io/flannel/flannel:v0.25.7
name: kube-flannel
resources:
requests:
cpu: 100m
memory: 50Mi
securityContext:
capabilities:
add:
- NET_ADMIN
- NET_RAW
privileged: false
volumeMounts:
- mountPath: /run/flannel
name: run
- mountPath: /etc/kube-flannel/
name: flannel-cfg
- mountPath: /run/xtables.lock
name: xtables-lock
hostNetwork: true
initContainers:
- args:
- -f
- /flannel
- /opt/cni/bin/flannel
command:
- cp
image: docker.io/flannel/flannel-cni-plugin:v1.5.1-flannel2
name: install-cni-plugin
volumeMounts:
- mountPath: /opt/cni/bin
name: cni-plugin
- args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
command:
- cp
image: docker.io/flannel/flannel:v0.25.7
name: install-cni
volumeMounts:
- mountPath: /etc/cni/net.d
name: cni
- mountPath: /etc/kube-flannel/
name: flannel-cfg
priorityClassName: system-node-critical
serviceAccountName: flannel
tolerations:
- effect: NoSchedule
operator: Exists
volumes:
- hostPath:
path: /run/flannel
name: run
- hostPath:
path: /opt/cni/bin
name: cni-plugin
- hostPath:
path: /etc/cni/net.d
name: cni
- configMap:
name: kube-flannel-cfg
name: flannel-cfg
- hostPath:
path: /run/xtables.lock
type: FileOrCreate
name: xtables-lock
network 要和 kube-controller-manager cidr 配置一致
添加节点主机名解析
node 节点
cat /etc/hosts
#
127.0.1.1 localhost.localdomain VM-30-31-ubuntu
127.0.0.1 localhost
127.0.0.1 srv-k8s-node-02
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
master 节点
cat /etc/hosts
#
127.0.1.1 localhost.localdomain VM-30-47-ubuntu
127.0.0.1 localhost
127.0.0.1 srv-k8s-plane
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
10.0.30.26 srv-k8s-node-01
10.0.30.31 srv-k8s-node-02
部署 flannel
kubectl apply -f kube-flannel.yml
下载 CNI 插件
下载地址：github.com/containerne…
解压后复制所有插件二进制文件到 /opt/cni/bin/
ls -l /opt/cni/bin/
total 92428
-rwxr-xr-x 1 root root 4648054 Oct 15 17:36 bandwidth
-rwxr-xr-x 1 root root 5283567 Oct 15 17:37 bridge
-rwxr-xr-x 1 root root 12771199 Oct 15 17:37 dhcp
-rwxr-xr-x 1 root root 4843811 Oct 15 17:37 dummy
-rwxr-xr-x 1 root root 5312426 Oct 15 17:36 firewall
-rwxr-xr-x 1 root root 2834432 Oct 27 22:36 flannel
-rwxr-xr-x 1 root root 4784447 Oct 15 17:37 host-device
-rwxr-xr-x 1 root root 4047543 Oct 15 17:37 host-local
-rwxr-xr-x 1 root root 4860660 Oct 15 17:37 ipvlan
-rw-r--r-- 1 root root 11357 Oct 15 17:37 LICENSE
-rwxr-xr-x 1 root root 4107060 Oct 15 17:37 loopback
-rwxr-xr-x 1 root root 4896553 Oct 15 17:37 macvlan
-rwxr-xr-x 1 root root 4703145 Oct 15 17:36 portmap
-rwxr-xr-x 1 root root 5068216 Oct 15 17:37 ptp
-rw-r--r-- 1 root root 2343 Oct 15 17:37 README.md
-rwxr-xr-x 1 root root 4330463 Oct 15 17:36 sbr
-rwxr-xr-x 1 root root 3648356 Oct 15 17:37 static
-rwxr-xr-x 1 root root 4920887 Oct 15 17:37 tap
-rwxr-xr-x 1 root root 4195353 Oct 15 17:36 tuning
-rwxr-xr-x 1 root root 4854297 Oct 15 17:37 vlan
-rwxr-xr-x 1 root root 4481459 Oct 15 17:36 vrf
重启其他依赖的服务
重启 docker、cri-docker、kubelet
检查 k8s 集群节点状态
kubectl get nodes
NAME STATUS ROLES AGE VERSION
srv-k8s-node-01 Ready <none> 11h v1.31.3
