k8s集群-CNI网络插件（Calico 和 Flannel）
1）部署flannel网络(主节点服务器)
在主节点服务器上查看子节点状态为NotReady
[root@k8s-master01-15 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01-15 NotReady master 20m v1.20.11
k8s-node01-16 NotReady 19m v1.20.11
k8s-node02-17 NotReady 19m v1.20.11
检查方法
执行命令kubectl get nodes 查询状态没有启动
查看日志journalctl -u kubelet
Unable to update cni config: no networks found in /etc/cni/net.d
出现这种报错的 是没有安装网络插件，可以往下部署flannel网络。或者等待一会状态会改为Ready
# 在master机器上执行
# 1、创建整理安装所需的文件夹
mkdir -p /data/script/kubernetes/install-k8s/core/ && cd /data/script/kubernetes/
# 2、将主要的文件放入文件夹中
mv /data/script/kubeadm-init.log /data/script/kubeadm-config.yaml /data/script/kubernetes/install-k8s/core/
# 3、创建flannel文件夹
cd /data/script/kubernetes/install-k8s/ && mkdir -p /data/kubernetes/install-k8s/plugin/flannel/ && cd /data/kubernetes/install-k8s/plugin/flannel/
下载kube-flannel.yml文件
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
# 下载命令的打印结果
--2021-07-01 18:10:44-- https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 151.101.108.133
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|151.101.108.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 14366 (14K) [text/plain]
Saving to: ‘kube-flannel.yml’
kube-flannel.yml 100%[================================================>] 14.03K --.-KB/s in 0.05s
2021-07-01 18:15:00 (286 KB/s) - ‘kube-flannel.yml’ saved [14366/14366]
执行安装flannel网络插件
# 先拉取镜像，此过程国内速度比较慢
docker pull quay.io/coreos/flannel:v0.14.0
编辑 kube-flannel.yml 网卡的配置 (master机器)
vim 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', 'NET_RAW']
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/v1
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/v1
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
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
hostNetwork: true
priorityClassName: system-node-critical
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.14.0
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: quay.io/coreos/flannel:v0.14.0
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
- --iface=eth0 # 如机器有多个网卡的话，指定内网网卡的名称，默认不指定的话会找第一块网卡
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN", "NET_RAW"]
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
# 创建flannel
kubectl create -f kube-flannel.yml
# 创建命令的打印结果
podsecuritypolicy.policy/psp.flannel.unprivileged created
clusterrole.rbac.authorization.k8s.io/flannel created
clusterrolebinding.rbac.authorization.k8s.io/flannel created
serviceaccount/flannel created
configmap/kube-flannel-cfg created
daemonset.apps/kube-flannel-ds-amd64 created
daemonset.apps/kube-flannel-ds-arm64 created
daemonset.apps/kube-flannel-ds-arm created
daemonset.apps/kube-flannel-ds-ppc64le created
daemonset.apps/kube-flannel-ds-s390x created
# 查看pod, 可以看到flannel组件已经运行起来了. 默认系统组件都安装在 kube-system 这个命名空间(namespace)下
[root@k8s-master01-15 flannel]# kubectl get pod -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-66bff467f8-tlqdw 1/1 Running 0 18m
coredns-66bff467f8-zpg4q 1/1 Running 0 18m
etcd-k8s-master01-15 1/1 Running 0 18m
kube-apiserver-k8s-master01-15 1/1 Running 0 18m
kube-controller-manager-k8s-master01-15 1/1 Running 0 18m
kube-flannel-ds-6lbmw 1/1 Running 15 (5m30s ago) 59m
kube-flannel-ds-97mkh 0/1 CrashLoopBackOff 14 (4m58s ago) 59m
kube-flannel-ds-fthvm 0/1 Running 15 (5m26s ago) 59m
kube-proxy-4jj7b 0/1 CrashLoopBackOff 0 4m9s
kube-proxy-ksltf 0/1 CrashLoopBackOff 0 4m9s
kube-proxy-w8dcr 0/1 CrashLoopBackOff 0 4m9s
kube-scheduler-k8s-master01-15 1/1 Running 0 18m
# 再次查看node, 发现状态已经变成了 Ready
[root@k8s-master01-15 flannel]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01-15 Ready master 19m v1.20.11
这个如何卸载 flannel.yml （delete ）
[root@k8s-master01-15 flannel]# kubectl delete -f kube-flannel.yml
Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
podsecuritypolicy.policy "psp.flannel.unprivileged" deleted
clusterrole.rbac.authorization.k8s.io "flannel" deleted
clusterrolebinding.rbac.authorization.k8s.io "flannel" deleted
serviceaccount "flannel" deleted
configmap "kube-flannel-cfg" deleted
daemonset.apps "kube-flannel-ds" deleted
2）部署Calico网络插件
Calico遇到的哪些问题，并如何处理呢？
https://www.jianshu.com/p/8b4c3ac2db6f
从Calico官网下载资源文件：
cat calico-etcd.yaml
---
# Source: calico/templates/calico-etcd-secrets.yaml
# The following contains k8s Secrets for use with a TLS enabled etcd cluster.
# For information on populating Secrets, see http://kubernetes.io/docs/user-guide/secrets/
apiVersion: v1
kind: Secret
type: Opaque
metadata:
name: calico-etcd-secrets
namespace: kube-system
data:
# Populate the following with etcd TLS configuration if desired, but leave blank if
# not using TLS for etcd.
# The keys below should be uncommented and the values populated with the base64
# encoded contents of each file that would be associated with the TLS data.
# Example command for encoding a file contents: cat | base64 -w 0
# etcd-key: null
# etcd-cert: null
# etcd-ca: null
---
# Source: calico/templates/calico-config.yaml
# This ConfigMap is used to configure a self-hosted Calico installation.
kind: ConfigMap
apiVersion: v1
metadata:
name: calico-config
namespace: kube-system
data:
# Configure this with the location of your etcd cluster.
etcd_endpoints: "http://:"
# If you're using TLS enabled etcd uncomment the following.
# You must also populate the Secret below with these files.
etcd_ca: "" # "/calico-secrets/etcd-ca"
etcd_cert: "" # "/calico-secrets/etcd-cert"
etcd_key: "" # "/calico-secrets/etcd-key"
# Typha is disabled.
typha_service_name: "none"
# Configure the backend to use.
calico_backend: "bird"
# Configure the MTU to use for workload interfaces and tunnels.
# - If Wireguard is enabled, set to your network MTU - 60
# - Otherwise, if VXLAN or BPF mode is enabled, set to your network MTU - 50
# - Otherwise, if IPIP is enabled, set to your network MTU - 20
# - Otherwise, if not using any encapsulation, set to your network MTU.
veth_mtu: "1440"
# The CNI network configuration to install on each node. The special
# values in this config will be automatically populated.
cni_network_config: |-
{
"name": "k8s-pod-network",
"cniVersion": "0.3.1",
"plugins": [
{
"type": "calico",
"log_level": "info",
"etcd_endpoints": "__ETCD_ENDPOINTS__",
"etcd_key_file": "__ETCD_KEY_FILE__",
"etcd_cert_file": "__ETCD_CERT_FILE__",
"etcd_ca_cert_file": "__ETCD_CA_CERT_FILE__",
"mtu": __CNI_MTU__,
"ipam": {
"type": "calico-ipam"
},
"policy": {
"type": "k8s"
},
"kubernetes": {
"kubeconfig": "__KUBECONFIG_FILEPATH__"
}
},
{
"type": "portmap",
"snat": true,
"capabilities": {"portMappings": true}
},
{
"type": "bandwidth",
"capabilities": {"bandwidth": true}
}
]
}
---
# Source: calico/templates/calico-kube-controllers-rbac.yaml
# Include a clusterrole for the kube-controllers component,
# and bind it to the calico-kube-controllers serviceaccount.
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: calico-kube-controllers
rules:
# Pods are monitored for changing labels.
# The node controller monitors Kubernetes nodes.
# Namespace and serviceaccount labels are used for policy.
- apiGroups: [""]
resources:
- pods
- nodes
- namespaces
- serviceaccounts
verbs:
- watch
- list
- get
# Watch for changes to Kubernetes NetworkPolicies.
- apiGroups: ["networking.k8s.io"]
resources:
- networkpolicies
verbs:
- watch
- list
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: calico-kube-controllers
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: calico-kube-controllers
subjects:
- kind: ServiceAccount
name: calico-kube-controllers
namespace: kube-system
---
---
# Source: calico/templates/calico-node-rbac.yaml
# Include a clusterrole for the calico-node DaemonSet,
# and bind it to the calico-node serviceaccount.
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: calico-node
rules:
# The CNI plugin needs to get pods, nodes, and namespaces.
- apiGroups: [""]
resources:
- pods
- nodes
- namespaces
verbs:
- get
- apiGroups: [""]
resources:
- endpoints
- services
verbs:
# Used to discover service IPs for advertisement.
- watch
- list
# Pod CIDR auto-detection on kubeadm needs access to config maps.
- apiGroups: [""]
resources:
- configmaps
verbs:
- get
- apiGroups: [""]
resources:
- nodes/status
verbs:
# Needed for clearing NodeNetworkUnavailable flag.
- patch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: calico-node
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: calico-node
subjects:
- kind: ServiceAccount
name: calico-node
namespace: kube-system
---
# Source: calico/templates/calico-node.yaml
# This manifest installs the calico-node container, as well
# as the CNI plugins and network config on
# each master and worker node in a Kubernetes cluster.
kind: DaemonSet
apiVersion: apps/v1
metadata:
name: calico-node
namespace: kube-system
labels:
k8s-app: calico-node
spec:
selector:
matchLabels:
k8s-app: calico-node
updateStrategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
template:
metadata:
labels:
k8s-app: calico-node
spec:
nodeSelector:
kubernetes.io/os: linux
hostNetwork: true
tolerations:
# Make sure calico-node gets scheduled on all nodes.
- effect: NoSchedule
operator: Exists
# Mark the pod as a critical add-on for rescheduling.
- key: CriticalAddonsOnly
operator: Exists
- effect: NoExecute
operator: Exists
serviceAccountName: calico-node
# Minimize downtime during a rolling upgrade or deletion; tell Kubernetes to do a "force
# deletion": https://kubernetes.io/docs/concepts/workloads/pods/pod/#termination-of-pods.
terminationGracePeriodSeconds: 0
priorityClassName: system-node-critical
initContainers:
# This container installs the CNI binaries
# and CNI network config file on each node.
- name: install-cni
image: registry.cn-beijing.aliyuncs.com/dotbalo/cni:v3.15.3
command: ["/install-cni.sh"]
env:
# Name of the CNI config file to create.
- name: CNI_CONF_NAME
value: "10-calico.conflist"
# The CNI network config to install on each node.
- name: CNI_NETWORK_CONFIG
valueFrom:
configMapKeyRef:
name: calico-config
key: cni_network_config
# The location of the etcd cluster.
- name: ETCD_ENDPOINTS
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_endpoints
# CNI MTU Config variable
- name: CNI_MTU
valueFrom:
configMapKeyRef:
name: calico-config
key: veth_mtu
# Prevents the container from sleeping forever.
- name: SLEEP
value: "false"
volumeMounts:
- mountPath: /host/opt/cni/bin
name: cni-bin-dir
- mountPath: /host/etc/cni/net.d
name: cni-net-dir
- mountPath: /calico-secrets
name: etcd-certs
securityContext:
privileged: true
# Adds a Flex Volume Driver that creates a per-pod Unix Domain Socket to allow Dikastes
# to communicate with Felix over the Policy Sync API.
- name: flexvol-driver
image: registry.cn-beijing.aliyuncs.com/dotbalo/pod2daemon-flexvol:v3.15.3
volumeMounts:
- name: flexvol-driver-host
mountPath: /host/driver
securityContext:
privileged: true
containers:
# Runs calico-node container on each Kubernetes node. This
# container programs network policy and routes on each
# host.
- name: calico-node
image: registry.cn-beijing.aliyuncs.com/dotbalo/node:v3.15.3
env:
# The location of the etcd cluster.
- name: ETCD_ENDPOINTS
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_endpoints
# Location of the CA certificate for etcd.
- name: ETCD_CA_CERT_FILE
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_ca
# Location of the client key for etcd.
- name: ETCD_KEY_FILE
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_key
# Location of the client certificate for etcd.
- name: ETCD_CERT_FILE
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_cert
# Set noderef for node controller.
- name: CALICO_K8S_NODE_REF
valueFrom:
fieldRef:
fieldPath: spec.nodeName
# Choose the backend to use.
- name: CALICO_NETWORKING_BACKEND
valueFrom:
configMapKeyRef:
name: calico-config
key: calico_backend
# Cluster type to identify the deployment type
- name: CLUSTER_TYPE
value: "k8s,bgp"
# Auto-detect the BGP IP address.
- name: IP
value: "autodetect"
# Enable IPIP
- name: CALICO_IPV4POOL_IPIP
value: "Always"
# Enable or Disable VXLAN on the default IP pool.
- name: CALICO_IPV4POOL_VXLAN
value: "Never"
# Set MTU for tunnel device used if ipip is enabled
- name: FELIX_IPINIPMTU
valueFrom:
configMapKeyRef:
name: calico-config
key: veth_mtu
# Set MTU for the VXLAN tunnel device.
- name: FELIX_VXLANMTU
valueFrom:
configMapKeyRef:
name: calico-config
key: veth_mtu
# Set MTU for the Wireguard tunnel device.
- name: FELIX_WIREGUARDMTU
valueFrom:
configMapKeyRef:
name: calico-config
key: veth_mtu
# The default IPv4 pool to create on startup if none exists. Pod IPs will be
# chosen from this range. Changing this value after installation will have
# no effect. This should fall within `--cluster-cidr`.
# - name: CALICO_IPV4POOL_CIDR
# value: "192.168.0.0/16"
# Disable file logging so `kubectl logs` works.
- name: CALICO_DISABLE_FILE_LOGGING
value: "true"
# Set Felix endpoint to host default action to ACCEPT.
- name: FELIX_DEFAULTENDPOINTTOHOSTACTION
value: "ACCEPT"
# Disable IPv6 on Kubernetes.
- name: FELIX_IPV6SUPPORT
value: "false"
# Set Felix logging to "info"
- name: FELIX_LOGSEVERITYSCREEN
value: "info"
- name: FELIX_HEALTHENABLED
value: "true"
securityContext:
privileged: true
resources:
requests:
cpu: 250m
livenessProbe:
exec:
command:
- /bin/calico-node
- -felix-live
- -bird-live
periodSeconds: 10
initialDelaySeconds: 10
failureThreshold: 6
readinessProbe:
exec:
command:
- /bin/calico-node
- -felix-ready
- -bird-ready
periodSeconds: 10
volumeMounts:
- mountPath: /lib/modules
name: lib-modules
readOnly: true
- mountPath: /run/xtables.lock
name: xtables-lock
readOnly: false
- mountPath: /var/run/calico
name: var-run-calico
readOnly: false
- mountPath: /var/lib/calico
name: var-lib-calico
readOnly: false
- mountPath: /calico-secrets
name: etcd-certs
- name: policysync
mountPath: /var/run/nodeagent
volumes:
# Used by calico-node.
- name: lib-modules
hostPath:
path: /lib/modules
- name: var-run-calico
hostPath:
path: /var/run/calico
- name: var-lib-calico
hostPath:
path: /var/lib/calico
- name: xtables-lock
hostPath:
path: /run/xtables.lock
type: FileOrCreate
# Used to install CNI.
- name: cni-bin-dir
hostPath:
path: /opt/cni/bin
- name: cni-net-dir
hostPath:
path: /etc/cni/net.d
# Mount in the etcd TLS secrets with mode 400.
# See https://kubernetes.io/docs/concepts/configuration/secret/
- name: etcd-certs
secret:
secretName: calico-etcd-secrets
defaultMode: 0400
# Used to create per-pod Unix Domain Sockets
- name: policysync
hostPath:
type: DirectoryOrCreate
path: /var/run/nodeagent
# Used to install Flex Volume Driver
- name: flexvol-driver-host
hostPath:
type: DirectoryOrCreate
path: /usr/libexec/kubernetes/kubelet-plugins/volume/exec/nodeagent~uds
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: calico-node
namespace: kube-system
---
# Source: calico/templates/calico-kube-controllers.yaml
# See https://github.com/projectcalico/kube-controllers
apiVersion: apps/v1
kind: Deployment
metadata:
name: calico-kube-controllers
namespace: kube-system
labels:
k8s-app: calico-kube-controllers
spec:
# The controllers can only have a single active instance.
replicas: 1
selector:
matchLabels:
k8s-app: calico-kube-controllers
strategy:
type: Recreate
template:
metadata:
name: calico-kube-controllers
namespace: kube-system
labels:
k8s-app: calico-kube-controllers
spec:
nodeSelector:
kubernetes.io/os: linux
tolerations:
# Mark the pod as a critical add-on for rescheduling.
- key: CriticalAddonsOnly
operator: Exists
- key: node-role.kubernetes.io/master
effect: NoSchedule
serviceAccountName: calico-kube-controllers
priorityClassName: system-cluster-critical
# The controllers must run in the host network namespace so that
# it isn't governed by policy that would prevent it from working.
hostNetwork: true
containers:
- name: calico-kube-controllers
image: registry.cn-beijing.aliyuncs.com/dotbalo/kube-controllers:v3.15.3
env:
# The location of the etcd cluster.
- name: ETCD_ENDPOINTS
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_endpoints
# Location of the CA certificate for etcd.
- name: ETCD_CA_CERT_FILE
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_ca
# Location of the client key for etcd.
- name: ETCD_KEY_FILE
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_key
# Location of the client certificate for etcd.
- name: ETCD_CERT_FILE
valueFrom:
configMapKeyRef:
name: calico-config
key: etcd_cert
# Choose which controllers to run.
- name: ENABLED_CONTROLLERS
value: policy,namespace,serviceaccount,workloadendpoint,node
volumeMounts:
# Mount in the etcd TLS secrets.
- mountPath: /calico-secrets
name: etcd-certs
readinessProbe:
exec:
command:
- /usr/bin/check-status
- -r
volumes:
# Mount in the etcd TLS secrets with mode 400.
# See https://kubernetes.io/docs/concepts/configuration/secret/
- name: etcd-certs
secret:
secretName: calico-etcd-secrets
defaultMode: 0400
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: calico-kube-controllers
namespace: kube-system
---
# Source: calico/templates/calico-typha.yaml
---
# Source: calico/templates/configure-canal.yaml
---
# Source: calico/templates/kdd-crds.yaml
下面只列出修改的部分：
$ vim calico-etcd.yaml
...
# 这里反引号包裹的内容表示需要执行它将其结果替换到此处
# kubeadm目录路径：/opt/etcd/ssl/{server-key.pem,ca.pem,server-key.pem}
# 二进制目录路径：/opt/k8s_tls/etcd/{server-key.pem,server.pem,ca.pem}
# etcd 证书私钥
etcd-key: # 需要执行 cat /root/TLS/etcd/server-key.pem | base64 -w 0 的命令
# etcd 证书
etcd-cert: # 需要执行 cat /root/TLS/etcd/server.pem | base64 -w 0 的命令
# etcd CA 证书
etcd-ca: # 需要执行 cat /root/TLS/etcd/ca.pem | base64 -w 0 的命令
...
# 需要-部署外置的ETCD的集群：https://www.jianshu.com/p/fbec19c20454
# ETCD集群的地址
etcd_endpoints: "https://172.23.199.15:2379,https://172.23.199.16:2379,https://172.23.199.17:2379"
etcd_ca: "/calico-secrets/etcd-ca"
etcd_cert: "/calico-secrets/etcd-cert"
etcd_key: "/calico-secrets/etcd-key"
...
- name: CLUSTER_TYPE
value: "k8s,bgp"
# 新增部分
- name: IP_AUTODETECTION_METHOD
value: "interface=eth0"
# value: "interface=eth.*"
# value: "interface=can-reach=www.baidu.com"
# 新增部分结束
- name: IP
value: "autodetect"
# 禁止使用 IPIP 模式
- name: CALICO_IPV4POOL_IPIP
value: "Never"
# 设置 Pod IP 地址段，此处 value 应该与之前配置的 kubeadm-config.yaml 或 二进制hosts.yaml 中的 kuadm的 podSubnet 或 二进制的pod_net 变量值一致
- name: CALICO_IPV4POOL_CIDR
value: "10.244.0.0/16"
...
# 修改 cni 插件二进制文件映射到宿主机的目录，此处 /opt/apps 与 hosts.yaml 中的 install_dir 变量值一致
- name: cni-bin-dir
hostPath:
path: /opt/cni/bin #/opt/apps/cni/bin
# 修改 cni 配置目录为手动指定的目录，此处 /opt/apps 与 hosts.yaml 中的 install_dir 变量值一致
- name: cni-net-dir
hostPath:
path: /etc/cni/net.d #/opt/apps/cni/conf
# 修改 cni 日志目录为手动指定的目录，此处 /opt/apps 与 hosts.yaml 中的 install_dir 变量值一致
- name: cni-log-dir
hostPath:
path: /var/log/calico/cni #/opt/apps/cni/log
# 修改此卷的挂载权限为 0440，有两处
- name: etcd-certs
secret:
secretName: calico-etcd-secrets
defaultMode: 0440
应用修改好的资源文件：
kubectl apply -f calico-etcd.yaml
secret/calico-etcd-secrets created
configmap/calico-config created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.apps/calico-node created
serviceaccount/calico-node created
deployment.apps/calico-kube-controllers created
serviceaccount/calico-kube-controllers created
poddisruptionbudget.policy/calico-kube-controllers created
它会在 kube-system 命名空间下启动如下 Pod：
[root@k8s-master kubeadm]# kubectl get pod -n kube-system
NAME READY STATUS RESTARTS AGE
calico-kube-controllers-9d65bcc55-k2d8j 1/1 Running 0 18h
calico-node-7jbk2 1/1 Running 0 18h
calico-node-ffbwh 1/1 Running 0 18h
calico-node-rl4dw 1/1 Running 0 18h
部署Calicoctl 插件的流程并使用
1）环境信息
k8s集群为1.20.11版本，calico版本为3.20.0版本
2）下载calicoctl二进制文件
wget https://github.com/projectcalico/calicoctl/releases/download/v3.20.0/calicoctl
cp calicoctl /usr/bin
chmod +x /usr/bin/calicoctl
3）命令行测试
[root@k8s-master-15 ~]# DATASTORE_TYPE=kubernetes KUBECONFIG=~/.kube/config calicoctl node status
Calico process is running.
IPv4 BGP status
+--------------+-------------------+-------+------------+-------------+
| PEER ADDRESS | PEER TYPE | STATE | SINCE | INFO |
+--------------+-------------------+-------+------------+-------------+
| 172.23.199.16| node-to-node mesh | up | 20xx-xx-xx | Established |
| 172.23.199.17| node-to-node mesh | up | 20xx-xx-xx | Established |
+--------------+-------------------+-------+------------+-------------+
4）配置文件测试
#1、编辑配置文件
[root@k8s-master-15 ~]# mkdir -p /etc/calico/
[root@k8s-master-15 ~]# vim /etc/calico/calicoctl.cfg
apiVersion: projectcalico.org/v3
kind: CalicoAPIConfig
metadata:
spec:
datastoreType: "kubernetes"
kubeconfig: "~/.kube/config"
#2、测试命令如下
[root@k8s-master-15 ~]# calicoctl node status
Calico process is running.
IPv4 BGP status
+--------------+-------------------+-------+------------+-------------+
| PEER ADDRESS | PEER TYPE | STATE | SINCE | INFO |
+--------------+-------------------+-------+------------+-------------+
| 172.23.199.16| node-to-node mesh | up | 20xx-xx-xx | Established |
| 172.23.199.17| node-to-node mesh | up | 20xx-xx-xx | Established |
+--------------+-------------------+-------+------------+-------------+
说明：node-node mesh: 代表所有节点用full mesh的bgp连接
[root@k8s-master ~]# netstat -anp | grep ESTABLISH | grep bird
tcp 0 0 172.23.199.16:179 172.23.199.16:46090 ESTABLISHED 8918/bird
tcp 0 0 172.23.199.17:170 172.23.199.17:49770 ESTABLISHED 8918/bird
我部署的calico由于集群规模不是很大，使用的是calico的bgp模式的node-to-node-mesh全节点互联，这种模式在小规模集群里面还可以用。在3.4.0版本的calico是可以支持到100多个节点。
