Kubernetes
Kubeadm方式搭建K8S集群
本文主要是介绍Kubeadm方式搭建K8S集群，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
Kubeadm方式搭建集群优缺点：
优点： 简单优雅，支持高可用，升级方便 缺点： 不易维护，文档不够细致
将master作为deploy节点，未指定节点时默认在master上进行操作。
建议deploy节点与其它节点配置ssh免密登录，配置过程参考：批量实现SSH免密登录 。
环境准备
环境准备工作请在所有节点进行。
- 主机说明：
| 系统 | ip | 角色 | cpu | 内存 | hostname |
|---|---|---|---|---|---|
| CentOS 7.8 | 192.168.30.128 | master、deploy | >=2 | >=2G | master |
| CentOS 7.8 | 192.168.30.129 | node | >=2 | >=2G | node1 |
| CentOS 7.8 | 192.168.30.130 | node | >=2 | >=2G | node2 |
| CentOS 7.8 | 192.168.30.131 | node | >=2 | >=2G | node3 |
- 设置主机名：
以master为例，
hostnamectl set-hostname master
- 安装依赖包：
yum update -y yum install -y curl git iptables conntrack ipvsadm ipset jq sysstat libseccomp
- 关闭防火墙、selinux和swap，重置iptables：
systemctl stop firewalld && systemctl disable firewalldsed -i 's/=enforcing/=disabled/g' /etc/selinux/config && setenforce 0 iptables -F && iptables -X && iptables -F -t nat && iptables -X -t nat && iptables -P FORWARD ACCEPT swapoff -ased -i '/swap/s/^\(.*\)$/#\1/g' /etc/fstab
- 系统参数设置：
cat > /etc/sysctl.d/kubernetes.conf <<EOF net.bridge.bridge-nf-call-iptables=1 net.bridge.bridge-nf-call-ip6tables=1 net.ipv4.ip_forward=1 vm.swappiness=0 vm.overcommit_memory=1 vm.panic_on_oom=0 fs.inotify.max_user_watches=89100 EOFmodprobe br_netfilter sysctl -p /etc/sysctl.d/kubernetes.conf
- 安装docker：
curl http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker.repo
yum makecache fast
yum install -y docker-ce
systemctl enable docker && systemctl start dockercat > /etc/docker/daemon.json <<EOF
{
"registry-mirrors": ["http://f1361db2.m.daocloud.io"],
"exec-opts":["native.cgroupdriver=systemd"]
}
EOFsystemctl restart docker- 安装必要工具：
kubeadm 用于部署集群 bukelet 集群中各节点需要运行的组件，负责管理pod、容器的生命周期 kubectl 集群管理工具（master节点安装即可）
cat > /etc/yum.repos.d/kubernetes.repo <<EOF [kubernetes] name=Kubernetes baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=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 EOFyum install -y kubeadm-1.18.3 kubelet-1.18.3 kubectl-1.18.3 --disableexcludes=kubernetes systemctl enable kubelet && systemctl start kubelet
集群初始化
- 集群初始化：
mkdir /software vim /software/kubeadm-config.yaml
apiVersion: kubeadm.k8s.io/v1beta2kind: ClusterConfigurationkubernetesVersion: v1.18.3controlPlaneEndpoint: 192.168.30.128:6443networking: podSubnet: 172.10.0.0/16imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
kubeadm config images pull --kubernetes-version=v1.18.3 --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers kubeadm init --config=/software/kubeadm-config.yaml --upload-certs
初始化这一步如果报错：
error execution phase upload-config/kubelet: Error writing Crisocket information for the control-plane node: timed out waiting for the condition
解决：
swapoff -a kubeadm reset -f systemctl daemon-reload systemctl restart kubelet iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X
mkdir ~/.kube \cp /etc/kubernetes/admin.conf ~/.kube/config kubectl get pods -n kube-system NAME READY STATUS RESTARTS AGE coredns-546565776c-srxkq 0/1 Pending 0 60s coredns-546565776c-w9fbs 0/1 Pending 0 60s etcd-master 1/1 Running 0 75s kube-apiserver-master 1/1 Running 0 75s kube-controller-manager-master 1/1 Running 0 75s kube-proxy-qb7d5 1/1 Running 0 60s kube-scheduler-master 1/1 Running 0 75s
kubectl completion bash > ~/.kube/completion.bash.inc echo 'source ~/.kube/completion.bash.inc' >> ~/.bash_profilesource ~/.bash_profile
注意备份上面初始化之后打印的join命令，这里分别是以master、node节点加入集群。
kubeadm join 192.168.30.128:6443 --token 1ndel7.xb623vep9pl5o6vl \ --discovery-token-ca-cert-hash sha256:0e41f6020955c36970bf504cbfc0047941240dda57ebb9d85086706da14dcd1f \ --control-plane --certificate-key 6518fe9f3eca5cb4a5860170d18c03109f54c94fba8ca7e5408a9aab5e598663 kubeadm join 192.168.30.128:6443 --token 1ndel7.xb623vep9pl5o6vl \ --discovery-token-ca-cert-hash sha256:0e41f6020955c36970bf504cbfc0047941240dda57ebb9d85086706da14dcd1f
部署calico
- 部署calico：
mkdir /etc/kubernetes/addons vim /etc/kubernetes/addons/calico-rbac.yaml
apiVersion: v1kind: ServiceAccountmetadata: name: calico-kube-controllers namespace: kube-system ---kind: ClusterRoleapiVersion: rbac.authorization.k8s.io/v1metadata: name: calico-kube-controllersrules: - apiGroups: [""] resources: - nodes verbs: - watch - list - get - apiGroups: [""] resources: - pods verbs: - get - apiGroups: ["crd.projectcalico.org"] resources: - ippools verbs: - list - apiGroups: ["crd.projectcalico.org"] resources: - blockaffinities - ipamblocks - ipamhandles verbs: - get - list - create - update - delete - apiGroups: ["crd.projectcalico.org"] resources: - hostendpoints verbs: - get - list - create - update - delete - apiGroups: ["crd.projectcalico.org"] resources: - clusterinformations verbs: - get - create - update - apiGroups: ["crd.projectcalico.org"] resources: - kubecontrollersconfigurations verbs: - get - create - update - watch ---kind: ClusterRoleBindingapiVersion: rbac.authorization.k8s.io/v1metadata: name: calico-kube-controllersroleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: calico-kube-controllerssubjects:- kind: ServiceAccount name: calico-kube-controllers namespace: kube-system---apiVersion: v1kind: ServiceAccountmetadata: name: calico-node namespace: kube-system---kind: ClusterRoleapiVersion: rbac.authorization.k8s.io/v1metadata: name: calico-noderules: - apiGroups: [""] resources: - pods - nodes - namespaces verbs: - get - apiGroups: [""] resources: - endpoints - services verbs: - watch - list - get - apiGroups: [""] resources: - configmaps verbs: - get - apiGroups: [""] resources: - nodes/status verbs: - patch - update - apiGroups: ["networking.k8s.io"] resources: - networkpolicies verbs: - watch - list - apiGroups: [""] resources: - pods - namespaces - serviceaccounts verbs: - list - watch - apiGroups: [""] resources: - pods/status verbs: - patch - apiGroups: ["crd.projectcalico.org"] resources: - globalfelixconfigs - felixconfigurations - bgppeers - globalbgpconfigs - bgpconfigurations - ippools - ipamblocks - globalnetworkpolicies - globalnetworksets - networkpolicies - networksets - clusterinformations - hostendpoints - blockaffinities verbs: - get - list - watch - apiGroups: ["crd.projectcalico.org"] resources: - ippools - felixconfigurations - clusterinformations verbs: - create - update - apiGroups: [""] resources: - nodes verbs: - get - list - watch - apiGroups: ["crd.projectcalico.org"] resources: - bgpconfigurations - bgppeers verbs: - create - update - apiGroups: ["crd.projectcalico.org"] resources: - blockaffinities - ipamblocks - ipamhandles verbs: - get - list - create - update - delete - apiGroups: ["crd.projectcalico.org"] resources: - ipamconfigs verbs: - get - apiGroups: ["crd.projectcalico.org"] resources: - blockaffinities verbs: - watch - apiGroups: ["apps"] resources: - daemonsets verbs: - get---apiVersion: rbac.authorization.k8s.io/v1kind: ClusterRoleBindingmetadata: name: calico-noderoleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: calico-nodesubjects:- kind: ServiceAccount name: calico-node namespace: kube-system
vim /etc/kubernetes/addons/calico.yaml
apiVersion: v1kind: ConfigMapmetadata:
name: calico-config namespace: kube-systemdata:
typha_service_name: "none"
calico_backend: "bird"
veth_mtu: "1440"
cni_network_config: |-
{
"name": "k8s-pod-network",
"cniVersion": "0.3.1",
"plugins": [
{
"type": "calico",
"log_level": "info",
"datastore_type": "kubernetes",
"nodename": "__KUBERNETES_NODE_NAME__",
"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}
}
]
}
---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: bgpconfigurations.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: BGPConfiguration listKind: BGPConfigurationList plural: bgpconfigurations singular: bgpconfiguration scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
asNumber:
format: int32 type: integer logSeverityScreen:
type: string nodeToNodeMeshEnabled:
type: boolean serviceClusterIPs:
items:
properties:
cidr:
type: string type: object type: array serviceExternalIPs:
items:
properties:
cidr:
type: string type: object type: array type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: bgppeers.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: BGPPeer listKind: BGPPeerList plural: bgppeers singular: bgppeer scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
asNumber:
format: int32 type: integer node:
type: string nodeSelector:
type: string peerIP:
type: string peerSelector:
type: string required:
- asNumber - peerIP type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: blockaffinities.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: BlockAffinity listKind: BlockAffinityList plural: blockaffinities singular: blockaffinity scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
cidr:
type: string deleted:
type: string node:
type: string state:
type: string required:
- cidr - deleted - node - state type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: clusterinformations.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: ClusterInformation listKind: ClusterInformationList plural: clusterinformations singular: clusterinformation scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
calicoVersion:
type: string clusterGUID:
type: string clusterType:
type: string datastoreReady:
type: boolean variant:
type: string type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: felixconfigurations.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: FelixConfiguration listKind: FelixConfigurationList plural: felixconfigurations singular: felixconfiguration scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
bpfConnectTimeLoadBalancingEnabled:
type: boolean bpfDataIfacePattern:
type: string bpfDisableUnprivileged:
type: boolean bpfEnabled:
type: boolean bpfExternalServiceMode:
type: string bpfKubeProxyEndpointSlicesEnabled:
type: boolean bpfKubeProxyIptablesCleanupEnabled:
type: boolean bpfKubeProxyMinSyncPeriod:
type: string bpfLogLevel:
type: string chainInsertMode:
type: string dataplaneDriver:
type: string debugDisableLogDropping:
type: boolean debugMemoryProfilePath:
type: string debugSimulateCalcGraphHangAfter:
type: string debugSimulateDataplaneHangAfter:
type: string defaultEndpointToHostAction:
type: string deviceRouteProtocol:
type: integer deviceRouteSourceAddress:
type: string disableConntrackInvalidCheck:
type: boolean endpointReportingDelay:
type: string endpointReportingEnabled:
type: boolean externalNodesList:
items:
type: string type: array failsafeInboundHostPorts:
items:
properties:
port:
type: integer protocol:
type: string required:
- port - protocol type: object type: array failsafeOutboundHostPorts:
items:
properties:
port:
type: integer protocol:
type: string required:
- port - protocol type: object type: array genericXDPEnabled:
type: boolean healthEnabled:
type: boolean healthHost:
type: string healthPort:
type: integer interfaceExclude:
type: string interfacePrefix:
type: string ipipEnabled:
type: boolean ipipMTU:
type: integer ipsetsRefreshInterval:
type: string iptablesBackend:
type: string iptablesFilterAllowAction:
type: string iptablesLockFilePath:
type: string iptablesLockProbeInterval:
type: string iptablesLockTimeout:
type: string iptablesMangleAllowAction:
type: string iptablesMarkMask:
format: int32 type: integer iptablesNATOutgoingInterfaceFilter:
type: string iptablesPostWriteCheckInterval:
type: string iptablesRefreshInterval:
type: string ipv6Support:
type: boolean kubeNodePortRanges:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array logFilePath:
type: string logPrefix:
type: string logSeverityFile:
type: string logSeverityScreen:
type: string logSeveritySys:
type: string maxIpsetSize:
type: integer metadataAddr:
type: string metadataPort:
type: integer natOutgoingAddress:
type: string natPortRange:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
netlinkTimeout:
type: string openstackRegion:
type: string policySyncPathPrefix:
type: string prometheusGoMetricsEnabled:
type: boolean prometheusMetricsEnabled:
type: boolean prometheusMetricsHost:
type: string prometheusMetricsPort:
type: integer prometheusProcessMetricsEnabled:
type: boolean removeExternalRoutes:
type: boolean reportingInterval:
type: string reportingTTL:
type: string routeRefreshInterval:
type: string routeSource:
type: string routeTableRange:
properties:
max:
type: integer min:
type: integer required:
- max - min type: object sidecarAccelerationEnabled:
type: boolean usageReportingEnabled:
type: boolean usageReportingInitialDelay:
type: string usageReportingInterval:
type: string useInternalDataplaneDriver:
type: boolean vxlanEnabled:
type: boolean vxlanMTU:
type: integer vxlanPort:
type: integer vxlanVNI:
type: integer wireguardEnabled:
type: boolean wireguardInterfaceName:
type: string wireguardListeningPort:
type: integer wireguardMTU:
type: integer wireguardRoutingRulePriority:
type: integer xdpEnabled:
type: boolean xdpRefreshInterval:
type: string required:
- bpfLogLevel type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: globalnetworkpolicies.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: GlobalNetworkPolicy listKind: GlobalNetworkPolicyList plural: globalnetworkpolicies singular: globalnetworkpolicy scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
applyOnForward:
type: boolean doNotTrack:
type: boolean egress:
items:
properties:
action:
type: string destination:
properties:
namespaceSelector:
type: string nets:
items:
type: string type: array notNets:
items:
type: string type: array notPorts:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array notSelector:
type: string ports:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array selector:
type: string serviceAccounts:
properties:
names:
items:
type: string type: array selector:
type: string type: object type: object http:
properties:
methods:
items:
type: string type: array paths:
items:
properties:
exact:
type: string prefix:
type: string type: object type: array type: object icmp:
properties:
code:
type: integer type:
type: integer type: object ipVersion:
type: integer metadata:
properties:
annotations:
additionalProperties:
type: string type: object type: object notICMP:
properties:
code:
type: integer type:
type: integer type: object notProtocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
protocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
source:
properties:
namespaceSelector:
type: string nets:
items:
type: string type: array notNets:
items:
type: string type: array notPorts:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array notSelector:
type: string ports:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array selector:
type: string serviceAccounts:
properties:
names:
items:
type: string type: array selector:
type: string type: object type: object required:
- action type: object type: array ingress:
items:
properties:
action:
type: string destination:
properties:
namespaceSelector:
type: string nets:
items:
type: string type: array notNets:
items:
type: string type: array notPorts:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array notSelector:
type: string ports:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array selector:
type: string serviceAccounts:
properties:
names:
items:
type: string type: array selector:
type: string type: object type: object http:
properties:
methods:
items:
type: string type: array paths:
items:
properties:
exact:
type: string prefix:
type: string type: object type: array type: object icmp:
properties:
code:
type: integer type:
type: integer type: object ipVersion:
type: integer metadata:
properties:
annotations:
additionalProperties:
type: string type: object type: object notICMP:
properties:
code:
type: integer type:
type: integer type: object notProtocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
protocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
source:
properties:
namespaceSelector:
type: string nets:
items:
type: string type: array notNets:
items:
type: string type: array notPorts:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array notSelector:
type: string ports:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array selector:
type: string serviceAccounts:
properties:
names:
items:
type: string type: array selector:
type: string type: object type: object required:
- action type: object type: array namespaceSelector:
type: string order:
type: number preDNAT:
type: boolean selector:
type: string serviceAccountSelector:
type: string types:
items:
type: string type: array type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: globalnetworksets.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: GlobalNetworkSet listKind: GlobalNetworkSetList plural: globalnetworksets singular: globalnetworkset scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
nets:
items:
type: string type: array type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: hostendpoints.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: HostEndpoint listKind: HostEndpointList plural: hostendpoints singular: hostendpoint scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
expectedIPs:
items:
type: string type: array interfaceName:
type: string node:
type: string ports:
items:
properties:
name:
type: string port:
type: integer protocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
required:
- name - port - protocol type: object type: array profiles:
items:
type: string type: array type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: ipamblocks.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: IPAMBlock listKind: IPAMBlockList plural: ipamblocks singular: ipamblock scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
affinity:
type: string allocations:
items:
type: integer nullable: true
type: array attributes:
items:
properties:
handle_id:
type: string secondary:
additionalProperties:
type: string type: object type: object type: array cidr:
type: string deleted:
type: boolean strictAffinity:
type: boolean unallocated:
items:
type: integer type: array required:
- allocations - attributes - cidr - deleted - strictAffinity - unallocated type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: ipamconfigs.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: IPAMConfig listKind: IPAMConfigList plural: ipamconfigs singular: ipamconfig scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
autoAllocateBlocks:
type: boolean strictAffinity:
type: boolean required:
- autoAllocateBlocks - strictAffinity type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: ipamhandles.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: IPAMHandle listKind: IPAMHandleList plural: ipamhandles singular: ipamhandle scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
block:
additionalProperties:
type: integer type: object handleID:
type: string required:
- block - handleID type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: ippools.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: IPPool listKind: IPPoolList plural: ippools singular: ippool scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
blockSize:
type: integer cidr:
type: string disabled:
type: boolean ipip:
properties:
enabled:
type: boolean mode:
type: string type: object ipipMode:
type: string nat-outgoing:
type: boolean natOutgoing:
type: boolean nodeSelector:
type: string vxlanMode:
type: string required:
- cidr type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: kubecontrollersconfigurations.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: KubeControllersConfiguration listKind: KubeControllersConfigurationList plural: kubecontrollersconfigurations singular: kubecontrollersconfiguration scope: Cluster versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
controllers:
properties:
namespace:
properties:
reconcilerPeriod:
type: string type: object node:
properties:
hostEndpoint:
properties:
autoCreate:
type: string type: object reconcilerPeriod:
type: string syncLabels:
type: string type: object policy:
properties:
reconcilerPeriod:
type: string type: object serviceAccount:
properties:
reconcilerPeriod:
type: string type: object workloadEndpoint:
properties:
reconcilerPeriod:
type: string type: object type: object etcdV3CompactionPeriod:
type: string healthChecks:
type: string logSeverityScreen:
type: string required:
- controllers type: object status:
properties:
environmentVars:
additionalProperties:
type: string type: object runningConfig:
properties:
controllers:
properties:
namespace:
properties:
reconcilerPeriod:
type: string type: object node:
properties:
hostEndpoint:
properties:
autoCreate:
type: string type: object reconcilerPeriod:
type: string syncLabels:
type: string type: object policy:
properties:
reconcilerPeriod:
type: string type: object serviceAccount:
properties:
reconcilerPeriod:
type: string type: object workloadEndpoint:
properties:
reconcilerPeriod:
type: string type: object type: object etcdV3CompactionPeriod:
type: string healthChecks:
type: string logSeverityScreen:
type: string required:
- controllers type: object type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: networkpolicies.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: NetworkPolicy listKind: NetworkPolicyList plural: networkpolicies singular: networkpolicy scope: Namespaced versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
egress:
items:
properties:
action:
type: string destination:
properties:
namespaceSelector:
type: string nets:
items:
type: string type: array notNets:
items:
type: string type: array notPorts:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array notSelector:
type: string ports:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array selector:
type: string serviceAccounts:
properties:
names:
items:
type: string type: array selector:
type: string type: object type: object http:
properties:
methods:
items:
type: string type: array paths:
items:
properties:
exact:
type: string prefix:
type: string type: object type: array type: object icmp:
properties:
code:
type: integer type:
type: integer type: object ipVersion:
type: integer metadata:
properties:
annotations:
additionalProperties:
type: string type: object type: object notICMP:
properties:
code:
type: integer type:
type: integer type: object notProtocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
protocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
source:
properties:
namespaceSelector:
type: string nets:
items:
type: string type: array notNets:
items:
type: string type: array notPorts:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array notSelector:
type: string ports:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array selector:
type: string serviceAccounts:
properties:
names:
items:
type: string type: array selector:
type: string type: object type: object required:
- action type: object type: array ingress:
items:
properties:
action:
type: string destination:
properties:
namespaceSelector:
type: string nets:
items:
type: string type: array notNets:
items:
type: string type: array notPorts:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array notSelector:
type: string ports:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array selector:
type: string serviceAccounts:
properties:
names:
items:
type: string type: array selector:
type: string type: object type: object http:
properties:
methods:
items:
type: string type: array paths:
items:
properties:
exact:
type: string prefix:
type: string type: object type: array type: object icmp:
properties:
code:
type: integer type:
type: integer type: object ipVersion:
type: integer metadata:
properties:
annotations:
additionalProperties:
type: string type: object type: object notICMP:
properties:
code:
type: integer type:
type: integer type: object notProtocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
protocol:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
source:
properties:
namespaceSelector:
type: string nets:
items:
type: string type: array notNets:
items:
type: string type: array notPorts:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array notSelector:
type: string ports:
items:
anyOf:
- type: integer - type: string pattern: ^.* x-kubernetes-int-or-string: true
type: array selector:
type: string serviceAccounts:
properties:
names:
items:
type: string type: array selector:
type: string type: object type: object required:
- action type: object type: array order:
type: number selector:
type: string serviceAccountSelector:
type: string types:
items:
type: string type: array type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []---apiVersion: apiextensions.k8s.io/v1kind: CustomResourceDefinitionmetadata:
name: networksets.crd.projectcalico.orgspec:
group: crd.projectcalico.org names:
kind: NetworkSet listKind: NetworkSetList plural: networksets singular: networkset scope: Namespaced versions:
- name: v1 schema:
openAPIV3Schema:
properties:
apiVersion:
type: string kind:
type: string metadata:
type: object spec:
properties:
nets:
items:
type: string type: array type: object type: object served: true
storage: truestatus:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---kind: DaemonSetapiVersion: apps/v1metadata:
name: calico-node namespace: kube-system labels:
k8s-app: calico-nodespec:
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:
- effect: NoSchedule operator: Exists - key: CriticalAddonsOnly operator: Exists - effect: NoExecute operator: Exists serviceAccountName: calico-node terminationGracePeriodSeconds: 0
priorityClassName: system-node-critical initContainers:
- name: upgrade-ipam image: calico/cni:v3.15.1 command: ["/opt/cni/bin/calico-ipam", "-upgrade"]
env:
- name: KUBERNETES_NODE_NAME valueFrom:
fieldRef:
fieldPath: spec.nodeName - name: CALICO_NETWORKING_BACKEND valueFrom:
configMapKeyRef:
name: calico-config key: calico_backend volumeMounts:
- mountPath: /var/lib/cni/networks name: host-local-net-dir - mountPath: /host/opt/cni/bin name: cni-bin-dir securityContext:
privileged: true
- name: install-cni image: calico/cni:v3.15.1 command: ["/install-cni.sh"]
env:
- name: CNI_CONF_NAME value: "10-calico.conflist"
- name: CNI_NETWORK_CONFIG valueFrom:
configMapKeyRef:
name: calico-config key: cni_network_config - name: KUBERNETES_NODE_NAME valueFrom:
fieldRef:
fieldPath: spec.nodeName - name: CNI_MTU valueFrom:
configMapKeyRef:
name: calico-config key: veth_mtu - name: SLEEP value: "false"
volumeMounts:
- mountPath: /host/opt/cni/bin name: cni-bin-dir - mountPath: /host/etc/cni/net.d name: cni-net-dir securityContext:
privileged: true
- name: flexvol-driver image: calico/pod2daemon-flexvol:v3.15.1 volumeMounts:
- name: flexvol-driver-host mountPath: /host/driver securityContext:
privileged: true
containers:
- name: calico-node image: calico/node:v3.15.1 env:
- name: DATASTORE_TYPE value: "kubernetes"
- name: WAIT_FOR_DATASTORE value: "true"
- name: NODENAME valueFrom:
fieldRef:
fieldPath: spec.nodeName - name: CALICO_NETWORKING_BACKEND valueFrom:
configMapKeyRef:
name: calico-config key: calico_backend - name: CLUSTER_TYPE value: "k8s,bgp"
- name: IP value: "autodetect"
- name: IP_AUTODETECTION_METHOD value: "interface=eth.*" #匹配本地有效网卡
- name: CALICO_IPV4POOL_IPIP value: "Always"
- name: CALICO_IPV4POOL_VXLAN value: "Never"
- name: FELIX_IPINIPMTU valueFrom:
configMapKeyRef:
name: calico-config key: veth_mtu - name: FELIX_VXLANMTU valueFrom:
configMapKeyRef:
name: calico-config key: veth_mtu - name: FELIX_WIREGUARDMTU valueFrom:
configMapKeyRef:
name: calico-config key: veth_mtu - name: CALICO_IPV4POOL_CIDR value: "172.10.0.0/16" #与前面定义的pod的CIDR保持一致
- name: CALICO_DISABLE_FILE_LOGGING value: "true"
- name: FELIX_DEFAULTENDPOINTTOHOSTACTION value: "ACCEPT"
- name: FELIX_IPV6SUPPORT value: "false"
- 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
- name: policysync mountPath: /var/run/nodeagent volumes:
- 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 - name: cni-bin-dir hostPath:
path: /opt/cni/bin - name: cni-net-dir hostPath:
path: /etc/cni/net.d - name: host-local-net-dir hostPath:
path: /var/lib/cni/networks - name: policysync hostPath:
type: DirectoryOrCreate path: /var/run/nodeagent - name: flexvol-driver-host hostPath:
type: DirectoryOrCreate path: /usr/libexec/kubernetes/kubelet-plugins/volume/exec/nodeagent~uds
---apiVersion: apps/v1kind: Deploymentmetadata:
name: calico-kube-controllers namespace: kube-system labels:
k8s-app: calico-kube-controllersspec:
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:
- key: CriticalAddonsOnly operator: Exists - key: node-role.kubernetes.io/master effect: NoSchedule serviceAccountName: calico-kube-controllers priorityClassName: system-cluster-critical containers:
- name: calico-kube-controllers image: calico/kube-controllers:v3.15.1 env:
- name: ENABLED_CONTROLLERS value: node - name: DATASTORE_TYPE value: kubernetes readinessProbe:
exec:
command:
- /usr/bin/check-status - -r#所有节点拉取镜像docker pull calico/kube-controllers:v3.15.1 docker pull calico/cni:v3.15.1 docker pull calico/pod2daemon-flexvol:v3.15.1 docker pull calico/node:v3.15.1
kubectl apply -f /etc/kubernetes/addons/calico-rbac.yaml kubectl apply -f /etc/kubernetes/addons/calico.yaml
node加入集群
- node加入（所有node节点执行）：
kubeadm join 192.168.30.128:6443 --token 1ndel7.xb623vep9pl5o6vl \ --discovery-token-ca-cert-hash sha256:0e41f6020955c36970bf504cbfc0047941240dda57ebb9d85086706da14dcd1f
- 查看集群节点：
kubectl edit cm kube-proxy -n kube-system #修改mode为ipvskubectl get pod -n kube-system NAME READY STATUS RESTARTS AGE calico-kube-controllers-578894d4cd-vtv6z 1/1 Running 0 68m calico-node-6qlsv 1/1 Running 0 68m calico-node-c5nz9 1/1 Running 0 68m calico-node-j2b2q 1/1 Running 0 68m calico-node-sphbr 1/1 Running 0 68m coredns-546565776c-fdzsv 1/1 Running 0 4m27s coredns-546565776c-z7tzl 1/1 Running 0 4m1s etcd-master 1/1 Running 0 29h kube-apiserver-master 1/1 Running 0 29h kube-controller-manager-master 1/1 Running 0 29h kube-proxy-k4tj5 1/1 Running 0 12m kube-proxy-nl5wd 1/1 Running 0 11m kube-proxy-rzz9c 1/1 Running 0 12m kube-proxy-ssgc5 1/1 Running 0 12m kube-scheduler-master 1/1 Running 0 29h kubectl get nodes NAME STATUS ROLES AGE VERSION master Ready master 28h v1.18.3 node1 Ready <none> 26h v1.18.3 node2 Ready <none> 26h v1.18.3 node3 Ready <none> 26h v1.18.3
可以看到，整个集群有1个master节点和3个node节点，都处于ready状态。
可用性测试
集群已经初步搭建起来，下面进行集群的可用性测试。
一个DaemonSet对象能确保其创建的Pod在集群中的每一台（或指定）Node上都运行一个副本。如果集群中动态加入了新的Node，DaemonSet中的Pod也会被添加在新加入的Node上运行。删除一个DaemonSet也会级联删除所有其创建的Pod。
因此，创建一个DaemonSet对象来测试可用性比较合适。
- 创建nginx daemonset：
vim /software/nginx-ds.yaml
apiVersion: v1kind: Servicemetadata: name: nginx-ds labels: app: nginx-dsspec: type: NodePort selector: app: nginx-ds ports: - name: http port: 80 targetPort: 80---apiVersion: apps/v1kind: DaemonSetmetadata: name: nginx-dsspec: selector: matchLabels: app: nginx-ds template: metadata: labels: app: nginx-ds spec: containers: - name: my-nginx image: jbednarik/nginx-ping:latest imagePullPolicy: IfNotPresent ports: - containerPort: 80
kubectl apply -f /software/nginx-ds.yaml
- 检查ip连通性：
kubectl get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES nginx-ds-5mm88 1/1 Running 0 68m 172.10.135.1 node3 <none> <none>nginx-ds-db2wt 1/1 Running 0 68m 172.10.166.129 node1 <none> <none>nginx-ds-zwfrh 1/1 Running 0 68m 172.10.104.2 node2 <none> <none>kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 19m nginx-ds NodePort 10.104.212.162 <none> 80:32329/TCP 2m22s
在每个节点上ping pod ip，同时访问服务ip及其端口，在每个节点检查node-port可用性。
- 检查dns可用性：
vim /software/nginx-pod.yaml
apiVersion: v1kind: Podmetadata: name: nginxspec: containers: - name: nginx image: jbednarik/nginx-ping:latest imagePullPolicy: IfNotPresent ports: - containerPort: 80
kubectl apply -f /software/nginx-pod.yaml kubectl exec -it nginx ping nginx-ds PING nginx-ds.default.svc.cluster.local (10.104.212.162) 56(84) bytes of data. 64 bytes from nginx-ds.default.svc.cluster.local (10.104.212.162): icmp_seq=1 ttl=64 time=0.042 ms 64 bytes from nginx-ds.default.svc.cluster.local (10.104.212.162): icmp_seq=2 ttl=64 time=0.066 ms 64 bytes from nginx-ds.default.svc.cluster.local (10.104.212.162): icmp_seq=3 ttl=64 time=0.075 ms 64 bytes from nginx-ds.default.svc.cluster.local (10.104.212.162): icmp_seq=4 ttl=64 time=0.092 ms 64 bytes from nginx-ds.default.svc.cluster.local (10.104.212.162): icmp_seq=5 ttl=64 time=0.073 ms kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 19m nginx-ds NodePort 10.104.212.162 <none> 80:32329/TCP 2m22s
可以看到，在nginx pod中ping nginx-ds时dns解析没问题，返回的是nginx-ds的cluster-ip。这说明之前搭建的集群正常可用。
部署ingress-nginx
- 部署ingress-nginx：
vim /etc/kubernetes/addons/ingress-nginx.yaml
apiVersion: v1kind: Namespacemetadata:
name: ingress-nginx---apiVersion: v1kind: Servicemetadata:
name: default-http-backend namespace: ingress-nginx labels:
app.kubernetes.io/name: default-http-backend app.kubernetes.io/part-of: ingress-nginxspec:
ports:
- port: 80
targetPort: 8080
selector:
app.kubernetes.io/name: default-http-backend app.kubernetes.io/part-of: ingress-nginx
---apiVersion: apps/v1kind: Deploymentmetadata:
name: default-http-backend namespace: ingress-nginx labels:
app.kubernetes.io/name: default-http-backend app.kubernetes.io/part-of: ingress-nginxspec:
replicas: 1
selector:
matchLabels:
app.kubernetes.io/name: default-http-backend app.kubernetes.io/part-of: ingress-nginx template:
metadata:
labels:
app.kubernetes.io/name: default-http-backend app.kubernetes.io/part-of: ingress-nginx spec:
terminationGracePeriodSeconds: 60
containers:
- name: default-http-backend image: k8s.gcr.io/defaultbackend-amd64:1.5
ports:
- containerPort: 8080
resources:
limits:
cpu: 10m memory: 20Mi requests:
cpu: 10m memory: 20Mi livenessProbe:
httpGet:
path: /healthz port: 8080
scheme: HTTP initialDelaySeconds: 30
timeoutSeconds: 5---apiVersion: v1kind: ConfigMapmetadata:
name: nginx-configuration namespace: ingress-nginx labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx---apiVersion: v1kind: ConfigMapmetadata:
name: tcp-services namespace: ingress-nginx labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx---apiVersion: v1kind: ConfigMapmetadata:
name: udp-services namespace: ingress-nginx labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx---apiVersion: v1kind: ServiceAccountmetadata:
name: nginx-ingress-serviceaccount namespace: ingress-nginx labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx---apiVersion: rbac.authorization.k8s.io/v1beta1kind: ClusterRolemetadata:
name: nginx-ingress-clusterrole labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginxrules:
- apiGroups:
- ""
resources:
- configmaps - endpoints - nodes - pods - secrets verbs:
- list - watch - apiGroups:
- ""
resources:
- nodes verbs:
- get - apiGroups:
- ""
resources:
- services verbs:
- get - list - watch - apiGroups:
- "extensions"
resources:
- ingresses verbs:
- get - list - watch - apiGroups:
- ""
resources:
- events verbs:
- create - patch - apiGroups:
- "extensions"
resources:
- ingresses/status verbs:
- update---apiVersion: rbac.authorization.k8s.io/v1beta1kind: Rolemetadata:
name: nginx-ingress-role namespace: ingress-nginx labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginxrules:
- apiGroups:
- ""
resources:
- configmaps - pods - secrets - namespaces verbs:
- get - apiGroups:
- ""
resources:
- configmaps resourceNames:
- "ingress-controller-leader-nginx"
verbs:
- get - update - apiGroups:
- ""
resources:
- configmaps verbs:
- create - apiGroups:
- ""
resources:
- endpoints verbs:
- get---apiVersion: rbac.authorization.k8s.io/v1beta1kind: ClusterRoleBindingmetadata:
name: nginx-ingress-clusterrole-binding labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginxroleRef:
apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: nginx-ingress-clusterrolesubjects:
- kind: ServiceAccount name: nginx-ingress-serviceaccount namespace: ingress-nginx
---apiVersion: rbac.authorization.k8s.io/v1beta1kind: RoleBindingmetadata:
name: nginx-ingress-role-binding namespace: ingress-nginx labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginxroleRef:
apiGroup: rbac.authorization.k8s.io kind: Role name: nginx-ingress-rolesubjects:
- kind: ServiceAccount name: nginx-ingress-serviceaccount namespace: ingress-nginx---apiVersion: v1kind: Servicemetadata:
name: ingress-nginx namespace: ingress-nginx labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginxspec:
selector:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx ports:
- name: http port: 80
targetPort: http - name: https port: 443
targetPort: https
---apiVersion: apps/v1kind: DaemonSetmetadata:
name: ingress-nginx namespace: ingress-nginx labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginxspec:
revisionHistoryLimit: 2147483647
selector:
matchLabels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx updateStrategy:
rollingUpdate:
maxUnavailable: 1
type: RollingUpdate template:
metadata:
labels:
app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx annotations:
prometheus.io/port: "10254"
prometheus.io/scrape: "true"
spec:
containers:
- name: nginx-ingress-controller image: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.19.0 imagePullPolicy: IfNotPresent args:
- /nginx-ingress-controller - --default-backend-service=$(POD_NAMESPACE)/default-http-backend - --configmap=$(POD_NAMESPACE)/nginx-configuration - --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services - --udp-services-configmap=$(POD_NAMESPACE)/udp-services - --publish-service=$(POD_NAMESPACE)/ingress-nginx - --annotations-prefix=nginx.ingress.kubernetes.io env:
- name: POD_NAME valueFrom:
fieldRef:
apiVersion: v1 fieldPath: metadata.name - name: POD_NAMESPACE valueFrom:
fieldRef:
apiVersion: v1 fieldPath: metadata.namespace ports:
- containerPort: 80
hostPort: 80
name: http protocol: TCP - containerPort: 443
hostPort: 443
name: https protocol: TCP livenessProbe:
failureThreshold: 3
httpGet:
path: /healthz port: 10254
scheme: HTTP initialDelaySeconds: 10
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
readinessProbe:
failureThreshold: 3
httpGet:
path: /healthz port: 10254
scheme: HTTP periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
resources: {}
securityContext:
capabilities:
add:
- NET_BIND_SERVICE drop:
- ALL procMount: Default runAsUser: 33
terminationMessagePath: /dev/termination-log terminationMessagePolicy: File dnsPolicy: ClusterFirst hostNetwork: true
restartPolicy: Always schedulerName: default-scheduler securityContext: {}
serviceAccount: nginx-ingress-serviceaccount serviceAccountName: nginx-ingress-serviceaccount terminationGracePeriodSeconds: 30#node节点拉取镜像docker pull k8s.gcr.io/defaultbackend-amd64:1.5 docker pull quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.19.0
kubectl apply -f /etc/kubernetes/addons/ingress-nginx.yaml kubectl get all -n ingress-nginx NAME READY STATUS RESTARTS AGE pod/default-http-backend-6bf4c44778-n5b55 1/1 Running 0 3m35s pod/ingress-nginx-2fkhl 1/1 Running 0 3m34s pod/ingress-nginx-lbvrv 1/1 Running 0 3m34s pod/ingress-nginx-sz89b 1/1 Running 0 3m34s NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/default-http-backend ClusterIP 10.106.154.51 <none> 80/TCP 3m35s service/ingress-nginx ClusterIP 10.109.151.107 <none> 80/TCP,443/TCP 3m34s NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE daemonset.apps/ingress-nginx 3 3 3 3 3 <none> 3m34s NAME READY UP-TO-DATE AVAILABLE AGE deployment.apps/default-http-backend 1/1 1 1 3m35s NAME DESIRED CURRENT READY AGE replicaset.apps/default-http-backend-6bf4c44778 1 1 1 3m35s
- 使用测试：
vim /software/tomcat-demo.yaml
apiVersion: extensions/v1beta1kind: Ingressmetadata: name: tomcat-demospec: rules: - host: tomcat.lzxlinux.cn http: paths: - path: / backend: serviceName: tomcat-demo servicePort: 80 ---apiVersion: v1kind: Servicemetadata: name: tomcat-demospec: ports: - port: 80 protocol: TCP targetPort: 8080 selector: app: tomcat-demo ---apiVersion: apps/v1kind: Deploymentmetadata: name: tomcat-demospec: selector: matchLabels: app: tomcat-demo replicas: 1 template: metadata: labels: app: tomcat-demo spec: containers: - name: tomcat-demo image: registry.cn-hangzhou.aliyuncs.com/liuyi01/tomcat:8.0.51-alpine ports: - containerPort: 8080
kubectl apply -f /software/tomcat-demo.yaml kubectl get ing NAME CLASS HOSTS ADDRESS PORTS AGE tomcat-demo <none> tomcat.lzxlinux.cn 80 2m46s
任选一node节点ip，在Windows电脑hosts文件中添加本地dns：
192.168.30.129 tomcat.lzxlinux.cn 192.168.30.129 api.lzxlinux.cn
可以看到，因为在yaml文件中有定义，所以通过域名可以访问到集群内的名为tomcat-demo（端口为80）的服务，否则返回默认后端404。
ingres-nginx部署完成，kubernetes集群搭建完成。
这篇关于Kubeadm方式搭建K8S集群的文章就介绍到这儿，希望我们推荐的文章对大家有所帮助，也希望大家多多支持为之网！
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