Kubeadm方式搭建K8S集群
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 firewalld
sed -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 -a
sed -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
EOF
modprobe 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 docker
cat > /etc/docker/daemon.json <<EOF
{
"registry-mirrors": ["http://f1361db2.m.daocloud.io"],
"exec-opts":["native.cgroupdriver=systemd"]
}
EOF
systemctl 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
EOF
yum 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/v1beta2
kind: ClusterConfiguration
kubernetesVersion: v1.18.3
controlPlaneEndpoint: 192.168.30.128:6443
networking:
podSubnet: 172.10.0.0/16
imageRepository: 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_profile
source ~/.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: v1
kind: ServiceAccount
metadata:
name: calico-kube-controllers
namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: calico-kube-controllers
rules:
- 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: 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
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: calico-node
namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: calico-node
rules:
- 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/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
vim /etc/kubernetes/addons/calico.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: calico-config
namespace: kube-system
data:
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/v1
kind: CustomResourceDefinition
metadata:
name: bgpconfigurations.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: bgppeers.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: blockaffinities.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: clusterinformations.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: felixconfigurations.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: globalnetworkpolicies.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: globalnetworksets.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: hostendpoints.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: ipamblocks.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: ipamconfigs.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: ipamhandles.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: ippools.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: kubecontrollersconfigurations.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: networkpolicies.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
name: networksets.crd.projectcalico.org
spec:
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: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
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:
- 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: 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/v1
kind: Deployment
metadata:
name: calico-kube-controllers
namespace: kube-system
labels:
k8s-app: calico-kube-controllers
spec:
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ipvs
kubectl 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: v1
kind: Service
metadata:
name: nginx-ds
labels:
app: nginx-ds
spec:
type: NodePort
selector:
app: nginx-ds
ports:
- name: http
port: 80
targetPort: 80
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: nginx-ds
spec:
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: v1
kind: Pod
metadata:
name: nginx
spec:
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: v1
kind: Namespace
metadata:
name: ingress-nginx
---
apiVersion: v1
kind: Service
metadata:
name: default-http-backend
namespace: ingress-nginx
labels:
app.kubernetes.io/name: default-http-backend
app.kubernetes.io/part-of: ingress-nginx
spec:
ports:
- port: 80
targetPort: 8080
selector:
app.kubernetes.io/name: default-http-backend
app.kubernetes.io/part-of: ingress-nginx
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: default-http-backend
namespace: ingress-nginx
labels:
app.kubernetes.io/name: default-http-backend
app.kubernetes.io/part-of: ingress-nginx
spec:
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: v1
kind: ConfigMap
metadata:
name: nginx-configuration
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
---
apiVersion: v1
kind: ConfigMap
metadata:
name: tcp-services
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
---
apiVersion: v1
kind: ConfigMap
metadata:
name: udp-services
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
---
apiVersion: v1
kind: ServiceAccount
metadata:
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/v1beta1
kind: ClusterRole
metadata:
name: nginx-ingress-clusterrole
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
rules:
- 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/v1beta1
kind: Role
metadata:
name: nginx-ingress-role
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
rules:
- 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/v1beta1
kind: ClusterRoleBinding
metadata:
name: nginx-ingress-clusterrole-binding
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: nginx-ingress-clusterrole
subjects:
- kind: ServiceAccount
name: nginx-ingress-serviceaccount
namespace: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: RoleBinding
metadata:
name: nginx-ingress-role-binding
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: nginx-ingress-role
subjects:
- kind: ServiceAccount
name: nginx-ingress-serviceaccount
namespace: ingress-nginx
---
apiVersion: v1
kind: Service
metadata:
name: ingress-nginx
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
spec:
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/v1
kind: DaemonSet
metadata:
name: ingress-nginx
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
spec:
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/v1beta1
kind: Ingress
metadata:
name: tomcat-demo
spec:
rules:
- host: tomcat.lzxlinux.cn
http:
paths:
- path: /
backend:
serviceName: tomcat-demo
servicePort: 80
---
apiVersion: v1
kind: Service
metadata:
name: tomcat-demo
spec:
ports:
- port: 80
protocol: TCP
targetPort: 8080
selector:
app: tomcat-demo
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: tomcat-demo
spec:
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。