目录
一 什么是微服务
用控制器来完成集群的工作负载,那么应用如何暴漏出去?需要通过微服务暴漏出去后才能被访问
Service是一组提供相同服务的Pod对外开放的接口。
借助Service,应用可以实现服务发现和负载均衡。
service默认只支持4层负载均衡能力,没有7层功能。(可以通过Ingress实现)
二 微服务的类型
微服务类型 | 作用描述 |
ClusterIP | 默认值,k8s系统给service自动分配的虚拟IP,只能在集群内部访问 |
NodePort | 将Service通过指定的Node上的端口暴露给外部,访问任意一个NodeIP:nodePort都将路由到ClusterIP |
LoadBalancer | 在NodePort的基础上,借助cloud provider创建一个外部的负载均衡器,并将请求转发到 NodeIP:NodePort,此模式只能在云服务器上使用 |
ExternalName | 将服务通过 DNS CNAME 记录方式转发到指定的域名(通过 spec.externlName 设定 |
示例:
#生成控制器文件并建立控制器
[root@k8s-master ~]# kubectl create deployment timinglee --image reg.timinglee.org/library/myapp:v1 --replicas 2 --dry-run=client -o yaml > timinglee.yaml
[root@k8s-master ~]# kubectl apply -f timinglee.yaml
deployment.apps/timinglee created
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
timinglee-56f99b7f4b-4c9kc 1/1 Running 0 6s
timinglee-56f99b7f4b-9wlxl 1/1 Running 0 6s
#生成微服务yaml追加到已有yaml
[root@k8s-master ~]# kubectl expose deployment timinglee --port 80 --target-port 80 --dry-run=client -o yaml >> timinglee.yaml[root@k8s-master ~]# vim timinglee.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: timinglee
name: timinglee
spec:
replicas: 2
selector:
matchLabels:
app: timinglee
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: timinglee
spec:
containers:
- image: reg.timinglee.org/library/myapp:v1
name: myapp
resources: {}
status: {}--- #不同资源间用---隔开
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: timinglee
name: timinglee
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: timinglee
status:
loadBalancer: {}[root@k8s-master ~]# kubectl delete deployments.apps timinglee
deployment.apps "timinglee" deleted
[root@k8s-master ~]# kubectl get pods
No resources found in default namespace.[root@k8s-master ~]# kubectl apply -f timinglee.yaml
deployment.apps/timinglee created
service/timinglee created
[root@k8s-master ~]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
timinglee ClusterIP 10.99.121.99 <none> 80/TCP
微服务默认使用iptables调度
[root@k8s-master ~]# kubectl get service -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d <none>
timinglee ClusterIP 10.99.121.99 <none> 80/TCP 89s app=timinglee #集群内部IP 10.99.121.99#可以在火墙中查看到策略信息
[root@k8s-master ~]# iptables -t nat -nL
Chain KUBE-SVC-I7WXYK76FWYNTTGM (1 references)
target prot opt source destination
KUBE-MARK-MASQ tcp -- !10.244.0.0/16 10.99.121.99 /* default/timinglee cluster IP */ tcp dpt:80
三 ipvs模式
- Service 是由 kube-proxy 组件,加上 iptables 来共同实现的
- kube-proxy 通过 iptables 处理 Service 的过程,需要在宿主机上设置相当多的 iptables 规则,如果宿主机有大量的Pod,不断刷新iptables规则,会消耗大量的CPU资源
- IPVS模式的service,可以使K8s集群支持更多量级的Pod
3.1 ipvs模式配置方式
1 在所有节点中安装ipvsadm
[root@k8s-master/node/node2 ~]# yum install ipvsadm.x86_64 -y
2 修改master节点的代理配置
[root@k8s-master ~]# kubectl -n kube-system edit cm kube-proxy
configmap/kube-proxy edited
metricsBindAddress: ""
mode: "ipvs" #设置kube-proxy使用ipvs模式
nftables:
3 重启pod,在pod运行时配置文件中采用默认配置,当改变配置文件后已经运行的pod状态不会变化,所以要重启pod
[root@k8s-master ~]# kubectl -n kube-system get pods | awk '/kube-proxy/{system("kubectl -n kube-system delete pods "$1)}'
pod "kube-proxy-22hr6" deleted
pod "kube-proxy-r4jj7" deleted
pod "kube-proxy-vwfgr" deleted[root@k8s-master ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.96.0.1:443 rr
-> 192.168.10.100:6443 Masq 1 0 0
TCP 10.96.0.10:53 rr
-> 10.244.0.2:53 Masq 1 0 0
-> 10.244.0.3:53 Masq 1 0 0
TCP 10.96.0.10:9153 rr
-> 10.244.0.2:9153 Masq 1 0 0
-> 10.244.0.3:9153 Masq 1 0 0
TCP 10.99.121.99:80 rr
-> 10.244.1.3:80 Masq 1 0 0
-> 10.244.2.3:80 Masq 1 0 0
UDP 10.96.0.10:53 rr
-> 10.244.0.2:53 Masq 1 0 0
-> 10.244.0.3:53 Masq 1 0 0
[root@k8s-master ~]#
注意:
切换ipvs模式后,kube-proxy会在宿主机上添加一个虚拟网卡:kube-ipvs0,并分配所有service IP
[root@k8s-master ~]# ip a | tail
inet6 fe80::ac84:aaff:fe44:17f3/64 scope link
valid_lft forever preferred_lft forever
8: kube-ipvs0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default
link/ether 9e:10:d2:0c:25:33 brd ff:ff:ff:ff:ff:ff
inet 10.96.0.1/32 scope global kube-ipvs0
valid_lft forever preferred_lft forever
inet 10.99.121.99/32 scope global kube-ipvs0
valid_lft forever preferred_lft forever
inet 10.96.0.10/32 scope global kube-ipvs0
valid_lft forever preferred_lft forever
[root@k8s-master ~]#
四 微服务类型详解
4.1 clusterip
特点:
clusterip模式只能在集群内访问,并对集群内的pod提供健康检测和自动发现功能
示例:
[root@k8s-master ~]# vim myapp.yml
---
apiVersion: v1
kind: Service
metadata:
labels:
app: timinglee
name: timinglee
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: timinglee
type: ClusterIP[root@k8s-master ~]# kubectl apply -f myapp.yml
service/timinglee created[root@k8s-master ~]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
timinglee ClusterIP 10.110.19.199 <none> 80/TCP 16s
#service创建后集群DNS提供解析
[root@k8s-master ~]# kubectl -n kube-system get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP,9153/TCP 31d
[root@k8s-master ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
timinglee ClusterIP 10.110.19.199 <none> 80/TCP 12m[root@k8s-master ~]# dig timinglee.dedault.svc.cluster.local@10.96.0.10
; <<>> DiG 9.16.23-RH <<>> timinglee.dedault.svc.cluster.local@10.96.0.10
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 48678
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0;; QUESTION SECTION:
;timinglee.dedault.svc.cluster.local\@10.96.0.10. IN A;; AUTHORITY SECTION:
. 3600 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2024101500 1800 900 604800 86400;; Query time: 1066 msec
;; SERVER: 114.114.114.114#53(114.114.114.114)
;; WHEN: Tue Oct 15 15:48:32 CST 2024
;; MSG SIZE rcvd: 139
4.2 ClusterIP中的特殊模式headless
headless(无头服务)
对于无头 Services
并不会分配 Cluster IP,kube-proxy不会处理它们, 而且平台也不会为它们进行负载均衡和路由,集群访问通过dns解析直接指向到业务pod上的IP,所有的调度有dns单独完成
[root@k8s-master ~]# kubectl delete -f myapp.yml
service "timinglee" deleted
[root@k8s-master ~]# vim myapp.yml
[root@k8s-master ~]# cat myapp.yml
---
apiVersion: v1
kind: Service
metadata:
labels:
app: timinglee
name: timinglee
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: timinglee
type: ClusterIP
clusterIP: None
[root@k8s-master ~]# kubectl apply -f myapp.yml
service/timinglee created
[root@k8s-master ~]# kubectl get service timinglee
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
timinglee ClusterIP None <none> 80/TCP 51s[root@k8s-master ~]# dig timinglee.dedault.svc.cluster.local@10.96.0.10
; <<>> DiG 9.16.23-RH <<>> timinglee.dedault.svc.cluster.local@10.96.0.10
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 57288
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;timinglee.dedault.svc.cluster.local\@10.96.0.10. IN A;; AUTHORITY SECTION:
. 3233 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2024101500 1800 900 604800 86400;; Query time: 27 msec
;; SERVER: 114.114.114.114#53(114.114.114.114)
;; WHEN: Tue Oct 15 15:54:39 CST 2024
;; MSG SIZE rcvd: 150
[root@k8s-master ~]# kubectl run test --image reg.timinglee.org/library/busyboxplus:latest -it
If you don't see a command prompt, try pressing enter./ # nslookup timinglee.default.svc.cluster.local.
Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.localName: timinglee.default.svc.cluster.local.
Address 1: 10.96.132.41 timinglee.default.svc.cluster.local
/ # curl timinglee.default.svc.cluster.local.
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
/ # curl timinglee
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
/ # curl timinglee/hostname.html
timinglee-56f99b7f4b-fnqrp
4.3 nodeport
通过ipvs暴漏端口从而使外部主机通过master节点的对外ip:<port>来访问pod业务
其访问过程为:
示例:
[root@k8s-master ~]# vim timinglee.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: timinglee
name: timinglee
spec:
replicas: 2
selector:
matchLabels:
app: timinglee
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: timinglee
spec:
containers:
- image: reg.timinglee.org/library/myapp:v1
name: myapp
resources: {}
status: {}---
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: timinglee
name: timinglee
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: timinglee
type: NodePort
status:
loadBalancer: {}[root@k8s-master ~]# kubectl apply -f timinglee.yaml
deployment.apps/timinglee created
service/timinglee created
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
timinglee-56f99b7f4b-blxbj 1/1 Running 0 5s
timinglee-56f99b7f4b-sbl2r 1/1 Running 0 5s
[root@k8s-master ~]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
timinglee NodePort 10.103.125.62 <none> 80:32494/TCP 15s
[root@k8s-master ~]# curl 192.168.10.100:32494
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
[root@k8s-master ~]# curl 192.168.10.100:32494/hostname.html
timinglee-56f99b7f4b-sbl2r
[root@k8s-master ~]# curl 192.168.10.100:32494/hostname.html
timinglee-56f99b7f4b-blxbj
注意:
nodeport默认端口
nodeport默认端口是30000-32767,超出会报错
[root@k8s-master ~]# vim timinglee.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: timinglee
name: timinglee
spec:
replicas: 2
selector:
matchLabels:
app: timinglee
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: timinglee
spec:
containers:
- image: reg.timinglee.org/library/myapp:v1
name: myapp---
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: timinglee-service
name: timinglee-service
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
nodePort: 33333
selector:
app: timinglee
type: NodePort
status:
loadBalancer: {}[root@k8s-master ~]# kubectl apply -f timinglee.yaml
deployment.apps/timinglee created
The Service "timinglee-service" is invalid: spec.ports[0].nodePort: Invalid value: 33333: provided port is not in the valid range. The range of valid ports is 30000-32767
如果需要使用这个范围以外的端口就需要特殊设定
[root@k8s-master ~]# vim /etc/kubernetes/manifests/kube-apiserver.yaml
- --service-node-port-range=30000-40000
注意:
添加“--service-node-port-range=“ 参数,端口范围可以自定义
修改后api-server会自动重启,等apiserver正常启动后才能操作集群
集群重启自动完成在修改完参数后全程不需要人为干预
4.4 loadbalancer
云平台会为我们分配vip并实现访问,如果是裸金属主机那么需要metallb来实现ip的分配
[root@k8s-master ~]# vim timinglee.yaml
......---
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: timinglee-service
name: timinglee-service
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: timinglee
type: LoadBalancer
status:
loadBalancer: {}
[root@k8s-master ~]# kubectl delete -f timinglee.yaml
deployment.apps "timinglee" deleted
service "timinglee-service" deleted
[root@k8s-master ~]# kubectl apply -f timinglee.yaml
deployment.apps/timinglee created
service/timinglee-service created
[root@k8s-master ~]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
timinglee-service LoadBalancer 10.111.37.137 <pending> 80:37927/TCP 12sLoadBalancer模式适用云平台,裸金属环境需要安装metallb提供支持
4.5 metalLB
官网:Installation :: MetalLB, bare metal load-balancer for Kubernetes
metalLB功能:
为LoadBalancer分配vip
部署方式
1.设置ipvs模式
[root@k8s-master ~]# kubectl edit cm -n kube-system kube-proxy
configmap/kube-proxy edited
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
mode: "ipvs"
ipvs:
strictARP: true[root@k8s-master ~]# kubectl -n kube-system get pods | awk '/kube-proxy/{system("kubectl -n kube-system delete pods "$1)}'
pod "kube-proxy-6785p" deleted
pod "kube-proxy-vmk8g" deleted
pod "kube-proxy-w4qgl" deleted2.下载部署文件(资源已发)
[root@k8s2 metallb]# wget https://raw.githubusercontent.com/metallb/metallb/v0.13.12/config/manifests/metallb-native.yaml
3.修改文件中镜像地址,与harbor仓库路径保持一致
[root@k8s-master ~]# vim metallb-native.yaml
...
image: metallb/controller:v0.14.8
image: metallb/speaker:v0.14.84.上传镜像到harbor
[root@k8s-master ~]# docker pull quay.io/metallb/controller:v0.14.8
[root@k8s-master ~]# docker pull quay.io/metallb/speaker:v0.14.8[root@k8s-master metallb]# docker load -i metalLB.tag.gz
f144bb4c7c7f: Loading layer 327.7kB/327.7kB
49626df344c9: Loading layer 40.96kB/40.96kB
945d17be9a3e: Loading layer 2.396MB/2.396MB
4d049f83d9cf: Loading layer 1.536kB/1.536kB
af5aa97ebe6c: Loading layer 2.56kB/2.56kB
ac805962e479: Loading layer 2.56kB/2.56kB
bbb6cacb8c82: Loading layer 2.56kB/2.56kB
2a92d6ac9e4f: Loading layer 1.536kB/1.536kB
1a73b54f556b: Loading layer 10.24kB/10.24kB
f4aee9e53c42: Loading layer 3.072kB/3.072kB
b336e209998f: Loading layer 238.6kB/238.6kB
371134a463a4: Loading layer 61.38MB/61.38MB
6e64357636e3: Loading layer 13.31kB/13.31kB
Loaded image: quay.io/metallb/controller:v0.14.8
0b8392a2e3be: Loading layer 2.137MB/2.137MB
3d5a6e3a17d1: Loading layer 65.46MB/65.46MB
8311c2bd52ed: Loading layer 49.76MB/49.76MB
4f4d43efeed6: Loading layer 3.584kB/3.584kB
881ed6f5069a: Loading layer 13.31kB/13.31kB
Loaded image: quay.io/metallb/speaker:v0.14.8
[root@k8s-master ~]# docker tag quay.io/metallb/speaker:v0.14.8 reg.timinglee.org/metallb/speaker:v0.14.8
[root@k8s-master ~]# docker tag quay.io/metallb/controller:v0.14.8 reg.timinglee.org/metallb/controller:v0.14.8[root@k8s-master ~]# docker push reg.timinglee.org/metallb/speaker:v0.14.8
[root@k8s-master ~]# docker push reg.timinglee.org/metallb/controller:v0.14.85.部署服务
[root@k8s-master metallb]# kubectl apply -f metallb-native.yaml
[root@k8s-master metallb]# kubectl -n metallb-system get pods
NAME READY STATUS RESTARTS AGE
controller-584575df59-wblql 1/1 Running 0 29s
speaker-8xwvh 1/1 Running 0 29s
speaker-m845b 1/1 Running 0 29s
speaker-wrvh7 1/1 Running 0 29s
6.配置分配地址段
[root@k8s-master metallb]# vim configmap.yml
apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
name: first-pool #地址池名称
namespace: metallb-system
spec:
addresses:
- 192.168.10.10-192.168.10.200 #修改为自己本地地址段--- #两个不同的kind中间必须加分割
apiVersion: metallb.io/v1beta1
kind: L2Advertisement
metadata:
name: example
namespace: metallb-system
spec:
ipAddressPools:
- first-pool #使用地址池[root@k8s-master ~]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
timinglee-service LoadBalancer 10.105.122.155 192.168.10.50 80:36677/TCP 11s#通过分配地址从集群外访问服务
[root@k8s-master ~]# curl 192.168.10.50
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
4.6 externalname
开启services后,不会被分配IP,而是用dns解析CNAME固定域名来解决ip变化问题
一般应用于外部业务和pod沟通或外部业务迁移到pod内时
在应用向集群迁移过程中,externalname在过度阶段就可以起作用了。
集群外的资源迁移到集群时,在迁移的过程中ip可能会变化,但是域名+dns解析能完美解决此问题
示例:
[root@k8s-master ~]# vim timinglee.yaml
[root@k8s-master ~]# cat timinglee.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: timinglee
name: timinglee
spec:
replicas: 2
selector:
matchLabels:
app: timinglee
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: timinglee
spec:
containers:
- image: reg.timinglee.org/library/myapp:v1
name: myapp---
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: timinglee-service
name: timinglee-service
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: timinglee
type: ExternalName
externalName: www.timinglee.org
status:
loadBalancer: {}[root@k8s-master ~]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
timinglee-service ExternalName <none> www.timinglee.org 80/TCP 8s
五 Ingress-nginx
官网:
Installation Guide - Ingress-Nginx Controller
5.1 ingress-nginx功能
- 一种全局的、为了代理不同后端 Service 而设置的负载均衡服务,支持7层
- Ingress由两部分组成:Ingress controller和Ingress服务
- Ingress Controller 会根据你定义的 Ingress 对象,提供对应的代理能力。
- 业界常用的各种反向代理项目,比如 Nginx、HAProxy、Envoy、Traefik 等,都已经为Kubernetes 专门维护了对应的 Ingress Controller。
5.2 部署ingress
#部署前准备工作
[root@k8s-master ~]# kubectl create deployment myappv1 --image reg.timinglee.org/library/myapp:v1 --dry-run=client -o yaml > myapp-v1.yml
[root@k8s-master ~]# cp myapp-v1.yml myapp-v2.yml
[root@k8s-master ~]# vim myapp-v2.yml
[root@k8s-master ~]# cat myapp-v1.yml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: myappv1
name: myappv1
spec:
replicas: 1
selector:
matchLabels:
app: myappv1
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: myappv1
spec:
containers:
- image: reg.timinglee.org/library/myapp:v1
name: myapp
resources: {}
status: {}
[root@k8s-master ~]# cat myapp-v2.yml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: myappv2
name: myappv2
spec:
replicas: 1
selector:
matchLabels:
app: myappv2
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: myappv2
spec:
containers:
- image: reg.timinglee.org/library/myapp:v2
name: myapp2
resources: {}
status: {}
[root@k8s-master ~]# kubectl apply -f myapp-v1.yml
deployment.apps/myappv1 created
[root@k8s-master ~]# kubectl apply -f myapp-v2.yml
deployment.apps/myappv2 created
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
myappv1-78ff74589d-mqm6k 1/1 Running 0 11s
myappv2-68578565d8-swgzv 1/1 Running 0 6s[root@k8s-master ~]# kubectl expose deployment myappv1 --port 80 --target-port 80 --dry-run=client -o yaml >> myapp-v1.yml
[root@k8s-master ~]# kubectl expose deployment myappv2 --port 80 --target-port 80 --dry-run=client -o yaml >> myapp-v2.yml[root@k8s-master ~]# vim myapp-v1.yml
[root@k8s-master ~]# vim myapp-v2.yml
[root@k8s-master ~]# cat myapp-v1.yml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: myappv1
name: myappv1
spec:
replicas: 1
selector:
matchLabels:
app: myappv1
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: myappv1
spec:
containers:
- image: reg.timinglee.org/library/myapp:v1
name: myapp
resources: {}
status: {}---
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: myappv1
name: myappv1
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: myappv1
status:
loadBalancer: {}
[root@k8s-master ~]# cat myapp-v2.yml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: myappv2
name: myappv2
spec:
replicas: 1
selector:
matchLabels:
app: myappv2
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: myappv2
spec:
containers:
- image: reg.timinglee.org/library/myapp:v2
name: myapp2
resources: {}
status: {}---
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: myappv2
name: myappv2
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: myappv2
status:
loadBalancer: {}
[root@k8s-master ~]# kubectl apply -f myapp-v1.yml
deployment.apps/myappv1 configured
service/myappv1 created
[root@k8s-master ~]# kubectl apply -f myapp-v2.yml
deployment.apps/myappv2 configured
service/myappv2 created
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
myappv1-78ff74589d-mqm6k 1/1 Running 0 4m59s
myappv2-68578565d8-swgzv 1/1 Running 0 4m54s
#测试[root@k8s-master ~]# kubectl get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
myappv1 ClusterIP 10.100.212.4 <none> 80/TCP 45s
myappv2 ClusterIP 10.99.186.84 <none> 80/TCP 40s
[root@k8s-master ~]# curl 10.100.212.4
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
[root@k8s-master ~]# curl 10.99.186.84
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
5.2.1 下载部署文件(资源已发)
[root@k8s-master ~]# wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.11.2/deploy/static/provider/baremetal/deploy.yaml
上传ingress所需镜像到harbor
[root@k8s-master ~]# docker tag registry.k8s.io/ingress-nginx/controller:v1.11.2@sha256:d5f8217feeac4887cb1ed21f27c2674e58be06bd8f5184cacea2a69abaf78dce reg.timinglee.org/ingress-nginx/controller:v1.11.2
[root@k8s-master ~]# docker tag registry.k8s.io/ingress-nginx/kube-webhook-certgen:v1.4.3@sha256:a320a50cc91bd15fd2d6fa6de58bd98c1bd64b9a6f926ce23a600d87043455a3 reg.timinglee.org/ingress-nginx/kube-webhook-certgen:v1.4.3
[root@k8s-master ~]# docker push reg.timinglee.org/ingress-nginx/controller:v1.11.2
[root@k8s-master ~]# docker push reg.timinglee.org/ingress-nginx/kube-webhook-certgen:v1.4.3
5.2.2 安装ingress
[root@k8s-master ~]# vim deploy.yaml
445 image: ingress-nginx/controller:v1.11.2
546 image: ingress-nginx/kube-webhook-certgen:v1.4.3
599 image: ingress-nginx/kube-webhook-certgen:v1.4.3[root@k8s-master ingress]# kubectl apply -f deploy.yaml
[root@k8s-master ingress]# kubectl -n ingress-nginx get pods
NAME READY STATUS RESTARTS AGE
ingress-nginx-admission-create-xql2j 0/1 Completed 0 38s
ingress-nginx-admission-patch-46zhq 0/1 Completed 2 38s
ingress-nginx-controller-67bd6649b6-whdjw 1/1 Running 0 38s
[root@k8s-master ingress]#
[root@k8s-master ingress]# kubectl -n ingress-nginx get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx-controller NodePort 10.96.34.154 <none> 80:38991/TCP,443:36893/TCP 63s
ingress-nginx-controller-admission ClusterIP 10.111.70.191 <none> 443/TCP 63s
#修改微服务为loadbalancer[root@k8s-master ~]# kubectl -n ingress-nginx edit svc ingress-nginx-controller
49 type: LoadBalancer[root@k8s-master ingress]# kubectl -n ingress-nginx get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx-controller LoadBalancer 10.96.34.154 <pending> 80:38991/TCP,443:36893/TCP 4m13s
ingress-nginx-controller-admission ClusterIP 10.111.70.191 <none> 443/TCP 4m13s[root@k8s-master ingress]# kubectl -n ingress-nginx get all
NAME READY STATUS RESTARTS AGE
pod/ingress-nginx-admission-create-xql2j 0/1 Completed 0 28m
pod/ingress-nginx-admission-patch-46zhq 0/1 Completed 2 28m
pod/ingress-nginx-controller-67bd6649b6-whdjw 1/1 Running 0 28mNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/ingress-nginx-controller LoadBalancer 10.96.34.154 192.168.10.50 80:38991/TCP,443:36893/TCP 28m
service/ingress-nginx-controller-admission ClusterIP 10.111.70.191 <none> 443/TCP 28mNAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/ingress-nginx-controller 1/1 1 1 28mNAME DESIRED CURRENT READY AGE
replicaset.apps/ingress-nginx-controller-67bd6649b6 1 1 1 28mNAME STATUS COMPLETIONS DURATION AGE
job.batch/ingress-nginx-admission-create Complete 1/1 7s 28m
job.batch/ingress-nginx-admission-patch Complete 1/1 20s 28m
[root@k8s-master ingress]#
注意:
在ingress-nginx-controller中看到的对外IP就是ingress最终对外开放的ip
5.2.3 测试ingress
#生成yaml文件
[root@k8s-master ingress]# kubectl create ingress webcluster --rule '*/=timinglee-svc:80' --dry-run=client -o yaml > timinglee-ingress.yml
[root@k8s-master ingress]# vim timinglee-ingress.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: test-ingress
spec:
rules:
- http:
paths:
- backend:
service:
name: timinglee-svc
port:
number: 80
path: /
pathType: Prefix#Exact(精确匹配),ImplementationSpecific(特定实现),Prefix(前缀匹配),Regular expression(正则表达式匹配)
#建立ingress控制器
[root@k8s-master ingress]# kubectl apply -f timinglee-ingress.yml
ingress.networking.k8s.io/test-ingress created
[root@k8s-master ingress]# kubectl get ingress
NAME CLASS HOSTS ADDRESS PORTS AGE
myappv1 nginx * 192.168.10.10 80 34s
[root@k8s-master ingress]# curl 192.168.10.50
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
注意:ingress必须和输出的service资源处于同一namespace
5.3 ingress 的高级用法
5.3.1 基于路径的访问
1.建立用于测试的控制器myapp(上面已经做了,如果按照上面做了这个不用弄了)
[root@k8s-master ~]# kubectl create deployment myappv1 --image reg.timinglee.org/library/myapp:v1 --dry-run=client -o yaml > myapp-v1.yml
[root@k8s-master ~]# cp myapp-v1.yml myapp-v2.yml
[root@k8s-master ~]# vim myapp-v2.yml
[root@k8s-master ~]# cat myapp-v1.yml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: myappv1
name: myappv1
spec:
replicas: 1
selector:
matchLabels:
app: myappv1
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: myappv1
spec:
containers:
- image: reg.timinglee.org/library/myapp:v1
name: myapp
resources: {}
status: {}
[root@k8s-master ~]# cat myapp-v2.yml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: myappv2
name: myappv2
spec:
replicas: 1
selector:
matchLabels:
app: myappv2
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: myappv2
spec:
containers:
- image: reg.timinglee.org/library/myapp:v2
name: myapp2
resources: {}
status: {}
[root@k8s-master ~]# kubectl apply -f myapp-v1.yml
deployment.apps/myappv1 created
[root@k8s-master ~]# kubectl apply -f myapp-v2.yml
deployment.apps/myappv2 created
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
myappv1-78ff74589d-mqm6k 1/1 Running 0 11s
myappv2-68578565d8-swgzv 1/1 Running 0 6s[root@k8s-master ~]# kubectl expose deployment myappv1 --port 80 --target-port 80 --dry-run=client -o yaml >> myapp-v1.yml
[root@k8s-master ~]# kubectl expose deployment myappv2 --port 80 --target-port 80 --dry-run=client -o yaml >> myapp-v2.yml[root@k8s-master ~]# vim myapp-v1.yml
[root@k8s-master ~]# vim myapp-v2.yml
[root@k8s-master ~]# cat myapp-v1.yml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: myappv1
name: myappv1
spec:
replicas: 1
selector:
matchLabels:
app: myappv1
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: myappv1
spec:
containers:
- image: reg.timinglee.org/library/myapp:v1
name: myapp
resources: {}
status: {}---
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: myappv1
name: myappv1
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: myappv1
status:
loadBalancer: {}
[root@k8s-master ~]# cat myapp-v2.yml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: myappv2
name: myappv2
spec:
replicas: 1
selector:
matchLabels:
app: myappv2
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: myappv2
spec:
containers:
- image: reg.timinglee.org/library/myapp:v2
name: myapp2
resources: {}
status: {}---
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: myappv2
name: myappv2
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: myappv2
status:
loadBalancer: {}
[root@k8s-master ~]# kubectl apply -f myapp-v1.yml
deployment.apps/myappv1 configured
service/myappv1 created
[root@k8s-master ~]# kubectl apply -f myapp-v2.yml
deployment.apps/myappv2 configured
service/myappv2 created
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
myappv1-78ff74589d-mqm6k 1/1 Running 0 4m59s
myappv2-68578565d8-swgzv 1/1 Running 0 4m54s[root@k8s-master ~]# kubectl get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 31d
myappv1 ClusterIP 10.100.212.4 <none> 80/TCP 45s
myappv2 ClusterIP 10.99.186.84 <none> 80/TCP 40s
2.建立ingress的yaml
[root@k8s-master ingress]# vim ingress.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/rewrite-target: / #访问路径后加任何内容都被定向到/
name: ingress1
spec:
ingressClassName: nginx
rules:
- host: www.timinglee.org
http:
paths:
- backend:
service:
name: myappv1
port:
number: 80
path: /v1
pathType: Prefix- backend:
service:
name: myappv2
port:
number: 80
path: /v2
pathType: Prefix#测试:
[root@k8s-master ingress]# kubectl apply -f ingress.yml
ingress.networking.k8s.io/ingress1 created[root@k8s-master ingress]# echo 192.168.10.50 www.timinglee.org >> /etc/hosts
[root@k8s-master ingress]# curl www.timinglee.org/v1
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
[root@k8s-master ingress]# curl www.timinglee.org/v2
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>#nginx.ingress.kubernetes.io/rewrite-target: / 的功能实现
[root@k8s-master ingress]# curl www.timinglee.org/v2/aaa
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
5.3.2 基于域名的访问
#在测试主机中设定解析
[root@reg ~]# vim /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.130 reg.timinglee.org
192.168.10.50 www.timinglee.org myappv1.timinglee.org myappv2.timinglee.org# 建立基于域名的yml文件
[root@k8s-master ingress]# vim ingress2.yml
[root@k8s-master ingress]# cat ingress2.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/rewrite-target: /
name: ingress2
spec:
ingressClassName: nginx
rules:
- host: myappv1.timinglee.org
http:
paths:
- backend:
service:
name: myappv1
port:
number: 80
path: /
pathType: Prefix- host: myappv2.timinglee.org
http:
paths:
- backend:
service:
name: myappv2
port:
number: 80
path: /
pathType: Prefix#利用文件建立ingress
[root@k8s-master ingress]# kubectl apply -f ingress2.yml
ingress.networking.k8s.io/ingress2 created
[root@k8s-master ingress]# kubectl describe ingress ingress2
Name: ingress2
Labels: <none>
Namespace: default
Address: 192.168.10.10
Ingress Class: nginx
Default backend: <default>
Rules:
Host Path Backends
---- ---- --------
myappv1.timinglee.org
/ myappv1:80 (10.244.1.23:80)
myappv2.timinglee.org
/ myappv2:80 (10.244.2.20:80)
Annotations: nginx.ingress.kubernetes.io/rewrite-target: /
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Sync 30s (x2 over 66s) nginx-ingress-controller Scheduled for sync#在测试主机中测试
[root@reg ~]# curl myappv1.timinglee.org
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
[root@reg ~]# curl myappv2.timinglee.org
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
5.3.3 建立tls加密
#建立证书
[root@k8s-master tls]# openssl req -newkey rsa:2048 -nodes -keyout tls.key -x509 -days 365 -subj "/CN=nginxsvc/O=nginxsvc" -out tls.crt
.....+..+.............+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*..+........+....+..+.+.........+.....+...+.+......+...............+...+.....+.+...........+.+..+...+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*....+...............+..+...+....+..+.+............+..+...............+....+..+.............+.....+....+.....+...+....+...+.....+.+...........+.+..+......+.........+......+.+.........+.....+.......+.....+.......+......+.....+.......+..+......+.+......+..+.+..............+.......+......+..+...+.........+....+.........+..+.+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
....+...............+...+.+..+.......+.....+.+..+.......+...+..+.+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*.........+...+........+.........+...+....+...+.....+......+.......+...+.....+....+...+...+.........+..+...+..........+...+..+......+.........+.+............+..+.......+.....+......+...+.+......+...+..+.......+...+.................+.+..+...+....+......+..+.........+....+...........+.+..+.+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*.+............+..+...+.+......+...........+...+.........+.+...........+...+...+....+.....+.........+....+..+.........+.......+.........+...+...............+...+..+...+...+.+...+...........+......+......+...+....+...+..+.......+...........+..........+..+...+....+.........+.....+....+...........+..........+.....+......+.+..+......+....+.....+...+....+...+..+.........+......+..........+.........+..+..........+..+.+.....+.+.....+.+..................+......+...+..+...+......+..........+...............+.........+........+...+.+...+......+.....+.+......+..............+.........+.+......+.......................+.........+...+....+.........+..............+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-----
#建立加密资源类型secret
[root@k8s-master tls]# ls
tls.crt tls.key
[root@k8s-master tls]# kubectl create secret tls web-tls-secret --key tls.key --cert tls.crt
secret/web-tls-secret created
[root@k8s-master tls]# kubectl get secrets
NAME TYPE DATA AGE
web-tls-secret kubernetes.io/tls 2 12s
注意:
secret通常在kubernetes中存放敏感数据,他并不是一种加密方式,在后面课程中会有专门讲解
#建立ingress3基于tls认证的yml文件
[root@k8s-master tls]# vim ingress3.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/rewrite-target: /
name: ingress3
spec:
tls:
- hosts:
- myapp-tls.timinglee.org
secretName: web-tls-secret
ingressClassName: nginx
rules:
- host: myapp-tls.timinglee.org
http:
paths:
- backend:
service:
name: myappv1
port:
number: 80
path: /
pathType: Prefix
[root@k8s-master tls]# vim /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.10 k8s-node
192.168.10.20 k8s-node2
192.168.10.100 k8s-master
192.168.10.130 reg.timinglee.org
192.168.10.50 www.timinglee.org myapp-tls.timinglee.org[root@k8s-master tls]# kubectl apply -f ingress3.yml
ingress.networking.k8s.io/ingress3 created
#测试
[root@k8s-master tls]# curl -k https://myapp-tls.timinglee.org
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
5.3.4 建立auth认证
#建立认证文件
[root@k8s-master tls]# yum install httpd-tools.x86_64 -y
[root@k8s-master tls]# htpasswd -cm auth lee
New password: #密码是123
Re-type new password:
Adding password for user lee
[root@k8s-master tls]# cat auth
lee:$apr1$BgZiZC5c$UZ559xczgGxU0ejRWypgs0#建立认证类型资源
[root@k8s-master tls]# kubectl create secret generic auth-web --from-file auth
secret/auth-web created
[root@k8s-master tls]# kubectl describe secrets auth-web
Name: auth-web
Namespace: default
Labels: <none>
Annotations: <none>Type: Opaque
Data
====
auth: 42 bytes
#建立ingress4基于用户认证的yaml文件
[root@k8s-master tls]# vim ingress4.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/auth-type: basic
nginx.ingress.kubernetes.io/auth-secret: auth-web
nginx.ingress.kubernetes.io/auth-realm: "Please input username and password"
name: ingress4
spec:
tls:
- hosts:
- myapp-tls.timinglee.org
secretName: web-tls-secret
ingressClassName: nginx
rules:
- host: myapp-tls.timinglee.org
http:
paths:
- backend:
service:
name: myappv1
port:
number: 80
path: /
pathType: Prefix
#建立ingress4[root@k8s-master tls]# kubectl apply -f ingress4.yml
ingress.networking.k8s.io/ingress4 created
[root@k8s-master tls]# kubectl describe ingress ingress4
Name: ingress4
Labels: <none>
Namespace: default
Address:
Ingress Class: nginx
Default backend: <default>
TLS:
web-tls-secret terminates myapp-tls.timinglee.org
Rules:
Host Path Backends
---- ---- --------
myapp-tls.timinglee.org
/ myappv1:80 (10.244.1.23:80)
Annotations: nginx.ingress.kubernetes.io/auth-realm: Please input username and password
nginx.ingress.kubernetes.io/auth-secret: auth-web
nginx.ingress.kubernetes.io/auth-type: basic
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Sync 30s nginx-ingress-controller Scheduled for sync
#测试:[root@k8s-master tls]# vim /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.10 k8s-node
192.168.10.20 k8s-node2
192.168.10.100 k8s-master
192.168.10.130 reg.timinglee.org
192.168.10.50 www.timinglee.org myapp-tls.timinglee.org[root@k8s-master tls]# curl -k https://myapp-tls.timinglee.org
<html>
<head><title>401 Authorization Required</title></head>
<body>
<center><h1>401 Authorization Required</h1></center>
<hr><center>nginx</center>
</body>
</html>[root@k8s-master tls]# curl -k https://myapp-tls.timinglee.org -ulee:123
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
5.3.5 rewrite重定向
#指定默认访问的文件到hostname.html上
[root@k8s-master tls]# vim ingress5.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/app-root: /hostname.html
nginx.ingress.kubernetes.io/auth-type: basic
nginx.ingress.kubernetes.io/auth-secret: auth-web
nginx.ingress.kubernetes.io/auth-realm: "Please input username and password"
name: ingress5
spec:
tls:
- hosts:
- myapp-tls.timinglee.org
secretName: web-tls-secret
ingressClassName: nginx
rules:
- host: myapp-tls.timinglee.org
http:
paths:
- backend:
service:
name: myappv1
port:
number: 80
path: /
pathType: Prefix[root@k8s-master tls]# kubectl apply -f ingress5.yml
ingress.networking.k8s.io/ingress5 created
[root@k8s-master tls]# kubectl describe ingress ingress5
Name: ingress5
Labels: <none>
Namespace: default
Address:
Ingress Class: nginx
Default backend: <default>
TLS:
web-tls-secret terminates myapp-tls.timinglee.org
Rules:
Host Path Backends
---- ---- --------
myapp-tls.timinglee.org
/ myappv1:80 (10.244.1.23:80)
Annotations: nginx.ingress.kubernetes.io/app-root: /hostname.html
nginx.ingress.kubernetes.io/auth-realm: Please input username and password
nginx.ingress.kubernetes.io/auth-secret: auth-web
nginx.ingress.kubernetes.io/auth-type: basic
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Sync 57s nginx-ingress-controller Scheduled for sync
#测试:[root@k8s-master tls]# curl -Lk https://myapp-tls.timinglee.org -ulee:123
myappv1-78ff74589d-mqm6k[root@k8s-master tls]# curl -Lk https://myapp-tls.timinglee.org/hostname.html -ulee:123
myappv1-78ff74589d-mqm6k[root@k8s-master tls]# curl -Lk https://myapp-tls.timinglee.org/lee/hostname.html -ulee:123
<html>
<head><title>404 Not Found</title></head>
<body bgcolor="white">
<center><h1>404 Not Found</h1></center>
<hr><center>nginx/1.12.2</center>
</body>
</html>#解决重定向路径问题
[root@k8s-master tls]# vim ingress6.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/rewrite-target: /$2
nginx.ingress.kubernetes.io/use-regex: "true"
nginx.ingress.kubernetes.io/auth-type: basic
nginx.ingress.kubernetes.io/auth-secret: auth-web
nginx.ingress.kubernetes.io/auth-realm: "Please input username and password"
name: ingress6
spec:
tls:
- hosts:
- myapp-tls.timinglee.org
secretName: web-tls-secret
ingressClassName: nginx
rules:
- host: myapp-tls.timinglee.org
http:
paths:
- backend:
service:
name: myappv1
port:
number: 80
path: /
pathType: Prefix- backend:
service:
name: myappv1
port:
number: 80
path: /lee(/|$)(.*)
pathType: ImplementationSpecific
[root@k8s-master tls]# kubectl apply -f ingress6.yml
ingress.networking.k8s.io/ingress6 created
[root@k8s-master tls]# curl -Lk https://myapp-tls.timinglee.org/lee/hostname.html -ulee:123
myappv1-78ff74589d-mqm6k
六 Canary金丝雀发布
6.1 什么是金丝雀发布
金丝雀发布(Canary Release)也称为灰度发布,是一种软件发布策略。
主要目的是在将新版本的软件全面推广到生产环境之前,先在一小部分用户或服务器上进行测试和验证,以降低因新版本引入重大问题而对整个系统造成的影响。
是一种Pod的发布方式。金丝雀发布采取先添加、再删除的方式,保证Pod的总量不低于期望值。并且在更新部分Pod后,暂停更新,当确认新Pod版本运行正常后再进行其他版本的Pod的更新。
6.2 Canary发布方式
其中header和weiht中的最多
6.2.1 基于header(http包头)灰度
- 通过Annotaion扩展
- 创建灰度ingress,配置灰度头部key以及value
- 灰度流量验证完毕后,切换正式ingress到新版本
- 之前我们在做升级时可以通过控制器做滚动更新,默认25%利用header可以使升级更为平滑,通过key 和vule 测试新的业务体系是否有问题。
示例:
#建立版本1的ingress
[root@k8s-master tls]# vim ingress7.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
name: myapp-v1-ingress
spec:
ingressClassName: nginx
rules:
- host: myapp.timinglee.org
http:
paths:
- backend:
service:
name: myappv1
port:
number: 80
path: /
pathType: Prefix[root@k8s-master tls]# kubectl apply -f ingress7.yml
ingress.networking.k8s.io/myapp-v1-ingress created
[root@k8s-master tls]# kubectl describe ingress myapp-v1-ingress
Name: myapp-v1-ingress
Labels: <none>
Namespace: default
Address:
Ingress Class: nginx
Default backend: <default>
Rules:
Host Path Backends
---- ---- --------
myapp.timinglee.org
/ myappv1:80 (10.244.1.23:80)
Annotations: <none>
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Sync 15s nginx-ingress-controller Scheduled for sync#测试:
[root@k8s-master tls]# curl myapp.timinglee.org
Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
#建立基于header的ingress[root@k8s-master tls]# vim ingress8.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/canary: "true"
nginx.ingress.kubernetes.io/canary-by-header: version
nginx.ingress.kubernetes.io/canary-by-header-value: "2"
name: myapp-v2-ingress
spec:
ingressClassName: nginx
rules:
- host: myapp.timinglee.org
http:
paths:
- backend:
service:
name: myappv2
port:
number: 80
path: /
pathType: Prefix[root@k8s-master tls]# kubectl apply -f ingress8.yml
ingress.networking.k8s.io/myapp-v2-ingress created
[root@k8s-master tls]# kubectl describe ingress myapp-v2-ingress
Name: myapp-v2-ingress
Labels: <none>
Namespace: default
Address: 192.168.10.10
Ingress Class: nginx
Default backend: <default>
Rules:
Host Path Backends
---- ---- --------
myapp.timinglee.org
/ myappv2:80 (10.244.2.20:80)
Annotations: nginx.ingress.kubernetes.io/canary: true
nginx.ingress.kubernetes.io/canary-by-header: version
nginx.ingress.kubernetes.io/canary-by-header-value: 2
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Sync 24s (x2 over 53s) nginx-ingress-controller Scheduled for sync
#测试:[root@k8s-master tls]# curl -H "version: 2" myapp.timinglee.org
Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
6.2.2 基于权重的灰度发布
通过Annotaion拓展
创建灰度ingress,配置灰度权重以及总权重
灰度流量验证完毕后,切换正式ingress到新版本
示例
#基于权重的灰度发布
[root@k8s-master tls]# vim ingress9.yml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/canary: "true"
nginx.ingress.kubernetes.io/canary-weight: "10" #更改权重值
nginx.ingress.kubernetes.io/canary-weight-total: "100"
name: myapp-v2-ingress
spec:
ingressClassName: nginx
rules:
- host: myapp.timinglee.org
http:
paths:
- backend:
service:
name: myappv2
port:
number: 80
path: /
pathType: Prefix[root@k8s-master tls]# kubectl apply -f ingress9.yml
ingress.networking.k8s.io/myapp-v2-ingress created
#测试:[root@k8s-master tls]# vim check_ingress.sh
#!/bin/bash
v1=0
v2=0for (( i=0; i<100; i++))
do
response=`curl -s myapp.timinglee.org |grep -c v1`v1=`expr $v1 + $response`
v2=`expr $v2 + 1 - $response`done
echo "v1:$v1, v2:$v2"
[root@k8s-master tls]# kubectl apply -f ingress7.yml
ingress.networking.k8s.io/myapp-v1-ingress created
[root@k8s-master tls]# kubectl apply -f ingress8.yml
ingress.networking.k8s.io/myapp-v2-ingress configured
[root@k8s-master tls]# kubectl apply -f ingress9.yml
ingress.networking.k8s.io/myapp-v2-ingress configured[root@k8s-master tls]# kubectl get ingress
NAME CLASS HOSTS ADDRESS PORTS AGE
myapp-v1-ingress nginx myapp.timinglee.org 192.168.10.10 80 56s
myapp-v2-ingress nginx myapp.timinglee.org 192.168.10.10 80 8m7s[root@k8s-master tls]# sh check_ingress.sh
v1:93, v2:7
[root@k8s-master tls]# sh check_ingress.sh
v1:88, v2:12
[root@k8s-master tls]# sh check_ingress.sh
v1:92, v2:8
#更改完毕权重后继续测试可观察变化#更改权重值为30
[root@k8s-master tls]# sh check_ingress.sh
v1:69, v2:31
[root@k8s-master tls]# sh check_ingress.sh
v1:68, v2:32
[root@k8s-master tls]# sh check_ingress.sh
v1:74, v2:26
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