Linux - K8S - 網路之LoadBalancer

阿新 • • 發佈：2021-12-11

[19:49:54 root@master1 service]#cat 07-service-LoadBalancer-externalip.yml 
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  type: LoadBalancer
  ports:
  - port: 80
  selector:
    app: my-nginx
  externalIPs:
  - 10.0.0.99
[19:50:01 root@master1 service]#kubectl get pod
NAME                       READY   STATUS    RESTARTS   AGE
my-nginx-7678697fc-dgjwm   1/1     Running   0          11h
my-nginx-7678697fc-lvlsd   1/1     Running   0          11h
my-nginx-7678697fc-nbfx4   1/1     Running   0          11h
my-nginx-7678697fc-tgpjn   1/1     Running   0          11h
[19:50:47 root@master1 service]#kubectl get all
NAME                           READY   STATUS    RESTARTS   AGE
pod/my-nginx-7678697fc-dgjwm   1/1     Running   0          11h
pod/my-nginx-7678697fc-lvlsd   1/1     Running   0          11h
pod/my-nginx-7678697fc-nbfx4   1/1     Running   0          11h
pod/my-nginx-7678697fc-tgpjn   1/1     Running   0          11h

NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   13d

NAME                       READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/my-nginx   4/4     4            4           11h

NAME                                 DESIRED   CURRENT   READY   AGE
replicaset.apps/my-nginx-7678697fc   4         4         4       11h
[19:50:57 root@master1 service]#kubectl apply -f 06-service-LoadBalancer.yml 
service/nginx-service created
[19:52:20 root@master1 service]#kubectl get all
NAME                           READY   STATUS    RESTARTS   AGE
pod/my-nginx-7678697fc-dgjwm   1/1     Running   0          11h
pod/my-nginx-7678697fc-lvlsd   1/1     Running   0          11h
pod/my-nginx-7678697fc-nbfx4   1/1     Running   0          11h
pod/my-nginx-7678697fc-tgpjn   1/1     Running   0          11h

NAME                    TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
service/kubernetes      ClusterIP      10.96.0.1        <none>        443/TCP        13d
service/nginx-service   LoadBalancer   10.104.200.153   <pending>     80:31935/TCP   5s

NAME                       READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/my-nginx   4/4     4            4           11h

NAME                                 DESIRED   CURRENT   READY   AGE
replicaset.apps/my-nginx-7678697fc   4         4         4       11h


# 其他機器訪問
[19:52:43 root@hakeepalvied2 ~]#curl 10.0.0.50:31935
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-nbfx4, ServerIP: 10.244.3.38!
[19:52:57 root@hakeepalvied2 ~]#curl 10.0.0.50:31935
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[19:52:58 root@hakeepalvied2 ~]#curl 10.0.0.50:31935
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-tgpjn, ServerIP: 10.244.4.76!
[19:52:59 root@hakeepalvied2 ~]#curl 10.0.0.50:31935
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-tgpjn, ServerIP: 10.244.4.76!
[19:52:59 root@hakeepalvied2 ~]#curl 10.0.0.50:31935
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[19:52:59 root@hakeepalvied2 ~]#curl 10.0.0.50:31935
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-tgpjn, ServerIP: 10.244.4.76!
[19:53:00 root@hakeepalvied2 ~]#curl 10.0.0.50:31935
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-lvlsd, ServerIP: 10.244.3.39!
[19:53:00 root@hakeepalvied2 ~]#curl 10.0.0.50:31935
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-tgpjn, ServerIP: 10.244.4.76!

# 新增externalIP

[19:55:20 root@master1 service]#cat 07-service-LoadBalancer-externalip.yml 
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  type: LoadBalancer
  ports:
  - port: 80
  selector:
    app: my-nginx
  externalIPs:
  - 10.0.0.99
[19:55:22 root@master1 service]#kubectl apply -f 07-service-LoadBalancer-externalip.yml 
service/nginx-service created
[20:01:44 root@master1 service]#kubectl get all
NAME                           READY   STATUS    RESTARTS   AGE
pod/my-nginx-7678697fc-dgjwm   1/1     Running   0          11h
pod/my-nginx-7678697fc-lvlsd   1/1     Running   0          11h
pod/my-nginx-7678697fc-nbfx4   1/1     Running   0          11h
pod/my-nginx-7678697fc-tgpjn   1/1     Running   0          11h

NAME                    TYPE           CLUSTER-IP    EXTERNAL-IP   PORT(S)        AGE
service/kubernetes      ClusterIP      10.96.0.1     <none>        443/TCP        13d
service/nginx-service   LoadBalancer   10.110.2.86   10.0.0.99     80:30048/TCP   2m14s

NAME                       READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/my-nginx   4/4     4            4           11h

NAME                                 DESIRED   CURRENT   READY   AGE
replicaset.apps/my-nginx-7678697fc   4         4         4       11h

# 非叢集機器訪問 - 由於externalIP一般是公網,此次將模擬公網IP

[20:03:04 root@hakeepalvied2 ~]#ifconfig eth0:1 10.0.0.99 netmask 255.255.255.0
[20:03:11 root@hakeepalvied2 ~]#ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.0.57  netmask 255.255.255.0  broadcast 10.0.0.255
        inet6 fe80::20c:29ff:fed5:8871  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:d5:88:71  txqueuelen 1000  (Ethernet)
        RX packets 52558  bytes 11333545 (11.3 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3897  bytes 280765 (280.7 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth0:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.0.99  netmask 255.255.255.0  broadcast 10.0.0.255
        ether 00:0c:29:d5:88:71  txqueuelen 1000  (Ethernet)

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 46  bytes 4410 (4.4 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 46  bytes 4410 (4.4 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


[20:03:51 root@master1 service]#curl 10.0.0.99
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:03:51 root@master1 service]#curl 10.0.0.99
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-nbfx4, ServerIP: 10.244.3.38!
[20:03:54 root@master1 service]#curl 10.0.0.99
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-nbfx4, ServerIP: 10.244.3.38!
[20:03:54 root@master1 service]#curl 10.0.0.99
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-nbfx4, ServerIP: 10.244.3.38!
[20:03:57 root@master1 service]#curl 10.0.0.99
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:03:57 root@master1 service]#curl 10.0.0.99
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-lvlsd, ServerIP: 10.244.3.39!
[20:03:58 root@master1 service]#curl 10.0.0.99
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-tgpjn, ServerIP: 10.244.4.76!
[20:03:58 root@master1 service]#curl 10.0.0.99
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-lvlsd, ServerIP: 10.244.3.39!

# 繫結clientIP，類似nginx的源地址hash

[20:08:54 root@master1 service]#cat 08-service-session.yaml 
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  type: LoadBalancer
  ports:
  - port: 80
  selector:
    app: my-nginx
  sessionAffinity: ClientIP


[20:09:05 root@master1 service]#kubectl apply -f 08-service-session.yaml 
service/nginx-service created
[20:09:26 root@master1 service]#kubectl get all
NAME                           READY   STATUS    RESTARTS   AGE
pod/my-nginx-7678697fc-dgjwm   1/1     Running   0          11h
pod/my-nginx-7678697fc-lvlsd   1/1     Running   0          11h
pod/my-nginx-7678697fc-nbfx4   1/1     Running   0          11h
pod/my-nginx-7678697fc-tgpjn   1/1     Running   0          11h

NAME                    TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
service/kubernetes      ClusterIP      10.96.0.1       <none>        443/TCP        13d
service/nginx-service   LoadBalancer   10.111.249.42   <pending>     80:30984/TCP   5s

NAME                       READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/my-nginx   4/4     4            4           11h

NAME                                 DESIRED   CURRENT   READY   AGE
replicaset.apps/my-nginx-7678697fc   4         4         4       11h
[20:09:31 root@master1 service]#curl 10.111.249.42
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:09:44 root@master1 service]#curl 10.0.0.50:300984
curl: (3) Port number out of range
[20:09:52 root@master1 service]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:09:57 root@master1 service]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:09:58 root@master1 service]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:09:59 root@master1 service]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:10:00 root@master1 service]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:10:00 root@master1 service]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!
[20:10:01 root@master1 service]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-dgjwm, ServerIP: 10.244.4.77!

# 在其他機器訪問
[20:08:46 root@hakeepalvied2 ~]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-lvlsd, ServerIP: 10.244.3.39!
[20:10:14 root@hakeepalvied2 ~]#curl 10.0.0.50:30984
kubernetes pod-test v0.1!! ClientIP: 10.0.0.50, ServerName: my-nginx-7678697fc-lvlsd, ServerIP: 10.244.3.39!

# 無頭服務
[20:12:21 root@master1 service]#cat 09-service-headless.yaml 
apiVersion: v1
kind: Service
metadata:
  name: service-headless
spec:
  selector:
    app: my-nginx
  clusterIP: "None"
[20:12:25 root@master1 service]#kubectl apply -f 09-service-headless.yaml 
service/service-headless created
[20:12:40 root@master1 service]#kubectl get all
NAME                           READY   STATUS    RESTARTS   AGE
pod/my-nginx-7678697fc-dgjwm   1/1     Running   0          11h
pod/my-nginx-7678697fc-lvlsd   1/1     Running   0          11h
pod/my-nginx-7678697fc-nbfx4   1/1     Running   0          11h
pod/my-nginx-7678697fc-tgpjn   1/1     Running   0          11h

NAME                       TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes         ClusterIP   10.96.0.1    <none>        443/TCP   13d
service/service-headless   ClusterIP   None         <none>        <none>    6s

NAME                       READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/my-nginx   4/4     4            4           11h

NAME                                 DESIRED   CURRENT   READY   AGE
replicaset.apps/my-nginx-7678697fc   4         4         4       11h


# 進入其中一個pod檢視
[20:16:19 root@master1 service]#kubectl exec -it my-nginx-7678697fc-dgjwm -- sh
[root@my-nginx-7678697fc-dgjwm /]# nslookup 10.244.4.77
77.4.244.10.in-addr.arpa	name = 10-244-4-77.service-headless.default.svc.cluster.local.

[root@my-nginx-7678697fc-dgjwm /]# nslookup -query=A service-headless.default.svc.cluster.local.
Server:		10.96.0.10
Address:	10.96.0.10#53

Name:	service-headless.default.svc.cluster.local
Address: 10.244.3.38
Name:	service-headless.default.svc.cluster.local
Address: 10.244.4.77
Name:	service-headless.default.svc.cluster.local
Address: 10.244.3.39
Name:	service-headless.default.svc.cluster.local
Address: 10.244.4.76

# 由此看出，每個都有自己的A記錄，可以通過DNS域彼此通訊

Linux - K8S - 網路之LoadBalancer

[19:49:54 root@master1 service]#cat 07-service-LoadBalancer-externalip.yml apiVersion: v1 kind: Service

k8s網路之Flannel網路

一簡介 Flannel是CoreOS團隊針對Kubernetes設計的一個網路規劃服務，簡單來說，它的功能是讓叢集中的不同節點主機建立的Docker容器都具有全叢集唯一的虛擬IP地址。

k8s網路之Calico網路

一，簡介 Calico是一種容器之間互通的網路方案。在虛擬化平臺中，比如OpenStack、Docker等都需要實現workloads之間互連，但同時也需要對容器做隔離控制，就像在Internet中的服務僅開放80埠、公有云的多租戶一樣，提

網路虛擬化之linux虛擬網路基礎

1 linux虛擬網路基礎 1.1 Device 在linux裡面devic(裝置)與傳統網路概念裡的物理裝置(如交換機、路由器)不同，Linux所說的裝置，其背後指的是一個類似於資料結構、核心模組或裝置驅動這樣的含義。就是說device可能只

Linux虛擬網路：Docker網路知識之基礎篇

我們在工作中應用了docker容器化技術，服務的部署、維護和擴充套件都方便了很多。然而，近期在私有化部署過程中，由於不同伺服器環境的複雜多變，常常遇到網路方面的問題，現象為容器服務執行正常，但宿主機、容器之

【轉】Linux虛擬網路裝置之tun/tap

原文：https://segmentfault.com/a/1190000009249039 —————————————————————&md

Linux故障排查之磁碟IO、網路佔用高

CPU、記憶體使用率檢視命令我們也許用過很多次了，那麼今天我們就說點不一樣的，看下怎麼檢視磁碟IO和網路佔用高問題。

Linux - K8S - 安全機制之SA和UA

# 3.安全機制 ## 3.1 SA ```sh # 建立測試SA，我們發現一個SA有相對應的secrets [19:25:06 root@master1 security]#kubectl create -f - <<EOF

Linux常用命令之網路和關機重啟命令

網路命令（1）給指定使用者傳送資訊：write 功能描述：給指定使用者傳送資訊，以Ctrl+D 儲存結束

Linux學習教程之redis哨兵叢集詳解

前言 Sentinel(哨兵)是用於監控redis叢集中Master狀態的工具，其已經被整合在redis2.4+的版本中，下面話不多說了，來一起看看詳細的介紹吧

Linux操作篇之配置DNS服务（一）

一、什么是DN。　　域名（Domain Name）又称网域，是由一串用点分隔的名字组成的Internet上某一台计算机或计算机组的名称，用于在数据传输时对计算机的定位标识（有时也指地理位置）。它的作用只是为了便于人们对网

Linux操作篇之配置DNS服務（一）

一、什麼是DN。　　域名（Domain Name）又稱網域，是由一串用點分隔的名字組成的Internet上某一臺計算機或計算機組的名稱，用於在資料傳輸時對計算機的定位標識（有時也指地理位置）。它的作用只是為了便於人們對網

技術乾貨丨卷積神經網路之LeNet-5遷移實踐案例

摘要：LeNet-5是Yann LeCun在1998年設計的用於手寫數字識別的卷積神經網路，當年美國大多數銀行就是用它來識別支票上面的手寫數字的，它是早期卷積神經網路中最有代表性的實驗系統之一。可以說，LeNet-5就相當於程式

01 Linux小工具之tmux

什麼是tmux 我們在Linux伺服器上的工作一般都是通過一個遠端的終端連線軟體連線到遠端系統進行操作，例如使用xshell或者Xshell工具通過ssh進行遠端連線。在使用過程中，如果要做比較耗時的操作，例如有時候進行編譯，

Linux Shell 一之shell初識

一、什麼是Shell Shell 是一個用 C 語言編寫的程式，它是使用者使用 Linux 的橋樑。Shell 既是一種命令語言，又是一種程式設計語言。

Linux Shell 二之 Shell變數

Shell 變數定義變數時，變數名不加美元符號（$，PHP語言中變數需要），如： your_name=\"runoob.com\"

Linux-uboot命令之EXT格式檔案系統操作命令

一、EXT格式檔案系統操作命令　　uboot有ext2和ext4這兩種格式的檔案系統的操作命令，常用的就四個命令，分別是：ext2load、ext2ls、ext4load、ext4ls和ext4write。這些命令的含義和使用與fatload、fatls和fatwrite

Linux Shell 四之 Shell 基本運算子

一、Shell 和其他程式語言一樣，支援多種運算子，包括：算數運算子關係運算符

05 . k8s實戰之部署PHP/JAVA網站

傳統部署和k8s部署區別通常使用傳統的部署的時候，我們一個web專案，網站的搭建，往往使用的如下的一種整體架構，可能有的公司在某一環節使用的東西是不一樣，但是大體的框架流程是都是差不多的

Linux 字元處理之【grep】

引數： -i: 不區分大小寫 -c: 統計包含匹配的行數 -n: 輸出行號 -v: 反向匹配示例檔案： (example.txt)

Linux - K8S - 網路之LoadBalancer

相關推薦