k8s实战案例之运行Java单体服务-jenkins
Jenkins通过k8s上的pv/pvc来连接外部存储，通过svc的方式向外暴露服务，在集群内部通过直接访问svc就可以正常访问到jenkins，对于集群外部成员，通过外部负载均衡器来访问Jenkins；
1、jenkins架构
基于java命令，运⾏java war包或jar包，本次以jenkins.war 包部署⽅式为例，且要求jenkins的数据保存⾄外部存储(NFS或者PVC)，其他java应⽤看实际需求是否需要将数据保存⾄外部存储。
从上述架构图可以看到，Jenkins通过k8s上的pv/pvc来连接外部存储，通过svc的方式向外暴露服务，在集群内部通过直接访问svc就可以正常访问到jenkins，对于集群外部成员，通过外部负载均衡器来访问Jenkins；
2、镜像准备
2.1、Jenkins镜像目录文件
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/jenkins# tree
.
├── Dockerfile
├── build-command.sh
├── jenkins-2.319.2.war
└── run_jenkins.sh
0 directories, 4 files
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/jenkins#
2.2、构建Jenkins镜像
2.2.1、构建Jenkins镜像Dockerfile
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/jenkins# cat Dockerfile
#Jenkins Version 2.190.1
FROM harbor.ik8s.cc/pub-images/jdk-base:v8.212
ADD jenkins-2.319.2.war /apps/jenkins/jenkins.war
ADD run_jenkins.sh /usr/bin/
EXPOSE 8080
CMD ["/usr/bin/run_jenkins.sh"]
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/jenkins#
上述Dockerfile主要引用了一个jdk-base的镜像，该镜像有java环境，然后再这基础之上将jenkins war包和运行脚本加进去，然后暴露8080端口，最后给出运行jenkins的cmd命令；
2.2.2、运行jenkins 脚本
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/jenkins# cat run_jenkins.sh
#!/bin/bash
cd /apps/jenkins && java -server -Xms1024m -Xmx1024m -Xss512k -jar jenkins.war --webroot=/apps/jenkins/jenkins-data --httpPort=8080
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/jenkins#
2.2.3、构建Jenkins镜像脚本
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/jenkins# cat build-command.sh
#!/bin/bash
#docker build -t harbor.ik8s.cc/magedu/jenkins:v2.319.2 .
#echo "镜像制作完成，即将上传至Harbor服务器"
#sleep 1
#docker push harbor.ik8s.cc/magedu/jenkins:v2.319.2
#echo "镜像上传完成"
echo "即将开始就像构建,请稍等!" && echo 3 && sleep 1 && echo 2 && sleep 1 && echo 1
nerdctl build -t harbor.ik8s.cc/magedu/jenkins:v2.319.2 .
if [ $? -eq 0 ];then
echo "即将开始镜像上传,请稍等!" && echo 3 && sleep 1 && echo 2 && sleep 1 && echo 1
nerdctl push harbor.ik8s.cc/magedu/jenkins:v2.319.2
if [ $? -eq 0 ];then
echo "镜像上传成功!"
else
echo "镜像上传失败"
fi
else
echo "镜像构建失败,请检查构建输出信息!"
fi
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/jenkins#
运行脚本构建镜像
2.3、验证Jenkins镜像
2.3.1、在harbor上查看对应jenkins镜像是否正常上传？
2.3.2、测试Jenkins镜像是否可以正常运行？
2.3.3、web访问jenkins是否可以正常访问？
能够看到上述页面，说明jenkins镜像制作没有问题;
3、准备PV/PVC
3.1、在nfs服务器上准备jenkins数据目录
root@harbor:~# mkdir -p /data/k8sdata/magedu/{jenkins-data,jenkins-root-data}
root@harbor:~# ll /data/k8sdata/magedu/{jenkins-data,jenkins-root-data}
/data/k8sdata/magedu/jenkins-data:
total 8
drwxr-xr-x 2 root root 4096 Aug 6 03:35 ./
drwxr-xr-x 21 root root 4096 Aug 6 03:35 ../
/data/k8sdata/magedu/jenkins-root-data:
total 8
drwxr-xr-x 2 root root 4096 Aug 6 03:35 ./
drwxr-xr-x 21 root root 4096 Aug 6 03:35 ../
root@harbor:~# tail /etc/exports
/data/k8sdata/magedu/mysql-datadir-1 *(rw,no_root_squash)
/data/k8sdata/magedu/mysql-datadir-2 *(rw,no_root_squash)
/data/k8sdata/magedu/mysql-datadir-3 *(rw,no_root_squash)
/data/k8sdata/magedu/mysql-datadir-4 *(rw,no_root_squash)
/data/k8sdata/magedu/mysql-datadir-5 *(rw,no_root_squash)
/data/k8sdata/magedu/jenkins-data *(rw,no_root_squash)
/data/k8sdata/magedu/jenkins-root-data *(rw,no_root_squash)
root@harbor:~# exportfs -av
exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/kuboard".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [2]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/volumes".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [3]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/pod-vol".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [4]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/myserver".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [5]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/mysite".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [7]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/images".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [8]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/static".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [11]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/zookeeper-datadir-1".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [12]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/zookeeper-datadir-2".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [13]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/zookeeper-datadir-3".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [16]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/redis-datadir-1".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [18]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/redis0".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [19]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/redis1".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [20]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/redis2".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [21]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/redis3".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [22]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/redis4".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [23]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/redis5".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [27]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/mysql-datadir-1".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [28]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/mysql-datadir-2".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [29]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/mysql-datadir-3".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [30]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/mysql-datadir-4".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [31]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/mysql-datadir-5".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [34]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/jenkins-data".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exportfs: /etc/exports [35]: Neither 'subtree_check' or 'no_subtree_check' specified for export "*:/data/k8sdata/magedu/jenkins-root-data".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x
exporting *:/data/k8sdata/magedu/jenkins-root-data
exporting *:/data/k8sdata/magedu/jenkins-data
exporting *:/data/k8sdata/magedu/mysql-datadir-5
exporting *:/data/k8sdata/magedu/mysql-datadir-4
exporting *:/data/k8sdata/magedu/mysql-datadir-3
exporting *:/data/k8sdata/magedu/mysql-datadir-2
exporting *:/data/k8sdata/magedu/mysql-datadir-1
exporting *:/data/k8sdata/magedu/redis5
exporting *:/data/k8sdata/magedu/redis4
exporting *:/data/k8sdata/magedu/redis3
exporting *:/data/k8sdata/magedu/redis2
exporting *:/data/k8sdata/magedu/redis1
exporting *:/data/k8sdata/magedu/redis0
exporting *:/data/k8sdata/magedu/redis-datadir-1
exporting *:/data/k8sdata/magedu/zookeeper-datadir-3
exporting *:/data/k8sdata/magedu/zookeeper-datadir-2
exporting *:/data/k8sdata/magedu/zookeeper-datadir-1
exporting *:/data/k8sdata/magedu/static
exporting *:/data/k8sdata/magedu/images
exporting *:/data/k8sdata/mysite
exporting *:/data/k8sdata/myserver
exporting *:/pod-vol
exporting *:/data/volumes
exporting *:/data/k8sdata/kuboard
root@harbor:~#
3.2、在k8s上创建pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: jenkins-datadir-pv
namespace: magedu
spec:
capacity:
storage: 100Gi
accessModes:
- ReadWriteOnce
nfs:
server: 192.168.0.42
path: /data/k8sdata/magedu/jenkins-data
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: jenkins-root-datadir-pv
namespace: magedu
spec:
capacity:
storage: 100Gi
accessModes:
- ReadWriteOnce
nfs:
server: 192.168.0.42
path: /data/k8sdata/magedu/jenkins-root-data
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins/pv# kubectl apply -f jenkins-persistentvolume.yaml
persistentvolume/jenkins-datadir-pv created
persistentvolume/jenkins-root-datadir-pv created
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins/pv#
3.3、验证pv
3.4、在k8s上创建pvc
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: jenkins-datadir-pvc
namespace: magedu
spec:
volumeName: jenkins-datadir-pv
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 80Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: jenkins-root-data-pvc
namespace: magedu
spec:
volumeName: jenkins-root-datadir-pv
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 80Gi
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins/pv# kubectl apply -f jenkins-persistentvolumeclaim.yaml
persistentvolumeclaim/jenkins-datadir-pvc created
persistentvolumeclaim/jenkins-root-data-pvc created
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins/pv#
3.5、验证pvc
4、准备在k8s上运行jenkins的yaml文件
kind: Deployment
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
metadata:
labels:
app: magedu-jenkins
name: magedu-jenkins-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels:
app: magedu-jenkins
template:
metadata:
labels:
app: magedu-jenkins
spec:
containers:
- name: magedu-jenkins-container
image: harbor.ik8s.cc/magedu/jenkins:v2.319.2
#imagePullPolicy: IfNotPresent
imagePullPolicy: Always
ports:
- containerPort: 8080
protocol: TCP
name: http
volumeMounts:
- mountPath: "/apps/jenkins/jenkins-data/"
name: jenkins-datadir-magedu
- mountPath: "/root/.jenkins"
name: jenkins-root-datadir
volumes:
- name: jenkins-datadir-magedu
persistentVolumeClaim:
claimName: jenkins-datadir-pvc
- name: jenkins-root-datadir
persistentVolumeClaim:
claimName: jenkins-root-data-pvc
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-jenkins
name: magedu-jenkins-service
namespace: magedu
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 8080
nodePort: 38080
selector:
app: magedu-jenkins
5、应用配置清单运行Jenkins
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins# kubectl apply -f jenkins.yaml
deployment.apps/magedu-jenkins-deployment created
service/magedu-jenkins-service created
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins#
6、验证
6.1、验证Jenkins Pod是否正常运行？
6.2、验证web访问jenkins是否可正常访问？
查看jenkins密码
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins# kubectl get pods -n magedu
NAME READY STATUS RESTARTS AGE
magedu-jenkins-deployment-5f6899db-zn4xg 1/1 Running 0 11m
magedu-nginx-deployment-5589bbf4bc-6gd2w 1/1 Running 12 (107m ago) 62d
magedu-tomcat-app1-deployment-7754c8549c-c7rtb 1/1 Running 6 (108m ago) 62d
magedu-tomcat-app1-deployment-7754c8549c-prglk 1/1 Running 6 (108m ago) 62d
mysql-0 2/2 Running 4 (108m ago) 51d
mysql-1 2/2 Running 4 (108m ago) 51d
mysql-2 2/2 Running 4 (108m ago) 51d
redis-0 1/1 Running 4 (108m ago) 60d
redis-1 1/1 Running 4 (108m ago) 60d
redis-2 1/1 Running 4 (108m ago) 60d
redis-3 1/1 Running 4 (108m ago) 60d
redis-4 1/1 Running 4 (108m ago) 60d
redis-5 1/1 Running 4 (108m ago) 60d
ubuntu1804 0/1 Completed 0 60d
zookeeper1-675c5477cb-vmwwq 1/1 Running 6 (108m ago) 62d
zookeeper2-759fb6c6f-7jktr 1/1 Running 6 (108m ago) 62d
zookeeper3-5c78bb5974-vxpbh 1/1 Running 6 (108m ago) 62d
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins# kubectl exec -it magedu-jenkins-deployment-5f6899db-zn4xg -n magedu cat /root/.jenkins/secrets/initialAdminPassword
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
8c4a17a8ecfe4fb88ed8701cb18340df
root@k8s-master01:~/k8s-data/yaml/magedu/jenkins#
ok，能够通过web网页正常访问到jenkins pod，到此jenkins服务就正常运行至k8s上了；后续可以通过外部负载均衡器将jenkins发布到集群外部成员访问；
7、在外部负载均衡器上发布jenkins
ha01
root@k8s-ha01:~# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface ens160
garp_master_delay 10
smtp_alert
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.111 dev ens160 label ens160:0
192.168.0.112 dev ens160 label ens160:1
}
}
root@k8s-ha01:~# cat /etc/haproxy/haproxy.cfg
global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
stats timeout 30s
user haproxy
group haproxy
daemon
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private
# See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
listen k8s_apiserver_6443
bind 192.168.0.111:6443
mode tcp
#balance leastconn
server k8s-master01 192.168.0.31:6443 check inter 2000 fall 3 rise 5
server k8s-master02 192.168.0.32:6443 check inter 2000 fall 3 rise 5
server k8s-master03 192.168.0.33:6443 check inter 2000 fall 3 rise 5
listen jenkins_80
bind 192.168.0.112:80
mode tcp
server k8s-node01 192.168.0.34:38080 check inter 2000 fall 3 rise 5
server k8s-node02 192.168.0.35:38080 check inter 2000 fall 3 rise 5
server k8s-node03 192.168.0.36:38080 check inter 2000 fall 3 rise 5
root@k8s-ha01:~# systemctl restart keepalived haproxy
root@k8s-ha01:~# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 4096 192.168.0.111:6443 0.0.0.0:*
LISTEN 0 4096 192.168.0.112:80 0.0.0.0:*
LISTEN 0 4096 127.0.0.53%lo:53 0.0.0.0:*
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
root@k8s-ha01:~#
ha02
root@k8s-ha02:~# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface ens160
garp_master_delay 10
smtp_alert
virtual_router_id 51
priority 70
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.111 dev ens160 label ens160:0
192.168.0.112 dev ens160 label ens160:1
}
}
root@k8s-ha02:~# cat /etc/haproxy/haproxy.cfg
global
log /dev/log local0
log /dev/log local1 notice
chroot /var/lib/haproxy
stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
stats timeout 30s
user haproxy
group haproxy
daemon
# Default SSL material locations
ca-base /etc/ssl/certs
crt-base /etc/ssl/private
# See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 5000
timeout client 50000
timeout server 50000
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
listen k8s_apiserver_6443
bind 192.168.0.111:6443
mode tcp
#balance leastconn
server k8s-master01 192.168.0.31:6443 check inter 2000 fall 3 rise 5
server k8s-master02 192.168.0.32:6443 check inter 2000 fall 3 rise 5
server k8s-master03 192.168.0.33:6443 check inter 2000 fall 3 rise 5
listen jenkins_80
bind 192.168.0.112:80
mode tcp
server k8s-node01 192.168.0.34:38080 check inter 2000 fall 3 rise 5
server k8s-node02 192.168.0.35:38080 check inter 2000 fall 3 rise 5
server k8s-node03 192.168.0.36:38080 check inter 2000 fall 3 rise 5
root@k8s-ha02:~# systemctl restart keepalived haproxy
root@k8s-ha02:~#
root@k8s-ha02:~# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 4096 192.168.0.111:6443 0.0.0.0:*
LISTEN 0 4096 192.168.0.112:80 0.0.0.0:*
LISTEN 0 4096 127.0.0.53%lo:53 0.0.0.0:*
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
root@k8s-ha02:~#
7.1、访问负载均衡器的vip，看看是否能够访问到jenkins ?
能够正常通过访问负载均衡器的vip访问到jenkins，说明jenkins服务正常被负载均衡器反代成功；
作者：Linux-1874
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