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下文给大家带来kubernetes二进制负载均衡部署如何实现,希望能够给大家在实际运用中带来一定的帮助,负载均衡涉及的东西比较多,理论也不多,网上有很多书籍,今天我们就用创新互联在行业内累计的经验来做一个解答。
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负载均衡
Nginx1:192.168.35.104/24
Nginx2:192.168.35.105/24
Master节点
master1:192.168.35.100/24
master2:192.168.35.103/24
Node节点
node1:192.168.35.101/24
node2:192.168.35.102/24
[root@localhost ~]# systemctl stop firewalld.service
[root@localhost ~]# setenforce 0
[root@localhost ~]# ls
anaconda-ks.cfg keepalived.conf 公共 视频 文档 音乐
initial-setup-ks.cfg nginx.sh 模板 图片 下载 桌面
[root@localhost ~]# vim nginx.sh
cat > /etc/yum.repos.d/nginx.repo << EOF
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0 #复制四行内容
EOF
stream {
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 10.0.0.3:6443;
server 10.0.0.8:6443;
}
server {
listen 6443;
proxy_pass k8s-apiserver;
}
}
[root@localhost ~]# vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
[root@localhost ~]# yum list
[root@localhost ~]# yum install nginx -y
[root@localhost ~]# vim nginx.sh
cat > /etc/yum.repos.d/nginx.repo << EOF
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
EOF
stream {
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 10.0.0.3:6443;
server 10.0.0.8:6443;
}
server {
listen 6443;
proxy_pass k8s-apiserver;
}
} #复制此段内容
[root@localhost ~]# vim /etc/nginx/nginx.conf
user nginx;
worker_processes 1;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
worker_connections 1024;
}
stream {
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 192.168.35.100:6443;
server 192.168.35.103:6443; #只需修改IP为master1和master2的地址
}
server {
listen 6443;
proxy_pass k8s-apiserver;
}
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
#tcp_nopush on;
keepalive_timeout 65;
#gzip on;
include /etc/nginx/conf.d/*.conf;
}
[root@localhost ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
[root@localhost ~]# cd /usr/share/nginx/html/
[root@localhost html]# ls
50x.html index.html
[root@localhost html]# vim index.html
/14 Welcome to master ginx!
[root@localhost ~]# cd /usr/share/nginx/html/
[root@localhost html]# ls
50x.html index.html
[root@localhost html]# vim index.html
/14 Welcome to backup ginx!
[root@localhost ~]# systemctl start nginx
[root@localhost ~]# systemctl start nginx
[root@localhost ~]# yum install keepalived -y
[root@localhost ~]# ls
anaconda-ks.cfg keepalived.conf 公共 视频 文档 音乐
initial-setup-ks.cfg nginx.sh 模板 图片 下载 桌面
[root@localhost ~]# cp keepalived.conf /etc/keepalived/keepalived.conf
cp:是否覆盖"/etc/keepalived/keepalived.conf"? yes
[root@localhost ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
# 邮件发送地址
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/nginx/check_nginx.sh"
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51 # VRRP 路由 ID实例,每个实例是唯一的
priority 100 # 优先级,备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间,默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.35.200/24
}
track_script {
check_nginx
}
}
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
# 邮件发送地址
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/nginx/check_nginx.sh"
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51 # VRRP 路由 ID实例,每个实例是唯一的
priority 90 # 优先级,备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间,默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.35.200/24
}
track_script {
check_nginx
}
}
[root@localhost ~]# vim /etc/nginx/check_nginx.sh
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")
if [ "$count" -eq 0 ];then
systemctl stop keepalived
fi
[root@localhost ~]# chmod +x /etc/nginx/check_nginx.sh
[root@localhost ~]# systemctl start keepalived
[root@localhost ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:ba:e6:18 brd ff:ff:ff:ff:ff:ff
inet 192.168.35.104/24 brd 192.168.35.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.35.200/24 scope global secondary ens33 #漂移地址在lb01中
valid_lft forever preferred_lft forever
inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: virbr0: mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
[root@localhost ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:1d:ec:b0 brd ff:ff:ff:ff:ff:ff
inet 192.168.35.105/24 brd 192.168.35.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: virbr0: mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
[root@localhost ~]# pkill nginx
[root@localhost ~]# systemctl status nginx
● nginx.service - nginx - high performance web server
Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
Active: failed (Result: exit-code) since 六 2020-02-08 16:54:45 CST; 11s ago
Docs: http://nginx.org/en/docs/
Process: 13156 ExecStop=/bin/kill -s TERM $MAINPID (code=exited, status=1/FAILURE)
Main PID: 6930 (code=exited, status=0/SUCCESS)
2月 08 16:54:45 localhost.localdomain kill[13156]: -q, --queue <信号> …2)
2月 08 16:54:45 localhost.localdomain kill[13156]: -p, --pid …号
2月 08 16:54:45 localhost.localdomain kill[13156]: -l, --list [=<信号>] …称
2月 08 16:54:45 localhost.localdomain kill[13156]: -L, --table …值
2月 08 16:54:45 localhost.localdomain kill[13156]: -h, --help 显示此…出
2月 08 16:54:45 localhost.localdomain kill[13156]: -V, --version 输出版…出
2月 08 16:54:45 localhost.localdomain kill[13156]: 更多信息请参阅 kill(1)。
2月 08 16:54:45 localhost.localdomain systemd[1]: nginx.service: control...
2月 08 16:54:45 localhost.localdomain systemd[1]: Unit nginx.service ent...
2月 08 16:54:45 localhost.localdomain systemd[1]: nginx.service failed.
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost ~]# systemctl status keepalived.service #keepalived服务也随之关闭,说明nginx中的check_nginx.sh生效
● keepalived.service - LVS and VRRP High Availability Monitor
Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
Active: inactive (dead)
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: VRRP_Instan...
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: Sending gra...
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: Sending gra...
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: Sending gra...
2月 08 16:39:26 localhost.localdomain Keepalived_vrrp[7319]: Sending gra...
2月 08 16:54:46 localhost.localdomain Keepalived[7317]: Stopping
2月 08 16:54:46 localhost.localdomain systemd[1]: Stopping LVS and VRRP ...
2月 08 16:54:46 localhost.localdomain Keepalived_vrrp[7319]: VRRP_Instan...
2月 08 16:54:46 localhost.localdomain Keepalived_vrrp[7319]: VRRP_Instan...
2月 08 16:54:47 localhost.localdomain systemd[1]: Stopped LVS and VRRP H...
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:ba:e6:18 brd ff:ff:ff:ff:ff:ff
inet 192.168.35.104/24 brd 192.168.35.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: virbr0: mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
[root@localhost ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:1d:ec:b0 brd ff:ff:ff:ff:ff:ff
inet 192.168.35.105/24 brd 192.168.35.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.35.200/24 scope global secondary ens33 #漂移地址转移到lb02中
valid_lft forever preferred_lft forever
inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: virbr0: mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
[root@localhost ~]# systemctl start nginx
[root@localhost ~]# systemctl start keepalived.service
[root@localhost ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:ba:e6:18 brd ff:ff:ff:ff:ff:ff
inet 192.168.35.104/24 brd 192.168.35.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.35.200/24 scope global secondary ens33 #漂移地址又转移回lb01中
valid_lft forever preferred_lft forever
inet6 fe80::6ec5:6d7:1b18:466e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::2a3:b621:ca01:463e/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::d4e2:ef9e:6820:145a/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: virbr0: mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:14:39:99 brd ff:ff:ff:ff:ff:ff
[root@localhost ~]# cat /usr/share/nginx/html/index.html
Welcome to nginx!
Welcome to master ginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.
For online documentation and support please refer to
nginx.org.
Commercial support is available at
nginx.com.
Thank you for using nginx.
在lb01查看index.html
[root@localhost ~]# cat /usr/share/nginx/html/index.html
Welcome to nginx!
Welcome to backup nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.
For online documentation and support please refer to
nginx.org.
Commercial support is available at
nginx.com.
Thank you for using nginx.
[root@localhost ~]# vim /opt/kubernetes/cfg/bootstrap.kubeconfig
[root@localhost ~]# vim /opt/kubernetes/cfg/kubelet.kubeconfig
[root@localhost ~]# vim /opt/kubernetes/cfg/kube-proxy.kubeconfig
#全部都改为VIP地址
server: https://192.168.35.200:6443
[root@localhost ~]# cd /opt/kubernetes/cfg/
[root@localhost cfg]# grep 200 *
bootstrap.kubeconfig: server: https://192.168.35.200:6443
kubelet.kubeconfig: server: https://192.168.35.200:6443
kube-proxy.kubeconfig: server: https://192.168.35.200:6443
[root@localhost cfg]# systemctl restart kubelet.service
[root@localhost cfg]# systemctl restart kube-proxy.service
[root@localhost ~]# tail /var/log/nginx/k8s-access.log
192.168.35.102 192.168.35.100:6443 - [08/Feb/2020:17:42:00 +0800] 200 1119
192.168.35.102 192.168.35.103:6443 - [08/Feb/2020:17:42:00 +0800] 200 1121
192.168.35.101 192.168.35.100:6443 - [08/Feb/2020:17:42:14 +0800] 200 1121
192.168.35.101 192.168.35.100:6443 - [08/Feb/2020:17:42:14 +0800] 200 1121
[root@localhost k8s]# kubectl run nginx --image=nginx
kubectl run --generator=deployment/apps.v1beta1 is DEPRECATED and will be removed in a future version. Use kubectl create instead.
deployment.apps/nginx created
[root@localhost k8s]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-cfggf 1/1 0 ContainerCreating 64s #正在创建中
[root@localhost k8s]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-cfggf 1/1 Running 0 74s #创建完成,运行中
[root@localhost k8s]# kubectl logs nginx-dbddb74b8-cfggf
Error from server (Forbidden): Forbidden (user=system:anonymous, verb=get, resource=nodes, subresource=proxy) ( pods/log nginx-dbddb74b8-cfggf)
[root@localhost k8s]# kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous
clusterrolebinding.rbac.authorization.k8s.io/cluster-system-anonymous created
[root@localhost k8s]# kubectl logs nginx-dbddb74b8-cfggf
//并不会出现报错,只是因为没有去访问,所以没有产生日志
[root@localhost k8s]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
nginx-dbddb74b8-cfggf 1/1 Running 0 14m 172.17.45.2 192.168.35.101
[root@localhost cfg]# curl 172.17.45.2
Welcome to nginx!
Welcome to nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.
For online documentation and support please refer to
nginx.org.
Commercial support is available at
nginx.com.
Thank you for using nginx.
[root@localhost k8s]# kubectl logs nginx-dbddb74b8-cfggf
172.17.45.1 - - [08/Feb/2020:10:10:29 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-"
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