Question

我的集群中有2个节点，一个管理器和一个工作器。我部署了一个堆栈，在这些节点中分布有5个副本。 yaml文件具有一个称为Web的网络，用于服务Web。部署它们后，我尝试访问该服务，但是当我使用管理器节点的IP地址时，它将在2个副本之间进行负载平衡；如果使用工作服务器的IP地址，则将在其他3个副本之间进行负载平衡。因此，仅使用docker，如何在所有5个副本之间进行负载平衡？

我的节点：

root@debiancli:~/docker# docker node ls
ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUS      ENGINE VERSION
5y256zrqwalq1hcxmqnnqc177     centostraining      Ready               Active                                  18.06.0-ce
mkg6ecl3x28uyyqx7gvzz0ja3 *   debiancli           Ready               Active              Leader              18.06.0-ce

经理（自己）和工人（中心培训）中的任务：

root@debiancli:~/docker# docker node ps self
ID                  NAME                  IMAGE                              NODE                DESIRED STATE       CURRENT STATE         ERROR               PORTS
stbe721sstq7        getstartedlab_web.3   get-started:part2   debiancli           Running             Running 2 hours ago                       
6syjojjmyh0y        getstartedlab_web.5   get-started:part2   debiancli           Running             Running 2 hours ago                       
root@debiancli:~/docker# docker node ps centostraining 
ID                  NAME                  IMAGE                              NODE                DESIRED STATE       CURRENT STATE                    ERROR               PORTS
wpvsd98vfwd1        getstartedlab_web.1   get-started:part2   centostraining      Running             Running less than a second ago                       
e3z8xybuv53l        getstartedlab_web.2   get-started:part2   centostraining      Running             Running less than a second ago                       
sd0oi675c2am        getstartedlab_web.4   get-started:part2   centostraining      Running             Running less than a second ago

堆栈及其任务：

root@debiancli:~/docker# docker stack ls
NAME                SERVICES            ORCHESTRATOR
getstartedlab       1                   Swarm
root@debiancli:~/docker# docker stack ps getstartedlab 
ID                  NAME                  IMAGE                              NODE                DESIRED STATE       CURRENT STATE                    ERROR               PORTS
wpvsd98vfwd1        getstartedlab_web.1   get-started:part2   centostraining      Running             Running less than a second ago                       
e3z8xybuv53l        getstartedlab_web.2   get-started:part2   centostraining      Running             Running less than a second ago                       
stbe721sstq7        getstartedlab_web.3   get-started:part2   debiancli           Running             Running 2 hours ago                                  
sd0oi675c2am        getstartedlab_web.4   get-started:part2   centostraining      Running             Running less than a second ago                       
6syjojjmyh0y        getstartedlab_web.5   get-started:part2   debiancli           Running             Running 2 hours ago

网络（我的任务使用的是getstartedlab_webnet）

root@debiancli:~/docker# docker network ls
NETWORK ID          NAME                   DRIVER              SCOPE
b95dd9ee2ae6        bridge                 bridge              local
63578897e920        docker_gwbridge        bridge              local
x47kwsfa23oo        getstartedlab_webnet   overlay             swarm
7f77ad495edd        host                   host                local
ip8czm66ofng        ingress                overlay             swarm
f2cc6118fde7        none                   null                local

docker-compose.yml用于部署堆栈：

root@debiancli:~/docker#cat docker-compose.yml 
version: "3"
services:
  web:
    image: get-started:part2
    deploy:
      replicas: 5
      resources:
        limits:
          cpus: "0.1"
          memory: 50M
      restart_policy:
        condition: on-failure
    ports:
      - "4000:80"
    networks:
      - webnet
networks:
  webnet:

从第三台计算机访问服务（此curl和grep将拉出容器名称）

[Ubuntu:~]$ debiancli=192.168.182.129
[Ubuntu:~]$ centostraining=192.168.182.133
[Ubuntu:~]$ curl -s $debiancli:4000 | grep -oP "(?<=</b> )[^<].{11}"
f4c1e3ff53f2
[Ubuntu:~]$ curl -s $debiancli:4000 | grep -oP "(?<=</b> )[^<].{11}"
de2110bee2f7
[Ubuntu:~]$ curl -s $debiancli:4000 | grep -oP "(?<=</b> )[^<].{11}"
f4c1e3ff53f2
[Ubuntu:~]$ curl -s $debiancli:4000 | grep -oP "(?<=</b> )[^<].{11}"
de2110bee2f7
[Ubuntu:~]$ curl -s $debiancli:4000 | grep -oP "(?<=</b> )[^<].{11}"
f4c1e3ff53f2
[Ubuntu:~]$ curl -s $debiancli:4000 | grep -oP "(?<=</b> )[^<].{11}"
de2110bee2f7
[Ubuntu:~]$ curl -s $centostraining:4000 | grep -oP "(?<=</b> )[^<].{11}"
72b757f92983
[Ubuntu:~]$ curl -s $centostraining:4000 | grep -oP "(?<=</b> )[^<].{11}"
d2e824865436
[Ubuntu:~]$ curl -s $centostraining:4000 | grep -oP "(?<=</b> )[^<].{11}"
b53c3fd0cfbb
[Ubuntu:~]$ curl -s $centostraining:4000 | grep -oP "(?<=</b> )[^<].{11}"
72b757f92983
[Ubuntu:~]$ curl -s $centostraining:4000 | grep -oP "(?<=</b> )[^<].{11}"
d2e824865436
[Ubuntu:~]$ curl -s $centostraining:4000 | grep -oP "(?<=</b> )[^<].{11}"
b53c3fd0cfbb
[Ubuntu:~]$ curl -s $centostraining:4000 | grep -oP "(?<=</b> )[^<].{11}"
72b757f92983
[Ubuntu:~]$ curl -s $centostraining:4000 | grep -oP "(?<=</b> )[^<].{11}"
d2e824865436

请注意，当我探测debiancli（群发管理器）时，它仅循环遍历容器f4c1e3ff53f2和de2110bee2f7，也就是说，在管理器上运行的2个副本和在中心集中的3个副本都发生了同样的情况（勤劳的工人）。所以，我想念什么？

Docker群：负载均衡器不会循环执行所有任务

0 个答案: