Docker Swarm loadbalancing with haproxy
This Artice i am going to describes loadbalncing with haproxy and distributing the containers into differnt nodes using docker swarm
Step1:
Create the docker-machine Loadbalancer node
docker-machine create --driver virtualbox loadbalancer
Step2 :
Create the docker-machine Manager node
docker-machine create --driver virtualbox manager1
Step3 :
Create the docker-machine Worker-1 and Worker-2 node
docker-machine create --driver virtualbox worker1
docker-machine create --driver virtualbox worker2
Step4 :
ssh into manager-1 node
eval $(docker-machine env manager1)
Step5 :
docker swarm init --advertise-addr $(docker-machine ip manager1)
Swarm initialized: current node (b4etd4utcgn9xnpawfs2tf5qe) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join --token SWMTKN-1-0hbyhpos06fwf85r35319wyhjpfysk9l88emio2av1qsr04alu-8th0xvea2f0yw3voiqc5er32c 192.168.99.100:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
Step6:
Go to the other worker nodes and join the worker nodes to swaram manager
eval $(docker-machine env worker-1)
docker swarm join --token SWMTKN-1-0hbyhpos06fwf85r35319wyhjpfysk9l88emio2av1qsr04alu-8th0xvea2f0yw3voiqc5er32c 192.168.99.100:2377
Step7 :
eval $(docker-machine env worker-2)
docker swarm join --token SWMTKN-1-0hbyhpos06fwf85r35319wyhjpfysk9l88emio2av1qsr04alu-8th0xvea2f0yw3voiqc5er32c 192.168.99.100:2377
Step8: execute docker-machine ls
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
load-balancer - virtualbox Running tcp://192.168.99.101:2376 v18.09.5
manager1 - virtualbox Running tcp://192.168.99.100:2376 v18.09.5
worker-1 - virtualbox Running tcp://192.168.99.102:2376 v18.09.5
worker-2 * virtualbox Running tcp://192.168.99.103:2376 v18.09.5
Step8 :
Go to loadbalancer node
eval $(docker-machine env load-balancer)
Step9:
docker-compose up -d
Creating network "docker-swarm-loadbalancing-haproxy_default" with the default driver
Creating lb ... done
madhu@Admins-MacBook-Pro:~/dockerfiles/docker-swarm-loadbalancing-haproxy$ docker-compose ps
Name Command State Ports
------------------------------------------------------------------------------------------
lb /docker-entrypoint.sh hapr ... Up 0.0.0.0:80->80/tcp, 0.0.0.0:8404->8404/tcp
Step10:
madhu@Admins-MacBook-Pro:~/dockerfiles/docker-swarm-loadbalancing-haproxy$ eval $(docker-machine env manager1)
madhu@Admins-MacBook-Pro:~/dockerfiles/docker-swarm-loadbalancing-haproxy$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
b4etd4utcgn9xnpawfs2tf5qe * manager1 Ready Active Leader 18.09.5
c7gnmmmvoalmb4vowhxcmgs58 worker-1 Ready Active 18.09.5
eu7lv79v468fl6z3apok9a4u1 worker-2 Ready Active 18.09.5
Step 11:
docker stack deploy -c docker-compose-microservices.yml account-stack
Ignoring unsupported options: restart
Ignoring deprecated options:
container_name: Setting the container name is not supported.
Creating network account-stack_back-end
Creating service account-stack_visualizer
Creating service account-stack_account-service
madhu@Admins-MacBook-Pro:~/dockerfiles/docker-swarm-loadbalancing-haproxy$
Step 12:
docker stack ls
NAME SERVICES ORCHESTRATOR
account-stack 2 Swarm
madhu@Admins-MacBook-Pro:~/dockerfiles/docker-swarm-loadbalancing-haproxy$ docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
oh76u5b6lyz3 account-stack_account-service replicated 1/1 madhukargunda/account-service:latest *:80->2222/tcp
mxin1o40530h account-stack_visualizer replicated 1/1 dockersamples/visualizer:stable *:7001->8080/tcp
docker service ps account-stack
docker stack ps account-stack
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
g7iud46vufo6 account-stack_account-service.1 madhukargunda/account-service:latest worker-1 Running Running 8 minutes ago
vyvxhfub1hv4 account-stack_visualizer.1 dockersamples/visualizer:stable manager1 Running Running 9 minutes ago
docker stack services account-stack
ID NAME MODE REPLICAS IMAGE PORTS
mxin1o40530h account-stack_visualizer replicated 1/1 dockersamples/visualizer:stable *:7001->8080/tcp
oh76u5b6lyz3 account-stack_account-service replicated 1/1 madhukargunda/account-service:latest *:80->2222/tcp
docker-machine ls
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
load-balancer - virtualbox Running tcp://192.168.99.101:2376 v18.09.5
manager1 * virtualbox Running tcp://192.168.99.100:2376 v18.09.5
worker-1 - virtualbox Running tcp://192.168.99.102:2376 v18.09.5
worker-2 - virtualbox Running tcp://192.168.99.103:2376 v18.09.5
Step13 : Use the loadbalancer IP and Port access the swagger-ui.html
Step14 : Scale the account-service
docker service scale oh7=3
oh7 scaled to 3
overall progress: 3 out of 3 tasks
1/3: running [==================================================>]
2/3: running [==================================================>]
3/3: running [==================================================>]
verify: Service converged
madhu@Admins-MacBook-Pro:~/dockerfiles/docker-swarm-loadbalancing-haproxy$ docker stack services account-stack
ID NAME MODE REPLICAS IMAGE PORTS
mxin1o40530h account-stack_visualizer replicated 1/1 dockersamples/visualizer:stable *:7001->8080/tcp
oh76u5b6lyz3 account-stack_account-service replicated 3/3 madhukargunda/account-service:latest *:80->2222/tcp
Step15 : Open the docker swarm visualizer to verify \
http://192.168.99.100:7001/
Step16 : tail the docker service logs
docker service logs oh7 -f
Step17 : Launch the http://192.168.99.101/swagger-ui.html and invoke the rest api URL
and we can see each request routed to one service.
