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start services
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rm services
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volume creation
Define the Configuration hash some place . Check Examples at defaults/main.yml.ex
- Create 2 volumes
- Start 1 service
- remove one service
swarm_run: # Generic example
volumes:
create: # volumes List to be created
- name: demo_volume_1 # volume name
option: "none" # Any option to volume creation can be specified here
- name: demo_volume_2
option: "none"
test: # This test list is run after all the services are
# created. Tests are runn from localhost (host
# invoking ansible )
- name: test1 # basic testing to service1
command: |
curl --max-time 20 {{ swarm_manager_ip }}:{{ swarm_aux.exposed_ports.microservice1 }}
- name: test2 # sequential test in same service
command: |
NUMTEST=100
TIMEOUT="0.1"
for i in {1..$NUMTEST}
do
curl --max-time $TIMEOUT {{ swarm_manager_ip }}:{{ swarm_aux.exposed_ports.microservice1 }}
done
services:
start: # define services here
# if the service is running will not
# change anything
- name: demo_service_1 # service name
image: alpine # service image
tag: latest # optional image tag ( default latest )
command: "ping docker.com" # Command to run on the image
options: # Any service option can go here
# see examples bellow
# Important: if --detach=false only
# when service is ready will
# exit
--mount type=volume,source=demo_volume_1,destination=/tmp
--replicas 1
--update-delay 10s
--update-parallelism 3
remove: # Define the servives to be removed
- name: demo_service_3
# Examples for service option
# --replicas 1 Number or replicas in the swarm for the service
# --mode global service in each node of the cluster
# --update-delay 10s how often check for updates
# --update-parallelism 3 How many concurrent updates
# -- publish 8080:80 expose a port to ouside world and connect local port
# optional protocol eg:/tcp
# can be used several times
# --env MYVAR=myvalue set environment variable
# --workdir /tmp set working dir
# --user my_user set user
# --mount
# type=volume,
# source=my-volume,
# destination=/path/in/container,
# volume-label="color=red",
# volume-label="shape=round" \
- Load balancing btw 2 nginx servers testing if they are running
- demo the replicas options and publishing public ports
swarm_aux2: # aux values used in configuration
exposed_ports:
nginx1: 8080
nginx2: 8081
swarm_run:
test: # List of command to run after deploy the services.
# Can be used for testing
- name: test1
command: "curl --max-time 1 {{ swarm_manager_ip }}:{{ swarm_aux.exposed_ports.nginx1 }}"
- name: test2
command: "curl --max-time 1 {{ swarm_manager_ip }}:{{ swarm_aux.exposed_ports.nginx2 }}"
services:
start:
- name: demo2_nginx_1
image: nginx
tag: latest
options:
--replicas 3
--publish {{ swarm_aux.exposed_ports.nginx1 }}:80 # Access service on 8080 @ any swarm host
- name: demo2_nginx_2
image: nginx
tag: latest
options:
--replicas 3
--publish {{ swarm_aux.exposed_ports.nginx2 }}:80 # Access service on 8081 @ any swarm hostPratical example of an microservice architecture with 4 service , 3 replicas for each
swarm_run: # microservice example
test:
- name: test5 # sequential test in same service
command: |
NUMTEST=10000
TIMEOUT=0.1
for i in {1..$NUMTEST}
do
curl --max-time $TIMEOUT {{ swarm_manager_ip }}:{{ swarm_aux.exposed_ports.microservice4 | default(2003) }}
done
services:
start:
- name: demo3_microservice_1
image: python
tag:
--replicas 3
--publish {{ swarm_aux.exposed_ports.microservice1 | default("2000")}}:{{ swarm_aux.internal_ports.microservice1 | default("8080")}}
- name: demo3_microservice_2
image: python
tag: latest
command: |
python -m http.server {{ swarm_aux.internal_ports.microservice2 | default("8081")}}
options:
--replicas 3
--publish {{ swarm_aux.exposed_ports.microservice2 | default("2001")}}:{{ swarm_aux.internal_ports.microservice2 | default("8081")}}
- name: demo3_microservice_3
image: :
- name: test1
command: "curl --max-time 1 {{ swarm_manager_ip }}:{{ swarm_aux.exposed_ports.nginx1 }}"
- name: test2
command: "curl --max-time 1 {{ swarm_manager_ip }}:{{ swarm_aux.exposed_ports.nginx2 }}"
services: # single service at 8080
start:
- name: demo4_nginx_1
image: nginx
tag: latest
options:
--replicas 2
--publish {{ swarm_aux.exposed_ports.nginx1 }}:80
--mount type=volume,source=demo_volume_1,destination=/tmp
- name: demo4_nginx_2
image: nginx
tag: latest
options:
--replicas 2
--publish {{ swarm_aux.exposed_ports.nginx2 }}:80-
check service status aflter creation or deletion
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update services
docker service update --image redis:3.0.7 redis redis- tests
GNU GPLv3
Created by Miguel Rodrigues