I have two separate docker-compose.yml files in two different folders:
~/front/docker-compose.yml
~/api/docker-compose.yml
How can I make sure that a container in front can send requests to a container in api?
I know that --default-gateway option can be set using docker run for an individual container, so that a specific IP address can be assigned to this container, but it seems that this option is not available when using docker-compose.
Currently I end up doing a docker inspect my_api_container_id and look at the gateway in the output. It works but the problem is that this IP is randomly attributed, so I can't rely on it.
Another form of this question might thus be:
Can I attribute a fixed IP address to a particular container using docker-compose?
But in the end what I'm looking after is:
How can two different docker-compose projects communicate with each other?
You just need to make sure that the containers you want to talk to each other are on the same network. Networks are a first-class docker construct, and not specific to compose.
# front/docker-compose.yml
version: '2'
services:
front:
...
networks:
- some-net
networks:
some-net:
driver: bridge
...
# api/docker-compose.yml
version: '2'
services:
api:
...
networks:
- front_some-net
networks:
front_some-net:
external: true
Note: Your app’s network is given a name based on the “project name”, which is based on the name of the directory it lives in, in this case a prefix front_ was added
They can then talk to each other using the service name. From front you can do ping api and vice versa.
UPDATE: As of compose file version 3.5:
This now works:
version: "3.5"
services:
proxy:
image: hello-world
ports:
- "80:80"
networks:
- proxynet
networks:
proxynet:
name: custom_network
docker-compose up -d will join a network called 'custom_network'. If it doesn't exist, it will be created!
root#ubuntu-s-1vcpu-1gb-tor1-01:~# docker-compose up -d
Creating network "custom_network" with the default driver
Creating root_proxy_1 ... done
Now, you can do this:
version: "2"
services:
web:
image: hello-world
networks:
- my-proxy-net
networks:
my-proxy-net:
external:
name: custom_network
This will create a container that will be on the external network.
I can't find any reference in the docs yet but it works!
Just a small adittion to #johnharris85's great answer,
when you are running a docker compose file, a "default" network is created
so you can just add it to the other compose file as an external network:
# front/docker-compose.yml
version: '2'
services:
front_service:
...
...
# api/docker-compose.yml
version: '2'
services:
api_service:
...
networks:
- front_default
networks:
front_default:
external: true
For me this approach was more suited because I did not own the first docker-compose file and wanted to communicate with it.
All containers from api can join the front default network with following config:
# api/docker-compose.yml
...
networks:
default:
external:
name: front_default
See docker compose guide: using a pre existing network (see at the bottom)
The previous posts information is correct, but it does not have details on how to link containers, which should be connected as "external_links".
Hope this example make more clear to you:
Suppose you have app1/docker-compose.yml, with two services (svc11 and svc12), and app2/docker-compose.yml with two more services (svc21 and svc22) and suppose you need to connect in a crossed fashion:
svc11 needs to connect to svc22's container
svc21 needs to connect to svc11's container.
So the configuration should be like this:
this is app1/docker-compose.yml:
version: '2'
services:
svc11:
container_name: container11
[..]
networks:
- default # this network
- app2_default # external network
external_links:
- container22:container22
[..]
svc12:
container_name: container12
[..]
networks:
default: # this network (app1)
driver: bridge
app2_default: # external network (app2)
external: true
this is app2/docker-compose.yml:
version: '2'
services:
svc21:
container_name: container21
[..]
networks:
- default # this network (app2)
- app1_default # external network (app1)
external_links:
- container11:container11
[..]
svc22:
container_name: container22
[..]
networks:
default: # this network (app2)
driver: bridge
app1_default: # external network (app1)
external: true
Everybody has explained really well, so I'll add the necessary code with just one simple explanation.
Use a network created outside of docker-compose (an "external" network) with docker-compose version 3.5+.
Further explanation can be found here.
First docker-compose.yml file should define network with name giveItANamePlease as follows.
networks:
my-network:
name: giveItANamePlease
driver: bridge
The services of first docker-compose.yml file can use network as follows:
networks:
- my-network
In second docker-compose file, we need to proxy the network by using the network name which we have used in first docker-compose file, which in this case is giveItANamePlease:
networks:
my-proxy-net:
external:
name: giveItANamePlease
And now you can use my-proxy-net in services of a second docker-compose.yml file as follows.
networks:
- my-proxy-net
Since Compose 1.18 (spec 3.5), you can just override the default network using your own custom name for all Compose YAML files you need. It is as simple as appending the following to them:
networks:
default:
name: my-app
The above assumes you have version set to 3.5 (or above if they don't deprecate it in 4+).
Other answers have pointed the same; this is a simplified summary.
UPDATE: As of docker-compose file version 3.5:
I came across a similar problem and I solved it by adding a small change in one of my docker-compose.yml project.
For instance, we have two API's scoring and ner. Scoring API needs to send a request to the ner API for processing the input request. In order to do that they both are supposed to share the same network.
Note: Every container has its own network which is automatically created at the time of running the app inside docker. For example ner API network will be created like ner_default and scoring API network will be named as scoring default. This solution will work for version: '3'.
As in the above scenario, my scoring API wants to communicate with ner API then I will add the following lines. This means Whenever I create the container for ner API then it automatically added to the scoring_default network.
networks:
default:
external:
name: scoring_default
ner/docker-compose.yml
version: '3'
services:
ner:
container_name: "ner_api"
build: .
...
networks:
default:
external:
name: scoring_default
scoring/docker-compose.yml
version: '3'
services:
api:
build: .
...
We can see this how the above containers are now a part of the same network called scoring_default using the command:
docker inspect scoring_default
{
"Name": "scoring_default",
....
"Containers": {
"14a6...28bf": {
"Name": "ner_api",
"EndpointID": "83b7...d6291",
"MacAddress": "0....",
"IPv4Address": "0.0....",
"IPv6Address": ""
},
"7b32...90d1": {
"Name": "scoring_api",
"EndpointID": "311...280d",
"MacAddress": "0.....3",
"IPv4Address": "1...0",
"IPv6Address": ""
},
...
}
You can add a .env file in all your projects containing COMPOSE_PROJECT_NAME=somename.
COMPOSE_PROJECT_NAME overrides the prefix used to name resources, as such all your projects will use somename_default as their network, making it possible for services to communicate with each other as they were in the same project.
NB: You'll get warnings for "orphaned" containers created from other projects.
So many answers!
First of all, avoid hyphens in entities names such as services and networks. They cause issues with name resolution.
Example: my-api won't work. myapi or api will work.
What worked for me is:
# api/docker-compose.yml
version: '3'
services:
api:
container_name: api
...
ports:
- 8081:8080
networks:
- mynetwork
networks:
mynetwork:
name: mynetwork
and
# front/docker-compose.yml
version: '3'
services:
front:
container_name: front
...
ports:
- 81:80
networks:
- mynetwork
networks:
mynetwork:
name: mynetwork
NOTE: I added ports to show how services can access each other, and how they are accessible from the host.
IMPORTANT: If you don't specify a network name, docker-compose will craft one for you. It uses the name of the folder the docker_compose.yml file is in. In this case: api_mynetwork and front_mynetwork. That will prevent communication between containers since they will by on different network, with very similar names.
Note that the network is defined exactly the same in both file, so you can start either service first and it will work. No need to specify which one is external, docker-compose will take care of managing that for you.
From the host
You can access either container using the published ports defined in docker-compose.yml.
You can access the Front container: curl http://localhost:81
You can access the API container: curl http://localhost:8081
From the API container
You can access the Front container using the original port, not the one you published in docker-compose.yml.
Example: curl http://front:80
From the Front container
You can access the API container using the original port, not the one you published in docker-compose.yml.
Example: curl http://api:8080
For using another docker-compose network you just do these(to share networks between docker-compose):
Run the first docker-compose project by up -d
Find the network name of the first docker-compose by: docker network ls(It contains the name of the root directory project)
Then use that name by this structure at below in the second docker-compose file.
second docker-compose.yml
version: '3'
services:
service-on-second-compose: # Define any names that you want.
.
.
.
networks:
- <put it here(the network name that comes from "docker network ls")>
networks:
- <put it here(the network name that comes from "docker network ls")>:
external: true
I would ensure all containers are docker-compose'd to the same network by composing them together at the same time, using:
docker compose --file ~/front/docker-compose.yml --file ~/api/docker-compose.yml up -d
If you are
trying to communicate between two containers from different docker-compose projects and don't want to use the same network (because let's say they would have PostgreSQL or Redis container on the same port and you would prefer to not changing these ports and not use it at the same network)
developing locally and want to imitate communication between two docker compose projects
running two docker-compose projects on localhost
developing especially Django apps or Django Rest Framework (drf) API and running app inside container on some exposed port
getting Connection refused while trying to communicate between two containers
And you want to
container api_a communicate to api_b (or vice versa) without the same "docker network"
(example below)
you can use "host" of the second container as IP of your computer and port that is mapped from inside Docker container. You can obtain IP of your computer with this script (from: Finding local IP addresses using Python's stdlib):
import socket
def get_ip():
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
# doesn't even have to be reachable
s.connect(('10.255.255.255', 1))
IP = s.getsockname()[0]
except:
IP = '127.0.0.1'
finally:
s.close()
return IP
Example:
project_api_a/docker-compose.yml:
networks:
app-tier:
driver: bridge
services:
api:
container_name: api_a
image: api_a:latest
depends_on:
- postgresql
networks:
- app-tier
inside api_a container you are running Django app:
manage.py runserver 0.0.0.0:8000
and second docker-compose.yml from other project:
project_api_b/docker-compose-yml :
networks:
app-tier:
driver: bridge
services:
api:
container_name: api_b
image: api_b:latest
depends_on:
- postgresql
networks:
- app-tier
inside api_b container you are running Django app:
manage.py runserver 0.0.0.0:8001
And trying to connect from container api_a to api_b then URL of api_b container will be:
http://<get_ip_from_script_above>:8001/
It can be especially valuable if you are using even more than two(three or more) docker-compose projects and it's hard to provide common network for all of it - it's good workaround and solution
To connect two docker-compose you need a network and putting both docker-composes in that network,
you could create netwrok with docker network create name-of-network,
or you could simply put network declaration in networks option of docker-compose file and when you run docker-compose (docker-compose up) the network would be created automatically.
put the below lines in both docker-compose files
networks:
net-for-alpine:
name: test-db-net
Note: net-for-alpine is internal name of the network and it will be used inside of the docker-compose files and could be different,
test-db-net is external name of the network and must be same in two docker-compose files.
Assume we have docker-compose.db.yml and docker-compose.alpine.yml
docker-compose.apline.yml would be:
version: '3.8'
services:
alpine:
image: alpine:3.14
container_name: alpine
networks:
- net-for-alpine
# these two command keeps apline container running
stdin_open: true # docker run -i
tty: true # docker run -t
networks:
net-for-alpine:
name: test-db-net
docker-compose.db.yml would be:
version: '3.8'
services:
db:
image: postgres:13.4-alpine
container_name: psql
networks:
- net-for-db
networks:
net-for-db:
name: test-db-net
To test the network, go inside alpine container
docker exec -it alpine sh
then with following commands you could check the network
# if it returns 0 or see nothing as a result, network is established
nc -z psql (container name)
or
ping pgsql
I'm running multiple identical docker-compose.yml files in different directories, using .env files to make a slight difference. And use Nginx Proxy Manage to communicate with other services. here is my file:
make sure you have created a public network
docker network create nginx-proxy-man
/domain1.com/docker-compose.yml, /domain2.com/docker-compose.yml, ...
version: "3.9"
services:
webserver:
build:
context: ./bin/${PHPVERSION}
container_name: "${COMPOSE_PROJECT_NAME}-${PHPVERSION}"
...
networks:
- default # network outside
- internal # network internal
database:
build:
context: "./bin/${DATABASE}"
container_name: "${COMPOSE_PROJECT_NAME}-${DATABASE}"
...
networks:
- internal # network internal
networks:
default:
external: true
name: nginx-proxy-man
internal:
internal: true
.env file just change COMPOSE_PROJECT_NAME
COMPOSE_PROJECT_NAME=domain1_com
.
.
.
PHPVERSION=php56
DATABASE=mysql57
webserver.container_name: domain1_com-php56 - will join the default network (name: nginx-proxy-man), previously created for Nginx Proxy Manager to be accessible from the outside.
Note: container_name is unique in the same network.
database.container_name: domain1_com-mysql57 - easier to distinguish
In the same docker-compose.yml, the services will connect to each other via the service name because of the same network domain1_com_internal. And to be more secure, set this network with the option internal: true
Note, if you don't explicitly specify networks for each service, but just use a common external network for both docker-compose.yml, then it's likely that domain1_com will use domain2_com's database.
Another option is just running up the first module with the 'docker-compose' check the ip related with the module, and connect the second module with the previous net like external, and pointing the internal ip
example
app1 - new-network created in the service lines, mark as external: true at the bottom
app2 - indicate the "new-network" created by app1 when goes up, mark as external: true at the bottom, and set in the config to connect, the ip that app1 have in this net.
With this, you should be able to talk with each other
*this way is just for local-test focus, in order to don't do an over complex configuration
** I know is very 'patch way' but works for me and I think is so simple some other can take advantage of this
Answer for Docker Compose '3' and up
By default Docker Compose uses a bridge network to provision inter-container communication. Read this article for more info about inter-container networking.
What matters for you, is that by default Docker Compose creates a hostname that equals the service name in the docker-compose.yml file. Consider the following docker-compose.yml:
version: '3.9'
services:
server:
image: node:16.9.0
container_name: server
tty: true
stdin_open: true
depends_on:
- mongo
command: bash
mongo:
image: mongo
environment:
MONGO_INITDB_DATABASE: my-database
When you run docker-compose up, Docker will create a default network and assigns the service name as hostname for both mongo and server.
You can now access the backend container via:
docker exec -it server bash
And now you can ping the mongo container using Dockers internal network (default on port 27017 in this case):
curl -v http://mongo:27017/my-database
That's it. The same applies for your setup.
I have had a similar example where I was working with separate docker-compose files working on a docker swarm with an overlay network to do that all I had to do is change the networks parameters as so:
first docker-compose.yaml
version: '3.9'
.
.
.
networks:
net:
driver: overlay
attachable: true
docker-compose -p app up
since I have specified the app name as app using -p the initial network will be app_net.
Now in order to run another docker-compose with multiple services that will use the same network you will need to set these as so:
second docker-compose.yaml
version: '3.9'
.
.
.
networks:
net-ref:
external: true
name: app_net
docker stack deploy -c docker-compose.yml mystack
No matter what name you give to the stack the network will not be affected and will always refer to the existing external network called app_net.
PS: It's important to make sure to check your docker-compose version.
version: '2'
services:
bot:
build: .
volumes:
- '.:/home/node'
- /home/node/node_modules
networks:
- my-rede
mem_limit: 100m
memswap_limit: 100m
cpu_quota: 25000
container_name: 236948199393329152_585042339404185600_bot
command: node index.js
environment:
NODE_ENV: production
networks:
my-rede:
external:
name: name_rede_externa
Follow up of JohnHarris answer, just adding some more details which may be useful to someone: Lets take two docker-compose file and connect them through networks:
1st foldername/docker-compose.yml:
version: '2'
services:
some-contr:
container_name: []
build: .
...
networks:
- somenet
ports:
- "8080:8080"
expose:
# Opens port 8080 on the container
- "8080"
environment:
PORT: 8080
tty: true
networks:
boomnet:
driver: bridge
2nd docker-compose.yml:
version: '2'
services:
pushapiserver:
container_name: [container_name]
build: .
command: "tail -f /dev/null"
volumes:
- ./:/[work_dir]
working_dir: /[work dir]
image: [name of image]
ports:
- "8060:8066"
environment:
PORT: 8066
tty: true
networks:
- foldername_somenet
networks:
foldername_somenet:
external: true
Now you can make api calls to one another services(b/w diff containers)like:
http://pushapiserver:8066/send_push call from some code in files for 1st docker-compose.yml
Two common mistakes (atleast i made them few times):
take note of [foldername] in which your docker-compose.yml file is present. Please see above in 2nd docker-compose.yml i have added foldername in network bc docker create network by [foldername]_[networkname]
Port: this one is very common. Please note i have used 8066 when trying to make connection i.e. http://pushapiserver:8066/... 8066 is port of docker container(2nd docker-compose.yml) so when trying to talk with different docker compose.
docker will use docker container port[8066] and not host machine mapped port
[8060]
2 Containers, one Java application and the second mongodb.
If I run my java app locally and mongodb in a container, it connects but if both run inside a container, java app can't connect to mongodb.
docker-compose file is as follows, am I missing something
version: "3"
services:
user:
image: jboss/wildfly
container_name: "user"
restart: always
ports:
- 8081:8080
- 65194:65193
volumes:
- ./User/target/User.war:/opt/jboss/wildfly/standalone/deployments/User.war
environment:
- JAVA_OPTS=-agentlib:jdwp=transport=dt_socket,address=0.0.0.0:65193,suspend=n,server=y -Djava.net.preferIPv4Stack=true
- MONGO_HOST=localhost
- MONGO_PORT=27017
- MONGO_USERNAME=myuser
- MONGO_PASSWORD=mypass
- MONGO_DATABASE=mydb
- MONGO_AUTHDB=admin
command: >
bash -c "/opt/jboss/wildfly/bin/add-user.sh admin Admin#007 --silent && /opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0 -bmanagement 0.0.0.0"
links:
- mongo
mongo:
image: mongo:4.0.10
container_name: mongo
restart: always
volumes:
- ./assets:/docker-entrypoint-initdb.d/
environment:
- MONGO_INITDB_ROOT_USERNAME=myuser
- MONGO_INITDB_ROOT_PASSWORD=mypass
ports:
- 27017:27017
- 27018:27018
- 27019:27019
Edit
I'm also confused about the following.
links:
- mongo
depends_on:
- mongo
At 2019 July, official docker documentation :
Source: https://docs.docker.com/compose/compose-file/#links
Solution #1 : environment file before start
Basically We centralize all configurations in a file with environment variables and execute it before docker-compose up
The following approach helped me in these scenarios:
Your docker-compose.yml has several containers with complex dependencies between them
Some of your services in your docker-compose needs to connect to another process in the same machine. This process could be a docker container or not.
You need to share variables between several docker-compose files like host, passwords, etc
Steps
1.- Create one file to centralize configurations
This file could be named: /env/company_environments with extension or not.
export MACHINE_HOST=$(hostname -I | awk '{print $1}')
export GLOBAL_LOG_PATH=/my/org/log
export MONGO_PASSWORD=mypass
export MY_TOKEN=123456
2.- Use the env variables in your docker-compose.yml
container A
app_who_needs_mongo:
environment:
- MONGO_HOST=$MACHINE_HOST
- MONGO_PASSWORD=$MONGO_PASSWORD
- TOKEN=$MY_TOKEN
- LOG_PATH=$GLOBAL_LOG_PATH/app1
container B
app_who_needs_another_db_in_same_host:
environment:
- POSTGRESS_HOST=$MACHINE_HOST
- LOG_PATH=$GLOBAL_LOG_PATH/app1
3.- Startup your containers
Just add source before docker-compose commands:
source /env/company_environments
docker-compose up -d
Solution #2 : host.docker.internal
https://stackoverflow.com/a/63207679/3957754
Basically use a feature of docker in which host.docker.internal could be used as the ip of the server in which your docker-compose has started several containers
You probably cant connect because you set the MONGO_HOST as localhost and mongo is a linked service.
In order to use linked services network, you must specify the MONGO_HOST as the name of the service - mongo, like that:
MONGO_HOST=mongo
(First, I'm aware of Can not connect to elasticsearch container in docker. My problem remains.)
I am kicking the tires on ElasticSearch.
I've run the official Docker image from the command line as described in the official documentation, specifying the cluster.name as elasticsearch (the documentation claims that is the default, but inspection reveals it to actually be docker-cluster by default):
$ docker run -p 9200:9200 -p 9300:9300 -e "http.host=0.0.0.0" -e "transport.host=127.0.0.1" -e "xpack.security.enabled=false" -e "cluster.name=elasticsearch" docker.elastic.co/elasticsearch/elasticsearch:5.4.2
You'll note that I've disabled the X-Pack security, following official documentation.
You'll note that I've exposed both port 9200 and port 9300.
The result of pointing a browser at http://localhost:9200/_cat/health is:
1498166019 21:13:39 docker-cluster yellow 1 1 3 3 0 0 3 0 - 50.0%
…which doesn't fill me with confidence, but that's what you get, I guess, when you run things by following the official documentation.
At any rate, next, using Java, I've built the Client like so:
this.client = new PreBuiltTransportClient(Settings.builder()
.put("cluster.name", "elasticsearch")
.put("client.transport.sniff", true)
.build())
.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("127.0.0.1"), 9300));
You'll note I've specified 127.0.0.1 as the hostname (matching the transport.host property) and 9300 as the port (matching the exposed port).
Then I run: this.client.prepareGet("argle", "bargle", "1").get();. I'm expecting to see some kind of "hey, dummy, argle doesn't exist" error.
Instead, this results in the dreaded:
NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{q00tH2RKTlCkXut03lYHOg}{127.0.0.1}{127.0.0.1:9300}]]
What am I doing wrong? What part of the official documentation is incorrect?
The official documentation wants you to set the transport.host Docker environment variable to 127.0.0.1. This needs instead to be set to 0.0.0.0.
So to connect to the official ElasticSearch Docker image for testing purposes, you need to run it like this:
$ docker run -p 9200:9200 -p 9300:9300 -e "http.host=0.0.0.0" -e "transport.host=0.0.0.0" -e "xpack.security.enabled=false" docker.elastic.co/elasticsearch/elasticsearch:5.4.2
The cluster name will be—contrary to what the documentation tells you—docker-cluster (not elasticsearch). So that means that—contrary to what the documentation tells you—you need to build your Java client like this:
this.client = new PreBuiltTransportClient(Settings.builder()
.put("cluster.name", "docker-cluster")
.build())
.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("127.0.0.1"), 9300));
Additionally, you must not have client.transport.sniff set to true. If you set it to true with this configuration, you get the original exception.
In my case, "xpack.security.enabled=false" was the solution.
elasticsearch:
image: docker.elastic.co/elasticsearch/elasticsearch:5.4.1
ports:
- 9200:9200
- 9300:9300
container_name: elasticsearch
ulimits:
memlock:
soft: -1
hard: -1
mem_limit: 1g
environment:
- cluster.name=docker-cluster
- node.name=one
- bootstrap.memory_lock=false
- xpack.security.enabled=false
- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
- network.publish_host=192.168.99.100
- transport.publish_port=9300
volumes:
- /usr/share/elasticsearch/data
elasticsearch2:
image: docker.elastic.co/elasticsearch/elasticsearch:5.4.1
ports:
- 9201:9200
- 9301:9300
container_name: elasticsearch2
ulimits:
memlock:
soft: -1
hard: -1
mem_limit: 1g
environment:
- cluster.name=docker-cluster
- node.name=two
- bootstrap.memory_lock=false
- xpack.security.enabled=false
- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
- network.publish_host=192.168.99.100
- transport.publish_port=9301
- "discovery.zen.ping.unicast.hosts=192.168.99.100"
- "discovery.zen.minimum_master_nodes=2"
volumes:
- /usr/share/elasticsearch/data
I have 3 projects: A hystrix dashboard, a turbine server (using AMQP) and an API
When I start in development env, I set up 2 instances of the API (using port 8080 and 8081). To test the turbine aggregation, I make calls and in the dashboard, I can see Hosts: 2.
Although when I use Docker, even when the load balancer hits the 2 server, I only see one Host on the hystrix dashboard.
My assumptions:
1- as both containers start on the same port (8080), Turbine sees them as one
2- as I also dockerize RabbitMQ, this may be causing problems
here is my docker-compose.yml file
version: '2'
services:
postgres:
image: postgres:9.5
ports:
- "5432"
environment:
POSTGRES_PASSWORD: postgres
POSTGRES_USER: postgres
POSTGRES_DB: fq
volumes:
- /var/lib/postgresql
rabbitmq:
image: rabbitmq:3-management
ports:
- "5672"
- "15672"
environment:
RABBITMQ_DEFAULT_USER: turbine
RABBITMQ_DEFAULT_PASS: turbine
volumes:
- /var/lib/rabbitmq/
hystrix:
build: hystrixdashboard/.
links:
- turbine_server
ports:
- "8989:8989"
turbine_server:
build: turbine/.
links:
- rabbitmq
ports:
- "8090:8090"
persona_api:
build: persona/.
ports:
- "8080"
links:
- postgres
- rabbitmq
lb:
image: 'dockercloud/haproxy:1.5.1'
links:
- persona_api
volumes:
- /var/run/docker.sock:/var/run/docker.sock
ports:
- 80:80
my persona_api config file
spring:
application:
name: persona_api
profiles:
active: dev
rabbitmq:
addresses: 127.0.0.1:5672
username: turbine
password: turbine
useSSL: false
server:
compression.enabled: true
port: ${PORT:8080}
params:
datasource:
driverClassName: org.postgresql.Driver
username: postgres
password: postgres
maximumPoolSize: 10
poolName: fq_connection_pool
spring.jpa:
show-sql: true
hibernate:
ddl-auto: update
turbine:
aggregator:
clusterConfig: persona_api
appConfig: persona_api
---
spring:
profiles: dev
params:
datasource:
jdbcUrl: jdbc:postgresql://127.0.0.1:5432/fq
---
spring:
profiles: docker
rabbitmq:
addresses: rabbitmq:5672
params:
datasource:
jdbcUrl: jdbc:postgresql://postgres:5432/fq
I'm afraid that if I deploy it to production (on Rancher or Docker cloud), I'll see the same problem.
here is a GIF of what is happening when I set up two APIs load balanced
try:
hystrix.stream.queue.send-id=false
in your API
I do assume your problem is the RabbitMQ connection you are using. Cause the connection string you are using is localhost but actually except the RabbitMQ container on none the connection will be available on localhost. I do suggest that you inject the Rabbit host into your Spring connection using environment variables. If I read your files correct it should be ${RABBITMQ_PORT_5672_TCP_ADDR} instead of localhost. But be aware that I couldn't try. Its just an educated guess. Better you double check by doing an env inside your persona_api container when everything is running.
It's should be fixed your issue.
eureka:
instance:
prefer-ip-address: true
instance-id: ${spring.cloud.client.ipAddress}:${server.port} #make the application unique on the rancher service layer
spring:
application:
index: ${random.uuid} #make the application unique on the rancher containe layer,same service but with multi-instances.
https://github.com/spring-cloud/spring-cloud-netflix/issues/740
Need instance-id:${spring.cloud.client.ipAddress}:${server.port} and index: ${random.uuid} both