The script waiting for services to be started in docker-compose containers and accessible by host:port
$ WAIT_ATTEMPTS=2 WAIT_SERVICES=google.com:80,google.com:81 wait-services
Service google.com:80 is ready
Service google.com:81 is not ready
Service google.com:81 is not ready
version: '2'
services:
first_service:
image: alpine
command: sh -c "sleep 5; nc -lk -p 11111 0.0.0.0"
second_service:
image: alpine
command: sh -c "sleep 8; nc -lk -p 22222 0.0.0.0"
app:
build: .
environment:
- WAIT_SERVICES=first_service:11111,second_service:22222
- WAIT_ATTEMPTS=10
depends_on:
- first_service
- second_service
command: sh -c "wait-services && nc -z first_service 11111 && echo Connected"Run the services:
$ docker-compose up
Starting waitservices_first_service_1 ...
Starting waitservices_second_service_1 ...
Starting waitservices_first_service_1
Starting waitservices_second_service_1 ... done
Recreating waitservices_app_1 ...
Recreating waitservices_app_1 ... done
Attaching to waitservices_first_service_1, waitservices_second_service_1, waitservices_app_1
app_1 | bash: connect: Connection refused
app_1 | bash: /dev/tcp/first_service/11111: Connection refused
app_1 | Service first_service:11111 is not ready
app_1 | bash: connect: Connection refused
app_1 | bash: /dev/tcp/first_service/11111: Connection refused
app_1 | Service first_service:11111 is not ready
app_1 | Service first_service:11111 is ready
app_1 | bash: connect: Connection refused
app_1 | bash: /dev/tcp/second_service/22222: Connection refused
app_1 | Service second_service:22222 is not ready
app_1 | bash: connect: Connection refused
app_1 | bash: /dev/tcp/second_service/22222: Connection refused
app_1 | Service second_service:22222 is not ready
app_1 | bash: connect: Connection refused
app_1 | bash: /dev/tcp/second_service/22222: Connection refused
app_1 | Service second_service:22222 is not ready
app_1 | Service second_service:22222 is ready
app_1 | All services have started successfully
app_1 | Connected
waitservices_app_1 exited with code 0
^CGracefully stopping... (press Ctrl+C again to force)
Stopping waitservices_second_service_1 ... done
Stopping waitservices_first_service_1 ... done- WAIT_SERVICES: List of services for waiting (host:port).
- WAIT_ATTEMPTS: Max number of attempts to check services availability (default 30).
- WAIT_BEFORE: Number of second to wait before start checking (default 0).
- WAIT_SLEEP: Number of second between checks (default 1).
- WAIT_AFTER: Number of second to wait after checking is finished (default 0).
Some ideas has been taken from