Why can't I cURL my HTTP service running on a Docker container in a CI?
Summary
-
I am starting a springboot application for running integration test in a gitlab-ci job.
-
The docker service have been started with
docker run -p8080:8080 --name api-test
Steps to reproduce
I need to query the service with the following curl command:
curl --header "Accept:application/json" --connect-timeout 1000 localhost:8080/pingWhat is the current bug behavior?
This is how it fail in Gitlab CI:
Tomcat started on port(s): 8080 (http)
Started ApiApplication in 26.11 seconds (JVM running for 26.673)
API started!
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3d8e02acfafc registry.domain.com/domain/api:0.5.0 "java -Djava.secur..." 31 seconds ago Up 30 seconds 0.0.0.0:8080->8080/tcp api-test
$ export API_TEST_HOST2=$(docker ps | grep api-test | awk -F ' ' '{print $1}' | xargs docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}')
$ echo $API_TEST_HOST2
172.18.0.2
$ echo "${API_TEST_HOST2} api-test.com" | tee -a /etc/hosts
172.18.0.2 api-test.com
$ hostname -i
172.17.0.20
$ curl --header "Accept:application/json" --connect-timeout 1000 api-test.com:8080/ping
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:01 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:02 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:03 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:04 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:05 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:06 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:07 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:08 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:09 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:10 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:11 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:12 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:13 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:14 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:15 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:16 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:17 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:18 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:19 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:00:20 --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- 0:02:09 --:--:-- 0curl: (7) Failed to connect to api-test.com port 8080: Connection timed out
Running after script...
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3d8e02acfafc registry.domain.com/domain/api:0.5.0 "java -Djava.secur..." 2 minutes ago Up 2 minutes 0.0.0.0:8080->8080/tcp api-test
ERROR: Job failed: exit code 1I have tried with the domain used for the cookie but it should have worked fine with localhost instead :
$ curl --header "Accept:application/json" --connect-timeout 1000 localhost:8080/ping
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0curl: (7) Failed to connect to localhost port 8080: Connection refusedWhat is the expected correct behavior?
This is locally how it succeed:
dka@dev-01:[~]: curl -H "Accept: application/json" --connect-timeout 2 172.31.0.6:8080/ping
{"date":"2017-12-03 15:41:32","message":"Welcome to our API","version":"test-version","status":"OK"}Possible fixes
If I try the curl command inside the container itself it work so it's clearly a networking issue:
$ docker exec $API_TEST_HOST wget -O - localhost:8080/ping | grep OK
Connecting to localhost:8080 (127.0.0.1:8080)
- 100% |*******************************| 100 0:00:00 ETA
{"date":"2017-12-03 17:14:10","message":"Welcome to our API","version":"test-version","status":"OK"}I am out of idea to debug this
- Why is my service not accessible ?
- How can I access it ?
I take all idea that could help me debug this (remember it is a ci build pipeline process and I don't have tty)
Edited by Kopax Anderson