I am trying to connect to a local web service running on a docker VM, the docker VM is spun up by GitLab.com CI. Whenever trying to curl localhost:<port name> I always get connection refused.
Whenever I try ss -lt after starting the web service with the embedded tomcat it returns no open ports. So I do not understand why tomcat (I assume) is not getting picked up when the application is clearly running.
Below are the steps I have used to reproduce the issue:
Firstly the web service is the basic project provided by [spring][1], I have copied the GitHub repository into my own GitLab repo. This web service runs on ports 9000 and 9001, and running locally curl returns data from the web service
To trigger automatic builds in GitLab CI a .yml file is used.
The first run I just executed the web service (knowing it would continuously run) to check that it executed correctly.
.gitlab-ci.yml
image: maven:3.3.9-jdk-8
test:
script:
- mvn -f complete/pom.xml clean compile
- mvn -f complete/pom.xml package
- java -jar complete/target/gs-actuator-service-0.1.0.jar
1st Run Output:
...
$ java -jar complete/target/gs-actuator-service-0.1.0.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.3.5.RELEASE)
2016-05-30 11:57:29.030 INFO 144 --- [ main] hello.HelloWorldConfiguration : Starting HelloWorldConfiguration v0.1.0 on runner-8a2f473d-project-1243034-concurrent-0 with PID 144 (/builds/Steven/testProject/complete/target/gs-actuator-service-0.1.0.jar started by root in /builds/Steven/testProject)
2016-05-30 11:57:29.035 INFO 144 --- [ main] hello.HelloWorldConfiguration : No active profile set, falling back to default profiles: default
2016-05-30 11:57:29.214 INFO 144 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7a50143b: startup date [Mon May 30 11:57:29 UTC 2016]; root of context hierarchy
2016-05-30 11:57:32.634 INFO 144 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 9000 (http)
2016-05-30 11:57:32.653 INFO 144 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
2016-05-30 11:57:32.655 INFO 144 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.33
2016-05-30 11:57:32.878 INFO 144 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2016-05-30 11:57:32.878 INFO 144 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 3671 ms
2016-05-30 11:57:33.536 INFO 144 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2016-05-30 11:57:33.544 INFO 144 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'metricFilter' to: [/*]
2016-05-30 11:57:33.545 INFO 144 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2016-05-30 11:57:33.545 INFO 144 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2016-05-30 11:57:33.545 INFO 144 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2016-05-30 11:57:33.545 INFO 144 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2016-05-30 11:57:33.546 INFO 144 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'webRequestLoggingFilter' to: [/*]
2016-05-30 11:57:33.546 INFO 144 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'applicationContextIdFilter' to: [/*]
The output shows tomcat running on port 9000
Running another build to run the web service in the background an trying to connect to it demonstrates the issue with connecting to localhost
.gitlab-ci.yml
image: maven:3.3.9-jdk-8
test:
script:
- mvn -f complete/pom.xml clean compile
- mvn -f complete/pom.xml package
- java -jar complete/target/gs-actuator-service-0.1.0.jar &
- ps -ef
- ss -lt
- curl localhost:9000
2nd Run Output
...
$ java -jar complete/target/gs-actuator-service-0.1.0.jar &
$ ps -ef
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 12:03 ? 00:00:00 /bin/bash
root 8 1 0 12:03 ? 00:00:00 /bin/bash
root 143 8 0 12:04 ? 00:00:00 java -jar complete/target/gs-actuator-service-0.1.0.jar
root 144 8 0 12:04 ? 00:00:00 ps -ef
$ ss -lt
State Recv-Q Send-Q Local Address:Port Peer Address:Port
$ curl localhost:9000
% 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 9000: Connection refused
The 1st run output clearly shows the application running on port 9000, and the 2nd run shows the process of the application is running. So why does ss -lt return nothing and not connect to localhost:9000?
Please note I have also tried:
- curl -I http://127.0.0.1:9000/
- curl -I http://0.0.0.0:9000/
- curl -I http://localhost:9000/
Does anyone know why I cannot connect to my running web service?
[1]: https://spring.io/guides/gs/actuator-service/#use-maven