How to start a docker container inside the setup? - docker

Question

I have created a DroneCI pipeline with the following content:
kind: pipeline
type: docker
name: Build auto git tagger
steps:
- name: test and build
image: golang
commands:
- go mod download
- go test ./test
- go build -o ./build/package ./cmd/git-tagger
- name: Build docker image
image: plugins/docker
pull: if-not-exists
settings:
username:
password:
repo:
dockerfile:
registry:
auto_tag:
trigger:
branch:
- master
The go test starts a gogs docker container for testing purpose, here is the code:
func createGogsContainer(dest, waitUrl string) (stopContainer, error) {
client, err := docker.NewClientFromEnv()
if err != nil {
return nil, err
}
ctx := context.Background()
gogs, err := client.CreateContainer(docker.CreateContainerOptions{
Name: "repo",
Config: &docker.Config{
Image: "gogs/gogs",
},
HostConfig: &docker.HostConfig{
PublishAllPorts: true,
AutoRemove: true,
Mounts: []docker.HostMount{
{
Type: "bind",
Source: dest,
Target: "/data",
}},
PortBindings: map[docker.Port][]docker.PortBinding{
"3000/tcp": {{HostIP: "0.0.0.0", HostPort: "8888"}},
"22/tcp": {{HostIP: "0.0.0.0", HostPort: "2222"}},
},
},
Context: ctx,
})
if err != nil {
return nil, err
}
err = client.StartContainer(gogs.ID, nil)
if err != nil {
return nil, err
}
//Wait for connection
host, err := url.Parse(waitUrl)
if err != nil {
return nil, err
}
err = waitHTTP(fmt.Sprintf("%s://%s", host.Scheme, host.Host), 3, 0)
if err != nil {
return nil, err
}
return func() error {
return client.StopContainerWithContext(gogs.ID, 5, ctx)
}, nil
}
The pipeline has been aborted with following error message:
latest: Pulling from library/golang
Digest: sha256:f30b0d05ea7783131d84deea3b5f4d418d9d930dfa3668a9a5fa253d1f9dce5a
Status: Image is up to date for golang:latest
+ go mod download
+ go test ./test
time="2020-04-23T17:58:24Z" level=error msg="Get \"http://0.0.0.0:8888/gat/WithoutTag.git/info/refs?service=git-upload-pack\": dial tcp 0.0.0.0:8888: connect: connection refused"
time="2020-04-23T17:58:24Z" level=error msg="Get \"http://0.0.0.0:8888/gat/WithoutTag.git/info/refs?service=git-upload-pack\": dial tcp 0.0.0.0:8888: connect: connection refused"
What am I doing wrong?

Answer 1

Have a look at Drone services. It allows you to bring up a container as part of your pipeline and access its ports.
In your case you can bring up the Gogs container like this:
services:
- name: gogs
image: gogs/gogs
And then use it like this in your pipeline steps:
steps:
- name: test and build
image: golang
commands:
- curl "http://gogs"
-
...
(this assumes the gogs container listens on port 80. If it's a different port then you need to adjust the URI).
Hint: the name of the service is the DNS name of the container.