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AadamZ5 opened this issue Aug 15, 2022 · 6 comments
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Agent hangs on 'connecting' when deploying using local docker #3513

AadamZ5 opened this issue Aug 15, 2022 · 6 comments
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@kylecarbs

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@AadamZ5
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AadamZ5 commented Aug 15, 2022

When deploying with the docker template, it seems the container can not download the required dependencies.

Container log:

+ trap waitonexit EXIT
+ mktemp -d -t coder.XXXXXX
+ BINARY_DIR=/tmp/coder.riHRwV
+ BINARY_NAME=coder
+ BINARY_URL=http://127.0.0.1:3000/bin/coder-linux-amd64
+ cd /tmp/coder.riHRwV
+ :
+ status=
+ command -v curl
+ curl -fsSL --compressed http://127.0.0.1:3000/bin/coder-linux-amd64 -o coder
curl: (7) Failed to connect to 127.0.0.1 port 3000: Connection refused
+ status=7
error: failed to download coder agent
       command returned: 7
Trying again in 30 seconds...
+ echo error: failed to download coder agent
+ echo        command returned: 7
+ echo Trying again in 30 seconds...
+ sleep 30

This repeats and it can never reach the host network. Running on linux x86_64

I can reach the host address from outside of the container (on the host itself) and the url path gives me a file to download. Seems like the container can't reach host.

> coder version
Coder v0.8.5+95f26f7 Wed Aug 10 16:30:46 UTC 2022
https://github.com/coder/coder/commit/95f26f74b6ff6be1ffe42fceb21f70219889dc99
@kylecarbs
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@AadamZ5 the container is attempting to dial localhost, which can only reach inside the container.

You'll have to use the Docker host gateway to access port 3000 on your host machine from inside the container:

coder/examples/templates/docker/main.tf

Lines 76 to 83 in 2306d2c

# Use the docker gateway if the access URL is 127.0.0.1
command = [
"sh", "-c", replace(coder_agent.main.init_script, "localhost", "host.docker.internal")]
env = ["CODER_AGENT_TOKEN=${coder_agent.main.token}"]
host {
host = "host.docker.internal"
ip = "host-gateway"
}

@AadamZ5 AadamZ5 mentioned this issue Aug 15, 2022
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@AadamZ5
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AadamZ5 commented Aug 15, 2022

@kylecarbs I agree. However, is this something I have to manually edit in a template? How come the default docker template does not connect to the Coder instance correctly?

@kylecarbs
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Agreed. I'll fix this up!

@bpmct
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bpmct commented Aug 15, 2022

Thanks for reporting, at one point I think Coder always identified localhost as 127.0.0.1 in the access URL, but this behavior must have changed.

@kylecarbs
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coder/terraform-provider-coder#37

Once this is merged, we can fix up the template to no longer replace the host 😎

@kylecarbs kylecarbs self-assigned this Aug 18, 2022
@kylecarbs
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That change wasn't sufficient, but this one will be! coder/terraform-provider-coder#40

@bpmct bpmct closed this as completed Sep 19, 2022
@kylecarbs kylecarbs mentioned this issue Sep 26, 2022
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@kylecarbs @AadamZ5 @bpmct