Drone docker-plugin fails during container build

Drone Support
1

We’re running drone.io on rancher kubernetes.

Versions:
Drone.io Server version 1.6.5
drone-kube-runner version 1.0.0-beta2
Rancher v2.3.5
Kubernetes 1.16.8
docker-ce 19.03.8
Platform: Ubuntu 18.04 LTS
Infra: Azure

During our build pipeline the container build step hangs and the last thing shown in the logs is:

Step 1/6 : FROM node:12-alpine
12-alpine: Pulling from library/node
…
Digest: sha256:6b5b783c9cfe229af0bd5b0b677dd32005bb22d58465f3d0fe7fbd1c60ce068c
Status: Downloaded newer image for node:12-alpine
—> f77abbe89ac1
Step 2/6 : RUN apk --no-cache update && apk add --no-cache jq bash curl vim && rm -rf /var/cache/apk/* /tmp/*
—> Running in c7b098cca491
fetch

and it never progresses past this point. This isn’t an issue with the node:12-alpine image because I can run this same step locally. And I can even run it directly on the host that runs the k8s cluster. This step just seems to fail within the drone-plugin container of the drone pipeline.

Any ideas on the issue or how to resolve this?

Regards,
James

2

This is the last output we get from the build step in the pipeline, where the pipeline hangs and never progresses.

Step 1/6 : FROM node:12-alpine
12-alpine: Pulling from library/node
…
Digest: sha256:6b5b783c9cfe229af0bd5b0b677dd32005bb22d58465f3d0fe7fbd1c60ce068c
Status: Downloaded newer image for node:12-alpine
—> f77abbe89ac1
Step 2/6 : RUN apk --no-cache update && apk add --no-cache jq bash curl vim && rm -rf /var/cache/apk/* /tmp/*
—> Running in c7b098cca491
fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/main/x86_64/APKINDEX.tar.gz

3

I can run this same step locally. And I can even run it directly on the host that runs the k8s cluster. This step just seems to fail within the drone-plugin container of the drone pipeline.

As a side note, running docker build on the host is not necessarily an apples to apples comparison since the plugin uses docker-in-docker, which can have network implications. A better test would be to use the official docker:dind image (on which this plugin is based) inside a Pod and run docker build as the container command.