title: No internet connectivity inside docker container running inside kubernetes with weave as networking
body: <p>I have a kubernetes cluster that is running on AWS EC2 instances and weave as networking(cni). I have disabled the docker networking(ipmask and iptables) as it is managed by weave(to avoid network conflicts).
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  <p>I have deployed my Jenkins on this cluster as K8s pod and this jenkins uses jenkins kubernetes plugin to spawn dynamic slaves based on pod and container template which I have defined. These slaves container have docker client in it which connects to the host docker engine via docker.sock
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  <p>So when I run any job in Jenkins it starts a slave and on this it clones a git repo and starts building the Dockerfile present inside the repo. </p>
  
  <p>My sample dockerfile looks like this:</p>
  
  <pre><code>FROM abc:123
  RUN yum update
  </code></pre>
  
  <p>So when container starts building this it tries connecting to redhat repo to update the local repo and fails here. To debug I logged in to this container and try wget/CURL some packages and finds that there is no internet connectivity in this container.</p>
  
  <p>I suspect that while building docker starts intermediate containers and those containers are not managed by weave so they do not have internet connectivity.
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  <p>Need suggestions.
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  <p>Related question: <a href="https://stackoverflow.com/questions/47003225/internet-connection-inside-docker-container-in-kubernetes/47008722#47008722">Internet connection inside Docker container in Kubernetes</a></p>