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Cluster Creation failed : remote command exception

asked 2019-05-04 22:15:11 -0500

rogue0197 gravatar image

I have working Devstack configuration with Sahara Installed. When I try to launch Hadoop Clusters with MapR Image and Ambari Images , It fails with the following error

For Ambari Cluster

Creating cluster failed for the following reason(s): RemoteCommandException: Error during command execution: "/tmp/96c89e7e-36c1-48d1-a0f7-fbff8ae59fbe.sh" Return code: 1 STDERR: curl: (6) Could not resolve host: http://tarballs.openstack.org STDOUT: Could not download Swift Hadoop FS implementation. Aborting Error ID: 7b4069fb-fedc-46f2-9eee-25103e84384b Error ID: f131ae8a-1278-4228-8eef-78d6c8e87fb1

For MapR Cluster

Creating cluster failed for the following reason(s): RemoteCommandException: Error during command execution: "/tmp/3eb0ba2c-671b-45f4-8557-4c8fee933844.sh" Return code: 1 STDOUT: START: installing Scala https://www.scala-lang.org is unreachable Error ID: f0f2029f-2621-4c96-adb1-f882613519a8 Error ID: ba2d4657-71ab-4b4a-858c-0b679b938ddf

What Could be the Problem and How to solve it ? Thanks

  • I believe the problem is with the internet access in the instances launched by sahara.
  • I am able to ssh into instances in the local network. I am able to ping host machine from my instance.
  • But I can't ping http://google.com or http://github.com from the instance.
  • How do I get the external internet access in the instance so that it uses the host internet connectivity ?
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answered 2019-05-05 01:21:28 -0500

Bernd Bausch gravatar image

Sahara wants to download data from the internet, but your Devstack is not connected to the internet or doesn't resolve the two domain names openstack.org and scala-lang.org.

To connect Devstack to your network, see https://docs.openstack.org/devstack/l....

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Instead of PUBLIC_INTERFACE i have used FLAT_INTERFACEfrom https://docs.openstack.org/devstack/latest/guides/multinode-lab.html (https://docs.openstack.org/devstack/l...) Still I cant connect to network from instances. I have tried changing br-ex ip on to eno1 ip But no Use. Any other suggestions , where I am going wrong ?

rogue0197 gravatar imagerogue0197 ( 2019-05-06 00:16:06 -0500 )edit

Not sure, but perhaps you need to set both on the controller? Also, to access instances from outside:

HOST_IP=your-IP    
FLOATING_RANGE=your-floating-ip-range
PUBLIC_NETWORK_GATEWAY=your-gateway
Q_FLOATING_ALLOCATION_POOL=start=first-floating-ip,end=last-floating-ip
Bernd Bausch gravatar imageBernd Bausch ( 2019-05-06 01:07:47 -0500 )edit

By default, Devstack sets up an "external" network that is contained inside the Devstack host(s). I don't know how it works in a multi-node setup, but my guess is that you need to define the above floating ip parameters to connect it to the real external network.

Bernd Bausch gravatar imageBernd Bausch ( 2019-05-06 01:09:35 -0500 )edit

Alternatively, an old blog entry that sets up a DVR (distributed router) configuration on a multi-node Devstack, which seems to be connected to the internet: https://assafmuller.com/2015/04/06/mu....

Bernd Bausch gravatar imageBernd Bausch ( 2019-05-06 01:11:47 -0500 )edit
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Asked: 2019-05-04 21:40:50 -0500

Seen: 53 times

Last updated: May 05 '19

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