Can't ping container id

Rancher 1.x
1

Container ( ubuntu standard image )

test4:
image: ubuntu
stdin_open: true
tty: true

root@630b3ccdc7ec:/# hostname
630b3ccdc7ec
root@630b3ccdc7ec:/# ping 630b3ccdc7ec
ping: unknown host 630b3ccdc7ec

2

This has been fixed as part of: https://github.com/rancher/plugin-manager/commit/cb778172ccf24c765e37d1eb78ee949dc41a3fac

Please use the newer version of network-manager.