{"action":"created","issue":{"url":"https://api.github.com/repos/openshift/origin/issues/711","labels_url":"https://api.github.com/repos/openshift/origin/issues/711/labels{/name}","comments_url":"https://api.github.com/repos/openshift/origin/issues/711/comments","events_url":"https://api.github.com/repos/openshift/origin/issues/711/events","html_url":"https://github.com/openshift/origin/issues/711","id":55143325,"number":711,"title":"Unable to connection from a 'master' to minions when using OPENSHIFT_DEV_CLUSTER","user":{"login":"mfojtik","id":44136,"avatar_url":"https://avatars.githubusercontent.com/u/44136?v=3","gravatar_id":"","url":"https://api.github.com/users/mfojtik","html_url":"https://github.com/mfojtik","followers_url":"https://api.github.com/users/mfojtik/followers","following_url":"https://api.github.com/users/mfojtik/following{/other_user}","gists_url":"https://api.github.com/users/mfojtik/gists{/gist_id}","starred_url":"https://api.github.com/users/mfojtik/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mfojtik/subscriptions","organizations_url":"https://api.github.com/users/mfojtik/orgs","repos_url":"https://api.github.com/users/mfojtik/repos","events_url":"https://api.github.com/users/mfojtik/events{/privacy}","received_events_url":"https://api.github.com/users/mfojtik/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"mrunalp","id":53798,"avatar_url":"https://avatars.githubusercontent.com/u/53798?v=3","gravatar_id":"","url":"https://api.github.com/users/mrunalp","html_url":"https://github.com/mrunalp","followers_url":"https://api.github.com/users/mrunalp/followers","following_url":"https://api.github.com/users/mrunalp/following{/other_user}","gists_url":"https://api.github.com/users/mrunalp/gists{/gist_id}","starred_url":"https://api.github.com/users/mrunalp/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mrunalp/subscriptions","organizations_url":"https://api.github.com/users/mrunalp/orgs","repos_url":"https://api.github.com/users/mrunalp/repos","events_url":"https://api.github.com/users/mrunalp/events{/privacy}","received_events_url":"https://api.github.com/users/mrunalp/received_events","type":"User","site_admin":false},"milestone":null,"comments":5,"created_at":"2015-01-22T11:38:44Z","updated_at":"2015-01-22T21:30:57Z","closed_at":null,"body":"How to reproduce:\r\n\r\n1. export OPENSHIFT_DEV_CLUSTER=1\r\n2. vagrant up\r\n3. vagrant ssh master\r\n4. ping openshift-minion-1\r\n....\r\n4 packets transmitted, 0 received, 100% packet loss, time 3000ms\r\n\r\nThis is the same for openshift-minion-2. This seems to be random (after several vagrant halt/up, it sometimes works...)\r\n\r\nWe tracked it down into host NetworkManager, where the NetworkManager sees the VirtualBox devices and tries to manage them. If I add following into /etc/NetworkManager/NetworkManager.conf:\r\n\r\n```\r\n[keyfile]\r\nunmanaged-devices=mac:0a:00:27:00:00:00;mac:0a:00:27:00:00:01;mac:0a:00:27:00:00:02;mac:0a:00:27:00:00:03;mac:0a:00:27:00:00:04\r\n```\r\n\r\nwhere the MAC addresses are addresses of vboxnet# interfaces and I systemctl restart NetworkManager then the problem seems to go away and I can connect between minions and also from master to minions.\r\n\r\nAfter running `nmcli d` I see all vboxnet# devices as 'unmanaged'.\r\n\r\nWe should either update our Vagrant instructions to include this or fix the VirtualBox RPM to automatically update/install the config file with unmanaged-devices list.\r\n\r\n@rajatchopra @mrunalp ^^"},"comment":{"url":"https://api.github.com/repos/openshift/origin/issues/comments/71102878","html_url":"https://github.com/openshift/origin/issues/711#issuecomment-71102878","issue_url":"https://api.github.com/repos/openshift/origin/issues/711","id":71102878,"user":{"login":"goldmann","id":43489,"avatar_url":"https://avatars.githubusercontent.com/u/43489?v=3","gravatar_id":"","url":"https://api.github.com/users/goldmann","html_url":"https://github.com/goldmann","followers_url":"https://api.github.com/users/goldmann/followers","following_url":"https://api.github.com/users/goldmann/following{/other_user}","gists_url":"https://api.github.com/users/goldmann/gists{/gist_id}","starred_url":"https://api.github.com/users/goldmann/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/goldmann/subscriptions","organizations_url":"https://api.github.com/users/goldmann/orgs","repos_url":"https://api.github.com/users/goldmann/repos","events_url":"https://api.github.com/users/goldmann/events{/privacy}","received_events_url":"https://api.github.com/users/goldmann/received_events","type":"User","site_admin":false},"created_at":"2015-01-22T21:30:57Z","updated_at":"2015-01-22T21:30:57Z","body":"@mrunalp I guess [documenting this here](https://github.com/openshift/origin/blob/master/CONTRIBUTING.adoc) + an example would be fine since this is an [upstream bug](https://bugzilla.gnome.org/show_bug.cgi?id=731014)."}}