{"action":"created","issue":{"url":"https://api.github.com/repos/coreos/coreos-kubernetes/issues/533","repository_url":"https://api.github.com/repos/coreos/coreos-kubernetes","labels_url":"https://api.github.com/repos/coreos/coreos-kubernetes/issues/533/labels{/name}","comments_url":"https://api.github.com/repos/coreos/coreos-kubernetes/issues/533/comments","events_url":"https://api.github.com/repos/coreos/coreos-kubernetes/issues/533/events","html_url":"https://github.com/coreos/coreos-kubernetes/issues/533","id":158923659,"number":533,"title":"kube-aws: Networking slower using 0.7 vs. 0.4","user":{"login":"four43","id":517006,"avatar_url":"https://avatars.githubusercontent.com/u/517006?v=3","gravatar_id":"","url":"https://api.github.com/users/four43","html_url":"https://github.com/four43","followers_url":"https://api.github.com/users/four43/followers","following_url":"https://api.github.com/users/four43/following{/other_user}","gists_url":"https://api.github.com/users/four43/gists{/gist_id}","starred_url":"https://api.github.com/users/four43/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/four43/subscriptions","organizations_url":"https://api.github.com/users/four43/orgs","repos_url":"https://api.github.com/users/four43/repos","events_url":"https://api.github.com/users/four43/events{/privacy}","received_events_url":"https://api.github.com/users/four43/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":16,"created_at":"2016-06-07T13:31:41Z","updated_at":"2016-06-10T20:14:47Z","closed_at":"2016-06-10T16:47:40Z","body":"Hey all,\r\n\r\nThis is going to be unfortunately vague, but we are seeing significantly slower networking performance from 0.7 (using Kubernetes 1.2.4 with and without Calico) compared to 0.4 (using Kubernetes 1.1.8). We've had a heck of a time tracking down the issue but our cluster's performance degrades on simple network operations when there is a slight volume increase. cAdvisor doesn't show anything out of the ordinary, from what I can tell in regards to the networking. Could it be something with the Kubernetes Network Policy? Is there something I can look at or check?\r\n\r\nI'm watching latency from pods to outside connections, those seem slow. Connection via ping to /_v1/ping seems quick however. There were previous issues in the Kubernetes repo about that. Seems like almost a bandwidth limitation or limitation in open sockets? nofiles seems set correctly however. I'm out of idea."},"comment":{"url":"https://api.github.com/repos/coreos/coreos-kubernetes/issues/comments/225284277","html_url":"https://github.com/coreos/coreos-kubernetes/issues/533#issuecomment-225284277","issue_url":"https://api.github.com/repos/coreos/coreos-kubernetes/issues/533","id":225284277,"user":{"login":"cgag","id":696309,"avatar_url":"https://avatars.githubusercontent.com/u/696309?v=3","gravatar_id":"","url":"https://api.github.com/users/cgag","html_url":"https://github.com/cgag","followers_url":"https://api.github.com/users/cgag/followers","following_url":"https://api.github.com/users/cgag/following{/other_user}","gists_url":"https://api.github.com/users/cgag/gists{/gist_id}","starred_url":"https://api.github.com/users/cgag/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cgag/subscriptions","organizations_url":"https://api.github.com/users/cgag/orgs","repos_url":"https://api.github.com/users/cgag/repos","events_url":"https://api.github.com/users/cgag/events{/privacy}","received_events_url":"https://api.github.com/users/cgag/received_events","type":"User","site_admin":false},"created_at":"2016-06-10T20:14:47Z","updated_at":"2016-06-10T20:14:47Z","body":"This issue was a great read, thanks a bunch @four43 for the detailed debugging breakdown.\r\n\r\nCan I ask what kind of scale you're working at that DNS became an issue?  I wonder if we should up the cpu limits on the DNS pod by default.  Maybe DNS should run as a daemonset?  I just googled that idea and found this issue: https://github.com/kubernetes/kubernetes/issues/26707, so it looks like it might be a fairly common problem. \r\n\r\n"}}
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