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Title\r\n\r\nDNS is very slow and lookup domain name timeout in standalone k8s.  \r\n\r\n### General Information\r\n\r\n- Cilium version (run `cilium version`): 1.1.0\r\n- Kernel version (run `uname -a`):Linux ip-10-12-3-68 4.13.0-45-generic #50~16.04.1-Ubuntu SMP Wed May 30 11:18:27 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux\r\n- Orchestration system version in use (e.g. `kubectl version`, Mesos, ...): k8s 1.10.2\r\n- Link to relevant artifacts (policies, deployments scripts, ...)\r\n- Upload a system dump (run `curl -sLO\r\nreleases.cilium.io/tools/cluster-diagnosis.zip &&\r\npython cluster-diagnosis.zip sysdump` and then attach the generated zip file)\r\n\r\n### How to reproduce the issue\r\n\r\n1. Start a standalone k8s node\r\n2. Our program will keep downloading images from different urls\r\n3. After a while(3 ~ 5 hours), our program will report lookup domain name timeout\r\n4. If we use flannel, that won't happen"},"comment":{"url":"https://api.github.com/repos/cilium/cilium/issues/comments/403788238","html_url":"https://github.com/cilium/cilium/issues/4782#issuecomment-403788238","issue_url":"https://api.github.com/repos/cilium/cilium/issues/4782","id":403788238,"node_id":"MDEyOklzc3VlQ29tbWVudDQwMzc4ODIzOA==","user":{"login":"tgraf","id":1417913,"node_id":"MDQ6VXNlcjE0MTc5MTM=","avatar_url":"https://avatars1.githubusercontent.com/u/1417913?v=4","gravatar_id":"","url":"https://api.github.com/users/tgraf","html_url":"https://github.com/tgraf","followers_url":"https://api.github.com/users/tgraf/followers","following_url":"https://api.github.com/users/tgraf/following{/other_user}","gists_url":"https://api.github.com/users/tgraf/gists{/gist_id}","starred_url":"https://api.github.com/users/tgraf/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tgraf/subscriptions","organizations_url":"https://api.github.com/users/tgraf/orgs","repos_url":"https://api.github.com/users/tgraf/repos","events_url":"https://api.github.com/users/tgraf/events{/privacy}","received_events_url":"https://api.github.com/users/tgraf/received_events","type":"User","site_admin":false},"created_at":"2018-07-10T11:19:11Z","updated_at":"2018-07-10T11:19:11Z","author_association":"MEMBER","body":"@swimablefish Do you happen to have a tcpdump capture of a slow DNS request?\r\n\r\nI couldn't spot anything unusual in the sysdump besides the conntrack table being somewhat large with 200K entries. This could indicate that TCP connections are not closed properly or Cilium doesn't see the connection close properly."}}
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