{"action":"created","comment":{"url":"https://api.github.com/repos/kubernetes/kubernetes/pulls/comments/49042433","id":49042433,"diff_hunk":"@@ -0,0 +1,294 @@\n+<!-- BEGIN MUNGE: UNVERSIONED_WARNING -->\n+\n+<!-- BEGIN STRIP_FOR_RELEASE -->\n+\n+<img src=\"http://kubernetes.io/img/warning.png\" alt=\"WARNING\"\n+     width=\"25\" height=\"25\">\n+<img src=\"http://kubernetes.io/img/warning.png\" alt=\"WARNING\"\n+     width=\"25\" height=\"25\">\n+<img src=\"http://kubernetes.io/img/warning.png\" alt=\"WARNING\"\n+     width=\"25\" height=\"25\">\n+<img src=\"http://kubernetes.io/img/warning.png\" alt=\"WARNING\"\n+     width=\"25\" height=\"25\">\n+<img src=\"http://kubernetes.io/img/warning.png\" alt=\"WARNING\"\n+     width=\"25\" height=\"25\">\n+\n+<h2>PLEASE NOTE: This document applies to the HEAD of the source tree</h2>\n+\n+If you are using a released version of Kubernetes, you should\n+refer to the docs that go with that version.\n+\n+<strong>\n+The latest release of this document can be found\n+[here](http://releases.k8s.io/release-1.1/docs/proposals/dedicated-nodes.md).\n+\n+Documentation for other releases can be found at\n+[releases.k8s.io](http://releases.k8s.io).\n+</strong>\n+--\n+\n+<!-- END STRIP_FOR_RELEASE -->\n+\n+<!-- END MUNGE: UNVERSIONED_WARNING -->\n+\n+# Taints, Tolerations, and Dedicated Nodes\n+\n+## Introduction\n+\n+This document describes *taints* and *tolerations*, which constitute a generic mechanism for restricting\n+the set of pods that can use a node. We also describe one concrete use case for the mechanism,\n+namely to limit the set of users (or more generally, authorization domains)\n+who can access a set of nodes (a feature we call\n+*dedicated nodes*). There are many other uses--for example, a set of nodes with a particular\n+piece of hardware could\n+be reserved for pods that require that hardware, or a node could be marked as inaccessible\n+to all pods when it is being drained before shutdown; see #17190 for more discussion.","path":"docs/proposals/dedicated-nodes.md","position":45,"original_position":45,"commit_id":"e61297663709b66670c73301d77660e5b44a8fe1","original_commit_id":"e61297663709b66670c73301d77660e5b44a8fe1","user":{"login":"bgrant0607","id":7725777,"avatar_url":"https://avatars.githubusercontent.com/u/7725777?v=3","gravatar_id":"","url":"https://api.github.com/users/bgrant0607","html_url":"https://github.com/bgrant0607","followers_url":"https://api.github.com/users/bgrant0607/followers","following_url":"https://api.github.com/users/bgrant0607/following{/other_user}","gists_url":"https://api.github.com/users/bgrant0607/gists{/gist_id}","starred_url":"https://api.github.com/users/bgrant0607/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bgrant0607/subscriptions","organizations_url":"https://api.github.com/users/bgrant0607/orgs","repos_url":"https://api.github.com/users/bgrant0607/repos","events_url":"https://api.github.com/users/bgrant0607/events{/privacy}","received_events_url":"https://api.github.com/users/bgrant0607/received_events","type":"User","site_admin":false},"body":"They could also represent machine software or hardware problems, like BadDisk, or abnormal node 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taints, and tolerations design proposal","user":{"login":"davidopp","id":8264113,"avatar_url":"https://avatars.githubusercontent.com/u/8264113?v=3","gravatar_id":"","url":"https://api.github.com/users/davidopp","html_url":"https://github.com/davidopp","followers_url":"https://api.github.com/users/davidopp/followers","following_url":"https://api.github.com/users/davidopp/following{/other_user}","gists_url":"https://api.github.com/users/davidopp/gists{/gist_id}","starred_url":"https://api.github.com/users/davidopp/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/davidopp/subscriptions","organizations_url":"https://api.github.com/users/davidopp/orgs","repos_url":"https://api.github.com/users/davidopp/repos","events_url":"https://api.github.com/users/davidopp/events{/privacy}","received_events_url":"https://api.github.com/users/davidopp/received_events","type":"User","site_admin":false},"body":"ref/ #17190 \r\n\r\nIt's helpful to read #18261 before this one.\r\n\r\n@bgrant0607 @mml @kevin-wangzefeng @alfred-huangjian @mikedanese @erimatnor @timothysc \r\n 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