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Merge pull request #2084 from k82cn/k8s_54313_doc 

Doc about PID pressure taint.
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k8s-ci-robot 2018-05-20 19:40:49 -07:00 committed by GitHub
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contributors/design-proposals/scheduling/taint-node-by-condition.md
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@ -19,8 +19,8 @@ In addition to this, with taint-based-eviction, the Node Controller already tain
| ------------------ | ------------------ | ------------ | -------- |
|Ready |True | - | |
| |False | NoExecute | node.kubernetes.io/not-ready |
| |Unknown | NoExecute | node.kubernetes.io/unreachable |
|OutOfDisk |True | NoSchedule | node.kubernetes.io/out-of-disk |
| |Unknown | NoExecute | node.kubernetes.io/unreachable |
|OutOfDisk |True | NoSchedule | node.kubernetes.io/out-of-disk |
| |False | - | |
| |Unknown | - | |
|MemoryPressure |True | NoSchedule | node.kubernetes.io/memory-pressure |
@ -32,6 +32,9 @@ In addition to this, with taint-based-eviction, the Node Controller already tain
|NetworkUnavailable |True | NoSchedule | node.kubernetes.io/network-unavailable |
| |False | - | |
| |Unknown | - | |
|PIDPressure |True | NoSchedule | node.kubernetes.io/pid-pressure |
| |False | - | |
| |Unknown | - | |
For example, if a CNI network is not detected on the node (e.g. a network is unavailable), the Node Controller will taint the node with `node.kubernetes.io/network-unavailable=:NoSchedule`. This will then allow users to add a toleration to their `PodSpec`, ensuring that the pod can be scheduled to this node if necessary. If the kubelet did not update the node’s status after a grace period, the Node Controller will only taint the node with `node.kubernetes.io/unreachable`; it will not taint the node with any unknown condition.