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new 2e7106e [YUNIKORN-924] Application stateaware disable tag (#85)
2e7106e is described below
commit 2e7106e0e4edd6b170382653d69e38bbc2178cff
Author: Craig Condit <[email protected]>
AuthorDate: Tue Oct 26 17:53:25 2021 -0500
[YUNIKORN-924] Application stateaware disable tag (#85)
---
docs/design/k8shim.md | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/docs/design/k8shim.md b/docs/design/k8shim.md
index 39ca4d1..4e9e7e7 100644
--- a/docs/design/k8shim.md
+++ b/docs/design/k8shim.md
@@ -41,18 +41,21 @@ The admission controller runs in a separate pod, it runs a
and a [validation
webhook](https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#validatingadmissionwebhook),
where:
1. The `mutation webhook` mutates pod spec by:
- - adding `schedulerName: yunikorn`
- - by explicitly specifying the scheduler name, the pod will be scheduled
by YuniKorn scheduler
- - adding `applicationId` label
- - when a label `applicationId` exists, reuse the given applicationId
- - when a label `spark-app-selector` exists, reuse the given spark app ID
- - otherwise, assign a generated application ID for this pod, using
convention: `yunikorn-<namespace>-autogen`. this is unique per namespace.
- - adding `queue` label
- - when a label `queue` exists, reuse the given queue name. Note, if
placement rule is enabled, values set in the label is ignored
- - otherwise, adds `queue: root.default`
+ - Adding `schedulerName: yunikorn`
+ - By explicitly specifying the scheduler name, the pod will be scheduled
by YuniKorn scheduler.
+ - Adding `applicationId` label
+ - When a label `applicationId` exists, reuse the given applicationId.
+ - When a label `spark-app-selector` exists, reuse the given spark app ID.
+ - Otherwise, assign a generated application ID for this pod, using
convention: `yunikorn-<namespace>-autogen`. This is unique per namespace.
+ - Adding `queue` label
+ - When a label `queue` exists, reuse the given queue name. Note, if
placement rule is enabled, values set in the label is ignored.
+ - Otherwise, adds `queue: root.default`
+ - Adding `disableStateAware` label
+ - If pod was assigned a generated applicationId by the admission
controller, also set `disableStateAware: true`. This causes the generated
application
+ to immediately transition from the `Starting` to `Running` state so
that it will not block other applications.
2. The `validation webhook` validates the configuration set in the configmap
- - this is used to prevent writing malformed configuration into the configmap
- - the validation webhook calls scheduler [validation REST
API](api/scheduler.md#configuration-validation) to validate configmap updates
+ - This is used to prevent writing malformed configuration into the
configmap.
+ - The validation webhook calls scheduler [validation REST
API](api/scheduler.md#configuration-validation) to validate configmap updates.
### Admission controller deployment
