docs/modules/traits/pages/toleration.adoc

= Toleration Trait

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This trait sets Tolerations over Integration pods. Tolerations allow (but do not require) the pods to schedule onto nodes with matching taints.
See https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/ for more details.

The toleration should be expressed in a similar manner that of taints, i.e., `Key[=Value]:Effect[:Seconds]`, where values in square brackets are optional.

For examples:

- `node-role.kubernetes.io/master:NoSchedule`
- `node.kubernetes.io/network-unavailable:NoExecute:3000`
- `disktype=ssd:PreferNoSchedule`

It's disabled by default.


This trait is available in the following profiles: **Kubernetes, Knative, OpenShift**.

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== Configuration

Trait properties can be specified when running any integration with the CLI:
[source,console]
----
$ kamel run --trait toleration.[key]=[value] --trait toleration.[key2]=[value2] integration.groovy
----
The following configuration options are available:

[cols="2m,1m,5a"]
|===
|Property | Type | Description

| toleration.enabled
| bool
| Can be used to enable or disable a trait. All traits share this common property.

| toleration.taints
| []string
| The list of taints to tolerate, in the form `Key[=Value]:Effect[:Seconds]`

|===

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== Examples

* To tolerate the integration pod(s) to be scheduled on the master node:
+
[source,console]
$ kamel run -t toleration.taints="node-role.kubernetes.io/master:NoSchedule" ...

* To tolerate the integration pod(s) executing on a node with network not available for 300 seconds:
+
[source,console]
$ kamel run -t toleration.taints="node.kubernetes.io/network-unavailable:NoExecute:300" ...

* To tolerate the integration pod(s) to be scheduled on a node with a disk of SSD type:
+
[source,console]
$ kamel run -t toleration.taints="disktype=ssd:PreferNoSchedule" ...