[demo] add replicas support (open-telemetry#934)

* add replicas support

Signed-off-by: Pierre Tessier <[email protected]>

* note about replicas setting for postgres, kafka, and redis

Signed-off-by: Pierre Tessier <[email protected]>

---------

Signed-off-by: Pierre Tessier <[email protected]>

Author: puckpuck

charts/opentelemetry-demo/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 type: application
 name: opentelemetry-demo
-version: 0.25.8
+version: 0.25.9
 description: opentelemetry demo helm chart
 home: https://opentelemetry.io/
 sources:

charts/opentelemetry-demo/README.md

@@ -82,6 +82,7 @@ the demo
 | `default.image.tag`                    | Demo components image tag (leave blank to use app version)                                | `nil`                                                |
 | `default.image.pullPolicy`             | Demo components image pull policy                                                         | `IfNotPresent`                                       |
 | `default.image.pullSecrets`            | Demo components image pull secrets                                                        | `[]`                                                 |
+| `default.replicas`                     | Number of replicas for each component                                                     | `1`                                                  |
 | `default.schedulingRules.nodeSelector` | Node labels for pod assignment                                                            | `{}`                                                 |
 | `default.schedulingRules.affinity`     | Man of node/pod affinities                                                                | `{}`                                                 |
 | `default.schedulingRules.tolerations`  | Tolerations for pod assignment                                                            | `[]`                                                 |
@@ -117,6 +118,7 @@ component.
 | `ports`                              | Array of ports to open for deployment and service of this component                                        | `[]`                                                          |
 | `env`                                | Array of environment variables added to this component                                                     | Each component will have its own set of environment variables |
 | `envOverrides`                       | Used to override individual environment variables without re-specifying the entire array                   | `[]`                                                          |
+| `replicas`                           | Number of replicas for this component                                                                      | `1` for ffsPostgres, kafka, and redis ; `nil` otherwise       |
 | `resources`                          | CPU/Memory resource requests/limits                                                                        | Each component will have a default memory limit set           |
 | `schedulingRules.nodeSelector`       | Node labels for pod assignment                                                                             | `{}`                                                          |
 | `schedulingRules.affinity`           | Man of node/pod affinities                                                                                 | `{}`                                                          |