Merge pull request #662 from paulfantom/disable-remote-read

remove remote_read option and point to use direct queries for data retrieval

Author: paulfantom

chart/Chart.yaml

@@ -12,7 +12,7 @@ keywords:
   - monitoring
   - tracing
   - opentelemetry
-version: 17.24.0
+version: 18.0.0
 # TODO(paulfantom): Enable after kubernetes 1.22 reaches EOL (2022-10-28)
 # kubeVersion: ">= 1.23.0"
 dependencies:

chart/README.md

@@ -253,8 +253,6 @@ of the [Promscale](https://github.com/timescale/promscale) repo.
 | `kube-prometheus-stack.prometheus.prometheusSpec.scrapeTimeout`                                                   | Prometheus scrape timeout                                                                                                                          | `10s`                                                                            |
 | `kube-prometheus-stack.prometheus.prometheusSpec.evaluationInterval`                                              | Prometheus evaluation interval                                                                                                                     | `1m`                                                                             |
 | `kube-prometheus-stack.prometheus.prometheusSpec.retention`                                                       | Prometheus data retention                                                                                                                          | `1d`                                                                             |
-| `kube-prometheus-stack.prometheus.prometheusSpec.remoteRead[0].readRecent`                                        | Whether reads should be made for queries for time ranges that the local storage should have complete data for.                                     | `true`                                                                           |
-| `kube-prometheus-stack.prometheus.prometheusSpec.remoteRead[0].url`                                               | The Prometheus URL of the endpoint to query from.                                                                                                  | `"http://{{ .Release.Name }}-promscale.{{ .Release.Namespace }}.svc:9201/read"`  |
 | `kube-prometheus-stack.prometheus.prometheusSpec.remoteWrite[0].queueConfig.batchSendDeadline`                    | BatchSendDeadline is the maximum time a sample will wait in buffer.                                                                                | `"30s"`                                                                          |
 | `kube-prometheus-stack.prometheus.prometheusSpec.remoteWrite[0].queueConfig.capacity`                             | Capacity is the number of samples to buffer per shard before we start dropping them.                                                               | `100000`                                                                         |
 | `kube-prometheus-stack.prometheus.prometheusSpec.remoteWrite[0].queueConfig.maxBackoff`                           | MaxBackoff is the maximum retry delay.                                                                                                             | `"10s"`                                                                          |

chart/values.yaml

@@ -215,10 +215,9 @@ kube-prometheus-stack:
           operator: DoesNotExist
       # The remote_read spec configuration for Prometheus.
       # ref: https://github.com/prometheus-operator/prometheus-operator/blob/master/Documentation/api.md#remotereadspec
-      remoteRead:
-        # - {protocol}://{host}:{port}/{endpoint}
-        - url: "http://{{ .Release.Name }}-promscale.{{ .Release.Namespace }}.svc:9201/read"
-          readRecent: false
+      # remoteRead:
+      #  - url: "http://{{ .Release.Name }}-promscale.{{ .Release.Namespace }}.svc:9201/read"
+      #    readRecent: false
       # The remote_write spec configuration for Prometheus.
       # ref: https://github.com/prometheus-operator/prometheus-operator/blob/master/Documentation/api.md#remotewritespec
       remoteWrite:

docs/upgrades.md

@@ -8,6 +8,19 @@ Firstly upgrade the helm repo to pull the latest available tobs helm chart. We a
 helm repo update
 ```
 
+## Upgrading from 17.x to 18.x
+
+To get the best performance out of promscale we recommend to query it directly. Since tobs is already shipping grafana datasource configured this way, there is no need to configure `remote_read` option in prometheus. This is a breaking change for people using `remote_read` option. If you need to use `remote_read` option, you can still add it back by putting the following code snippet into your `values.yaml` file.
+
+```yaml
+kube-prometheus-stack:
+  prometheus:
+    prometheusSpec:
+      remoteRead:
+        - url: "http://{{ .Release.Name }}-promscale.{{ .Release.Namespace }}.svc:9201/read"
+          readRecent: false
+```
+
 ## Upgrading from 16.x to 17.x
 
 With `17.0.0` we decided to diverge from gathering metrics data only from