Thanos Manifests

This repository provides Kustomize base to deploy Prometheus + Thanos and example overlays for general deployment in either AWS or GCP.

Using https://github.com/thanos-io/kube-thanos/tree/main/examples/all/manifests as upstream inspiration.

Usage

To use the base, reference the remote in your kustomization.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
  - github.com/utilitywarehouse/thanos-manifests/base?ref=master

You then MUST patch the following resources:

Prometheus PROMETHEUS_URL envvar
Thanos Rule ALERTMANAGER_URL envvar
Thanos Rule THANOS_QUERY_URL envvar

You MUST provide the following ConfigMaps:

alerts
prometheus
thanos-rule-alerts
thanos-rule
thanos-storage
thanos-query

Alert files MUST have .yaml extension.

Refer to AWS Configuration and GCP Configuration for provider specific requirements.

Additional Components

You will find that the base actually pulls each individual component as a sub- base. The reason for this is so that we can add additional components without having to deploy the entire stack.

The prime example of this is adding an extra set of a prometheus, thanos-storage and thanos-compact stack which can be used with a separate configuration. You can reference the more specific bases:

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
  - github.com/utilitywarehouse/thanos-manifests/base/prometheus?ref=master
  - github.com/utilitywarehouse/thanos-manifests/base/thanos-store?ref=master
  - github.com/utilitywarehouse/thanos-manifests/base/thanos-compact?ref=master

Note that in this case you must still follow the configuration instructions in the previous section, ignoring any parts for thanos-rule and thanos-query.

Enabling remote-write with thanos-receive

The other optional component is thanos-receive, that provides a prometheus' remote-write endpoint.

To deploy it, add the thanos-receive sub-base to your kustomize, and apply any patches that may be needed (in UW's case, the SA and STS labels to get S3 credentials from vault)

AWS configuration (UW specifc)

Patch the following to provide AWS credentials via Vault as outlined in vault-aws.md:

Prometheus ServiceAccount and StatefulSet
Thanos Compact ServiceAccount and Deployment
Thanos Store ServiceAccount and StatefulSet

For a full example of a Kustomize overlay please refer to the example.

GCP configuration

A secret thanos-storage containing credentials.json
Patch Prometheus, Thanos Compact and Thanos Store with a volume and volumeMount, to provide credentials.json from the thanos-storage secret.

For a full example of a Kustomize overlay please refer to the example.

Requires

https://github.com/kubernetes-sigs/kustomize

go get -u sigs.k8s.io/kustomize

Migration to v0.4.0 notes

On migration to v0.4.0 run thanos compact with --index.generate-missing-cache-file, it will make your Thanos Store start up blazingly fast.

New Compactor flag: --index.generate-missing-cache-file was added to allow quicker addition of index cache files. If enabled it precomputes missing files on compactor startup. Note that it will take time and it's only one-off step per bucket.

Also make sure to adjust:

--index-cache-size
--chunk-pool-size

Previously Cache limiting wasn't working properly and in v0.4.0 it's fixed and by default limits to 250MB.

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