Upgrade the Collector

When you're ready to upgrade the Collector to a new version, determine your current version before upgrading. You can then upgrade the Collector based on your installation method.

Determine your current version

To determine the current version of your Collector, you can:

• Check your manifest
• Use the debug endpoint
• Use Metrics Explorer

Check your manifest

Open your Collector manifest and locate the spec.template.spec.containers.env.image YAML collection. The string includes vVERSION, where VERSION is the Collector version number:

spec:
...
  template:
    spec:
      containers:
      - env:
        image: gcr.io/chronosphereio/chronocollector:vVERSION

• VERSION is the current version number of the Collector.

Use the debug endpoint

The Collector exposes a debug endpoint that you can query to return the Collector version. To query this endpoint, run the following request:

curl -X GET http://LISTEN_ADDRESS/debug/version

• LISTEN_ADDRESS: the listenAddress is the address that the Collector serves requests on. Default: 0.0.0.0:3030.

The response is a JSON representation of the Collector version information, which is the same information the Collector prints when starting. For example:

{
    "go_version": "go1.19.2",
    "version": "v0.99.0",
    "branch": "HEAD",
    "revision": "f2665b5e3",
    "build_date": "2023-01-19-22:35:10",
    "build_time": "1674167710"
}

Use Metrics Explorer

1. In the navigation menu select Metrics > Explorer to access the Metrics Explorer.

2. Enter the following query in the query field.

   count(chronocollector_build_information) by (build_version, instance)

3. Click Run query.

   The version of each Collector instance displays in the build_version column of the query results table. For example:

   Time	build_version	instance
   2023-02-15 11:07:15	v0_99_0	test-env/chronocollector-test3-2z8dx
   2023-02-15 11:07:15	v0_90_0	test-env/chronocollector-test3-4vcd9

Upgrade to a new version

After determining your current version, you're ready to upgrade your Collector. Your installation method determines how you upgrade the Collector.

Upgrade a Kubernetes deployment

If you deployed your Collector as a Kubernetes DaemonSet or Deployment, complete the following steps to upgrade your Collector.

1. Open your Collector manifest and locate the spec.template.spec.containers.env.image YAML collection.

2. In the image string, modify the version number to the version that you want to upgrade to. For example, the following image indicates version 0.99.0 of the Collector:

   spec:
   ...
     template:
       spec:
         containers:
         - env:
           image: gcr.io/chronosphereio/chronocollector:v0.99.0

3. Complete a rolling restart of your pods:

   kubectl rollout restart daemonset chronocollector -n NAMESPACE
   • NAMESPACE is your Kubernetes namespace.

4. Re-enable port forwarding for your Collector. The following command enables port forwarding on port 3030:

   kubectl port-forward chronocollector-POD_NAME 3030

Upgrade a standalone deployment

If you deployed your Collector as a standalone binary, download the latest version and redeploy the Collector.

Refer to the Standalone Collector installation page for steps on how to download the latest binary and redeploy it.

Upgrade Collectors to v0.104.0 or later

By default, older versions of Collector used Kubernetes' older Endpoints API for endpoint discovery. In Collector v0.85.0, Chronosphere introduced support for the newer EndpointSlices API of Kubernetes v1.21 and later, the configuration of which included setting the Collector flag useEndpointSlices to true and configuring your ClusterRole resources to use EndpointSlices, such as in the steps to Enable ServiceMonitor discovery.

Collector v0.104.0 and later exclusively use the EndpointSlices API (opens in a new tab) and ignore the useEndpointSlices setting. If you've enabled endpoint discovery but haven't enabled and configured EndpointSlices, this is a breaking change from older versions of Collector.

Upgrade proxy Collectors to v0.101.0 or later

The v0.101.0 release introduces a new Protocol Buffer (Protobuf) format for Collector-to-Collector communication. This Protobuf format aligns with the Prometheus format.

To upgrade when using proxy Collectors:

1. Upgrade all proxy Collectors to v0.101.0 or later.

   After upgrading to v0.101.0 or later, the proxy Collectors can safely support the old and new Protobuf formats. Upgrading the proxy tier doesn't affect scraping Collectors.

2. Upgrade all downstream scraping Collectors that communicate with the proxy tier.

   The upgraded scraping Collectors can now use the new Protobuf format to communicate with the proxy Collectors.

Collector proxy deployment

The following diagram illustrates an architecture where scraping Collectors communicate with proxy Collectors: