Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.

Operator and user guide

Tools

Mimir-continuous-test

Open source

Grafana mimir-continuous-test

As a developer, you can use the standalone mimir-continuous-test tool to run smoke tests on live Grafana Mimir clusters. This tool identifies a class of bugs that could be difficult to spot during development. Two operating modes are supported:

As a continuously running deployment in your environment, mimir-continuous-test can be used to detect issues on a live Grafana Mimir cluster over time.
As an ad-hoc smoke test tool, mimir-continuous-test can be used to validate basic functionality after configuration changes are made to a Grafana Mimir cluster.

Download mimir-continuous-test

Using Docker:

docker pull "grafana/mimir-continuous-test:latest"

Using a local binary:

Download the appropriate mimir-continuous-test binary for your operating system and architecture, and make it executable.

For Linux with the AMD64 architecture, execute the following command:

curl -Lo mimir-continuous-test https://github.com/grafana/mimir/releases/latest/download/mimir-continuous-test-linux-amd64
chmod +x mimir-continuous-test

Configure mimir-continuous-test

Mimir-continuous-test requires the endpoints of the backend Grafana Mimir clusters and the authentication for writing and querying testing metrics:

Set -tests.write-endpoint to the base endpoint on the write path. Remove any trailing slash from the URL. The tool appends the specific API path to the URL, for example /api/v1/push for the remote-write API.
Set -tests.read-endpoint to the base endpoint on the read path. Remove any trailing slash from the URL. The tool appends the specific API path to the URL, for example /api/v1/query_range for the range-query API.
Set the authentication means to use to write and read metrics in tests. By priority order:
- -tests.bearer-token for bearer token authentication.
- -tests.basic-auth-user and -tests.basic-auth-password for a basic authentication.
- -tests.tenant-id to the tenant ID, default to anonymous.
Set -tests.smoke-test to run the test once and immediately exit. In this mode, the process exit code is non-zero when the test fails.

Note: You can run mimir-continuous-test -help to list all available configuration options.

How it works

Mimir-continuous-test periodically runs a suite of tests, writes data to Mimir, queries that data back, and checks if the query results match what is expected. The tool exposes metrics that you can use to alert on test failures, and the tool logs the details about the failed tests.

Exported metrics

Mimir-continuous-test exposes the following Prometheus metrics at the /metrics endpoint listening on the port that you configured via the flag -server.metrics-port:

# HELP mimir_continuous_test_writes_total Total number of attempted write requests.
# TYPE mimir_continuous_test_writes_total counter
mimir_continuous_test_writes_total{test="<name>"}
{test="<name>"}

# HELP mimir_continuous_test_writes_failed_total Total number of failed write requests.
# TYPE mimir_continuous_test_writes_failed_total counter
mimir_continuous_test_writes_failed_total{test="<name>",status_code="<code>"}

# HELP mimir_continuous_test_queries_total Total number of attempted query requests.
# TYPE mimir_continuous_test_queries_total counter
mimir_continuous_test_queries_total{test="<name>"}

# HELP mimir_continuous_test_queries_failed_total Total number of failed query requests.
# TYPE mimir_continuous_test_queries_failed_total counter
mimir_continuous_test_queries_failed_total{test="<name>"}

# HELP mimir_continuous_test_query_result_checks_total Total number of query results checked for correctness.
# TYPE mimir_continuous_test_query_result_checks_total counter
mimir_continuous_test_query_result_checks_total{test="<name>"}

# HELP mimir_continuous_test_query_result_checks_failed_total Total number of query results failed when checking for correctness.
# TYPE mimir_continuous_test_query_result_checks_failed_total counter
mimir_continuous_test_query_result_checks_failed_total{test="<name>"}