Mimir Monolithic On Loopback, A Metric Written And Read Back

Grafana Mimir from the upstream release binary (sha256-verified) in monolithic mode as a hardened system service on loopback with filesystem storage, every ring member on loopback, usage reporting off. The live test pushes a gauge over OTLP, queries it back through the Prometheus API with its labels and sees an unknown metric answered empty. Original role, live-tested on Rocky Linux 10.

ansibleObservability

Verification

Live-tested

Really deployed to a container sandbox, proven idempotent (a second run changes nothing), verified against the role’s assertions, then torn down.

Conformance

  • Static validation (yamllint · ansible-lint)

Provenance

  • SHA-256 checksum
  • Signature (pending)

Functional

  • Live-tested - applied, verified, destroyed

Last verified 2026-09-20 · podman 4.9.3 · ansible 2.21.4 · how we verify

Cite it in your README

badge · attribution

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Ansible role 1.0.0, live-tested on IaC Bazaar: [Mimir Monolithic On Loopback, A Metric Written And Read Back](https://www.iac-bazaar.com/catalog/ansible-mimir?utm_source=syndication&utm_medium=readme&utm_campaign=artifact)

```yaml
# Mimir Monolithic On Loopback, A Metric Written And Read Back: https://www.iac-bazaar.com/catalog/ansible-mimir (download from your IaC Bazaar account)
```

Preview:IaC Bazaar: live-tested

Documentation

mimir

Grafana Mimir from the upstream release binary (sha256-verified), in monolithic mode as a hardened system service on loopback with filesystem storage, for a Prometheus remote-write or OTLP source on the same host or behind a proxy. Original role for EL 10, live-tested with podman on Rocky Linux 10.

No package, so the checksum is the whole story. EL 10 carries no mimir; Grafana ships a release with a checksum file beside it. The role downloads both and has Ansible's get_url refuse the binary unless its SHA-256 is the one in the vendor's file, then installs it as root's in /usr/local/bin, pinned by mimir_version.

A service account, a hardened unit, a loopback listener. mimir is a system user with no shell that owns the data directory and nothing else; the unit runs with NoNewPrivileges, PrivateTmp, ProtectHome and ProtectSystem=strict. The listener is 127.0.0.1:9009 by default, for a proxy that authenticates or a client on the same host; the live test reads the listening sockets and expects loopback only.

Every ring member says loopback. Mimir's components find each other through rings and advertise the address of the first interface they find, which on a host is not loopback: the query frontend then waits for queriers at an address nothing listens on and every query hangs. The role gives each ring (instance_addr), the query frontend (address) and memberlist (bind_addr, advertise_addr) 127.0.0.1 explicitly, and the live test reads the listening sockets and expects 9009, 9095 and 7946 on loopback only. Filesystem blocks, ruler and alertmanager stores must be distinct directories (Mimir refuses overlapping ones at start), and the activity tracker's file is pointed into the data directory, since ProtectSystem=strict makes the working directory read-only.

Proven by a metric. The live test pushes one gauge sample through the OTLP/HTTP receiver, queries it back through the Prometheus API with its resource and point labels, sees a metric nobody wrote answered with an empty result, and reads the pinned version from the build information. Filesystem storage is what Grafana calls development-grade; an object store is mimir_extra_config away, and usage reporting is off.

License

Commercial - IaC Bazaar EULA. (c) IaC Bazaar.

Usage code & full reference need an account

The complete copy-paste usage, the full input/output reference, and operational notes are free with an account - shown here and bundled in the download. Sign in and this section fills in.

  • Variables
  • Test

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