Alertmanager On Loopback, Gossip Off
Prometheus Alertmanager from the upstream release (sha256-verified) as a hardened system service on loopback, its cluster gossip listener switched off and its configuration checked by amtool before it lands. The live test posts an alert through the API and reads it back active, held by the default receiver, and expects no 9094 listener at all. Original role, live-tested on Rocky Linux 10.
Verification
Live-testedReally 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 · attributionPaste this beside the module in the repository that uses it. The badge is rendered from this artifact's verification record, so it reads live-tested because the record says so, and the link lands on this page.
[](https://www.iac-bazaar.com/catalog/ansible-alertmanager?utm_source=syndication&utm_medium=readme&utm_campaign=artifact)
Ansible role 1.0.0, live-tested on IaC Bazaar: [Alertmanager On Loopback, Gossip Off](https://www.iac-bazaar.com/catalog/ansible-alertmanager?utm_source=syndication&utm_medium=readme&utm_campaign=artifact)
```yaml
# Alertmanager On Loopback, Gossip Off: https://www.iac-bazaar.com/catalog/ansible-alertmanager (download from your IaC Bazaar account)
```Preview:
Documentation
alertmanager
Prometheus Alertmanager from the upstream release tarball (sha256-verified),
as a system service on loopback with its cluster gossip listener switched
off and its configuration checked by amtool before it lands. 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
alertmanager; Prometheus ships a release with a checksum file beside it. The
role downloads both and has Ansible's get_url refuse the asset unless its
SHA-256 is the one in the vendor's file, then installs the binaries as
root's in /usr/local/bin, pinned by alertmanager_version.
A service account, a hardened unit, a loopback listener. alertmanager
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 127.0.0.1:9093 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.
The second listener nobody asked for. Alertmanager opens a gossip
listener on 0.0.0.0:9094 by default, for clustering, on every install
that never clusters. The role passes --cluster.listen-address= (empty),
which turns it off, and the live test reads the sockets and expects no
9094 at all. A cluster is a variable change (alertmanager_extra_args is
not needed; set the listen address and peers in the unit template).
Held, not lost. The default receiver has no integration, which
Alertmanager accepts: alerts are grouped and held and delivered nowhere
until you give the receiver a webhook (alertmanager_default_webhook_url)
or add receivers and routes of your own. The live test posts an alert
through the API and reads it back active, held by the default receiver,
the proof the routing tree loaded and ran.
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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