doc/cephadm: Quincy default images procedure

Address Adam King's request for version-specific
cephadm-container-image-retrieval procedures, which he requested here:
https://github.com/ceph/ceph/pull/57208#discussion_r1586614140

Signed-off-by: Zac Dover <zac.dover@proton.me>

diff --git a/doc/cephadm/services/monitoring.rst b/doc/cephadm/services/monitoring.rst
index 2da68aef3d1511c28386d636e71d1c8d352a12dd..1d232848fc9064c5ca080de7be2a066f582e085d 100644 (file)
--- a/doc/cephadm/services/monitoring.rst
+++ b/doc/cephadm/services/monitoring.rst
@@ -125,6 +125,40 @@ example spec file:
     spec:
       port: 4200
 
+.. _cephadm_default_images:
+
+Default images
+~~~~~~~~~~~~~~
+
+
+``cephadm`` stores a local copy of the ``cephadm`` binary in
+``var/lib/ceph/{FSID}/cephadm.{DIGEST}``, where ``{DIGEST}`` is an alphanumeric
+string representing the currently-running version of Ceph.
+
+To see the default container images, run a command of the following form:
+
+.. prompt:: bash #
+
+   grep -E "_IMAGE" /var/lib/ceph/{FSID}/cephadm.{DIGEST}
+
+::
+
+   DEFAULT_PROMETHEUS_IMAGE = 'quay.io/prometheus/prometheus:v2.51.0'
+   DEFAULT_LOKI_IMAGE = 'docker.io/grafana/loki:2.9.5'    
+   DEFAULT_PROMTAIL_IMAGE = 'docker.io/grafana/promtail:2.9.5'    
+   DEFAULT_NODE_EXPORTER_IMAGE = 'quay.io/prometheus/node-exporter:v1.7.0'    
+   DEFAULT_ALERT_MANAGER_IMAGE = 'quay.io/prometheus/alertmanager:v0.27.0'   
+   DEFAULT_GRAFANA_IMAGE = 'quay.io/ceph/grafana:10.4.0'
+
+Default monitoring images are specified in
+``/src/cephadm/cephadmlib/constants.py`` and in
+``/src/pybind/mgr/cephadm/module.py``.
+
+*The information in this section was developed by Eugen Block in a thread on
+the [ceph-users] mailing list in April of 2024. The thread can be viewed here:*
+`[ceph-users] discussion about default monitoring images
+<https://lists.ceph.io/hyperkitty/list/ceph-users@ceph.io/thread/QGC66QIFBKRTPZAQMQEYFXOGZJ7RLWBN/>`_.
+
 .. _cephadm_monitoring-images:
 
 Using custom images