doc/glossary: add "Quorum" to glossary

Add the term "Quorum" to the glossary and link to the part of
architecture.rst concerning Monitors. The sticky header at the top of
the docs.ceph.com website gets in the way of the location linked to in
this commit, but fatigue and disgust prevent me from spending time today
trial-and-erroring my way through the hostile and ill-documented
wilderness of scroll-margin so that the link goes where it should.

Co-authored-by: Anthony D'Atri <anthony.datri@gmail.com>
Signed-off-by: Zac Dover <zac.dover@proton.me>
(cherry picked from commit c2f6a770bf0e12296c334d99ac86ff4732ec29b7)

diff --git a/doc/architecture.rst b/doc/architecture.rst
index 1c5af8d380320a7b9a8cbd872c43825df14cf32d..6910bc18da0bf27c39e716583248e95f342246fe 100644 (file)
--- a/doc/architecture.rst
+++ b/doc/architecture.rst
@@ -30,6 +30,8 @@ A Ceph Storage Cluster consists of multiple types of daemons:
 - :term:`Ceph Manager`
 - :term:`Ceph Metadata Server`
 
+.. _arch_monitor:
+
 Ceph Monitors maintain the master copy of the cluster map, which they provide
 to Ceph clients. Provisioning multiple monitors within the Ceph cluster ensures
 availability in the event that one of the monitor daemons or its host fails.

diff --git a/doc/glossary.rst b/doc/glossary.rst
index 76a2d90567191e5c320b11577a0f99d0e824120d..9e5fdab5d7f3eb37161f7195d82e28cdbfc64a14 100644 (file)
--- a/doc/glossary.rst
+++ b/doc/glossary.rst
@@ -273,7 +273,7 @@
                 The Ceph manager software, which collects all the state from
                 the whole cluster in one place.
 
-       MON
+       :ref:`MON<arch_monitor>`
                The Ceph monitor software.
 
        Node
@@ -339,6 +339,12 @@
                 Firefly (v. 0.80). See :ref:`Primary Affinity
                 <rados_ops_primary_affinity>`.
 
+        Quorum 
+                Quorum is the state that exists when a majority of the
+                :ref:`Monitors<arch_monitor>` in the cluster are ``up``. A
+                minimum of three :ref:`Monitors<arch_monitor>` must exist in
+                the cluster in order for Quorum to be possible.
+
        RADOS
                 **R**\eliable **A**\utonomic **D**\istributed **O**\bject
                 **S**\tore. RADOS is the object store that provides a scalable