gnu: Add galera.

* gnu/packages/databases.scm (galera): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/databases.scm

@@ -48,6 +48,7 @@
 ;;; Copyright © 2020 Vincent Legoll <vincent.legoll@gmail.com>
 ;;; Copyright © 2021 Sharlatan Hellseher <sharlatanus@gmail.com>
 ;;; Copyright © 2021 Greg Hogan <code@greghogan.com>
+;;; Copyright © 2021 David Larsson <david.larsson@selfhosted.xyz>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1002,6 +1003,31 @@ (define-public mariadb-connector-c
 developed in C/C++ to MariaDB and MySQL databases.")
     (license license:lgpl2.1+)))
 
+(define-public galera
+  (package
+    (name "galera")
+    (version "26.4.7")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (commit "bac8171266cb982fe013ce496d78085438c6f23e")
+                    (url "https://github.com/codership/galera")
+                    (recursive? #t)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32 "0h7s670pcasq8wzprhyxqfca2cghi62b8xz2kikb2a86wd453qil"))))
+    (build-system cmake-build-system)
+    (inputs
+     `(("check" ,check)
+       ("boost" ,boost)
+       ("openssl" ,openssl)))
+    (home-page "https://github.com/codership/galera/")
+    (synopsis "Extension to the MariaDB database server")
+    (description
+     "Galera is a wsrep-provider that is used with MariaDB for load-balancing
+and high-availability (HA).")
+    (license license:gpl2)))                  ;'COPYING' says "version 2" only
+
 ;; Don't forget to update the other postgresql packages when upgrading this one.
 (define-public postgresql-13
   (package