nixos/zookeeper: Take the same JRE we build zookeeper with

nixos/doc/manual/from_md/release-notes/rl-2205.section.xml

@@ -1307,6 +1307,15 @@
           <literal>otelcorecol</literal> and enjoy a 7x smaller binary.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <literal>services.zookeeper</literal> has a new option
+          <literal>jre</literal> for specifying the JRE to start
+          zookeeper with. It defaults to the JRE built with
+          <literal>pkgs.zookeeper</literal> instead of
+          <literal>pkgs.jre</literal>.
+        </para>
+      </listitem>
       <listitem>
         <para>
           <literal>pkgs.pgadmin</literal> now refers to

nixos/doc/manual/release-notes/rl-2205.section.md

@@ -518,6 +518,10 @@ In addition to numerous new and upgraded packages, this release has the followin
   you should change the package you refer to. If you don't need them update your
   commands from `otelcontribcol` to `otelcorecol` and enjoy a 7x smaller binary.
 
+- `services.zookeeper` has a new option `jre` for specifying the JRE to start
+  zookeeper with. It defaults to the JRE built with `pkgs.zookeeper` instead of
+  `pkgs.jre`.
+
 - `pkgs.pgadmin` now refers to `pkgs.pgadmin4`. `pgadmin3` has been removed.
 
 - `pkgs.noto-fonts-cjk` is now deprecated in favor of `pkgs.noto-fonts-cjk-sans`

nixos/modules/services/misc/zookeeper.nix

@@ -114,6 +114,13 @@ in {
       type = types.package;
     };
 
+    jre = mkOption {
+      description = "The JRE with which to run Zookeeper";
+      default = cfg.package.passthru.jre;
+      defaultText = literalExpression "pkgs.zookeeper.passthru.jre";
+      example = literalExpression "pkgs.jre";
+      type = types.package;
+    };
   };
 
 
@@ -131,7 +138,7 @@ in {
       after = [ "network.target" ];
       serviceConfig = {
         ExecStart = ''
-          ${pkgs.jre}/bin/java \
+          ${cfg.jre}/bin/java \
             -cp "${cfg.package}/lib/*:${configDir}" \
             ${escapeShellArgs cfg.extraCmdLineOptions} \
             -Dzookeeper.datadir.autocreate=false \