add rs.remove helper SERVER-1676

Conflicts:

	shell/mongo_vstudio.cpp

1 files changed, 18 insertions, 0 deletions

diff --git a/shell/utils.js b/shell/utils.js
index de26403afa6..0a22088d12c 100644
--- a/shell/utils.js
+++ b/shell/utils.js
@@ -1056,6 +1056,7 @@ rs.help = function () {
     print("\trs.add(membercfgobj)            add a new member to the set with extra attributes");
     print("\trs.addArb(hostportstr)          add a new member which is arbiterOnly:true");
     print("\trs.stepDown()                   step down as primary (momentarily)");
+    print("\trs.remove(hostportstr)          remove a host from the replica set");
     print("\trs.conf()                       return configuration from local.system.replset");
     print("\trs.slaveOk()                    shorthand for db.getMongo().setSlaveOk()");
     print();
@@ -1090,6 +1091,23 @@ rs.stepDown = function () { return db._adminCommand({ replSetStepDown:true}); }
 rs.addArb = function (hn) { return this.add(hn, true); }
 rs.conf = function () { return db.getSisterDB("local").system.replset.findOne(); }
 
+rs.remove = function (hn) { 
+    var local = db.getSisterDB("local");
+    assert(local.system.replset.count() <= 1, "error: local.system.replset has unexpected contents");
+    var c = local.system.replset.findOne();
+    assert(c, "no config object retrievable from local.system.replset");
+    c.version++;
+
+    for (var i in c.members) {
+        if (c.members[i].host == hn) {
+            c.members.splice(i, 1);
+            return db._adminCommand({ replSetReconfig : c});
+        }
+    }
+
+    return "error: couldn't find "+hn+" in "+tojson(c.members);
+};
+
 help = shellHelper.help = function (x) {
     if (x == "connect") {
         print("\nNormally one specifies the server on the mongo shell command line.  Run mongo --help to see those options.");