From a7907403576e4f29882b6b327c2a9b88b2811d1a Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Wed, 6 Mar 2019 16:21:31 -0600
Subject: [PATCH] mon/MonmapMonitor: add 'ceph mon set-addrs <name> <addrvec>'
 command

This lets us explicitly adjust the IPs/ports a monitor binds to.

Signed-off-by: Sage Weil <sage@redhat.com>
---
 src/mon/MonCommands.h    |  5 +++++
 src/mon/MonmapMonitor.cc | 31 +++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/src/mon/MonCommands.h b/src/mon/MonCommands.h
index d03b901dcb2..38f605bed9b 100644
--- a/src/mon/MonCommands.h
+++ b/src/mon/MonCommands.h
@@ -458,6 +458,11 @@ COMMAND("mon set-rank " \
 	"name=rank,type=CephInt",
 	"set the rank for the specified mon",
 	"mon", "rw")
+COMMAND("mon set-addrs " \
+	"name=name,type=CephString " \
+	"name=addrs,type=CephString",
+	"set the addrs (IPs and ports) a specific monitor binds to",
+	"mon", "rw")
 COMMAND("mon enable-msgr2",
 	"enable the msgr2 protocol on port 3300",
 	"mon", "rw")
diff --git a/src/mon/MonmapMonitor.cc b/src/mon/MonmapMonitor.cc
index 0c44894dab1..9298f244211 100644
--- a/src/mon/MonmapMonitor.cc
+++ b/src/mon/MonmapMonitor.cc
@@ -751,6 +751,37 @@ bool MonmapMonitor::prepare_command(MonOpRequestRef op)
     pending_map.set_rank(name, rank);
     pending_map.last_changed = ceph_clock_now();
     propose = true;
+  } else if (prefix == "mon set-addrs") {
+    string name;
+    string addrs;
+    if (!cmd_getval(g_ceph_context, cmdmap, "name", name) ||
+	!cmd_getval(g_ceph_context, cmdmap, "addrs", addrs)) {
+      err = -EINVAL;
+      goto reply;
+    }
+    if (!pending_map.contains(name)) {
+      ss << "mon." << name << " does not exist";
+      err = -ENOENT;
+      goto reply;
+    }
+    entity_addrvec_t av;
+    if (!av.parse(addrs.c_str(), nullptr)) {
+      ss << "failed to parse addrs '" << addrs << "'";
+      err = -EINVAL;
+      goto reply;
+    }
+    for (auto& a : av.v) {
+      a.set_nonce(0);
+      if (!a.get_port()) {
+	ss << "monitor must bind to a non-zero port, not " << a;
+	err = -EINVAL;
+	goto reply;
+      }
+    }
+    err = 0;
+    pending_map.set_addrvec(name, av);
+    pending_map.last_changed = ceph_clock_now();
+    propose = true;
   } else if (prefix == "mon enable-msgr2") {
     if (!monmap.get_required_features().contains_all(
 	  ceph::features::mon::FEATURE_NAUTILUS)) {
-- 
2.39.5