Add support for agentx to vmd.

This is based around VM-MIB from RFC7666,but  does not export the full
spec. People more knowledgeable of vmd are encouraged to expand on this.

1 files changed, 15 insertions, 2 deletions

diff --git a/usr.sbin/vmd/vm.conf.5 b/usr.sbin/vmd/vm.conf.5
index 348d13d51fe..8ad6cfbe118 100644
--- a/usr.sbin/vmd/vm.conf.5
+++ b/usr.sbin/vmd/vm.conf.5
@@ -1,4 +1,4 @@
-.\" $OpenBSD: vm.conf.5,v 1.53 2020/02/16 11:03:25 kn Exp $
+.\" $OpenBSD: vm.conf.5,v 1.54 2020/09/23 15:52:06 martijn Exp $
 .\"
 .\" Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org>
 .\" Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org>
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: February 16 2020 $
+.Dd $Mdocdate: September 23 2020 $
 .Dt VM.CONF 5
 .Os
 .Sh NAME
@@ -91,6 +91,19 @@ vm "vm1.example.com" {
 .Sh GLOBAL CONFIGURATION
 The following setting can be configured globally:
 .Bl -tag -width Ds
+.It Ic agentx Oo Ic context Ar context Oc Oo Ic path Ar path Oc
+Export vm metrics via an agentx compatible
+.Pq snmp
+daemon by connecting to
+.Ar path .
+Metrics can be found under the vmMIB subtree
+.Pq mib-2.236 .
+If
+.Ar path
+is omitted it will default to
+.Pa /var/agentx/master .
+.Ar Context
+is the SNMPv3 context and can usually be omitted.
 .It Ic local prefix Ar address Ns Li / Ns Ar prefix
 Set the network prefix that is used to allocate subnets for
 local interfaces, see