[pve-devel] [RFC cluster 4/6] corosync: allow to set link priorities

[Thomas Lamprecht]

For now in passive mode, a link with a higher value has a lower
priority. If the current active link fails the one with the next
higher priority will take over.

Signed-off-by: Thomas Lamprecht <t.lamprecht at proxmox.com>
---
 data/PVE/Cluster.pm  |  7 +++++++
 data/PVE/Corosync.pm | 11 +++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/data/PVE/Cluster.pm b/data/PVE/Cluster.pm
index ddb6d2d..8e611d9 100644
--- a/data/PVE/Cluster.pm
+++ b/data/PVE/Cluster.pm
@@ -1853,6 +1853,13 @@ my $corosync_link_format = {
 	format_description => 'IP',
 	default => 'same as address',
     },
+    priority => {
+	optional => 1,
+	type => 'integer',
+	minimum => 0,
+	default => 0,
+	description => "The priority for the link when knet is used in 'passive' mode. Lower value means higher priority.",
+    },
 };
 my $corosync_link_desc = {
     type => 'string', format => $corosync_link_format,
diff --git a/data/PVE/Corosync.pm b/data/PVE/Corosync.pm
index 8752c64..64f0f7c 100644
--- a/data/PVE/Corosync.pm
+++ b/data/PVE/Corosync.pm
@@ -247,16 +247,23 @@ sub create_conf {
     my $link1 = PVE::Cluster::parse_corosync_link($param{link1});
     $link1->{bindnet} //= $link1->{address};
 
+    my $totem = $conf->{totem};
+
+    $totem->{interface}->{0}->{knet_link_priority} = $link0->{priority}
+	if defined($link0->{priority});
+
     if ($link1->{bindnet}) {
 	die "link 1 addresses must be from same IP family as link 0!\n"
 	    if $use_ipv6 != ip_is_ipv6($link1->{address}) ||
 	       $use_ipv6 != ip_is_ipv6($link1->{bindnet});
 
-	$conf->{totem}->{interface}->{1} = {
+	$totem->{interface}->{1} = {
 	    bindnetaddr => $link1->{bindnet},
 	    linknumber => 1,
 	};
-	$conf->{totem}->{link_mode} = 'passive';
+	$totem->{link_mode} = 'passive';
+	$totem->{interface}->{1}->{knet_link_priority} = $link1->{priority}
+	    if defined($link1->{priority});
 	$conf->{nodelist}->{node}->{$nodename}->{ring1_addr} = $link1->{address};
     }
 
-- 
2.20.1