From: "Fabian Grünbichler" <f.gruenbichler@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [RFC cluster 2/2] fix #4886: SSH: pin node's host key if available
Date: Thu, 21 Dec 2023 10:53:13 +0100 [thread overview]
Message-ID: <20231221095313.156390-3-f.gruenbichler@proxmox.com> (raw)
In-Reply-To: <20231221095313.156390-1-f.gruenbichler@proxmox.com>
if the target node has already stored their SSH host key on pmxcfs, pin it and
ignore the global known hosts information.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
---
src/PVE/SSHInfo.pm | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/src/PVE/SSHInfo.pm b/src/PVE/SSHInfo.pm
index c351148..fad23bf 100644
--- a/src/PVE/SSHInfo.pm
+++ b/src/PVE/SSHInfo.pm
@@ -49,11 +49,24 @@ sub get_ssh_info {
sub ssh_info_to_command_base {
my ($info, @extra_options) = @_;
+
+ my $nodename = $info->{name};
+
+ my $known_hosts_file = "/etc/pve/nodes/$nodename/ssh_known_hosts";
+ my $known_hosts_options = undef;
+ if (-f $known_hosts_file) {
+ $known_hosts_options = [
+ '-o', "UserKnownHostsFile=$known_hosts_file",
+ '-o', 'GlobalKnownHostsFile=none',
+ ];
+ }
+
return [
'/usr/bin/ssh',
'-e', 'none',
'-o', 'BatchMode=yes',
- '-o', 'HostKeyAlias='.$info->{name},
+ '-o', 'HostKeyAlias='.$nodename,
+ defined($known_hosts_options) ? @$known_hosts_options : (),
@extra_options
];
}
--
2.39.2
next prev parent reply other threads:[~2023-12-21 9:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-21 9:53 [pve-devel] [RFC cluster 0/2] fix #4886: improve SSH handling Fabian Grünbichler
2023-12-21 9:53 ` [pve-devel] [RFC cluster 1/2] fix #4886: write node SSH hostkey to pmxcfs Fabian Grünbichler
2023-12-21 9:53 ` Fabian Grünbichler [this message]
[not found] ` <mailman.334.1704776560.335.pve-devel@lists.proxmox.com>
2024-01-09 8:57 ` [pve-devel] [RFC cluster 0/2] fix #4886: improve SSH handling Fabian Grünbichler
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