[pve-devel] [PATCH pve-network 06/15] dns: add update record && fix powerdns

Alexandre Derumier aderumier at odiso.com
Tue Jan 5 10:35:27 CET 2021


Signed-off-by: Alexandre Derumier <aderumier at odiso.com>
---
 PVE/Network/SDN/Dns/Plugin.pm         | 32 +++++++++-
 PVE/Network/SDN/Dns/PowerdnsPlugin.pm | 87 +++++++++++++++++++++++++--
 PVE/Network/SDN/Subnets.pm            |  7 ++-
 PVE/Network/SDN/Vnets.pm              |  4 +-
 4 files changed, 119 insertions(+), 11 deletions(-)

diff --git a/PVE/Network/SDN/Dns/Plugin.pm b/PVE/Network/SDN/Dns/Plugin.pm
index ef866b7..199c170 100644
--- a/PVE/Network/SDN/Dns/Plugin.pm
+++ b/PVE/Network/SDN/Dns/Plugin.pm
@@ -67,11 +67,39 @@ sub parse_section_header {
 
 
 sub add_a_record {
-    my ($class, $plugin_config, $type, $zone, $reversezone, $hostname, $ip) = @_;
+    my ($class, $plugin_config, $zone, $hostname, $ip) = @_;
+
+    die "please implement inside plugin";
+}
+
+sub add_ptr_record {
+    my ($class, $plugin_config, $zone, $hostname, $ip) = @_;
+
+    die "please implement inside plugin";
+}
+
+sub del_ptr_record {
+    my ($class, $plugin_config, $zone, $ip) = @_;
+
+    die "please implement inside plugin";
 }
 
 sub del_a_record {
-    my ($class, $plugin_config, $hostname, $ip) = @_;
+    my ($class, $plugin_config, $zone, $hostname, $ip) = @_;
+
+    die "please implement inside plugin";
+}
+
+sub verify_zone {
+    my ($class, $plugin_config, $zone) = @_;
+
+    die "please implement inside plugin";
+}
+
+sub get_reversedns_zone {
+    my ($class, $plugin_config, $subnetid, $subnet, $ip) = @_;
+
+    die "please implement inside plugin";
 }
 
 sub on_update_hook {
diff --git a/PVE/Network/SDN/Dns/PowerdnsPlugin.pm b/PVE/Network/SDN/Dns/PowerdnsPlugin.pm
index 4c00a26..d93fb06 100644
--- a/PVE/Network/SDN/Dns/PowerdnsPlugin.pm
+++ b/PVE/Network/SDN/Dns/PowerdnsPlugin.pm
@@ -52,6 +52,19 @@ sub add_a_record {
     my $type = Net::IP::ip_is_ipv6($ip) ? "AAAA" : "A";
     my $fqdn = $hostname.".".$zone.".";
 
+    my $zonecontent = get_zone_content($plugin_config, $zone);
+    my $existing_rrset = get_zone_rrset($zonecontent, $fqdn);
+
+    my $final_records = [];
+    my $foundrecord = undef;
+    foreach my $record (@{$existing_rrset->{records}}) {
+	if($record->{content} eq $ip) {
+	    $foundrecord = 1;
+	    next;
+	}
+	push @$final_records, $record;
+    }
+    return if $foundrecord;
 
     my $record = { content => $ip, 
                    disabled => JSON::false, 
@@ -59,11 +72,13 @@ sub add_a_record {
                    type => $type, 
                    priority => 0 };
 
+    push @$final_records, $record;
+
     my $rrset = { name => $fqdn, 
 		  type => $type, 
                    ttl =>  $ttl, 
 		  changetype => "REPLACE",
-		  records => [ $record ] };
+		  records => $final_records  };
 
 
     my $params = { rrsets => [ $rrset ] };
@@ -123,10 +138,37 @@ sub del_a_record {
     my $fqdn = $hostname.".".$zone.".";
     my $type = Net::IP::ip_is_ipv6($ip) ? "AAAA" : "A";
 
-    my $rrset = { name => $fqdn, 
-		  type => $type, 
-		  changetype => "DELETE",
-		  records => [] };
+    my $zonecontent = get_zone_content($plugin_config, $zone);
+    my $existing_rrset = get_zone_rrset($zonecontent, $fqdn);
+
+    my $final_records = [];
+    my $foundrecord = undef;
+    foreach my $record (@{$existing_rrset->{records}}) {
+        if ($record->{content} eq $ip) {
+	    $foundrecord = 1;
+	    next;
+	}
+	push @$final_records, $record;
+    }
+    return if !$foundrecord;
+ 
+    my $rrset = {};
+   
+    if (scalar (@{$final_records}) > 0) {
+	#if we still have other records, we rewrite them without removed ip
+	$rrset = { name => $fqdn,
+		   type => $type,
+		   ttl =>  $existing_rrset->{ttl},
+		   changetype => "REPLACE",
+		   records => $final_records  };
+
+    } else {
+
+	$rrset = { name => $fqdn, 
+		   type => $type, 
+		   changetype => "DELETE",
+		    records => [] };
+    }
 
     my $params = { rrsets => [ $rrset ] };
 
@@ -176,7 +218,7 @@ sub verify_zone {
     my $headers = ['Content-Type' => 'application/json; charset=UTF-8', 'X-API-Key' => $key];
 
     eval {
-        PVE::Network::SDN::api_request("GET", "$url/zones/$zone", $headers);
+        PVE::Network::SDN::api_request("GET", "$url/zones/$zone?rrsets=false", $headers);
     };
 
     if ($@) {
@@ -249,6 +291,39 @@ sub on_update_hook {
     }
 }
 
+
+sub get_zone_content {
+    my ($plugin_config, $zone) = @_;
+
+    #verify that api is working              
+
+    my $url = $plugin_config->{url};
+    my $key = $plugin_config->{key};
+    my $headers = ['Content-Type' => 'application/json; charset=UTF-8', 'X-API-Key' => $key];
+
+    my $result = undef;
+    eval {
+        $result = PVE::Network::SDN::api_request("GET", "$url/zones/$zone", $headers);
+    };
+
+    if ($@) {
+        die "can't read zone $zone: $@";
+    }
+    return $result;
+}
+
+sub get_zone_rrset {
+    my ($zonecontent, $name) = @_;
+
+    my $rrsetresult = undef;
+    foreach my $rrset (@{$zonecontent->{rrsets}}) {
+	next if $rrset->{name} ne $name;
+        $rrsetresult = $rrset;
+	last; 
+    }
+    return $rrsetresult;
+}
+
 1;
 
 
diff --git a/PVE/Network/SDN/Subnets.pm b/PVE/Network/SDN/Subnets.pm
index 5446044..25261ac 100644
--- a/PVE/Network/SDN/Subnets.pm
+++ b/PVE/Network/SDN/Subnets.pm
@@ -257,7 +257,7 @@ sub add_ip {
 }
 
 sub update_ip {
-    my ($zone, $subnetid, $subnet, $ip, $hostname, $mac, $description) = @_;
+    my ($zone, $subnetid, $subnet, $ip, $hostname, $oldhostname, $mac, $description) = @_;
 
     return if !$subnet || !$ip; 
 
@@ -287,10 +287,15 @@ sub update_ip {
 	die $@ if $@;
     }
 
+    return if $hostname eq $oldhostname;
+
     eval {
 	#add dns
+	
+	&$del_dns_record($dnszone, $dns, $oldhostname, $ip);
 	&$add_dns_record($dnszone, $dns, $hostname, $ip);
 	#add reverse dns
+	&$del_dns_ptr_record($reversednszone, $reversedns, $ip);
 	&$add_dns_ptr_record($reversednszone, $dnszone, $reversedns, $hostname, $ip);
     };
 }
diff --git a/PVE/Network/SDN/Vnets.pm b/PVE/Network/SDN/Vnets.pm
index 7421adf..ff39eef 100644
--- a/PVE/Network/SDN/Vnets.pm
+++ b/PVE/Network/SDN/Vnets.pm
@@ -134,10 +134,10 @@ sub add_cidr {
 }
 
 sub update_cidr {
-    my ($vnetid, $cidr, $hostname, $mac, $description) = @_;
+    my ($vnetid, $cidr, $hostname, $oldhostname, $mac, $description) = @_;
 
     my ($zone, $subnetid, $subnet, $ip) = PVE::Network::SDN::Vnets::get_subnet_from_vnet_cidr($vnetid, $cidr);
-    PVE::Network::SDN::Subnets::update_ip($zone, $subnetid, $subnet, $ip, $hostname, $mac, $description);
+    PVE::Network::SDN::Subnets::update_ip($zone, $subnetid, $subnet, $ip, $hostname, $oldhostname, $mac, $description);
 }
 
 sub del_cidr {
-- 
2.20.1




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