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network: Allow adding DNS entries sharing hostname for multiple addreses

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Having multiple addresses having same hostname is a common config either
to have IPv4 and IPv6 address for the same hostname or even for DNS
round robin. The validation in the network update code didn't allow
adding such entries despite the fact that it is possible to define a
network with them.

Don't check hostname duplicity when adding a DNS entry.

The update of the test case adds another entry for the 'pudding'
hostname which is added in one of the networkxml2xmlupdate test cases.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Peter Krempa 2021-07-14 12:58:12 +02:00
parent 21ad1dcd32
commit 16cb11a66a
5 changed files with 21 additions and 4 deletions
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5
src/conf/network_conf.c
View File

@ -3404,12 +3404,17 @@ virNetworkDefUpdateDNSHost(virNetworkDef *def,
if (virSocketAddrEqual(&host.ip, &dns->hosts[i].ip))
foundThisTime = true;
/* when adding we want to only check duplicates of address since having
* multiple addresses with the same hostname is a legitimate configuration */
if (!isAdd) {
for (j = 0; j < host.nnames && !foundThisTime; j++) {
for (k = 0; k < dns->hosts[i].nnames && !foundThisTime; k++) {
if (STREQ(host.names[j], dns->hosts[i].names[k]))
foundThisTime = true;
}
}
}
if (foundThisTime) {
foundCt++;
foundIdx = i;

3
tests/networkxml2xmlin/nat-network-dns-hosts.xml
View File

@ -4,6 +4,9 @@
<forward dev='eth0' mode='nat'/>
<bridge name='virbr0' stp='on' delay='0'/>
<dns forwardPlainNames='no'>
<host ip='192.168.122.122'>
<hostname>pudding</hostname>
</host>
<host ip='192.168.122.1'>
<hostname>host</hostname>
<hostname>gateway</hostname>

3
tests/networkxml2xmlout/nat-network-dns-hosts.xml
View File

@ -6,6 +6,9 @@
</forward>
<bridge name='virbr0' stp='on' delay='0'/>
<dns forwardPlainNames='no'>
<host ip='192.168.122.122'>
<hostname>pudding</hostname>
</host>
<host ip='192.168.122.1'>
<hostname>host</hostname>
<hostname>gateway</hostname>

3
tests/networkxml2xmlupdateout/nat-network-dns-more-hosts.xml
View File

@ -9,6 +9,9 @@
<host ip='f0:d::f0:d'>
<hostname>pudding</hostname>
</host>
<host ip='192.168.122.122'>
<hostname>pudding</hostname>
</host>
<host ip='192.168.122.1'>
<hostname>host</hostname>
<hostname>gateway</hostname>

3
tests/networkxml2xmlupdateout/nat-network-no-hosts.xml
View File

@ -6,6 +6,9 @@
</forward>
<bridge name='virbr0' stp='on' delay='0'/>
<dns forwardPlainNames='no'>
<host ip='192.168.122.122'>
<hostname>pudding</hostname>
</host>
<host ip='192.168.122.2'>
<hostname>shared</hostname>
<hostname>names</hostname>