** Description changed:
- Having an interface file such as /run/net-eno2.conf with the following
- content:
+ [Impact]
+
+ * open-iscsi is adding "domainsearch", a non-existent configuration
+ option, instead of "search" in /etc/resolv.conf. As a result, the search
+ list is ignored in the clients.
+
+ [Test case]
+
+ * Install an ubuntu machine that uses iscsi as root.
+ * Prepare the dhcp server to provide the search list to its clients. For
instance, in dnsmasq:
+
+ dhcp-option=option:domain-search,canonical.com
+
+ * Boot the machine and check the content of /etc/resolv.conf
+ - if domainsearch is present, the search list will be ignored:
+
+ root@iscsi-xenial:/home/ubuntu# ping -c1 golem
+ ping: unknown host golem
+
+ root@iscsi-xenial:/home/ubuntu# strace ping -c1 golem 2>&1 | grep golem
+ execve("/bin/ping", ["ping", "-c1", "golem"], [/* 19 vars */]) = 0
+ sendto(4, "_(\1\0\0\1\0\0\0\0\0\0\5golem\0\0\1\0\1", 23, MSG_NOSIGNAL, NULL,
0) = 23
+ recvfrom(4, "_(\201\203\0\1\0\0\0\0\0\0\5golem\0\0\1\0\1", 1024, 0,
{sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.122.1")},
[16]) = 23
+ write(2, "ping: unknown host golem\n", 25ping: unknown host golem
+
+ - if search is present, the search list will be used:
+
+ root@iscsi-xenial:/home/ubuntu# ping -c1 golem
+ PING golem.canonical.com (91.189.89.199) 56(84) bytes of data.
+ 64 bytes from golem.canonical.com (91.189.89.199): icmp_seq=1 ttl=57
time=63.7 ms
+
+ --- golem.canonical.com ping statistics ---
+ 1 packets transmitted, 1 received, 0% packet loss, time 0ms
+ rtt min/avg/max/mdev = 63.735/63.735/63.735/0.000 ms
+
+ root@iscsi-xenial:/home/ubuntu# strace ping -c1 golem 2>&1 | grep golem
+ execve("/bin/ping", ["ping", "-c1", "golem"], [/* 19 vars */]) = 0
+ sendto(4, "\1\\\1\0\0\1\0\0\0\0\0\0\5golem\tcanonical\3com"..., 37,
MSG_NOSIGNAL, NULL, 0) = 37
+ recvfrom(4, "\1\\\201\200\0\1\0\1\0\0\0\0\5golem\tcanonical\3com"..., 1024,
0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("192.168.122.1")}, [16]) = 53
+ write(1, "PING golem.canonical.com (91.189"..., 145PING golem.canonical.com
(91.189.89.199) 56(84) bytes of data.
+ 64 bytes from golem.canonical.com (91.189.89.199): icmp_seq=1 ttl=57
time=63.5 ms
+ write(1, "--- golem.canonical.com ping sta"..., 157--- golem.canonical.com
ping statistics ---
+
+ [Regression potential]
+
+ * None
+
+ [Other info]
+
+ * resolv.conf man page: http://man7.org/linux/man-
+ pages/man5/resolv.conf.5.html
+
+ [Original description]
+
+
+ Having an interface file such as /run/net-eno2.conf with the following
content:
DEVICE='eno2'
PROTO='dhcp'
IPV4ADDR='10.10.10.10'
IPV4BROADCAST='10.10.10.255'
IPV4NETMASK='255.255.255.0'
IPV4GATEWAY='10.10.10.1'
IPV4DNS0='169.254.169.254'
IPV4DNS1='0.0.0.0'
HOSTNAME=''
DNSDOMAIN='test.com'
NISDOMAIN=''
ROOTSERVER='169.254.169.254'
ROOTPATH=''
filename='/ipxe.efi'
UPTIME='45'
DHCPLEASETIME='86400'
DOMAINSEARCH='test.com'
net-interface-handler translates it to:
nameserver 169.254.169.254
domainsearch test.com
instead of:
nameserver 169.254.169.254
search test.com
The problem is that domainsearch is not a valid configuration option for
/etc/resolv.conf and is ignored.
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https://bugs.launchpad.net/bugs/1791108
Title:
open-iscsi uses domainsearch instead of search for /etc/resolv.conf
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