IPA installation with --no-host-dns fails

--no-host-dns option should allow installing IPA server on a host
without a DNS resolvable name.

Update parse_ip_address and verify_ip_address functions has been
changed not to return None and print error messages in case of
an error, but rather let the Exception be handled by the calling
routine.

https://fedorahosted.org/freeipa/ticket/1246

install/tools/ipa-dns-install

@@ -108,7 +108,14 @@ def main():
     else:
         hostaddr = resolve_host(api.env.host)
         ip_address = hostaddr and ipautil.CheckedIPAddress(hostaddr)
-    if not ip_address or not verify_ip_address(ip_address):
+
+    try:
+        verify_ip_address(ip_address)
+    except Exception, e:
+        print "Error: Invalid IP Address %s: %s" % (ip_address, e)
+        ip_address = None
+
+    if not ip_address:
         if options.unattended:
             sys.exit("Unable to resolve IP address for host name")
         else:

install/tools/ipa-replica-prepare

@@ -78,11 +78,6 @@ def parse_options():
     if cnt > 0 and cnt < num:
         parser.error("All PKCS#12 options are required if any are used.")
 
-    if options.ip_address:
-        if not installutils.verify_ip_address(options.ip_address, match_local=False):
-            parser.error("Bad IP address")
-            sys.exit(1)
-
     if len(args) != 1:
         parser.error("must provide the fully-qualified name of the replica")
 

install/tools/ipa-server-install

@@ -598,14 +598,20 @@ def main():
     if hostaddr is not None:
         ip = CheckedIPAddress(hostaddr)
     else:
+        if not options.ip_address:
+            print "Unable to resolve IP address for host name"
         ip = options.ip_address
     if ip is None and options.unattended:
         sys.exit("Unable to resolve IP address for host name")
 
-    if not verify_ip_address(ip):
-        ip = None
-        if options.unattended:
-            sys.exit(1)
+    if ip:
+        try:
+            verify_ip_address(ip)
+        except Exception, e:
+            print "Error: Invalid IP Address %s: %s" % (ip, e)
+            if options.unattended:
+                sys.exit(1)
+            ip = None
 
     if options.ip_address:
         if options.ip_address != ip and not options.setup_dns:
@@ -615,8 +621,11 @@ def main():
             return 1
 
         ip = options.ip_address
-        if not verify_ip_address(ip):
-            return 1
+        try:
+            verify_ip_address(ip)
+        except Exception, e:
+            print "Error: Invalid IP Address %s: %s" % (ip, e)
+            sys.exit(1)
 
     if ip is None:
         ip = read_ip_address(host_name, fstore)

ipaserver/install/installutils.py

@@ -108,6 +108,10 @@ def verify_fqdn(host_name,no_host_dns=False):
     if host_name != host_name.lower():
         raise RuntimeError("Invalid hostname '%s', must be lower-case." % host_name)
 
+    if no_host_dns:
+        print "Warning: skipping DNS resolution of host", host_name
+        return
+
     try:
         hostaddr = socket.getaddrinfo(host_name, None)
     except:
@@ -127,10 +131,6 @@ def verify_fqdn(host_name,no_host_dns=False):
         if revname != host_name:
             raise RuntimeError("The host name %s does not match the reverse lookup %s" % (host_name, revname))
 
-    if no_host_dns:
-        print "Warning: skipping DNS resolution of host", host_name
-        return
-
     # Verify this is NOT a CNAME
     rs = dnsclient.query(host_name+".", dnsclient.DNS_C_IN, dnsclient.DNS_T_CNAME)
     if len(rs) != 0:
@@ -152,17 +152,13 @@ def verify_fqdn(host_name,no_host_dns=False):
         print "Warning: Hostname (%s) not found in DNS" % host_name
 
 def parse_ip_address(addr, match_local=True, parse_netmask=True):
-    try:
-        ip = ipautil.CheckedIPAddress(addr, match_local=match_local, parse_netmask=parse_netmask)
-        if match_local and not ip.is_local():
-            print "Warning: No network interface matches IP address %s" % addr
-        return ip
-    except Exception as e:
-        print "Error: Invalid IP Address %s: %s" % (addr, e)
-        return None
+    ip = ipautil.CheckedIPAddress(addr, match_local=match_local, parse_netmask=parse_netmask)
+    if match_local and not ip.is_local():
+        print "Warning: No network interface matches IP address %s" % addr
+    return ip
 
 def verify_ip_address(addr, match_local=True, parse_netmask=True):
-    return parse_ip_address(addr, match_local, parse_netmask) is not None
+    ip = parse_ip_address(addr, match_local, parse_netmask)
 
 def record_in_hosts(ip, host_name, file="/etc/hosts"):
     hosts = open(file, 'r').readlines()
@@ -195,9 +191,12 @@ def add_record_to_hosts(ip, host_name, file="/etc/hosts"):
 def read_ip_address(host_name, fstore):
     while True:
         ip = ipautil.user_input("Please provide the IP address to be used for this host name", allow_empty = False)
-        ip_parsed = parse_ip_address(ip)
-
-        if ip_parsed is not None:
+        try:
+            ip_parsed = parse_ip_address(ip)
+        except Exception, e:
+            print "Error: Invalid IP Address %s: %s" % (ip, e)
+            continue
+        else:
             break
 
     ip = str(ip_parsed)
@@ -217,8 +216,10 @@ def read_dns_forwarders():
                                     allow_empty=True)
             if not ip:
                 break
-            ip_parsed = parse_ip_address(ip, match_local=False, parse_netmask=False)
-            if ip_parsed is None:
+            try:
+                ip_parsed = parse_ip_address(ip, match_local=False, parse_netmask=False)
+            except Exception, e:
+                print "Error: Invalid IP Address %s: %s" % (ip, e)
                 print "DNS forwarder %s not added" % ip
                 continue