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centos6 – IPA动态DNS仅更新AAAA记录.我的A记录在哪里?

运维开发网 https://www.qedev.com 2020-05-06 16:52 出处:网络 作者:运维开发网整理
我正在建立一个FreeIPA域名.在我的实验室中有三个虚拟机:域控制器ipadc1,两个客户端puppet和wordpress(创意,是的,我知道).所有三个虚拟机都运行新安装的CentOS 6.4(FreeIPA 3.0.0).
我正在建立一个FreeIPA域名.在我的实验室中有三个虚拟机:域控制器ipadc1,两个客户端puppet和wordpress(创意,是的,我知道).所有三个虚拟机都运行新安装的CentOS 6.4(FreeIPA 3.0.0).

我已经安装了IPA服务器,创建了一个域名,我们在这里称之为example.us,启用了DNS服务和自动DNS更新.

我已成功将两个虚拟机加入域.但动态DNS更新只是将AAAA记录放入DNS.没有插入A记录.

我对dyanmic更新和BIND更新策略的DNS区域设置似乎也是正确的.

两个客户端虚拟机实际上都有IPv4地址; puppet有一个静态IPv4地址,wordpress从DHCP获取其IPv4地址.这似乎没有什么区别.

# ip a s dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:3c:d5:f5 brd ff:ff:ff:ff:ff:ff
    inet 172.25.50.227/24 brd 172.25.50.255 scope global eth0
    inet6 2001:db8:16:bf:5054:ff:fe3c:d5f5/64 scope global dynamic 
       valid_lft 86180sec preferred_lft 14180sec
    inet6 fe80::5054:ff:fe3c:d5f5/64 scope link 
       valid_lft forever preferred_lft forever

问题实际上似乎是sssd,我学到的实际上是负责推动动态DNS更新.我使用debug_level = 9进行了调试,并在日志中找到了它.这似乎表明sssd甚至没有尝试发送A记录,尽管它并没有真正给我任何指示.

(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [ipa_dyndns_update_send] (0x4000): Performing update
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [ok_for_dns] (0x0200): Multicast IPv4 address 172.25.50.227
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [ok_for_dns] (0x0200): Link local IPv6 address fe80::5054:ff:fe3c:d5f5
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [ipa_dyndns_gss_tsig_update_step] (0x1000): Checking if the update is needed
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_get_family_order] (0x1000): Lookup order: ipv6_first
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_is_address] (0x4000): [wordpress.example.us] does not look like an IP address
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_step] (0x2000): Querying DNS
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_dns_query] (0x0100): Trying to resolve AAAA record of 'wordpress.example.us' in DNS
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [schedule_request_timeout] (0x2000): Scheduling a timeout of 5 seconds
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [schedule_timeout_watcher] (0x2000): Scheduling DNS timeout watcher
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [unschedule_timeout_watcher] (0x4000): Unscheduling DNS timeout watcher
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [request_watch_destructor] (0x0400): Deleting request watch
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_step] (0x2000): Querying DNS
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_dns_query] (0x0100): Trying to resolve A record of 'wordpress.example.us' in DNS
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [schedule_request_timeout] (0x2000): Scheduling a timeout of 5 seconds
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [schedule_timeout_watcher] (0x2000): Scheduling DNS timeout watcher
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [unschedule_timeout_watcher] (0x4000): Unscheduling DNS timeout watcher
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [request_watch_destructor] (0x0400): Deleting request watch
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_next] (0x0200): No more address families to retry
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_next] (0x0100): No more hosts databases to retry
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_is_address] (0x4000): [wordpress.example.us] does not look like an IP address
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_step] (0x2000): Querying DNS
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_dns_query] (0x0100): Trying to resolve A record of 'wordpress.example.us' in DNS
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [schedule_request_timeout] (0x2000): Scheduling a timeout of 5 seconds
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [schedule_timeout_watcher] (0x2000): Scheduling DNS timeout watcher
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [unschedule_timeout_watcher] (0x4000): Unscheduling DNS timeout watcher
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [request_watch_destructor] (0x0400): Deleting request watch
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_next] (0x0200): No more address families to retry
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [resolv_gethostbyname_next] (0x0100): No more hosts databases to retry
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [ipa_dyndns_gss_tsig_update_check] (0x1000): Address on localhost only: 2001:db8:16:bf:5054:ff:fe3c:d5f5
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [ipa_dyndns_gss_tsig_update_check] (0x0400): Detected IP addresses change, will perform an update
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [create_nsupdate_message] (0x0200): Creating update message for realm [EXAMPLE.US] and zone [example.us].
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [create_nsupdate_message] (0x0400):  -- Begin nsupdate message --
realm EXAMPLE.US
zone example.us.
update delete wordpress.example.us. in A
send
update delete wordpress.example.us. in AAAA
send
update add wordpress.example.us. 86400 in AAAA 2001:db8:16:bf:5054:ff:fe3c:d5f5
send
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [create_nsupdate_message] (0x0400):  -- End nsupdate message --
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [child_handler_setup] (0x2000): Setting up signal handler up for pid [2144]
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [child_handler_setup] (0x2000): Signal handler set up for pid [2144]
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [write_pipe_handler] (0x0400): All data has been sent!
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [ipa_dyndns_stdin_done] (0x4000): Sending nsupdate data complete
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [child_sig_handler] (0x1000): Waiting for child [2144].
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [child_sig_handler] (0x0100): child [2144] finished successfully.
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [sss_child_handler] (0x2000): waitpid failed [10]: No child processes
(Mon Jul 22 21:50:01 2013) [sssd[be[example.us]]] [ipa_dyndns_update_done] (0x0020): DNS update finished

我的sssd.conf是:

[domain/example.us]

cache_credentials = True
krb5_store_password_if_offline = True
ipa_domain = example.us
id_provider = ipa
auth_provider = ipa
access_provider = ipa
ipa_hostname = wordpress.example.us
chpass_provider = ipa
ipa_dyndns_update = True
ipa_server = _srv_, ipadc1.example.us
ldap_tls_cacert = /etc/ipa/ca.crt
[sssd]
services = nss, pam, ssh
config_file_version = 2

domains = example.us
[nss]

[pam]

[sudo]

[autofs]

[ssh]

[pac]

ipa dnszone-show example.us –all的结果是:

dn: idnsname=example.us,cn=dns,dc=example,dc=us
  Zone name: example.us
  Authoritative nameserver: ipadc1.example.us.
  Administrator e-mail address: hostmaster.example.us.
  SOA serial: 1374982142
  SOA refresh: 3600
  SOA retry: 900
  SOA expire: 1209600
  SOA minimum: 3600
  BIND update policy: grant EXAMPLE.US krb5-self * A; grant EXAMPLE.US krb5-self
                      * AAAA; grant EXAMPLE.US krb5-self * SSHFP;
  Active zone: TRUE
  Dynamic update: TRUE
  Allow query: any;
  Allow transfer: none;
  mxrecord: 0 mail.example.us
  nsrecord: ipadc1.example.us.
  objectclass: top, idnsrecord, idnszone
  txtrecord: v=spf1 a mx -all

虽然这对我来说真的是一个小问题,因为我可以在没有IPv4 DNS更新的情况下上线(很好地成为100%双栈),不知道这里发生了什么仍然很烦人.也许我错过了可以揭示情况的日志?

(哦,是的,我把它关了再打开.)

添加后

ipa_dyndns_iface = eth0

在那个pastebin中,我看到sssd将你的ip识别为多播:

“(Tue Jul 9 10:00:01 2013)[sssd [be [example.us]]] [ok_for_dns](0x0200):Multicast IPv4 address 172.25.50.227”

在雅各布编写的代码中,他将测试looback地址,多播地址e.t.c.不向dns报告你会发现你的错误:

if (IN_MULTICAST(ntohl(addr->s_addr))) {
        DEBUG(SSSDBG_FUNC_DATA, ("Multicast IPv4 address %s\n", straddr));
        return false;
    } else if (inet_netof(*addr) == IN_LOOPBACKNET) {
        DEBUG(SSSDBG_FUNC_DATA, ("Loopback IPv4 address %s\n", straddr));
        return false;
    } else if ((addr->s_addr & 0xffff0000) == 0xa9fe0000) {
        /* 169.254.0.0/16 */
        DEBUG(SSSDBG_FUNC_DATA, ("Link-local IPv4 address %s\n", straddr));
        return false;
    } else if (addr->s_addr == htonl(INADDR_BROADCAST)) {
        DEBUG(SSSDBG_FUNC_DATA, ("Broadcast IPv4 address %s\n", straddr));
        return false;
    }
} else {
    DEBUG(SSSDBG_CRIT_FAILURE, ("Unknown address family\n"));
    return false;
}

return true;

现在问题是为什么它被认为是“多播地址”我不知道.作为IN中的IN_MULTICAST,您可以看到:

"IN_MULTICAST(a)" - tests whether a is a multicast address. and it is in "inet.h/in.h":
   #define  IN_CLASSD(i)        (((long)(i) & 0xf0000000) == 0xe0000000)
   #define  IN_MULTICAST(i)     IN_CLASSD(i)

那么IP地址如何评估多播,我会尝试对它进行分析并查看.你也可以问Jacob Hrozek,他写了那段sssd代码.他通常总是在freenode的#sssd上可用,如果你分享你最终的结果,那将是很棒的.

希望它有所帮助.

编辑

是的,您的1.9.2版本中存在一个错误.你有:

if (IN_MULTICAST(addr->s_addr))) {

它应该是:

if (IN_MULTICAST(ntohl(addr->s_addr))) {
0

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