centos和kerberized工作良好，但只适用于nfs3。

Question

我想装入一个nfs4内核化的共享。我在centos7上，kerberos服务器是Freeipa，客户端是centos7。问题是我的配置适用于nfs3，而不是nfs4。首先我把我的配置

/etc/出口

/export         10.2.0.0/24(ro,no_subtree_check,fsid=0,)
/export/public      10.2.0.0/24(ro,no_subtree_check,async,root_squash,nohide,sec=sys)
/export/private     10.2.0.0/24(ro,no_subtree_check,async,root_squash,nohide,sec=krb5p)

/etc/nfsmount.conf

   [ NFSMount_Global_Options ]
    Defaultvers=4
    Defaultproto=tcp
    mountport=4001
    Port=2049

/etc/krb5.conf

#File modified by ipa-client-install

includedir /etc/krb5.conf.d/
includedir /var/lib/sss/pubconf/krb5.include.d/

[libdefaults]
  default_realm = MYREALM.FAKE
  dns_lookup_realm = true
  dns_lookup_kdc = true
  rdns = false
  dns_canonicalize_hostname = false
  ticket_lifetime = 24h
  forwardable = true
  udp_preference_limit = 0
  default_ccache_name = KEYRING:persistent:%{uid}


[realms]
  MYREALM.FAKE = {
    pkinit_anchors = FILE:/var/lib/ipa-client/pki/kdc-ca-bundle.pem
    pkinit_pool = FILE:/var/lib/ipa-client/pki/ca-bundle.pem

  }


[domain_realm]
  .myrealm.fake = MYREALM.FAKE
  myrealm.fake = MYREALM.FAKE
  centos1.myrealm.fake = MYREALM.FAKE

我拿到钥匙了

echo mypassword|kinit myuser

klist报告是否正常

现在，尝试在没有kerberos+nfs4的情况下挂载"public“

mount -t nfs  centos1:/public /mnt/ -vvv
mount.nfs: timeout set for Sat Mar  2 14:23:05 2019
mount.nfs: trying text-based options 'mountport=4001,port=2049,vers=4.1,addr=10.2.0.77,clientaddr=10.2.0.77'

而且还好

现在没有kerberos+nfs3的“公众”

mount -t nfs  centos1:/export/public /mnt/ -vvv
mount.nfs: timeout set for Sat Mar  2 14:26:41 2019
mount.nfs: trying text-based options 'vers=4.1,addr=10.2.0.77,clientaddr=10.2.0.77'
mount.nfs: mount(2): No such file or directory
mount.nfs: trying text-based options 'addr=10.2.0.77'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 10.2.0.77 prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=17
mount.nfs: trying 10.2.0.77 prog 100005 vers 3 prot UDP port 20048

而且还好

现在kerberos+nfs3的“私有”

mount -t nfs  centos1:/export/private /mnt/ -vvv
mount.nfs: timeout set for Sat Mar  2 14:28:05 2019
mount.nfs: trying text-based options 'vers=4.1,addr=10.2.0.77,clientaddr=10.2.0.77'
mount.nfs: mount(2): No such file or directory
mount.nfs: trying text-based options 'addr=10.2.0.77'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 10.2.0.77 prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=17
mount.nfs: trying 10.2.0.77 prog 100005 vers 3 prot UDP port 20048

也没问题。

问题是如果我尝试使用nfs4

mount -t nfs4  centos1:/private /mnt/ -vvv
mount.nfs4: timeout set for Sat Mar  2 14:29:54 2019
mount.nfs4: trying text-based options 'vers=4.1,addr=10.2.0.77,clientaddr=10.2.0.77'
mount.nfs4: mount(2): Operation not permitted
mount.nfs4: Operation not permitted

我也尝试过从其他客户端，同样的错误ipa服务器报告。

Mar 02 14:29:12 freeipa.realm.fake krb5kdc[611](info): AS_REQ (8 etypes {18 17 20 19 16 23 25 26}) 10.2.0.77: NEEDED_PREAUTH: admin@REALM.FAKE for krbtgt/REALM.FAKE@REALM.FAKE, Additional pre-authentication required
Mar 02 14:29:12 freeipa.realm.fake krb5kdc[611](info): closing down fd 11
Mar 02 14:29:12 freeipa.realm.fake krb5kdc[611](info): AS_REQ (8 etypes {18 17 20 19 16 23 25 26}) 10.2.0.77: ISSUE: authtime 1551533352, etypes {rep=18 tkt=18 ses=18}, admin@REALM.FAKE for krbtgt/REALM.FAKE@REALM.FAKE
Mar 02 14:29:12 freeipa.realm.fake krb5kdc[611](info): closing down fd 11

为什么nfs角化只适用于nfs3？我试过让firewalld和selinux残疾:同样的事情。

Answer 1

找到了解决方案，我编辑了/etc/导出如下

/export             10.2.0.0/24(ro,no_subtree_check,fsid=0,sec=krb5p:sys)
/export/private         10.2.0.0/24(ro,no_subtree_check,async,root_squash,nohide,sec=krb5p)
/export/public      10.2.0.0/24(ro,no_subtree_check,async,root_squash,nohide,sec=sys)

现在效果很好。

mount -vvv -t nfs4 -o sec=krb5p  centos1.myrealm.fake:/private /mnt
mount.nfs4: timeout set for Sun Mar  3 09:59:06 2019
mount.nfs4: trying text-based options 'sec=krb5p,vers=4.1,addr=10.2.0.77,clientaddr=10.2.0.77'
umount /mnt
mount -vvv -t nfs4 -o sec=sys  centos1.myrealm.fake:/public /mnt
mount.nfs4: timeout set for Sun Mar  3 09:59:19 2019
mount.nfs4: trying text-based options 'sec=sys,vers=4.1,addr=10.2.0.77,clientaddr=10.2.0.77'