私のアプリケーションは、CIFS と Kerberos を使用して Isilon 共有を安全にマウントする必要があります。私のmount試みは次を返します: Required key not available:
mount -t cifs //fileserver.example.com/client123/files /mnt/client123/files -o username=acoder,password=XXXXXX,sec=krb5
応答：
mount error(126): Required key not available
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)
からの対応するエントリは次のとおりです。/var/log/messages
Sep 16 16:33:49 clientbox kernel: CIFS VFS: Send error in SessSetup = -126
Sep 16 16:33:49 clientbox kernel: CIFS VFS: cifs_mount failed w/return code = -126
背景と構成
以下を使用してキータブを追加しました。
/usr/bin/ktutil
addent -password -p acoder@EXAMPLE.COM -k 1 -e rc4-hmac
addent -password -p acoder@EXAMPLE.COM -k 1 -e aes256-cts
wkt /etc/krb5.keytab
で確認klist -kte:
[acoder@clientbox]# klist -kte
Keytab name: FILE:/etc/krb5.keytab
KVNO Timestamp Principal
---- ----------------- --------------------------------------------------------
1 09/16/15 16:24:32 acoder@EXAMPLE.COM (arcfour-hmac)
1 09/16/15 16:25:46 acoder@EXAMPLE.COM (aes256-cts-hmac-sha1-96)
ここにありrequest-key.confます：
#OP TYPE DESCRIPTION CALLOUT INFO PROGRAM ARG1 ARG2 ARG3 ...
#====== ======= =============== =============== ===============================
create user debug:* negate /bin/keyctl negate %k 30 %S
create user debug:loop:* * |/bin/cat
create user debug:* * /usr/share/keyutils/request-key-debug.sh %k %d %c %S
negate * * * /bin/keyctl negate %k 30 %S
create cifs.spnego * * /usr/sbin/cifs.upcall %k
create dns_resolver * * /usr/sbin/cifs.upcall %k
チケットキャッシュ:
# klist | grep "Ticket cache:"
Ticket cache: FILE:/tmp/krb5cc_0
「必要なキーがありません」というエラーの原因は何ですか?
編集: CIFS でデバッグを有効にし、共有を再度マウントしようとしました。その出力は次のとおりです。
fs/cifs/cifsfs.c: Devname: //fileserver.example.com/client123/files flags: 0
fs/cifs/connect.c: prefix path /files
fs/cifs/connect.c: Username: acoder
fs/cifs/connect.c: file mode: 0x1ed dir mode: 0x1ed
fs/cifs/connect.c: CIFS VFS: in cifs_mount as Xid: 8 with uid: 0
fs/cifs/connect.c: UNC: \\fileserver.example.com/client123/files ip: 1.2.3.4
fs/cifs/connect.c: Socket created
fs/cifs/connect.c: sndbuf 19800 rcvbuf 87380 rcvtimeo 0x1b58
fs/cifs/connect.c: CIFS VFS: in cifs_get_smb_ses as Xid: 9 with uid: 0
fs/cifs/connect.c: Demultiplex PID: 22937
fs/cifs/connect.c: Existing smb sess not found
fs/cifs/cifssmb.c: secFlags 0x9
fs/cifs/cifssmb.c: Kerberos only mechanism, enable extended security
fs/cifs/transport.c: For smb_command 114
fs/cifs/transport.c: Sending smb: smb_len=78
fs/cifs/connect.c: RFC1002 header 0xbc
fs/cifs/transport.c: cifs_sync_mid_result: cmd=114 mid=1 state=4
fs/cifs/cifssmb.c: Dialect: 2
fs/cifs/asn1.c: OID len = 7 oid = 0x1 0x2 0x348 0x1bb92
fs/cifs/asn1.c: OID len = 6 oid = 0x1 0x3 0x5 0x1
fs/cifs/asn1.c: OID len = 7 oid = 0x1 0x2 0x348 0xbb92
fs/cifs/asn1.c: OID len = 10 oid = 0x1 0x3 0x6 0x1
fs/cifs/asn1.c: Need to call asn1_octets_decode() function for not_defined_in_RFC4178@please_ignore
fs/cifs/cifssmb.c: negprot rc 0
fs/cifs/connect.c: Security Mode: 0x3 Capabilities: 0x8000e2fc TimeAdjust: 0
fs/cifs/sess.c: sess setup type 4
fs/cifs/cifs_spnego.c: key description = ver=0x2;host=fileserver.example.com;ip4=1.2.3.4;sec=krb5;uid=0x0;creduid=0x0;user=acoder;pid=0xXXXXX
fs/cifs/sess.c: ssetup freeing small buf ffff8804359b02701
CIFS VFS: Send error in SessSetup = -126
fs/cifs/connect.c: CIFS VFS: leaving cifs_get_smb_ses (xid = 9) rc = -126
fs/cifs/connect.c: CIFS VFS: leaving cifs_mount (xid = 8) rc = -126
CIFS VFS: cifs_mount failed w/return code = -126