Autofs 1(① autofs, ② 실습1)

* 강사님 정리 노트 :

1월26일_12평일리2.txt

* autofs

# man nfs

 

 

0> 개념

- 자동 마운트의 작동을 제어하는 서비스(daemon)

- 자동으로 사용시 파일 시스템을 마운트하고 일정시간이 지나 사용하지 않으면 저절로 언마운트 함

 

autofs 패키지 설치 유무를 확인!

패키지명은 autofs로 시작함

 

1> /etc/autofs.conf

(참고로 CentOS 6.5 이후부터는 /etc/autofs.conf 파일로 바뀜.

그전에는 /etc/sysconfig/autofs 파일이었음)

 

15줄 : 일정시간동안 아무런 작업을 하지 않으면 저절로 언마운트되는 시간이 지정

45줄: 자동으로 생성되는 디렉터리 출력 여부 (기본값 no를 yes로 바꿔주어야함=> ls, cd 가능하게하려면..,)

=> etc/auto.master

 

2> /etc/auto.master

- 자동으로 생성될 디렉터리와 관련된 설정파일이 저장되어 있는 파일

=> /misc 여기 하위가 client가 autofs mount 할 경로?

=> autofs를 쓸 때 자동마운트 할 경로 (mount pt.?)

 

7줄 : 자동으로 생성되는 디렉터리 경로와 해당 관련 설정파일이 지정 되어있음

=> /etc/auto.misc

 

3> /etc/auto.misc

- client의 마운트 포인트명과 접속할 Server-IP와 Server의 공유할 디렉터리를 설정하는 파일

 

설정방법

16 client의 mount-point     -option     Server-IP:Server의 share_dir

=> 16 test_nfs_c1     -rw,intr   192.168.46.90:/test_nfs_s1

option

ro → 읽기전용 파일 시스템

rw → 읽고쓰기 파일 시스템

soft → nfs server 요청에 실패하면 returns 설정에 횟수 만큼 재 요청을 시도함

hard → nfs server 요청에 실패하면 무한정 재시도(기본값)

intr(interrupt) → 정지 프로세스를 죽이기 위함

 

 

 

 

 

 

 

[server]

① 파티션 설정

② 포맷     /dev/sdb1

③ nfs 패키지 설치

④ /etc/exports 설정

⑤ nfs.service 재시작, exportfs -ra

⑥ mount

⑦  automount(재부팅 하면 날라가니까 해줌!) : /etc/exports 쓰기

[client]

① nfs mount (nfs service가 켜져 있어야..,)

 

=> client도 automount 하고 싶다!

① /etc/fstab이 있다?

② autofs system => 저절로 mount..,

    안 쓰면 또 unmount..,

 

[root@junga /]# rpm -qa | grep autofs
[root@junga /]#
[root@junga /]# yum install autofs*
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: ftp.nara.wide.ad.jp
 * extras: ftp.iij.ad.jp
 * updates: mirror.0x.sg
Resolving Dependencies
--> Running transaction check
---> Package autofs.x86_64 1:5.0.7-70.el7_4.1 will be installed
--> Processing Dependency: libhesiod.so.0()(64bit) for package: 1:autofs-5.0.7-70.el7_4.1.x86_64
--> Running transaction check
---> Package hesiod.x86_64 0:3.2.1-3.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

============================================================================================
 Package           Arch              Version                       Repository          Size
============================================================================================
Installing:
 autofs            x86_64            1:5.0.7-70.el7_4.1            updates            809 k
Installing for dependencies:
 hesiod            x86_64            3.2.1-3.el7                   base                30 k

Transaction Summary
============================================================================================
Install  1 Package (+1 Dependent package)

Total download size: 839 k
Installed size: 5.1 M
Is this ok [y/d/N]: y
Downloading packages:
(1/2): hesiod-3.2.1-3.el7.x86_64.rpm                                 |  30 kB  00:00:00    
(2/2): autofs-5.0.7-70.el7_4.1.x86_64.rpm                            | 809 kB  00:00:02    
--------------------------------------------------------------------------------------------
Total                                                       303 kB/s | 839 kB  00:00:02    
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : hesiod-3.2.1-3.el7.x86_64                                                1/2
  Installing : 1:autofs-5.0.7-70.el7_4.1.x86_64                                         2/2
  Verifying  : 1:autofs-5.0.7-70.el7_4.1.x86_64                                         1/2
  Verifying  : hesiod-3.2.1-3.el7.x86_64                                                2/2

Installed:
  autofs.x86_64 1:5.0.7-70.el7_4.1                                                         

Dependency Installed:
  hesiod.x86_64 0:3.2.1-3.el7                                                              

Complete!

[root@junga /]# vi /etc/autofs.conf
[root@junga /]#
[root@junga /]# ls -l /etc/autofs.conf
-rw-r--r-- 1 root root 14393  1월 26 13:18 /etc/autofs.conf
[root@junga /]#
[root@junga /]# ls -l /etc/auto.master
-rw-r--r-- 1 root root 795 12월  1 04:17 /etc/auto.master
[root@junga /]#
[root@junga /]# vi /etc/auto.master
[root@junga /]#
[root@junga /]# vi /etc/auto.misc

16 test_nfs_c1     -rw,intr   192.168.46.90:/test_nfs_s1

[root@junga /]#
[root@junga /]# tail -1 /etc/auto.misc
test_nfs_c1 -rw,intr   192.168.46.90:/test_nfs_s1
[root@junga /]#
[root@junga /]# systemctl is-active nfs.service
unknown
[root@junga /]#
[root@junga /]# systemctl is-active autofs.service
unknown

 

[root@junga /]# systemctl restart nfs.service

[root@junga /]#
[root@junga /]# systemctl restart autofs.service

[root@junga /]# systemctl -l status autofs.service
● autofs.service - Automounts filesystems on demand
   Loaded: loaded (/usr/lib/systemd/system/autofs.service; disabled; vendor preset: disabled)
   Active: active (running) since 금 2018-01-26 14:02:04 KST; 1min 25s ago
  Process: 4379 ExecStart=/usr/sbin/automount $OPTIONS --pid-file /run/autofs.pid (code=exited, status=0/SUCCESS)
 Main PID: 4381 (automount)
   CGroup: /system.slice/autofs.service
           └─4381 /usr/sbin/automount --pid-file /run/autofs.pid

 1월 26 14:01:54 junga.kgitbank automount[4381]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:01:54 junga.kgitbank automount[4381]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:01:56 junga.kgitbank automount[4381]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:01:58 junga.kgitbank automount[4381]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:02:00 junga.kgitbank automount[4381]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:02:02 junga.kgitbank automount[4381]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:02:04 junga.kgitbank automount[4381]: problem reading master map, maximum wait exceeded
 1월 26 14:02:04 junga.kgitbank automount[4381]: /usr/sbin/automount: warning: could not read at least one map source after waiting, continuing ...
 1월 26 14:02:04 junga.kgitbank automount[4381]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:02:04 junga.kgitbank systemd[1]: Started Automounts filesystems on demand.

[root@junga /]# ls -l /misc
합계 0
dr-xr-xr-x 2 root root 0  1월 26 14:02 cd
dr-xr-xr-x 2 root root 0  1월 26 14:02 test_nfs_c1        // autofs 재 시작 후 생성
[root@junga /]#
[root@junga /]#

// 확인

[client]

[root@junga /]# ls -l /misc/test_nfs_c1
합계 0
[root@junga /]#
[root@junga /]# touch /misc/test_nfs_c1/testfile2
[root@junga /]#
[root@junga /]# ls -l /misc/test_nfs_c1
합계 0
-rw-r--r-- 1 root root 0  1월 26 14:12 testfile2

[server]

[root@junga ~]# ls -l /test_nfs_s1
합계 0
[root@junga ~]# ls -l /test_nfs_s1
합계 0
-rw-r--r-- 1 root root 0  1월 26 14:12 testfile2

 

// reboot 후?

==============================

<실습 1>

autofs 실습

- client에서 어제 환경설정을 이어서..

HDD : 1GB, SCSI

Partition : 100, 200, 300(이걸 사용), 400

nfs server
/etc/exports -> 호스트 방식(우리가 연습했던 옵션 그대로)
auto mount

nfs client
autofs service를 사용
nfs client 마운트포인트에서 파일이나 디렉터리 생성 후 nfs server에서도 공유되는지 확인(반드시 재부팅 후 확인)

 

[server]

① /dev/sdb3 format, automount(/etc/fstab + mount) 

② autofs 설치

③ 설정파일 : /etc/autofs.conf (line. 45)

    autofs mount pt. : /etc/auto.master (line. 7) 확인

④ autofs 재시작 및 /misc 폴더 생성 확인

⑤ 확인 및 reboot (안되면 reset!)

 

 

 

 

// ①

[root@localhost ~]# df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/sda6                      13G  7.4G  5.6G  57% /
devtmpfs                      474M     0  474M   0% /dev
tmpfs                         488M     0  488M   0% /dev/shm
tmpfs                         488M  7.1M  481M   2% /run
tmpfs                         488M     0  488M   0% /sys/fs/cgroup
/dev/sdb1                      97M  5.2M   92M   6% /auto/sharedir
/dev/sda5                     197M   16M  181M   9% /home
/dev/sda1                     997M  194M  803M  20% /boot
/dev/sda3                     2.0G  453M  1.6G  23% /var
tmpfs                          98M  4.0K   98M   1% /run/user/42
tmpfs                          98M   24K   98M   1% /run/user/0
/dev/sr0                      8.1G  8.1G     0 100% /run/media/root/CentOS 7 x86_64
192.168.46.85:/auto/sharedir   97M  5.3M   92M   6% /test_nfs_c1
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# fdisk -l /dev/sdb

Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x80ac2390

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048      206847      102400   83  Linux
/dev/sdb2          206848      616447      204800   83  Linux
/dev/sdb3          616448     1230847      307200   83  Linux
/dev/sdb4         1230848     2097151      433152   83  Linux
[root@localhost ~]#
[root@localhost ~]# mkfs.xfs /dev/sdb3
mkfs.xfs: /dev/sdb3 appears to contain an existing filesystem (xfs).
mkfs.xfs: Use the -f option to force overwrite.
[root@localhost ~]#
[root@localhost ~]# blkid /dev/sdb3
/dev/sdb3: UUID="ddf9e8e5-e124-4cf6-bf0f-49777b22637d" TYPE="xfs"
[root@localhost ~]#
[root@localhost ~]# vi /etc/exports
[root@localhost ~]#
[root@localhost ~]# vi /etc/fstab
[root@localhost ~]#
[root@localhost ~]# df -h | tail -2
/dev/sr0                      8.1G  8.1G     0 100% /run/media/root/CentOS 7 x86_64
192.168.46.85:/auto/sharedir   97M  5.3M   92M   6% /test_nfs_c1
[root@localhost ~]#
[root@localhost ~]# df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/sda6                      13G  7.4G  5.6G  57% /
devtmpfs                      474M     0  474M   0% /dev
tmpfs                         488M     0  488M   0% /dev/shm
tmpfs                         488M  7.1M  481M   2% /run
tmpfs                         488M     0  488M   0% /sys/fs/cgroup
/dev/sdb1                      97M  5.2M   92M   6% /auto/sharedir
/dev/sda5                     197M   16M  181M   9% /home
/dev/sda1                     997M  194M  803M  20% /boot
/dev/sda3                     2.0G  453M  1.6G  23% /var
tmpfs                          98M  4.0K   98M   1% /run/user/42
tmpfs                          98M   24K   98M   1% /run/user/0
/dev/sr0                      8.1G  8.1G     0 100% /run/media/root/CentOS 7 x86_64
192.168.46.85:/auto/sharedir   97M  5.3M   92M   6% /test_nfs_c1
[root@localhost ~]#
[root@localhost ~]# cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Thu Jan 11 13:46:02 2018
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=bbfd7ee6-e6db-40ef-8ed1-03b0efff5577 /                       xfs     defaults        0 0
UUID=4eaedded-01f7-4013-a328-364dfe587223 /boot                   xfs     defaults        0 0
UUID=bfcdb9c5-05c7-49ba-b530-8d4aedd39841 /home                   xfs     defaults        0 0
UUID=d2a7fb6a-fe3b-4022-93b0-8e4f6044cfb8 /var                    xfs     defaults        0 0
UUID=3e93d164-8196-471f-90a9-0f1937711e92 swap                    swap    defaults        0 0
/dev/sdb1 /auto/sharedir xfs defaults 0 0
/dev/sdb3 /server_auto xfs defaults 0 0
[root@localhost ~]#
[root@localhost ~]# mkdir /server_auto
[root@localhost ~]#
[root@localhost ~]# mount /dev/sdb3 /server_auto
[root@localhost ~]#
[root@localhost ~]# df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/sda6                      13G  7.4G  5.6G  57% /
devtmpfs                      474M     0  474M   0% /dev
tmpfs                         488M     0  488M   0% /dev/shm
tmpfs                         488M  7.1M  481M   2% /run
tmpfs                         488M     0  488M   0% /sys/fs/cgroup
/dev/sdb1                      97M  5.2M   92M   6% /auto/sharedir
/dev/sda5                     197M   16M  181M   9% /home
/dev/sda1                     997M  194M  803M  20% /boot
/dev/sda3                     2.0G  453M  1.6G  23% /var
tmpfs                          98M  4.0K   98M   1% /run/user/42
tmpfs                          98M   24K   98M   1% /run/user/0
/dev/sr0                      8.1G  8.1G     0 100% /run/media/root/CentOS 7 x86_64
192.168.46.85:/auto/sharedir   97M  5.3M   92M   6% /test_nfs_c1
/dev/sdb3                     297M   16M  282M   6% /server_auto

 

// ② autofs 설치

[root@localhost ~]# rpm -qa | grep autofs
[root@localhost ~]#
[root@localhost ~]# yum install autofs*
Loaded plugins: fastestmirror, langpacks
base                                                                 | 3.6 kB  00:00:00    
extras                                                               | 3.4 kB  00:00:00    
updates                                                              | 3.4 kB  00:00:00    
updates/7/x86_64/primary_db                                          | 6.0 MB  00:00:00    
Loading mirror speeds from cached hostfile
 * base: ftp.iij.ad.jp
 * extras: ftp.iij.ad.jp
 * updates: ftp.iij.ad.jp
Resolving Dependencies
--> Running transaction check
---> Package autofs.x86_64 1:5.0.7-70.el7_4.1 will be installed
--> Processing Dependency: libhesiod.so.0()(64bit) for package: 1:autofs-5.0.7-70.el7_4.1.x86_64
--> Running transaction check
---> Package hesiod.x86_64 0:3.2.1-3.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

============================================================================================
 Package           Arch              Version                       Repository          Size
============================================================================================
Installing:
 autofs            x86_64            1:5.0.7-70.el7_4.1            updates            809 k
Installing for dependencies:
 hesiod            x86_64            3.2.1-3.el7                   base                30 k

Transaction Summary
============================================================================================
Install  1 Package (+1 Dependent package)

Total download size: 839 k
Installed size: 5.1 M
Is this ok [y/d/N]: y
Downloading packages:
(1/2): hesiod-3.2.1-3.el7.x86_64.rpm                                 |  30 kB  00:00:00    
(2/2): autofs-5.0.7-70.el7_4.1.x86_64.rpm                            | 809 kB  00:00:01    
--------------------------------------------------------------------------------------------
Total                                                       598 kB/s | 839 kB  00:00:01    
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : hesiod-3.2.1-3.el7.x86_64                                                1/2
  Installing : 1:autofs-5.0.7-70.el7_4.1.x86_64                                         2/2
  Verifying  : 1:autofs-5.0.7-70.el7_4.1.x86_64                                         1/2
  Verifying  : hesiod-3.2.1-3.el7.x86_64                                                2/2

Installed:
  autofs.x86_64 1:5.0.7-70.el7_4.1                                                         

Dependency Installed:
  hesiod.x86_64 0:3.2.1-3.el7                                                              

Complete!

 

[root@localhost ~]# rpm -qa | grep autofs
autofs-5.0.7-70.el7_4.1.x86_64

 

// ③

[root@localhost ~]# ls -l /etc/autofs.conf
-rw-r--r-- 1 root root 14392 12월  1 04:17 /etc/autofs.conf
[root@localhost ~]#
[root@localhost ~]# vi /etc/autofs.conf

 45 browse_mode = yes
:wq

[root@localhost ~]# vi /etc/auto.master

 7 /misc   /etc/auto.misc

// ④

[root@localhost ~]# systemctl restart autofs.service
[root@localhost ~]#
[root@localhost ~]# systemctl is-active autofs.service
active
[root@localhost ~]#
[root@localhost ~]# systemctl -l status autofs.service
● autofs.service - Automounts filesystems on demand
   Loaded: loaded (/usr/lib/systemd/system/autofs.service; disabled; vendor preset: disabled)
   Active: active (running) since 금 2018-01-26 14:31:45 KST; 1min 9s ago
  Process: 14645 ExecStart=/usr/sbin/automount $OPTIONS --pid-file /run/autofs.pid (code=exited, status=0/SUCCESS)
 Main PID: 14647 (automount)
   CGroup: /system.slice/autofs.service
           └─14647 /usr/sbin/automount --pid-file /run/autofs.pid

 1월 26 14:31:35 localhost.localdomain automount[14647]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:31:35 localhost.localdomain automount[14647]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:31:37 localhost.localdomain automount[14647]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:31:39 localhost.localdomain automount[14647]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:31:41 localhost.localdomain automount[14647]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:31:43 localhost.localdomain automount[14647]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:31:45 localhost.localdomain automount[14647]: problem reading master map, maximum wait exceeded
 1월 26 14:31:45 localhost.localdomain automount[14647]: /usr/sbin/automount: warning: could not read at least one map source after waiting, continuing ...
 1월 26 14:31:45 localhost.localdomain automount[14647]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:31:45 localhost.localdomain systemd[1]: Started Automounts filesystems on demand.
[root@localhost ~]#
[root@localhost ~]#

[root@localhost ~]# vi /etc/auto.misc
16 test_autofs      -rw,intr  192.168.46.85:/server_auto

// ④

[root@localhost ~]# systemctl restart autofs.service
[root@localhost ~]# systemctl -l status autofs.service
● autofs.service - Automounts filesystems on demand
   Loaded: loaded (/usr/lib/systemd/system/autofs.service; disabled; vendor preset: disabled)
   Active: active (running) since 금 2018-01-26 14:39:19 KST; 16s ago
  Process: 14935 ExecStart=/usr/sbin/automount $OPTIONS --pid-file /run/autofs.pid (code=exited, status=0/SUCCESS)
 Main PID: 14937 (automount)
   CGroup: /system.slice/autofs.service
           └─14937 /usr/sbin/automount --pid-file /run/autofs.pid

 1월 26 14:39:09 localhost.localdomain automount[14937]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:39:09 localhost.localdomain automount[14937]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:39:11 localhost.localdomain automount[14937]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:39:13 localhost.localdomain automount[14937]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:39:15 localhost.localdomain automount[14937]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:39:17 localhost.localdomain automount[14937]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:39:19 localhost.localdomain automount[14937]: problem reading master map, maximum wait exceeded
 1월 26 14:39:19 localhost.localdomain automount[14937]: /usr/sbin/automount: warning: could not read at least one map source after waiting, continuing ...
 1월 26 14:39:19 localhost.localdomain automount[14937]: open_sss_lib:78: lookup(sss): failed to open /usr/lib64/sssd/modules/libsss_autofs.so: /usr/lib64/sssd/modules/libsss_autofs.so: cannot open shared object file: No such file or directory
 1월 26 14:39:19 localhost.localdomain systemd[1]: Started Automounts filesystems on demand.
[root@localhost ~]#
[root@localhost ~]# ls -l /misc/
합계 0
dr-xr-xr-x 2 root root 0  1월 26 14:39 cd
dr-xr-xr-x 2 root root 0  1월 26 14:39 test_autofs
[root@localhost ~]#
[root@localhost ~]# df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/sda6                      13G  7.4G  5.6G  57% /
devtmpfs                      474M     0  474M   0% /dev
tmpfs                         488M     0  488M   0% /dev/shm
tmpfs                         488M  7.1M  481M   2% /run
tmpfs                         488M     0  488M   0% /sys/fs/cgroup
/dev/sdb1                      97M  5.2M   92M   6% /auto/sharedir
/dev/sda5                     197M   16M  181M   9% /home
/dev/sda1                     997M  194M  803M  20% /boot
/dev/sda3                     2.0G  456M  1.5G  23% /var
tmpfs                          98M  4.0K   98M   1% /run/user/42
tmpfs                          98M   24K   98M   1% /run/user/0
/dev/sr0                      8.1G  8.1G     0 100% /run/media/root/CentOS 7 x86_64
192.168.46.85:/auto/sharedir   97M  5.3M   92M   6% /test_nfs_c1
/dev/sdb3                     297M   16M  282M   6% /server_auto
[root@localhost ~]#

 

// ⑤

[root@localhost ~]# cat /etc/auto.misc
#
# This is an automounter map and it has the following format
# key [ -mount-options-separated-by-comma ] location
# Details may be found in the autofs(5) manpage

cd  -fstype=iso9660,ro,nosuid,nodev :/dev/cdrom

# the following entries are samples to pique your imagination
#linux  -ro,soft,intr  ftp.example.org:/pub/linux
#boot  -fstype=ext2  :/dev/hda1
#floppy  -fstype=auto  :/dev/fd0
#floppy  -fstype=ext2  :/dev/fd0
#e2floppy -fstype=ext2  :/dev/fd0
#jaz  -fstype=ext2  :/dev/sdc1
#removable -fstype=ext2  :/dev/hdd
test_autofs   -rw,intr  192.168.46.85:/server_auto
[root@localhost ~]#
[root@localhost ~]# ls -l /misc/test_autofs/ /server_auto/
/misc/test_autofs/:
합계 0

/server_auto/:
합계 0
[root@localhost ~]#
[root@localhost ~]# touch /misc/test_autofs/testfile1
[root@localhost ~]#
[root@localhost ~]# ls -l /misc/test_autofs/ /server_auto
/misc/test_autofs/:
합계 0
-rw-r--r-- 1 root root 0  1월 26 14:44 testfile1

/server_auto:
합계 0
-rw-r--r-- 1 root root 0  1월 26 14:44 testfile1
[root@localhost ~]#

==============================

// 실습_ 쌤 풀이

 

[server]

① format

② nfs service 관련 :  /etc/exports 에서 공유 디렉터리 설정  ★

    mount?

(장치 2개니까 공유디렉터리도 2개 생성해야..,)

# vi /etc/exports
/server_auto    192.168.46.85(rw,no_root_squash,sync)

:wq
# exportfs -ra
# mount /dev/sdb3 /sever_auto

 

③ automount

# vi /etc/fstab

/dev/sdb3       /server_auto    xfs     defaults        0 0

---------------------------------------------

[client]

① autofs 설치

# rpm -qa | grep autofs

# yum install autofs*

y

② autofs 환경설정파일 : /etc/autofs.conf

mount 관련 파일 : /etc/auto.misc

 

# vi /etc/autofs.conf

45 browse_mode = yes

# vi /etc/auto.misc

16 test_autofs      -rw,intr  192.168.46.85:/server_auto        // client가 사용할 mount pt. 이름

// ↑ client사용 영역 => client_autofs 라고 바꿔야징..,

:wq

 

③ autofs 재 시작

# systemctl restart autofs.service
# ls -l /misc
합계 0
dr-xr-xr-x 2 root root 0  1월 26 15:06 cd
dr-xr-xr-x 2 root root 0  1월 26 15:06 test_autofs

# ls -l /misc/test_autofs/ /server_auto/
/misc/test_autofs/:
합계 0
-rw-r--r-- 1 root root 0  1월 26 14:44 testfile1

/server_auto/:
합계 0
-rw-r--r-- 1 root root 0  1월 26 14:44 testfile1

 

-----------------------------------------------

// 확인

[server]

[root@localhost ~]# systemctl restart nfs.service
[root@localhost ~]#
[root@localhost ~]# ls -l /server_auto/
합계 0
-rw-r--r-- 1 root root 0  1월 26 14:44 testfile1
-rw-r--r-- 1 root root 0  1월 26 15:09 testfile2
[root@localhost ~]#
[root@localhost ~]#

[client]

[root@localhost ~]# systemctl restart autofs.service
[root@localhost ~]#
[root@localhost ~]# ls -l /misc/
합계 0
dr-xr-xr-x 2 root root 0  1월 26 15:15 cd
dr-xr-xr-x 2 root root 0  1월 26 15:15 test_autofs
[root@localhost ~]#
[root@localhost ~]# ls -l /misc/test_autofs/
합계 0
-rw-r--r-- 1 root root 0  1월 26 14:44 testfile1
-rw-r--r-- 1 root root 0  1월 26 15:09 testfile2
[root@localhost ~]#
[root@localhost ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda6        13G  7.4G  5.6G  57% /
devtmpfs        474M     0  474M   0% /dev
tmpfs           488M     0  488M   0% /dev/shm
tmpfs           488M  7.1M  481M   2% /run
tmpfs           488M     0  488M   0% /sys/fs/cgroup
/dev/sdb1        97M  5.2M   92M   6% /auto/sharedir
/dev/sdb3       297M   16M  282M   6% /server_auto
/dev/sda5       197M   16M  181M   9% /home
/dev/sda3       2.0G  456M  1.5G  23% /var
/dev/sda1       997M  194M  803M  20% /boot
tmpfs            98M  4.0K   98M   1% /run/user/42
tmpfs            98M   16K   98M   1% /run/user/0
/dev/sr0        8.1G  8.1G     0 100% /run/media/root/CentOS 7 x86_64
[root@localhost ~]#

 

=> 다음 실습은,

① server restart 없이 되야 하고,

② 진짜로 서버, 클라이언트 2개 pc 이용!

 

==============================

* clinet, server snapshot 형태

 

// 요약

// autofs 설치

# rpm -qa | grep autofs
# yum install autofs*
Is this ok [y/d/N]: y

// /misc 하위 파일 설정

 

// autofs 재시작