Linuxコマンド | その他 | Sambaのインストールと使い方

LinuxにSambaをインストールし、共有ディレクトリの設定、Sambaユーザー管理、ファイアウォール設定、マウントを行う方法

Samba

Linuxで利用できるSambaは、特定のディレクトリを指定して他のOSと共有できるようにするプログラムです。

Windowsではワークグループ(WORK GROUP)内でディレクトリ共有などを比較的簡単に行えます。一方、LinuxではNFSやSambaを利用して、ディレクトリを他のOSと共有できます。

運用中のサーバーの中にバックアップサーバーとして使っているものがあり、以前は必要なときだけFTPで接続してファイルを保管していました。

しかし、サービス中のプログラムやログなどの二次バックアップのため、そのバックアップサーバーへ追加バックアップを行うことにしました。そこでバックアップサーバーにSambaをインストールし、各サービスサーバーから共有ディレクトリをマウントして自動的にバックアップされるように構成しました。

ここでは、LinuxにSambaをインストールし、別のOSからマウントして利用する方法を説明します。

Sambaサーバーのインストール

Sambaパッケージのインストール

$ yum install -y samba

設定

$ vi /etc/samba/smb.conf

# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options (perhaps too
# many!) most of which are not shown in this example
#
# For a step to step guide on installing, configuring and using samba,
# read the Samba-HOWTO-Collection. This may be obtained from:
#  http://www.samba.org/samba/docs/Samba-HOWTO-Collection.pdf
#
# Many working examples of smb.conf files can be found in the
# Samba-Guide which is generated daily and can be downloaded from:
#  http://www.samba.org/samba/docs/Samba-Guide.pdf
#
# Any line which starts with a ; (semi-colon) or a # (hash)
# is a comment and is ignored. In this example we will use a #
# for commentry and a ; for parts of the config file that you
# may wish to enable
#
# NOTE: Whenever you modify this file you should run the command "testparm"
# to check that you have not made any basic syntactic errors.
#
#---------------
# SELINUX NOTES:
#
# If you want to use the useradd/groupadd family of binaries please run:
# setsebool -P samba_domain_controller on
#
# If you want to share home directories via samba please run:
# setsebool -P samba_enable_home_dirs on
#
# If you create a new directory you want to share you should mark it as
# "samba_share_t" so that selinux will let you write into it.
# Make sure not to do that on system directories as they may already have
# been marked with othe SELinux labels.
#
# Use ls -ldZ /path to see which context a directory has
#
# Set labels only on directories you created!
# To set a label use the following: chcon -t samba_share_t /path
#
# If you need to share a system created directory you can use one of the
# following (read-only/read-write):
# setsebool -P samba_export_all_ro on
# or
# setsebool -P samba_export_all_rw on
#
# If you want to run scripts (preexec/root prexec/print command/...) please
# put them into the /var/lib/samba/scripts directory so that smbd will be
# allowed to run them.
# Make sure you COPY them and not MOVE them so that the right SELinux context
# is applied, to check all is ok use restorecon -R -v /var/lib/samba/scripts
#
#--------------
#
#======================= Global Settings =====================================

[global]

# ----------------------- Network Related Options -------------------------
#
# workgroup = NT-Domain-Name or Workgroup-Name, eg: MIDEARTH
#
# server string is the equivalent of the NT Description field
#
# netbios name can be used to specify a server name not tied to the hostname
#
# Interfaces lets you configure Samba to use multiple interfaces
# If you have multiple network interfaces then you can list the ones
# you want to listen on (never omit localhost)
#
# Hosts Allow/Hosts Deny lets you restrict who can connect, and you can
# specifiy it as a per share option as well
#
    workgroup = MYGROUP    // Windowsで共有されるworkgroup名
    server string = Samba Server Version %v        // 共有されるサーバー名

;    netbios name = MYSERVER

;    interfaces = lo eth0 192.168.12.2/24 192.168.13.2/24
    hosts allow = 127. 192.168.12. 192.168.13.
    // 許可するIPまたはIP範囲を指定

# --------------------------- Logging Options -----------------------------
#
# Log File let you specify where to put logs and how to split them up.
#
# Max Log Size let you specify the max size log files should reach

    # logs split per machine
    log file = /var/log/samba/log.%m
    # max 50KB per log file, then rotate
    max log size = 50

# ----------------------- Standalone Server Options ------------------------
#
# Scurity can be set to user, share(deprecated) or server(deprecated)
#
# Backend to store user information in. New installations should
# use either tdbsam or ldapsam. smbpasswd is available for backwards
# compatibility. tdbsam requires no further configuration.

    security = user        // LinuxアカウントIDで接続可能(share: ユーザー認証なしですべて接続可能)
    passdb backend = tdbsam


# ----------------------- Domain Members Options ------------------------
#
# Security must be set to domain or ads
#
# Use the realm option only with security = ads
# Specifies the Active Directory realm the host is part of
#
# Backend to store user information in. New installations should
# use either tdbsam or ldapsam. smbpasswd is available for backwards
# compatibility. tdbsam requires no further configuration.
#
# Use password server option only with security = server or if you can't
# use the DNS to locate Domain Controllers
# The argument list may include:
#   password server = My_PDC_Name [My_BDC_Name] [My_Next_BDC_Name]
# or to auto-locate the domain controller/s
#   password server = *


;    security = domain
;    passdb backend = tdbsam
;    realm = MY_REALM

;    password server = <NT-Server-Name>

# ----------------------- Domain Controller Options ------------------------
#
# Security must be set to user for domain controllers
#
# Backend to store user information in. New installations should
# use either tdbsam or ldapsam. smbpasswd is available for backwards
# compatibility. tdbsam requires no further configuration.
#
# Domain Master specifies Samba to be the Domain Master Browser. This
# allows Samba to collate browse lists between subnets. Don't use this
# if you already have a Windows NT domain controller doing this job
#
# Domain Logons let Samba be a domain logon server for Windows workstations.
#
# Logon Scrpit let yuou specify a script to be run at login time on the client
# You need to provide it in a share called NETLOGON
#
# Logon Path let you specify where user profiles are stored (UNC path)
#
# Various scripts can be used on a domain controller or stand-alone
# machine to add or delete corresponding unix accounts
#
;    security = user
;    passdb backend = tdbsam

;    domain master = yes
;    domain logons = yes

    # the login script name depends on the machine name
;    logon script = %m.bat
    # the login script name depends on the unix user used
;    logon script = %u.bat
;    logon path = \\%L\Profiles\%u
    # disables profiles support by specifing an empty path
;    logon path =

;    add user script = /usr/sbin/useradd "%u" -n -g users
;    add group script = /usr/sbin/groupadd "%g"
;    add machine script = /usr/sbin/useradd -n -c "Workstation (%u)" -M -d /nohome -s /bin/false "%u"
;    delete user script = /usr/sbin/userdel "%u"
;    delete user from group script = /usr/sbin/userdel "%u" "%g"
;    delete group script = /usr/sbin/groupdel "%g"


# ----------------------- Browser Control Options ----------------------------
#
# set local master to no if you don't want Samba to become a master
# browser on your network. Otherwise the normal election rules apply
#
# OS Level determines the precedence of this server in master browser
# elections. The default value should be reasonable
#
# Preferred Master causes Samba to force a local browser election on startup
# and gives it a slightly higher chance of winning the election
;    local master = no
;    os level = 33
;    preferred master = yes

#----------------------------- Name Resolution -------------------------------
# Windows Internet Name Serving Support Section:
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
#
# - WINS Support: Tells the NMBD component of Samba to enable it's WINS Server
#
# - WINS Server: Tells the NMBD components of Samba to be a WINS Client
#
# - WINS Proxy: Tells Samba to answer name resolution queries on
#   behalf of a non WINS capable client, for this to work there must be
#   at least one    WINS Server on the network. The default is NO.
#
# DNS Proxy - tells Samba whether or not to try to resolve NetBIOS names
# via DNS nslookups.

;    wins support = yes
;    wins server = w.x.y.z
;    wins proxy = yes

;    dns proxy = yes

# --------------------------- Printing Options -----------------------------
#
# Load Printers let you load automatically the list of printers rather
# than setting them up individually
#
# Cups Options let you pass the cups libs custom options, setting it to raw
# for example will let you use drivers on your Windows clients
#
# Printcap Name let you specify an alternative printcap file
#
# You can choose a non default printing system using the Printing option

    load printers = yes
    cups options = raw

;    printcap name = /etc/printcap
    #obtain list of printers automatically on SystemV
;    printcap name = lpstat
;    printing = cups

# --------------------------- Filesystem Options ---------------------------
#
# The following options can be uncommented if the filesystem supports
# Extended Attributes and they are enabled (usually by the mount option
# user_xattr). Thess options will let the admin store the DOS attributes
# in an EA and make samba not mess with the permission bits.
#
# Note: these options can also be set just per share, setting them in global
# makes them the default for all shares

;    map archive = no
;    map hidden = no
;    map read only = no
;    map system = no
;    store dos attributes = yes


#============================ Share Definitions ==============================

[sambaDir]
    comment = Test
    path = /data/sambaDir    // 共有ディレクトリ
    browseable = no
    writable = yes        // 読み書きを許可するオプション
    valid users = tour    // 特定のアカウントだけ共有を許可


[homes]
    comment = Home Directories
    browseable = no
    writable = yes
;    valid users = %S
;    valid users = MYDOMAIN\%S

[printers]
    comment = All Printers
    path = /var/spool/samba
    browseable = no
    guest ok = no
    writable = no
    printable = yes

# Un-comment the following and create the netlogon directory for Domain Logons
;    [netlogon]
;    comment = Network Logon Service
;    path = /var/lib/samba/netlogon
;    guest ok = yes
;    writable = no
;    share modes = no


# Un-comment the following to provide a specific roving profile share
# the default is to use the user's home directory
;    [Profiles]
;    path = /var/lib/samba/profiles
;    browseable = no
;    guest ok = yes


# A publicly accessible directory, but read only, except for people in
# the "staff" group
;    [public]
;    comment = Public Stuff
;    path = /home/samba
;    public = yes
;    writable = yes
;    printable = no
;    write list = +staff

Sambaサービスの起動・停止・再起動

Sambaの起動

$ service smb start
SMBサービスを起動しています:                              [  OK  ]

Sambaの停止

$ service smb stop
SMBサービスを停止しています:                              [  OK  ]

Sambaの再起動

$ service smb restart
SMBサービスを起動しています:                              [  OK  ]
SMBサービスを停止しています:                              [  OK  ]

ログインアカウントのパスワード指定

接続方式をsecurity = userにした場合、Linuxアカウントとは別にSambaパスワードを登録する必要があります。

tourアカウントのパスワード指定

$ smbpasswd -a tour

tourアカウントのSambaアカウント削除

$ smbpasswd -x tour

tourアカウントのSamba利用停止

$ smbpasswd -d tour

iptablesファイアウォールルールの追加(iptables利用時)

iptables設定ファイルを開く

$ vi /etc/sysconfig/iptables

次の内容を追加して保存する

-A INPUT -m state --state NEW -m tcp -p tcp --dport 139 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 445 -j ACCEPT

iptablesを再起動する

$ service iptables restart
iptables: チェーンをACCEPTルールに設定中:  filter          [  OK  ]
iptables: ファイアウォールルールを削除中:                  [  OK  ]
iptables: モジュールをアンロード中:                        [  OK  ]
iptables: ファイアウォールルールを適用中:                  [  OK  ]

Sambaディレクトリをマウントする

ディレクトリを作成する

$ cd /mnt
$ mkdir sambaDir

ディレクトリをマウントする

// SambaサーバーのIP(192.168.0.23)、共有ディレクトリ、マウント先ディレクトリを指定
$ mount -t cifs -o username=tour //192.168.0.23/sambaDir /mnt/sambaDir

起動時にSambaディレクトリをマウントする

$ vi /etc/fstab

// 次の内容を追加
//192.168.0.23/sambaDir   /mnt/sambaDir      cifs    username='tour',password='abcd!@'   0 0

TIP) 一般ユーザーアカウントでマウントする場合は、次のようにユーザーのuidgidを追加します。

tourアカウントのuid確認(tourアカウントでログインした状態)

$ id
uid=500(tour) gid=500(tour) groups=500(tour)

tourアカウントとしてマウント(rootアカウントでログインした状態)

$ mount -t cifs -o username=tour,uid=500,gid=500 //192.168.0.23/sambaDir /mnt/sambaDir

fstabにもuid、gidを追加する

//192.168.0.23/sambaDir   /mnt/sambaDir     cifs    username='tour',password='abcd!@',uid=500,gid=500   0 0

マウントを確認した後、共有ディレクトリにファイルを作成したりディレクトリを作成したりして、正常に作成できるか確認します。
もし「権限がありません」などのエラーが出る場合は、SambaサーバーのSELinuxが有効になっているか確認し、SELinuxを無効にしてからテストします。

SELinuxを無効にする(Sambaサーバー側)

$ setenforce 0

出典