CentOS7安裝了MariaDB10以後，無法使用yum安裝snmp服務，會提示mariadb-libs與mariadb-common 10的衝突提示。翻牆在谷歌上查到有人說在特定版本的mariadb上fix了這個bug，但是不是全版本通用，所以很麻煩。

最後測試可以通過編譯安裝snmp解決這個問題。記錄如下：

1、準備環境

yum -y installmake gcc gcc-c++ gcc-g77 openssl openssl-devel

2、編譯和安裝

首先我們需要下載Net-SNMP的原始碼，

官方地址：

下載：net-snmp-5.7.3.tar.gz

接下來對下載的原始碼包進行解壓縮，

tar xzvfnet-snmp-5.7.3.tar.gz

然後通過configure來生成編譯規則，

cdnet-snmp-5.7.3

./configure \

--prefix=/usr/local/snmp \

--with-mib-modules=ucd-snmp/diskio\

--with-default-snmp-version="2" \

--with-sys-contact=Robin \

--with-sys-location="shanghai"\

--with-logfile="/server/snmp/log/snmpd.log"\

--with-persistent-directory="/var/net-snmp"

注意，以上的

--with-mib-modules=ucd-snmp/diskio

選項，可以讓伺服器支援磁碟I/O監控。

回車出現下面問題，可以直接回車而不用回答，系統會採用預設資訊，其中日誌檔案預設安裝在/var/log/snmpd.log.資料存貯目錄預設存放在/var/net-snmp下。

配置預設snmp協議版本(1,2c,3)，配置為v3版的話，支援登入驗證功能，相對來說更安全了

--with-default-snmp-version="2"

配置該裝置的聯絡人資訊，也可以是郵箱地址

--with-sys-contact=robin

配置該系統裝置的地理位置

--with-sys-location="shanghai"

配置日誌檔案位置

--with-logfile="/server/snmp/log/snmpd.log"

配置資料儲存目錄

--with-persistent-directory="/var/net-snmp"

接下來，開始編譯和安裝：

make&& make install

到現在為止，我們已經有了可以執行的SNMP代理程式，它位於/server/snmp/sbin/snmpd，在啟動它之前，我們還要進行一些必要的設定。

當然，路徑什麼的，可以根據需要調整。

3.建立並配置snmp配置檔案

Vi/etc/snmpd/snmpd.conf  #建立並編輯snmpd配置檔案

程式碼如下：

###############################################################################

#

# EXAMPLE.conf:

#   An example configuration file forconfiguring the ucd-snmp snmpd agent.

#

###############################################################################

#

# This file isintended to only be an example.  If,however, you want

# to use it, itshould be placed in /usr/local/net-snmp/etc/snmp/snmpd.conf.

# When the snmpdagent starts up, this is where it will look for it.

#

# You might beinterested in generating your own snmpd.conf file using

# the"snmpconf" program (perl script) instead.  It's a nice menu

# based interface towriting well commented configuration files. Try it!

#

# Note: This file isautomatically generated from EXAMPLE.conf.def.

# Do NOT read theEXAMPLE.conf.def file! Instead, after you have run

# configure &make, and then make sure you read the EXAMPLE.conf file

# instead, as itwill tailor itself to your configuration.

# All linesbeginning with a '#' are comments and are intended for you

# to read.  All other lines are configuration commandsfor the agent.

#

# PLEASE: read thesnmpd.conf(5) manual page as well!

#

###############################################################################

# Access Control

###############################################################################

# YOU SHOULD CHANGETHE "COMMUNITY" TOKEN BELOW TO A NEW KEYWORD ONLY

# KNOWN AT YOURSITE.  YOU *MUST* CHANGE THE NETWORKTOKEN BELOW TO

# SOMETHINGREFLECTING YOUR LOCAL NETWORK ADDRESS SPACE.

# By far, the mostcommon question I get about the agent is "why won't

# it work?",when really it should be "how do I configure the agent to

# allow me to accessit?"

#

# By default, theagent responds to the "public" community for read

# only access, ifrun out of the box without any configuration file in

# place.  The following examples show you other ways ofconfiguring

# the agent so thatyou can change the community names, and give

# yourself writeaccess as well.

#

# The followinglines change the access permissions of the agent so

# that the COMMUNITYstring provides read-only access to your entire

# NETWORK (EG:10.10.10.0/24), and read/write access to only the

# localhost(127.0.0.1, not its real ipaddress).

#

# For moreinformation, read the FAQ as well as the snmpd.conf(5)

# manual page.

####

# First, map thecommunity name (COMMUNITY) into a security name

# (local andmynetwork, depending on where the request is coming

# from):

#       sec.name source          community

#com2sec  mynetwork  127.0.0.1       public

com2sec  mynetwork  default    public

#com2sec  mynetwork 60.195.252.107   public

#com2sec  mynetwork 60.195.252.110   public

####

# Second, map thesecurity name into a group name:

#       groupName      securityModel securityName

#group   notConfigGroup v1           notConfigUser

#group   notConfigGroup v2c           notConfigUser

group    my_group       v1            mynetwork

group    my_group       v2c           mynetwork

####

# Third, create aview for us to let the group have rights to:

# Make at least  snmpwalk -v 1 localhost -c public system fastagain.

#       name           incl/excl     subtree         mask(optional)

view    systemview    included  .1.3.6.1.2.1.1

view    systemview    included  .1.3.6.1.2.1.25.1.1

view    all     included   .1                 80

####

# Finally, grant thegroup read-only access to the systemview view.

#       group          context sec.model sec.level prefixread   write  notif

#access  notConfigGroup ""      any      noauth    exact  systemview none none

access   my_group ""      any       noauth   exact  all none none

#-----------------------------------------------------------------------------

4.建立snmp服務

進入原始碼目錄，如/usr/local/src/net-snmp-5.7.3目錄，將啟動配置檔案範例複製到/etc/init.d/目錄：

cp/usr/local/src/net-snmp-5.7.3/dist/snmpd-init.d /etc/init.d/snmpd

修改/etc/init.d/snmpd檔案

將其中的

vi /etc/init.d/snmpd

prog="/usr/local/sbin/snmpd"

修改為

prog="/usr/local/snmp/sbin/snmpd"

將其中的

[ -x $prog -a -f/usr/local/share/snmp/snmpd.conf ] || exit 0

修改為

[ -x $prog -a -f/etc/snmp/snmpd.conf ] || exit 0

groupaddsnmp #新增apache使用者組及使用者

useradd -g snmp -s/usr/sbin/nologin apache

chown -R snmp:snmp/usr/local/apache2

chmod +x/etc/init.d/snmpd

chkconfig--add snmpd    #增加執行許可權

chkconfig--level 2345 snmpd on  #設定開機啟動

chkconfig--list snmpd    #檢視是否設定成功

snmpd          0:關閉    1:關閉    2:啟用    3:啟用    4:啟用    5:啟用    6:關閉

5.配置snmpd服務啟動

systemctlenable snmpd  #設定開機啟動

systemctlstart snmpd #啟動snmpd服務

其他的不多說了