CentOS7 编译安装snmpd，解决与与Mariadb10冲突问题

CentOS7安装了MariaDB10以后，无法使用yum安装snmp服务，会提示mariadb-libs与mariadb-common 10的冲突提示。翻墙在谷歌上查到有人说在特定版本的mariadb上fix了这个bug，但是不是全版本通用，所以很麻烦。

最后测试可以通过编译安装snmp解决这个问题。记录如下：

1、准备环境

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

2、编译和安装

首先我们需要下载Net-SNMP的源代码，

官方地址：

http://sourceforge.net/projects/net-snmp/files/net-snmp/

下载：net-snmp-5.7.3.tar.gz

接下来对下载的源代码包进行解压缩，

tar xzvfnet-snmp-5.7.3.tar.gz

然后通过configure来生成编译规则，

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

选项，可以让服务器支持磁盘I/O监控。

回车出现下面问题，可以直接回车而不用回答，系统会采用默认信息，其中日志文件默认安装在/var/log/snmpd.log.数据存贮目录默认存放在/var/net-snmp下。

配置默认snmp协议版本(1,2c,3)，配置为v3版的话，支持登录验证功能，相对来说更安全了

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

配置该设备的联系人信息，也可以是邮箱地址

--with-sys-contact=robin

配置该系统设备的地理位置

--with-sys-location="shanghai"

配置日志文件位置

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

配置数据存储目录

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

接下来，开始编译和安装：

make&& make install

到现在为止，我们已经有了可以运行的SNMP代理程序，它位于/server/snmp/sbin/snmpd，在启动它之前，我们还要进行一些必要的设置。

当然，路径什么的，可以根据需要调整。

3.创建并配置snmp配置文件

Vi/etc/snmpd/snmpd.conf #创建并编辑snmpd配置文件

代码如下：

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

# 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.创建snmp服务

进入源码目录，如/usr/local/src/net-snmp-5.7.3目录，将启动配置文件范例复制到/etc/init.d/目录：

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

修改/etc/init.d/snmpd文件

将其中的

vi /etc/init.d/snmpd

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

修改为

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

将其中的

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

修改为

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

groupaddsnmp #添加apache用户组及用户

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

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

chmod +x/etc/init.d/snmpd

chkconfig--add snmpd #增加执行权限

chkconfig--level 2345 snmpd on #设置开机启动

chkconfig--list snmpd #查看是否设置成功

snmpd 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭

5.配置snmpd服务启动

systemctlenable snmpd #设置开机启动

systemctlstart snmpd #启动snmpd服务

其他的不多说了

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CentOS7 编译安装snmpd，解决与与Mariadb10冲突问题

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