标签归档:代理

Centos 7 Zabbix Agent 客户端源码编译安装配置

Zabbix Agent 安装在远程系统上,需要通过Zabbix服务器进行监控。Zabbix Agent在客户端系统上收集资源利用和应用程序数据,并向Zabbix服务器提供这些信息。Zabbix支持Ping,ZBX、SNMP、JMX、IPMI等监控方式。

1.安装扩展包以及依赖包

$ yum -y install epel-release
$ yum install pcre pcre-devel openssl openssl-devel -y

2.添加Zabbix用户和组

$ groupadd zabbix
$ useradd zabbix -g zabbix -s /sbin/nologin

3.安装Zabbix-Agent

下载地址://www.zabbix.com/download

$ cd /tmp
$ tar -zxvf zabbix-3.4.2.tar.gz
$ cd zabbix-3.4.2
$ ./configure --prefix=/usr/local/zabbix --enable-agent --with-mysql --with-openssl
$ make && make install

4.创建Zabbix日志目录并生成(PSK)密钥

$ mkdir -p /usr/local/zabbix/logs/
$ chown -R zabbix.zabbix /usr/local/zabbix
$ sh -c "openssl rand -hex 32 > /usr/local/zabbix/etc/zabbix_agentd.psk"
$ cat /usr/local/zabbix/etc/zabbix_agentd.psk
fd1ac849e5f787dfc04300ae997d158e6f6f0c2209d66e7d2e687da2032ecbae

5.配置zabbix_agentd.conf

以下是配置完成后的内容:

$ egrep -v "(^#|^$)" /usr/local/zabbix/etc/zabbix_agentd.conf

EnableRemoteCommands=1 #来至zabbix服务器的远程命令是否允许被执行
PidFile=/usr/local/zabbix/zabbix_agentd.pid
LogFile=/usr/local/zabbix/logs/zabbix_agentd.log
Server=10.10.204.65 #Zabbix Server IP 地址
ServerActive=10.10.204.65 #地址同上 主动向 Zabbix Server 发送监控内容
Hostname=101020465 #本机主机名 内容要和Zabbix Server 配置的 Host Name 一致
HostMetadataItem=system.uname #用于Item获取数据
User=zabbix
UnsafeUserParameters=1 #是否启用自定义key,zabbix监控mysql、tomcat等数据时需要自定义key
#下面使用预共享密钥(PSK)来保护服务器和客户端之间的连接
TLSConnect=psk
TLSAccept=psk
TLSPSKIdentity=PSK 001
TLSPSKFile=/usr/local/zabbix/etc/zabbix_agentd.psk

注意:关于更多Agent配置参数优化,请参阅这里Zabbix agent (UNIX)

6.创建systemctl系统Zabbix agent 单元文件

$ vim /usr/lib/systemd/system/zabbix-agent.service

[Unit]
Description=Zabbix Agent
After=syslog.target
After=network.target

[Service]
Environment="CONFFILE=/usr/local/zabbix/etc/zabbix_agentd.conf"
#EnvironmentFile=/usr/local/zabbix/etc/zabbix_agentd.conf.d/
Type=forking
Restart=on-failure
#PIDFile=/tmp/zabbix_agentd.pid
KillMode=control-group
ExecStart=/usr/local/zabbix/sbin/zabbix_agentd -c $CONFFILE
ExecStop=/bin/kill -SIGTERM $MAINPID
RestartSec=10s

[Install]
WantedBy=multi-user.target

7.启动 Zabbix Agentd 客户端服务并加入开机自启动

$ systemctl start zabbix-agent
$ systemctl enable zabbix-agent

8.设置 Firewalld 防火墙

$ firewall-cmd --permanent --add-port=10050/tcp
$ firewall-cmd --reload

已经完成 Zabbix Agent 的安装。后期我还会写一些关于zabbix的使用以及优化。

Zabbix Agent配置完成后无法启动Permission denied

今天在节点机器上新安装的Zabbix Agent无法启动。

1.查看Zabbix Agent日志文件才究其原因。

# cat /var/log/zabbix/zabbix_agentd.log

63133:20170601:092700.920 **************************
63133:20170601:092700.920 using configuration file: /etc/zabbix/zabbix_agentd.conf
63133:20170601:092700.920 cannot set resource limit: [13] Permission denied
63133:20170601:092700.920 cannot disable core dump, exiting...
63137:20170601:092711.171 Starting Zabbix Agent [cong171163]. Zabbix 3.2.6 (revision 67849).
63137:20170601:092711.171 **** Enabled features ****
63137:20170601:092711.171 IPv6 support: YES
63137:20170601:092711.171 TLS support: YES
63137:20170601:092711.171 **************************
......

2.此时只需要关闭Selinux,两种方案;

2.1.临时关闭

# setenforce 0

2.2.永久关闭(reboot host)

# vim /etc/selinux/config

SELINUX=enforcing

SELINUX=disabled

3.操作完成后,再次启动zabbix-agent服务

# systemctl start zabbix-agent.service

4.查看端口

# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port 
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:* 
LISTEN 0 128 *:10050 *:*
LISTEN 0 80 :::3306 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
LISTEN 0 128 :::10050 :::*

zabbix agent启动成功,10050端口已经运行。

MariaDB MaxScale 2.1.3中间件数据库读写分离安装配置

操作系统:CentOS Linux release 7.3.1611 (Core)
数据库:MariaDB-10.2.6-linux-glibc_214-x86_64
MaxScale服务器:10.200.10.55
主服务器:172.16.8.56
从服务器:172.16.8.57
从服务器:172.16.8.58

1.maxscale的安装方式有很多,例如源码安装、rpm、二进制构建等,我选择二进制进行安装。

根据场景需要下载相对应的版本,下载地址;//mariadb.com/downloads/maxscale

[root@localhost ~]# groupadd maxscale
[root@localhost ~]# useradd -g maxscale maxscale
[root@localhost ~]# cd /usr/local
[root@localhost local]# wget //downloads.mariadb.com/MaxScale/2.1.3/centos/7server/x86_64/maxscale-2.1.3.centos.7.tar.gz
[root@localhost local]# tar zxvf maxscale-2.1.3.centos.7.tar.gz
[root@localhost local]# ln -s maxscale-2.1.3.centos.7 maxscale
[root@localhost local]# cd maxscale
[root@zhu56 maxscale]# chown -R maxscale var

建议创建软连接,这样有助于以后的版本升级及后期维护。

2.首次安装maxscale需要创建日志相关目录

[root@localhost ~]# mkdir /var/log/maxscale
[root@localhost ~]# mkdir /var/lib/maxscale
[root@localhost ~]# mkdir /var/run/maxscale
[root@localhost ~]# mkdir /var/cache/maxscale

3.以下目录必须具备maxscala用户权限

[root@localhost ~]# chown maxscale /var/log/maxscale
[root@localhost ~]# chown maxscale /var/lib/maxscale
[root@localhost ~]# chown maxscale /var/run/maxscale
[root@localhost ~]# chown maxscale /var/cache/maxscale

4.为了能让Maxscale能顺利启动,还需要创建配置文件,在Maxscale目录下有配置文件模板拷贝到etc下即可。

[root@localhost ~]# cp /usr/local/maxscale/etc/maxscale.cnf.template /etc/maxscale.cnf

5.在修改配置文件之前,需要在主服务器上创建一个用户并给予授权,而这个用户用于MySQL监控、路由功能

MariaDB [(none)]> create user 'jiankongdb'@'%' identified by 'jiankong123';
MariaDB [(none)]> grant SELECT on mysql.user to 'jiankongdb'@'%';
MariaDB [(none)]> GRANT SELECT ON mysql.db TO 'jiankongdb'@'%';
MariaDB [(none)]> GRANT SELECT ON mysql.tables_priv TO 'jiankongdb'@'%';
MariaDB [(none)]> GRANT SHOW DATABASES ON *.* TO 'jiankongdb'@'%';
MariaDB [(none)]> grant REPLICATION CLIENT on *.* to 'jiankongdb'@'%';

MariaDB [(none)]> GRANT replication slave, replication client,SELECT ON *.* TO jiankongdb@'%';

6.查看授权情况

MariaDB [(none)]> SHOW GRANTS FOR'jiankong'@'%';

7.接下来就开始修改maxscale.cnf配置文件,否则无法启动。

[root@localhost ~]# vim /etc/maxscale.cnf

# MaxScale documentation on GitHub:
# //github.com/mariadb-corporation/MaxScale/blob/2.1/Documentation/Documentation-Contents.md

# Global parameters
#
# Complete list of configuration options:
# //github.com/mariadb-corporation/MaxScale/blob/2.1/Documentation/Getting-Started/Configuration-Guide.md
#全局配置
[maxscale]
threads=1

# Server definitions
#
# Set the address of the server to the network
# address of a MySQL server.
#

[server1]
type=server
address=172.16.8.56
port=3306
protocol=MySQLBackend
serv_weight=1

[server2]
type=server
address=172.16.8.57
port=3306
protocol=MySQLBackend
serv_weight=3

[server3]
type=server
address=172.16.8.58
port=3306
protocol=MySQLBackend
serv_weight=3


# Monitor for the servers
#
# This will keep MaxScale aware of the state of the servers.
# MySQL Monitor documentation:
# //github.com/mariadb-corporation/MaxScale/blob/2.1/Documentation/Monitors/MySQL-Monitor.md
#MariaDB状态监控
[MySQL Monitor]
type=monitor
module=mysqlmon
servers=server1,server2,server3
user=jiankong
passwd=jiankong123
monitor_interval=10000
detect_stale_master=true #即使从全挂掉,保证主担任读写

# Service definitions
#
# Service Definition for a read-only service and
# a read/write splitting service.
#

# ReadConnRoute documentation:
# //github.com/mariadb-corporation/MaxScale/blob/2.1/Documentation/Routers/ReadConnRoute.md
#读
[Read-Only Service]
type=service
router=readconnroute
servers=server1,server2,server3
user=jiankong
passwd=jiankong123
router_options=slave
enable_root_user=1 #允许root用户登录执行
weightby=serv_weight #主从权重

# ReadWriteSplit documentation:
# //github.com/mariadb-corporation/MaxScale/blob/2.1/Documentation/Routers/ReadWriteSplit.md
#写
[Read-Write Service]
type=service
router=readwritesplit
servers=server1,server2,server3
user=jiankong
passwd=jiankong123
max_slave_connections=100%
use_sql_variables_in=master #保证会话的一致性
enable_root_user=1 #允许root登录
max_slave_replication_lag=3600 #允许从超出主的同步时间,超出则不路由

# This service enables the use of the MaxAdmin interface
# MaxScale administration guide:
# //github.com/mariadb-corporation/MaxScale/blob/2.1/Documentation/Reference/MaxAdmin.md

[MaxAdmin Service]
type=service
router=cli

# Listener definitions for the services
#
# These listeners represent the ports the
# services will listen on.
#

[Read-Only Listener]
type=listener
service=Read-Only Service
protocol=MySQLClient
port=4008

[Read-Write Listener]
type=listener
service=Read-Write Service
protocol=MySQLClient
port=4006

[MaxAdmin Listener]
type=listener
service=MaxAdmin Service
protocol=maxscaled
socket=default

保存并退出。
8.下面创建启动脚本

[root@localhost ~]# cp /usr/local/maxscale-2.1.3.centos.7/share/maxscale.service /usr/lib/systemd/system/
[root@localhost ~]# vim /usr/lib/systemd/system/maxscale.service

9.修改maxscale.service中的ExecStart=///bin/maxscale为ExecStart=/usr/local/maxscale/bin/maxscale

[root@localhost ~]# chmod 755 /usr/lib/systemd/system/maxscale.service
[root@localhost ~]# systemctl enable maxscale
[root@localhost ~]# systemctl daemon-reload
[root@localhost ~]# systemctl start maxscale

10.添加变量值

[root@localhost ~]# vi /etc/profile //最后一行添加以下内容保存退出!

PATH=$PATH:/usr/local/maxscale/bin
export PATH

[root@localhost ~]# source /etc/profile //使其变量立即生效

11.接下来就可以使用MaxAdmin进行管理。MaxAdmin是一个简单的客户端管理界面,可用于与MariaDB MaxScale服务器进行交互,可以显示MariaDB MaxScale内部的统计信息状态以及对MariaDB MaxScale操作的控制。详情:
//mariadb.com/kb/en/mariadb-enterprise/maxadmin-admin-interface/

[root@localhost ~]# maxadmin //回车
MaxScale> list servers
Servers.
---------------+--------------+-------+-------------+-----------------
Server | Address | Port | Connections | Status 
---------------+--------------+-------+-------------+-----------------
server1 | 172.16.8.56 | 3306 | 0 | Master, Running
server2 | 172.16.8.57 | 3306 | 0 | Slave, Running
server2 | 172.16.8.58 | 3306 | 0 | Slave, Running
---------------+--------------+-------+-------------+-----------------

12.至此MaxScale已经配置完成。现在就可以使用客户端连接Maxscale服务器端 端口为4006。