Linux系统运维之MYSQL数据库集群部署(主主互备)
一、介绍
既然是部署MYSQL高可用集群环境，就要介绍下MYSQL Replication，MYSQL Replication是MYSQL自带的一个主从复制功能，也就是一台MYSQL服务器向另外一台MYSQL服务器上复制日志，然后进行日志解析并应用到自身的一个过程。同时MYSQL Replication是单向、异步复制的。
基于单向复制的技术特点如下：
- 增加了MYSQL应用的健壮性，如果Matser端出现问题，那么可以随时切换到Slave端继续提高服务；
- 在同一个网络中，业务量不是非常大的情况下，Slave端同步数据很快，基本上可以保障与Master端的实时同步，且同步过程中不会造成Master端的正常工作；
- 可以将MYSQL读、写分离开，写操作只在Master端进行，而读操作可以在一个或多个Slave端完成，由于Master和Slave是保持数据同步的，这样在保证不影响业务连续性的同时，又降低了单台MYSQL服务器的负载。
MYSQL Replication支持多类型复制方式：
- 基于SQL模式：MYSQL默认采用基于SQL语句的复制方式，这样效率较高；工作原理：在Master端执行SQL语句，在Slave端再次执行同样的语句；
- 基于行模式：直接将Master端改变的内容复制到Slave端；
- 混合模式：先基于SQL模式进行SQL语句的复制，当无法精准复制时，再基于行模式进行内容上的复制；
二、拓扑图
三、配置环境
服务器地址及软件版本信息如下：
将主机名、IP对应关系写入到/etc/hosts文件中：
[root@UIPLUSt-MSDB02 ~]# echo '192.168.0.191 UIPLUSt-MSDB01' >> /etc/hosts
[root@UIPLUSt-MSDB02 ~]# echo '192.168.0.192 UIPLUSt-MSDB02' >> /etc/hosts
[root@UIPLUSt-MSDB01 ~]# echo '192.168.0.191 UIPLUSt-MSDB01' >> /etc/hosts
[root@UIPLUSt-MSDB01 ~]# echo '192.168.0.192 UIPLUSt-MSDB02' >> /etc/hosts
安装Mysql数据库，这里用yum安装，建议生成环境选用源码安装：
[root@UIPLUSt-MSDB01 ~]# yum install httpd php mysql mysql-server php-mysql -y
---------------------------------------
Transaction Summary
==================================================================================================================================================================================================================
Install 15 Package(s)
Upgrade 1 Package(s) Total download size: 17 M
Downloading Packages:
(1/16): apr-1.3.9-5.el6_2.x86_64.rpm | 123 kB 00:00
(2/16): apr-util-1.3.9-3.el6_0.1.x86_64.rpm | 87 kB 00:00
(3/16): apr-util-ldap-1.3.9-3.el6_0.1.x86_64.rpm | 15 kB 00:00
(4/16): httpd-2.2.15-59.el6.centos.x86_64.rpm | 834 kB 00:00
(5/16): httpd-tools-2.2.15-59.el6.centos.x86_64.rpm | 79 kB 00:00
(6/16): mailcap-2.1.31-2.el6.noarch.rpm | 27 kB 00:00
(7/16): mysql-5.1.73-8.el6_8.x86_64.rpm | 895 kB 00:02
(8/16): mysql-libs-5.1.73-8.el6_8.x86_64.rpm | 1.2 MB 00:03
(9/16): mysql-server-5.1.73-8.el6_8.x86_64.rpm | 8.6 MB 00:32
(10/16): perl-DBD-MySQL-4.013-3.el6.x86_64.rpm | 134 kB 00:00
(11/16): perl-DBI-1.609-4.el6.x86_64.rpm | 705 kB 00:02
(12/16): php-5.3.3-49.el6.x86_64.rpm | 1.1 MB 00:02
(13/16): php-cli-5.3.3-49.el6.x86_64.rpm | 2.2 MB 00:05
(14/16): php-common-5.3.3-49.el6.x86_64.rpm | 530 kB 00:00
(15/16): php-mysql-5.3.3-49.el6.x86_64.rpm | 86 kB 00:00
(16/16): php-pdo-5.3.3-49.el6.x86_64.rpm | 80 kB 00:00
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 329 kB/s | 17 MB 00:51 Installed:
httpd.x86_64 0:2.2.15-59.el6.centos mysql.x86_64 0:5.1.73-8.el6_8 mysql-server.x86_64 0:5.1.73-8.el6_8 php.x86_64 0:5.3.3-49.el6 php-mysql.x86_64 0:5.3.3-49.el6 Dependency Installed:
apr.x86_64 0:1.3.9-5.el6_2 apr-util.x86_64 0:1.3.9-3.el6_0.1 apr-util-ldap.x86_64 0:1.3.9-3.el6_0.1 httpd-tools.x86_64 0:2.2.15-59.el6.centos mailcap.noarch 0:2.1.31-2.el6
perl-DBD-MySQL.x86_64 0:4.013-3.el6 perl-DBI.x86_64 0:1.609-4.el6 php-cli.x86_64 0:5.3.3-49.el6 php-common.x86_64 0:5.3.3-49.el6 php-pdo.x86_64 0:5.3.3-49.el6 Dependency Updated:
mysql-libs.x86_64 0:5.1.73-8.el6_8 Complete!
[root@UIPLUSt-MSDB02 ~]# yum install httpd php mysql mysql-server php-mysql -y
---------------------------------------
Transaction Summary
==================================================================================================================================================================================================================
Install 15 Package(s)
Upgrade 1 Package(s) Total download size: 17 M
Downloading Packages:
(1/16): apr-1.3.9-5.el6_2.x86_64.rpm | 123 kB 00:00
(2/16): apr-util-1.3.9-3.el6_0.1.x86_64.rpm | 87 kB 00:00
(3/16): apr-util-ldap-1.3.9-3.el6_0.1.x86_64.rpm | 15 kB 00:00
(4/16): httpd-2.2.15-59.el6.centos.x86_64.rpm | 834 kB 00:00
(5/16): httpd-tools-2.2.15-59.el6.centos.x86_64.rpm | 79 kB 00:00
(6/16): mailcap-2.1.31-2.el6.noarch.rpm | 27 kB 00:00
(7/16): mysql-5.1.73-8.el6_8.x86_64.rpm | 895 kB 00:02
(8/16): mysql-libs-5.1.73-8.el6_8.x86_64.rpm | 1.2 MB 00:03
(9/16): mysql-server-5.1.73-8.el6_8.x86_64.rpm | 8.6 MB 00:32
(10/16): perl-DBD-MySQL-4.013-3.el6.x86_64.rpm | 134 kB 00:00
(11/16): perl-DBI-1.609-4.el6.x86_64.rpm | 705 kB 00:02
(12/16): php-5.3.3-49.el6.x86_64.rpm | 1.1 MB 00:02
(13/16): php-cli-5.3.3-49.el6.x86_64.rpm | 2.2 MB 00:05
(14/16): php-common-5.3.3-49.el6.x86_64.rpm | 530 kB 00:00
(15/16): php-mysql-5.3.3-49.el6.x86_64.rpm | 86 kB 00:00
(16/16): php-pdo-5.3.3-49.el6.x86_64.rpm | 80 kB 00:00
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 329 kB/s | 17 MB 00:51 Installed:
httpd.x86_64 0:2.2.15-59.el6.centos mysql.x86_64 0:5.1.73-8.el6_8 mysql-server.x86_64 0:5.1.73-8.el6_8 php.x86_64 0:5.3.3-49.el6 php-mysql.x86_64 0:5.3.3-49.el6 Dependency Installed:
apr.x86_64 0:1.3.9-5.el6_2 apr-util.x86_64 0:1.3.9-3.el6_0.1 apr-util-ldap.x86_64 0:1.3.9-3.el6_0.1 httpd-tools.x86_64 0:2.2.15-59.el6.centos mailcap.noarch 0:2.1.31-2.el6
perl-DBD-MySQL.x86_64 0:4.013-3.el6 perl-DBI.x86_64 0:1.609-4.el6 php-cli.x86_64 0:5.3.3-49.el6 php-common.x86_64 0:5.3.3-49.el6 php-pdo.x86_64 0:5.3.3-49.el6 Dependency Updated:
mysql-libs.x86_64 0:5.1.73-8.el6_8 Complete!
启动数据库服务：
[root@UIPLUSt-MSDB01 ~]# /etc/init.d/mysqld restart
Stopping mysqld: [ OK ]
Initializing MySQL database: Installing MySQL system tables...
OK
Filling help tables...
OK To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands: /usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin -u root -h UIPLUSt-MSDB01 password 'new-password' Alternatively you can run:
/usr/bin/mysql_secure_installation which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers. See the manual for more instructions. You can start the MySQL daemon with:
cd /usr ; /usr/bin/mysqld_safe & You can test the MySQL daemon with mysql-test-run.pl
cd /usr/mysql-test ; perl mysql-test-run.pl Please report any problems with the /usr/bin/mysqlbug script! [ OK ]
Starting mysqld: [ OK ]
根据提示，配置数据库密码以及访问权限：
[root@UIPLUSt-MSDB01 ~]# /usr/bin/mysqladmin -u root password 'mysqldb'
[root@UIPLUSt-MSDB01 ~]# /usr/bin/mysqladmin -u root -h192.168.0.191 password 'mysqldb' ---------------------------------------------------------------------------
[root@UIPLUSt-MSDB02 ~]# /usr/bin/mysqladmin -u root password 'mysqldb'
[root@UIPLUSt-MSDB02 ~]# /usr/bin/mysqladmin -u root -h192.168.0.192 password 'mysqldb'
验证账号密码，登录mysql：
[root@UIPLUSt-MSDB01 ~]# mysql -uroot -pmysqldb
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| test |
+--------------------+
3 rows in set (0.00 sec) mysql>
四、配置主从同步
修改MySQL配置文件，在/etc/my.cnf配置文件中“[mysqld]”段落后，配置如下内容：
[root@UIPLUSt-MSDB01 etc]# vim my.cnf
server-id=1
log-bin=mysql-bin
relay-log=mysql-relay-bin
replicate-wild-ignore-table=mysql.%
replicate-wild-ignore-table=test.%
replicate-wild-ignore-table=information_schema.%
log-slave-updates [root@UIPLUSt-MSDB02 etc]# vim my.cnf
server-id=2
log-bin=mysql-bin
relay-log=mysql-relay-bin
replicate-wild-ignore-table=mysql.%
replicate-wild-ignore-table=test.%
replicate-wild-ignore-table=information_schema.%
log-slave-updates
- server-id : 节点标识，主、从节点不能相同，必须是全局唯一；
- log-bin：开启MySQLde binlog日志功能，‘mysql-bin’为日志文件格式；
- relay-log：定义relay-log日志文件格式；
- replicate-wild-ignore-table：复制过滤，过滤不需要复制的数据库；
- replicate_wild_do_table：复制过滤，与上面相反，过滤需要复制的数据库；
- log-slave-updates：将更新记录写入二进制文件，以便从进行复制；
- slave-skip-errors：不要乱使用这个跳过错误的参数，除非你知道自己在做什么，当使用这个参数时候，MYSQL会忽略那些错误，这样会导致主从服务器数据不一致；
- 注意：不要在主库上使用binlog-do-db或者binlog-ignore-db选项，也不要在从库上使用replicate-do-db或者replicate-ignore-db选项，这样会造成夸库更新失败；推荐在从库上使用replicate_wild_do_table和replicate-wild-ignore-table选项来解决复制过滤问题。
配置完以上配置，如果主数据库有数据，需要登录数据库进行手动同步操作：
[root@UIPLUSt-MSDB01 etc]# mysql -uroot -pmysqldb
mysql> use mysql；
mysql> flush tables with read lock;
Query OK, 3 rows affected (0.01 sec) #注：这里不要退出终端，从新打开终端进行mysqldump备份数据
[root@UIPLUSt-MSDB01 ~]# mysqldump -uroot -pmysqldb --events --ignore-table=mysql.events mysql > mysql.sql
[root@UIPLUSt-MSDB01 ~]# ls
anaconda-ks.cfg install.log install.log.syslog mysql.sql
将数据导入到MSDB02数据库上，依次重启MySQL服务：
[root@UIPLUSt-MSDB02 ~]# mysql -uroot -pmysqldb < mysql.sql
[root@UIPLUSt-MSDB01 etc]# /etc/init.d/mysqld restart
Stopping mysqld: [ OK ]
Starting mysqld: [ OK ]
[root@UIPLUSt-MSDB02 etc]# /etc/init.d/mysqld restart
Stopping mysqld: [ OK ]
Starting mysqld: [ OK ]
依次登录MSDB01，MSDB02，进行创建复制用户并授权操作:
[root@UIPLUSt-MSDB01 etc]# mysql -uroot -pmysqldb
mysql> grant replication slave on *.* to 'repl'@'192.168.0.192' identified by 'replpwd';
Query OK, 0 rows affected (0.00 sec) mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 261 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
=================================================
[root@UIPLUSt-MSDB02 ~]# mysql -uroot -pmysqldb
mysql> change master to master_host='192.168.0.191',master_user='repl',master_password='replpwd',master_log_file='mysql-bin.000002',master_log_pos=106;
Query OK, 0 rows affected (0.08 sec) mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
查询Slave状态，确认主从配置：
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.191
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 261
Relay_Log_File: mysql-relay-bin.000004
Relay_Log_Pos: 406
Relay_Master_Log_File: mysql-bin.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table: mysql.%,test.%,information_schema.%
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 261
Relay_Log_Space: 561
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
1 row in set (0.00 sec
以上，从MSDB01到MSDB02的主从复制配置完成；下面配置MSDB02到MSDB01的主从复制：
[root@UIPLUSt-MSDB02 ~]# mysql -uroot -pmysqldb
mysql> grant replication slave on *.* to 'repl'@'192.168.0.191' identified by 'replpwd';
Query OK, 0 rows affected (0.00 sec) mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 | 261 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec) ====================================================
[root@UIPLUSt-MSDB01 etc]# mysql -uroot -pmysqldb
mysql> change master to master_host='192.168.0.192',master_user='repl',master_password='replpwd',master_log_file='mysql-bin.000003',master_log_pos=106;
Query OK, 0 rows affected (0.05 sec) mysql> start slave;
Query OK, 0 rows affected (0.00 sec) mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.192
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 261
Relay_Log_File: mysql-relay-bin.000002
Relay_Log_Pos: 406
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table: mysql.%,test.%,information_schema.%
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 261
Relay_Log_Space: 561
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
1 row in set (0.00 sec)
至此，MYSQL双主模式的主从复制配置完成。
五、配置Keepalived实现双主高可用
关于Keepalived:
Keepalived最初是为LVS设计，监控集群系统中各个服务节点的状态；根据TCP/IP参考模型的第三、第四和第五层交换机制检测节点的状态，如果服务节点出现异常，宕机等，Keepalived将检测到，并将有异常的节点从集群系统中摘除；而在异常节点恢复后， 从新添加到集群中，这些操作都是自 动化，无需人工干预。
Keepalived后来又加入了VRRP(虚拟路由冗余协议)功能，目的是解决静态路由出现的单节点故障；通过VRRP可以实现网络不间断稳定运行，因此Keepalived具备服务器状态检测和故障隔离能力，同时又具备HA cluster功能。
下载安装Keepalived：
[root@UIPLUSt-MSDB02 ~]# cd /opt/ && wget http://www.keepalived.org/software/keepalived-1.3.5.tar.gz
[root@UIPLUSt-MSDB02 opt]# cd keepalived-1.3.5
[root@UIPLUSt-MSDB02 ~]# yum install gcc openssl-devel kernel-devel popt-devel ipvsadm -y
[root@UIPLUSt-MSDB02 keepalived-1.3.5]# ./configure --sysconf=/etc --with-kernel-dir=/usr/src/kernels/2.6.32-504.el6.x86_64
------------------------------------------------------------------------
Keepalived configuration
------------------------
Keepalived version : 1.3.5
Compiler : gcc
Preprocessor flags : -I/usr/src/kernels/2.6.32-504.el6.x86_64/include
Compiler flags : -Wall -Wunused -Wstrict-prototypes -Wextra -g -O2
Linker flags :
Extra Lib : -lcrypto -lssl
Use IPVS Framework : Yes
IPVS use libnl : No
IPVS syncd attributes : No
IPVS 64 bit stats : No
fwmark socket support : Yes
Use VRRP Framework : Yes
Use VRRP VMAC : Yes
Use VRRP authentication : Yes
With ip rules/routes : Yes
------------------------------------------------------------------------
[root@UIPLUSt-MSDB02 keepalived-1.3.5]# make && make install
[root@UIPLUSt-MSDB02 keepalived-1.3.5]# ln -s /usr/local/sbin/keepalived /sbin/
[root@UIPLUSt-MSDB02 keepalived-1.3.5]# cp keepalived/etc/init.d/keepalived /etc/init.d/
[root@UIPLUSt-MSDB02 keepalived-1.3.5]# chkconfig --add keepalived
[root@UIPLUSt-MSDB02 keepalived-1.3.5]# chkconfig keepalived on
配置/etc/keepalived/keepalived.conf文件：
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_script check_mysqld {
script "/ect/keepalived/mysqlcheck/check_slave.sh 127.0.0.1"
interval 2
weight 21
}
vrrp_instance HA_1 {
state BACKUP
interface eth2
virtual_router_id 80
priority 100
advert_int 2
nopreempt
authentication {
auth_type PASS
auth_pass qweasdzxc
}
track_script {
check_mysqld
}
virtual_ipaddress {
192.168.0.193/24 dev eth2
}
}
关于/ect/keepalived/mysqlcheck/check_slave.sh脚本：
#!/bin/bash
export HOST_IP=$1
export HOST_PORT=3306
export IP=`ifconfig | grep Ethernet -A1 | grep -v Link | awk -F[' ':]+ '{print $4}'`
MYUSER=root
MYPASS="mysqldb"
MYSQL_PATH=/usr/bin/
MYSQL_CMD="$MYSQL_PATH/mysql -u$MYUSER -p$MYPASS" MailTitle=""
time1=`date +"%Y%m%d%H%M%S"`
time2=`date +"%Y-%m-%d %H:%M:%S"`
SlaveStatusFile="/tmp/slave_status_${HOST_PORT}.${time1}.log"
echo "------------------Begins at :"$time2 > $SlaveStatusFile
echo "" >> $SlaveStatusFile #get slave status
$MYSQL_CMD -e "show slave status\G" >> $SlaveStatusFile
#get io_thread_status, sql_thread_status
SlaveStatus=($($MYSQL_CMD -e "show slave status\G" | egrep "_Running"|awk '{print $NF}'))
echo "" >> $SlaveStatusFile if [ "${SlaveStatus[0]}" = "No" ] || [ "${SlaveStatus[1]}" = "No" ]
then
echo "Slave $IP $HOST_PORT is down !" >> $SlaveStatusFile
MailTitle="[ERROR] Slave replication is down on $IP $HOST_PORT !"
fi if [ -n "$MailTitle" ]
then
/etc/init.d/keepalived stop
fi
check_slave.sh
至此，分别启动MSDB01和MSDB02上额Keepalived服务，然后查看VIP是否在MSDB01上：
[root@UIPLUSt-MSDB01 keepalived]# /etc/init.d/keepalived start
Starting keepalived: [ OK ]
[root@UIPLUSt-MSDB02 keepalived]# /etc/init.d/keepalived start
Starting keepalived: [ OK ]
[root@UIPLUSt-MSDB01 keepalived]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:c0:2b:82 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.191/24 brd 192.168.0.255 scope global eth2
inet 192.168.0.193/24 scope global secondary eth2
inet6 fe80::20c:29ff:fec0:2b82/64 scope link
valid_lft forever preferred_lft forever
六、测试
Linux系统运维之MYSQL数据库集群部署(主主互备)的更多相关文章
- Linux系统运维相关的面试题 （问答题）
这里给大家整理了一些Linux系统运维相关的面试题,有些问题没有标准答案,希望要去参加Linux运维面试的朋友,可以先思考下这些问题. 一.Linux操作系统知识 1.常见的Linux发行版本都有 ...
- Linux系统运维笔记(五),CentOS 6.4安装java程序
Linux系统运维笔记(五),CentOS 6.4安装java程序 用eclipse编译通的java程序,现需要实施到服务器.实施步骤: 一,导出程序成jar包. 1,在主类编辑界面点右健,选 ru ...
- Linux系统运维笔记(四),CentOS 6.4安装Nginx
Linux系统运维笔记(四),CentOS 6.4安装Nginx 1,安装编译工具及库文件 yum -y install make zlib zlib-devel gcc-c++ libtool op ...
- Linux系统运维笔记(四),CentOS 6.4安装 MongoDB
Linux系统运维笔记(四),CentOS 6.4安装 MongoDB 1,下载 https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.0.6 ...
- Linux系统运维笔记(三),设置IP和DNS
Linux系统运维笔记(三),设置IP和DNS 手工配置静态的IP地址 也就是手工配置IP地址.子网掩码.网关和DNS. vi /etc/sysconfig/network-scripts/ifcfg ...
- Linux系统运维笔记(二),Linux文件编辑命令
Linux系统运维笔记 Linux文件编辑命令 首先我们使用命令 vi filename 打开一个文件,这个时候进入到的是命令模式 接下来我们按i,然后键盘随便输入写内容. 然后按ESC重新进入到命令 ...
- Linux系统运维笔记(一),查看系统版本和设置系统时间
Linux系统运维笔记 查看系统版本和设置系统时间 查看系统版本 lsb_release -a (适用于所有的linux,包括Redhat.SuSE.Debian等发行版,但是在debian下要安装l ...
- Linux系统运维笔记(6),CentOS 7.6双网卡路由配置
Linux系统运维笔记(6),CentOS 7.6双网卡路由配置. 一,先确认系统版本: [root@localhost ~]# cat /etc/redhat-releaseCentOS Linux ...
- 7.学完linux系统运维到底可以做什么？
linux运维到底可以做什么?(略有改动原文.排版) 运维,很容易从字面理解为运营.维护. 很多朋友认为,在互联网公司中linux系统运维的工作就是安装系统,部署服务.处理紧急故障,为公司里的开发人员 ...
- Linux系统下安装Redis和Redis集群配置
Linux系统下安装Redis和Redis集群配置 一. 下载.安装.配置环境: 1.1.>官网下载地址: https://redis.io/download (本人下载的是3.2.8版本:re ...
随机推荐
- idea的上git的拉取推送
下载好idea和git idea的下载破解查看https://www.cnblogs.com/badfisher/p/14709120.html git官网要求下载即可. 获取仓库路径点击复制. 在i ...
- SQL concat_ws, collect_set, 和explode合并使用
1. 背景 有一个这样的数据集:字段和字段的值是两列 目的是将这个数据转换成规整的一个特征是一列的数据: 2. 做法 第一步:先造出列 select ucid ,CASE WHEN type ='性别 ...
- 随手记：linux校准时间
记录一下校准时间操作的执行步骤: 首先使用 date 查看当前时间是否准确 校准时间命令 ntpdate cn.pool.ntp.org 如果没有权限: sudo -i 会出现输入密码,直接输入密码即 ...
- ASP.NET Core设置URLs的几种方法，完美解决.NET 6项目局域网IP地址远程无法访问的问题
近期在dotnet项目中遇到这样的问题:.net6 运行以后无法通过局域网IP地址远程访问.后查阅官方文档.整理出解决问题的五种方式方法,通过新建一个新的WebApi项目演示如下: 说明 操作系统:U ...
- 【Qt6】QWindow类可以做什么
原来的水文标题是"用 VS Code 搞 Qt6",想想还是直接改为"Qt6",反正这个用不用 VS Code 也能搞.虽然我知道大伙伴们都很讨厌 CMake, ...
- 【OpenAI】私有框架代码生成实践
作者:京东零售 牛晓光 根据现有调研和实践,由OpenAI提供的ChatGPT/GPT-4模型和CodeX模型能够很好的理解和生成业界大多数编程语言的逻辑和代码,其中尤其擅长Python.JavaSc ...
- 使用 MRKL 系统跨越神经符号鸿沟
本文展示了自然语言处理的下一步发展--模块化推理.知识和语言( the Modular Reasoning, Knowledge and Language,简称为MRKL)系统以及LangChain和 ...
- Djnago常用命令
pip: bundle,创建包含多个包的pybundles:freeze,显示所有已安装的包:help,显示可用命令:install,安装包:search,搜索PyPi:uninstall,卸载包:u ...
- Javascript 常见的循环方式总结
本文地址: https://www.cnblogs.com/zichliang/p/17412968.html 在Javascript中有很多种循环方式.有多种循环方式可以用来遍历数组.对象.以及执行 ...
- 修改本地hosts
本地hosts文件地址 C:\Windows\System32\drivers\etc 修改前 修改后 可以使用记事本打开hosts文件或使用Notepad++ 工具打开 按图示添加,修改即可