Ubuntu系统中安装配置OpenStack平台

作者：koglum | 来源：互联网 | 2014-05-27 20:14

注意：近期开始向OpenStack进军，请大家继续关注。也希望各位提出批评和改进意见，弥补我的不足。对于OpenStack我是个新手，一来以前都飘在CentOS中，这次对于拿Ubuntu做Server还有点不适应；二来OpenStack绝对是个BigGuy，构建复杂，内容庞大，仅仅安装就

注意：

近期开始向OpenStack进军，请大家继续关注。也希望各位提出批评和改进意见，弥补我的不足。对于OpenStack我是个新手，一来以前都飘在CentOS中，这次对于拿Ubuntu做Server还有点不适应；二来OpenStack绝对是个Big Guy，构建复杂，内容庞大，仅仅安装就很麻烦。同时它又非常灵活，经常让我云里雾里。

昨天对照着最新的官方教程进行了安装，结果OK，用Server2制作Ubuntu Desktop和Win7上传后，都能正常打开，但每个instance都没有网卡，让人觉得奇怪。后来感觉还是没有把官方教程吃透的原因。晚上开始挑灯夜战，自己开始翻译官方教程。我认为只有踏踏实实地学习，才能真正搞懂它。

以下是官方教程原链接处：

以下是我对照原教程翻译的博客文章《OpenStack云计算----快速入门之》章节：

从这里开始，是部分的安装手记，请参考官方教程参看下面的过程。

一、安装Ubuntu

1、DVD：Ubuntu 12.04 Server版

2、分区：

490G的主分区 + 16G的SWAP（其实还能减少，服务器16G内存） + 490G空闲空间

注：490G的空闲空间用于OpenStack的Swift数据存储。同时一定要给主分区格式化，并且将boot写入。

3、安装语言，选择“English”，因为汉化不太好，尤其是到Openstack后，故直接选择英语，避免各种乱码方块出现

4、不适用代理服务器，因为本身就已经有外网IP，自身就可以连入Internet

5、选择“不使用自动更新 No auto Update”

6、只安装OpenSSH服务。

7、等待安装结束。重启，进入第二阶段。

二、安装OpenStack

1、使用putty，远程连接：

localadmin@122.xxx.144.xxx's password:

Welcome to Ubuntu 12.04 LTS (GNU/Linux 3.2.0-23-generic x86_64)

* Documentation: https://help.ubuntu.com/

System information as of Wed Jul 4 15:13:59 CST 2012

System load: 0.0 Processes: 109

Usage of /: 1.7% of 458.53GB Users logged in: 1

Memory usage: 0% IP address for eth0: 122.204.144.220

Swap usage: 0%

Graph this data and manage this system at https://landscape.canonical.com/

58 packages can be updated.

29 updates are security updates.

The programs included with the Ubuntu system are free software;

the exact distribution terms for each program are described in the

individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by

applicable law.

Last login: Wed Jul 4 15:08:33 2012

localadmin@server1:~$

2、现在更新系统：

localadmin@server1:~$sudo apt-get update

localadmin@server1:~$sudo apt-get upgrade

3、编辑网卡：

localadmin@server1:~$ cat /etc/network/interfaces

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).

# The loopback network interface

auto lo

iface lo inet loopback

# The primary network interface

auto eth0

iface eth0 inet static

address 122.204.144.220

netmask 255.255.255.128

broadcast 122.204.144.255

gateway 122.204.144.129

dns-nameservers 218.104.111.114

auto eth1

iface eth1 inet static

address 192.168.3.1

netmask 255.255.255.0

network 192.168.3.0

broadcast 192.168.3.255

localadmin@server1:~$

4、重启network网络服务：

localadmin@server1:~$ sudo /etc/init.d/networking restart

* Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces

* Reconfiguring network interfaces... ssh stop/waiting

ssh start/running, process 11988

ssh stop/waiting

ssh start/running, process 12029

[ OK ]

localadmin@server1:~$

5、NTP是用来使系统和一个精确的时间源保持时间同步的协议。建议大家在自己管理的网络中建立至少一台时间服务器来同步本地时间，这样可以使得在不同的系统上处理和收集日志和管理更加容易。

建立NTP时间服务器：

localadmin@server1:~$ sudo apt-get install ntp

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following extra packages will be installed:

libcap2 libopts25

Suggested packages:

ntp-doc

The following NEW packages will be installed:

libcap2 libopts25 ntp

0 upgraded, 3 newly installed, 0 to remove and 3 not upgraded.

Need to get 684 kB of archives.

After this operation, 1,765 kB of additional disk space will be used.

Do you want to continue [Y/n]? y

Get:1 http://us.archive.ubuntu.com/ubuntu/ precise/main libcap2 amd64 1:2.22-1ubuntu3 [12.0 kB]

Get:2 http://us.archive.ubuntu.com/ubuntu/ precise/main libopts25 amd64 1:5.12-0.1ubuntu1 [59.9 kB]

Get:3 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main ntp amd64 1:4.2.6.p3+dfsg-1ubuntu3.1 [612 kB]

Fetched 684 kB in 5s (137 kB/s)

Selecting previously unselected package libcap2.

(Reading database ... 48908 files and directories currently installed.)

Unpacking libcap2 (from .../libcap2_1%3a2.22-1ubuntu3_amd64.deb) ...

Selecting previously unselected package libopts25.

Unpacking libopts25 (from .../libopts25_1%3a5.12-0.1ubuntu1_amd64.deb) ...

Selecting previously unselected package ntp.

Unpacking ntp (from .../ntp_1%3a4.2.6.p3+dfsg-1ubuntu3.1_amd64.deb) ...

Processing triggers for ureadahead ...

Processing triggers for man-db ...

Setting up libcap2 (1:2.22-1ubuntu3) ...

Setting up libopts25 (1:5.12-0.1ubuntu1) ...

Setting up ntp (1:4.2.6.p3+dfsg-1ubuntu3.1) ...

* Starting NTP server ntpd [ OK ]

Processing triggers for libc-bin ...

ldconfig deferred processing now taking place

6、修改NTP服务器配置文件：

localadmin@server1:~$ sudo vi /etc/ntp.conf

localadmin@server1:~$ cat /etc/ntp.conf

# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help

driftfile /var/lib/ntp/ntp.drift

# Enable this if you want statistics to be logged.

#statsdir /var/log/ntpstats/

statistics loopstats peerstats clockstats

filegen loopstats file loopstats type day enable

filegen peerstats file peerstats type day enable

filegen clockstats file clockstats type day enable

# Specify one or more NTP servers.

# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board

# on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for

# more information.

server 0.ubuntu.pool.ntp.org

server 1.ubuntu.pool.ntp.org

server 2.ubuntu.pool.ntp.org

server 3.ubuntu.pool.ntp.org

# Use Ubuntu's ntp server as a fallback.

server ntp.ubuntu.com

server 127.127.1.0

fudge 127.127.1.0

# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for

# details. The web page

# might also be helpful.

# Note that "restrict" applies to both servers and clients, so a configuration

# that might be intended to block requests from certain clients could also end

# up blocking replies from your own upstream servers.

# By default, exchange time with everybody, but don't allow configuration.

restrict -4 default kod notrap nomodify nopeer noquery

restrict -6 default kod notrap nomodify nopeer noquery

# Local users may interrogate the ntp server more closely.

restrict 127.0.0.1

restrict ::1

# Clients from this (example!) subnet have unlimited access, but only if

# cryptographically authenticated.

#restrict 192.168.123.0 mask 255.255.255.0 notrust

# If you want to provide time to your local subnet, change the next line.

# (Again, the address is an example only.)

#broadcast 192.168.123.255

# If you want to listen to time broadcasts on your local subnet, de-comment the

# next lines. Please do this only if you trust everybody on the network!

#disable auth

#broadcastclient

localadmin@server1:~$

7、重启NTP服务：

localadmin@server1:~$ sudo service ntp restart

* Stopping NTP server ntpd [ OK ]

* Starting NTP server ntpd [ OK ]

localadmin@server1:~$

8、安装mysql-server：

localadmin@server1:~$ sudo apt-get install mysql-server python-mysqldb

在接下来的root密码确认中，本例输入了两次“123456”

然后修改mysql的bind-address，将其改成0.0.0.0，并重启mysql服务。

localadmin@server1:~$ sudo vi /etc/mysql/my.cnf

localadmin@server1:~$ sodo service mysql restart

****************************** keystone *************************************

localadmin@server1:~$ sudo vi /etc/keystone/keystone.conf

localadmin@server1:~$ sudo service keystone restart

keystone stop/waiting

keystone start/running, process 15711

localadmin@server1:~$ sudo keystone-manage db_sync

localadmin@server1:~$ export SERVICE_ENDPOINT="http://localhost:35357/v2.0"

localadmin@server1:~$ export SERVICE_TOKEN=admin

localadmin@server1:~$ keystone tenant-create --name admin

+-------------+----------------------------------+

| Property | Value |

+-------------+----------------------------------+

| description | None |

| enabled | True |

| id | eedbbd34067f46e6a47122301f5a9ee9 |

| name | admin |

+-------------+----------------------------------+

localadmin@server1:~$ keystone tenant-create --name service

+-------------+----------------------------------+

| Property | Value |

+-------------+----------------------------------+

| description | None |

| enabled | True |

| id | a9b5e4cf02804dac8fb5ef9f2491533e |

| name | service |

+-------------+----------------------------------+

localadmin@server1:~$

localadmin@server1:~$ keystone user-create --name admin --pass admin --email admin@foobar.com

+----------+-------------------------------------------------------------------------------------------------------------------------+

| Property | Value |

+----------+-------------------------------------------------------------------------------------------------------------------------+

| email | admin@foobar.com |

| enabled | True |

| id | 09758dc348004bbcbe148a1dd9259b99 |

| name | admin |

| password | $6$rounds=40000$A5e8YUjukrp8dcou$iKKp0u7RTyVFxjF2sXcHcnf1M9YGP7UQV0u124ufTkL8f523VWtYWK08gOmLc0E4lPjWfJf2jgYrXpsQVm.kH. |

| tenantId | None |

+----------+-------------------------------------------------------------------------------------------------------------------------+

localadmin@server1:~$ keystone user-create --name nova --pass nova --email nova@foobar.com

+----------+-------------------------------------------------------------------------------------------------------------------------+

| Property | Value |

+----------+-------------------------------------------------------------------------------------------------------------------------+

| email | nova@foobar.com |

| enabled | True |

| id | 5a9b32098688403fa6db76b1b66d282c |

| name | nova |

| password | $6$rounds=40000$oKfHA5oymDisoNGD$j1jSERMHOtwHij2C5S4otDwdnox0opHiVOBUwBF5RPNThxgXTFgqEgz80T5lvr4LIuO4oiSx1VCrMEtvIWcii1 |

| tenantId | None |

+----------+-------------------------------------------------------------------------------------------------------------------------+

localadmin@server1:~$ keystone user-create --name glance --pass glance --email glance@foobar.com

+----------+-------------------------------------------------------------------------------------------------------------------------+

| Property | Value |

+----------+-------------------------------------------------------------------------------------------------------------------------+

| email | glance@foobar.com |

| enabled | True |

| id | c525c1e363ec4ef6bcaf329bac378c9a |

| name | glance |

| password | $6$rounds=40000$ROLObYXKC8kSMmJ1$gQGNK3cNOvbo4Nekp48/COj.5cQitg1hTi3Ur9L.YClMShfC3aKnybVR/ybYZa3QiOCQSFYuggrW.u6lY/JB40 |

| tenantId | None |

+----------+-------------------------------------------------------------------------------------------------------------------------+

localadmin@server1:~$ keystone user-create --name swift --pass swift --email swift@foobar.com

+----------+-------------------------------------------------------------------------------------------------------------------------+

| Property | Value |

+----------+-------------------------------------------------------------------------------------------------------------------------+

| email | swift@foobar.com |

| enabled | True |

| id | de31da4c26ec4e32b1a0dddfd4242594 |

| name | swift |

| password | $6$rounds=40000$hC8rxm6qRaU29bCS$3u1Lby5iOmjt07lK.G.HZJh3Ab0Im3Yrfi/4n/p7OL7UAjIPLIDJtVclbHIVSlw7Ykv4lTo33ohUWkZ84rowE. |

| tenantId | None |

+----------+-------------------------------------------------------------------------------------------------------------------------+

localadmin@server1:~$

localadmin@server1:~$ keystone role-create --name admin

+----------+----------------------------------+

| Property | Value |

+----------+----------------------------------+

| id | eb150d45c71c459bba5515427f103e47 |

| name | admin |

+----------+----------------------------------+

localadmin@server1:~$ keystone role-create --name Member

+----------+----------------------------------+

| Property | Value |

+----------+----------------------------------+

| id | 9170bee284f14de1ad61e1b00f388636 |

| name | Member |

+----------+----------------------------------+

localadmin@server1:~$

localadmin@server1:~$ keystone tenant-list

+----------------------------------+---------+---------+

| id | name | enabled |

+----------------------------------+---------+---------+

| a9b5e4cf02804dac8fb5ef9f2491533e | service | True |

| eedbbd34067f46e6a47122301f5a9ee9 | admin | True |

+----------------------------------+---------+---------+

localadmin@server1:~$ keystone user-list

+----------------------------------+---------+-------------------+--------+

+----------------------------------+---------+-------------------+--------+

+----------------------------------+---------+-------------------+--------+

localadmin@server1:~$ keystone role-list

+----------------------------------+--------+

| id | name |

+----------------------------------+--------+

| 9170bee284f14de1ad61e1b00f388636 | Member |

| eb150d45c71c459bba5515427f103e47 | admin |

+----------------------------------+--------+

localadmin@server1:~$

localadmin@server1:~$ keystone user-role-add --user 09758dc348004bbcbe148a1dd9259b99 --role eb150d45c71c459bba5515427f103e47 --tenant_id eedbbd34067f46e6a47122301f5a9ee9

localadmin@server1:~$ keystone user-role-add --user 5a9b32098688403fa6db76b1b66d282c --role eb150d45c71c459bba5515427f103e47 --tenant_id a9b5e4cf02804dac8fb5ef9f2491533e

localadmin@server1:~$ keystone user-role-add --user c525c1e363ec4ef6bcaf329bac378c9a --role eb150d45c71c459bba5515427f103e47 --tenant_id a9b5e4cf02804dac8fb5ef9f2491533e

localadmin@server1:~$ keystone user-role-add --user de31da4c26ec4e32b1a0dddfd4242594 --role eb150d45c71c459bba5515427f103e47 --tenant_id a9b5e4cf02804dac8fb5ef9f2491533e

localadmin@server1:~$ keystone user-role-add --user 09758dc348004bbcbe148a1dd9259b99 --role 9170bee284f14de1ad61e1b00f388636 --tenant_id eedbbd34067f46e6a47122301f5a9ee9

localadmin@server1:~$ keystone service-create --name nova --type compute --description 'OpenStack Compute Service'

keystone service-create --name swift --type object-store --description 'OpenStack Storage Service'

keystone service-create --name keystone --type identity --description 'OpenStack Identity Service'

keystone service-create --name ec2 --type ec2 --description 'EC2 Service'+-------------+----------------------------------+

| Property | Value |

+-------------+----------------------------------+

| description | OpenStack Compute Service |

| id | 9585824540ef41389255dfd067e7f5c9 |

| name | nova |

| type | compute |

+-------------+----------------------------------+

localadmin@server1:~$ keystone service-create --name volume --type volume --description 'OpenStack Volume Service'

+-------------+----------------------------------+

| Property | Value |

+-------------+----------------------------------+

| description | OpenStack Volume Service |

| id | e80dacd3e70b470680964a2db26a2fc2 |

| name | volume |

| type | volume |

+-------------+----------------------------------+

localadmin@server1:~$ keystone service-create --name glance --type image --description 'OpenStack Image Service'

+-------------+----------------------------------+

| Property | Value |

+-------------+----------------------------------+

| description | OpenStack Image Service |

| id | 4bd9e223e4b5499293e5dfc576aed5c4 |

| name | glance |

| type | image |

+-------------+----------------------------------+

localadmin@server1:~$ keystone service-create --name swift --type object-store --description 'OpenStack Storage Service'

+-------------+----------------------------------+

| Property | Value |

+-------------+----------------------------------+

| description | OpenStack Storage Service |

| id | d9135dfee297423d9709949ddb8ff784 |

| name | swift |

| type | object-store |

+-------------+----------------------------------+

localadmin@server1:~$ keystone service-create --name keystone --type identity --description 'OpenStack Identity Service'

+-------------+----------------------------------+

| Property | Value |

+-------------+----------------------------------+

| description | OpenStack Identity Service |

| id | 133793c8df604ea1b7849439faae4553 |

| name | keystone |

| type | identity |

+-------------+----------------------------------+

localadmin@server1:~$ keystone service-create --name ec2 --type ec2 --description 'EC2 Service'

+-------------+----------------------------------+

| Property | Value |

+-------------+----------------------------------+

| description | EC2 Service |

| id | a234e9950dab4bdfaf974c52809c9b36 |

| name | ec2 |

| type | ec2 |

+-------------+----------------------------------+

localadmin@server1:~$ keystone service-list

+----------------------------------+----------+--------------+----------------------------+

+----------------------------------+----------+--------------+----------------------------+

| a234e9950dab4bdfaf974c52809c9b36 | ec2 | ec2 | EC2 Service |

+----------------------------------+----------+--------------+----------------------------+

localadmin@server1:~$sudo apt-get install glance glance-api glance-client glance-common glance-registry python-glance

localadmin@server1:~$ sudo vi /etc/glance/glance-api.conf

localadmin@server1:~$ sudo vi /etc/glance/glance-api-paste.ini

localadmin@server1:~$ sudo vi /etc/glance/glance-registry-paste.ini

localadmin@server1:~$ sudo vi /etc/glance/glance-registry.conf

localadmin@server1:~$ sudo vi /etc/glance/glance-api.conf

localadmin@server1:~$ sudo glance-manage version_control 0

localadmin@server1:~$ sudo glance-manage db_sync

/usr/lib/python2.7/dist-packages/glance/registry/db/migrate_repo/versions/003_add_disk_format.py:47: SADeprecationWarning: useexisting is deprecated. Use extend_existing.

useexisting=True)

localadmin@server1:~$

localadmin@server1:~$ sudo restart glance-api

glance-api start/running, process 16615

localadmin@server1:~$ sudo restart glance-registry

glance-registry start/running, process 16635

localadmin@server1:~$ export SERVICE_TOKEN=admin

localadmin@server1:~$ export OS_TENANT_NAME=admin

localadmin@server1:~$ export OS_USERNAME=admin

localadmin@server1:~$ export OS_PASSWORD=admin

localadmin@server1:~$ export OS_AUTH_URL="http://localhost:5000/v2.0/"

localadmin@server1:~$ export SERVICE_ENDPOINT=http://localhost:35357/v2.0

localadmin@server1:~$ glance index

localadmin@server1:~$ echo $?

localadmin@server1:~$

localadmin@server1:~$ sudo chown -R nova:nova /etc/nova

localadmin@server1:~$ sudo chmod 644 /etc/nova/nova.conf

localadmin@server1:~$ sudo vi /etc/nova/api-paste.ini

localadmin@server1:~$ sudo nova-manage db sync

2012-07-04 17:49:29 DEBUG nova.utils [-] backend from (pid=1302) __get_backend /usr/lib/python2.7/dist-packages/nova/utils.py:658

2012-07-04 17:50:46 WARNING nova.utils [-] /usr/lib/python2.7/dist-packages/sqlalchemy/pool.py:639: SADeprecationWarning: The 'listeners' argument to Pool (and create_engine()) is deprecated. Use event.listen().

Pool.__init__(self, creator, **kw)

2012-07-04 17:50:46 WARNING nova.utils [-] /usr/lib/python2.7/dist-packages/sqlalchemy/pool.py:145: SADeprecationWarning: Pool.add_listener is deprecated. Use event.listen()

self.add_listener(l)

2012-07-04 17:50:46 AUDIT nova.db.sqlalchemy.fix_dns_domains [-] Applying database fix for Es*** dns_domains table.

localadmin@server1:~$

localadmin@server1:~$ export OS_TENANT_NAME=admin

localadmin@server1:~$ export OS_USERNAME=admin

localadmin@server1:~$ export OS_PASSWORD=admin

localadmin@server1:~$ export OS_AUTH_URL="http://localhost:5000/v2.0/"

localadmin@server1:~$ sudo restart libvirt-bin; sudo restart nova-network; sudo restart nova-compute; sudo restart nova-api; sudo restart nova-jectstore; sudo restart nova-scheduler; sudo restart nova-volume; sudo restart nova-consoleauth;

libvirt-bin start/running, process 22987

nova-network start/running, process 1514

nova-compute start/running, process 1524

nova-api start/running, process 1533

restart: Unknown job: nova-jectstore

nova-scheduler start/running, process 1544

restart: Unknown instance:

nova-consoleauth start/running, process 1559

localadmin@server1:~$ sudo nova-manage service list

2012-07-04 17:53:20 DEBUG nova.utils [req-054484fc-ba70-494a-b932-b1760592096b None None] backend from (pid=1683) __get_backend /usr/lib/python2.7/dist-packages/nova/utils.py:658

Binary Host Zone Status State Updated_At

nova-consoleauth server1 nova enabled :-) 2012-07-04 09:53:16

nova-compute server1 nova enabled :-) 2012-07-04 09:53:10

nova-scheduler server1 nova enabled :-) 2012-07-04 09:53:17

nova-network server1 nova enabled :-) 2012-07-04 09:53:17

localadmin@server1:~$

localadmin@server1:~$ sudo apt-get install openstack-dashboard

localadmin@server1:~$ sudo service apache2 restart

* Restarting web server apache2 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

... waiting .apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

[ OK ]

localadmin@server1:~$

*************************** swift ****************************

localadmin@server1:~$ sudo apt-get install swift swift-proxy swift-account swift-container swift-object

localadmin@server1:~$ sudo apt-get install xfsprogs curl python-pastedeploy

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本文介绍了如何通过修改织梦DedeCms源代码来实现全站伪静态，以提高管理和SEO效果。全站伪静态可以避免重复URL的问题，同时通过使用mod_rewrite伪静态模块和.htaccess正则表达式，可以更好地适应搜索引擎的需求。文章还提到了一些相关的技术和工具，如Ubuntu、qt编程、tomcat端口、爬虫、php request根目录等。 ... [详细]

蜡笔小新 2023-12-14 19:45:47
post
基于PgpoolII的PostgreSQL集群安装与配置教程

本文介绍了基于PgpoolII的PostgreSQL集群的安装与配置教程。Pgpool-II是一个位于PostgreSQL服务器和PostgreSQL数据库客户端之间的中间件，提供了连接池、复制、负载均衡、缓存、看门狗、限制链接等功能，可以用于搭建高可用的PostgreSQL集群。文章详细介绍了通过yum安装Pgpool-II的步骤，并提供了相关的官方参考地址。 ... [详细]

蜡笔小新 2023-12-14 19:10:25
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每天收获一点点Hadoop概述

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蜡笔小新 2023-12-14 18:58:01
post
解决Docker中volume的权限问题的方法

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蜡笔小新 2023-12-14 18:48:02
string
VB.NET在线急等问题解决方法，如何统计数据库字段下的数据并显示在文本框里？

本文介绍了一个在线急等问题解决方法，即如何统计数据库中某个字段下的所有数据，并将结果显示在文本框里。作者提到了自己是一个菜鸟，希望能够得到帮助。作者使用的是ACCESS数据库，并且给出了一个例子，希望得到的结果是560。作者还提到自己已经尝试了使用"select sum(字段2) from 表名"的语句，得到的结果是650，但不知道如何得到560。希望能够得到解决方案。 ... [详细]

蜡笔小新 2023-12-13 15:15:30
export
FileNotFoundException: File does not exist

ubuntu用sqoop将数据从hive导入mysql时，命令： ... [详细]

蜡笔小新 2023-12-12 18:56:13
php
分享css中提升优先级属性!important的用法总结

web前端|css教程css!importantweb前端-css教程本文分享css中提升优先级属性!important的用法总结微信门店展示源码,vscode如何管理站点,ubu ... [详细]

蜡笔小新 2023-12-11 11:25:16
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Ubuntu下创建deb安装包及离线安装包制作的方法

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蜡笔小新 2023-12-10 21:32:50
php
Excel 数据导入 ORACLE 的方法及步骤详解

本文详细介绍了使用 SQL Load 和 Excel 的 Concatenate 功能将数据导入 ORACLE 数据库的方法和步骤，同时介绍了使用 PL/SQL tools 将数据导入临时表的方法。此外，还提供了一个转链接，可参考更多相关内容。摘要共计XXX字。 ... [详细]

蜡笔小新 2023-12-10 18:02:31
object
Wince程序内存和存储内存的分析及作用

本文分析了Wince程序内存和存储内存的分布及作用。Wince内存包括系统内存、对象存储和程序内存，其中系统内存占用了一部分SDRAM，而剩下的30M为程序内存和存储内存。对象存储是嵌入式wince操作系统中的一个新概念，常用于消费电子设备中。此外，文章还介绍了主电源和后备电池在操作系统中的作用。 ... [详细]

蜡笔小新 2023-12-10 16:21:27
ip
主从数据库架构配置及实验环境搭建方法

本文介绍了在Web应用系统中，数据库性能是导致系统性能瓶颈最主要的原因之一，尤其是在大规模系统中，数据库集群已经成为必备的配置之一。文章详细介绍了主从数据库架构的好处和实验环境的搭建方法，包括主数据库的配置文件修改和设置需要同步的数据库等内容。MySQL的主从复制功能在国内外大型网站架构体系中被广泛采用，本文总结了作者在实际的Web项目中的实践经验。 ... [详细]

蜡笔小新 2023-12-10 12:20:19
ip
Ubuntu系统清理残余配置文件和无用内容的方法

本文介绍了在Ubuntu系统中清理残余配置文件和无用内容的方法，包括清理残余配置文件、清理下载缓存包、清理不再需要的包、清理无用的语言文件和清理无用的翻译内容。通过这些清理操作可以节省硬盘空间，提高系统的运行效率。 ... [详细]

蜡笔小新 2023-12-09 10:04:56

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