openstack一键安装脚本（转载）

#!/bin/sh
# openstack pike 单机 一键安装
# 环境 centos 7.4.1708 x86_64
# 更多内容 http://dwz.cn/openstack
# Myde by Elven[[ `uname -r` = *el7* ]] && { echo '开启安装openstack pike'; } || { echo '请在CentOS7.4 环境运行';exit; }##########################################
#参数#获取第一块网卡名、ip地址
Net=`ip add|egrep global|awk '{ print $NF }'|head -n 1`
IP=`ip add|grep global|awk -F'[ /]+' '{ print $3 }'|head -n 1`
echo  "网卡名称:$Net"
echo  "IP地址:  $IP"#参数
DBPass=elven2017    #SQL root密码
Node=controller     #节点名
Netname=$Net        #网卡名称
MyIP=$IP            #IP地址
VncProxy=$IP        #VNC代理外网IP地址
Imgdir=/date/glance #自定义glance镜像目录
VHD=/date/nova      #自定义Nova实例路径
Kvm=qemu            #QEMU或KVM ,KVM需要硬件支持##########################################
#1、设置echo  '关闭selinux、防火墙'
systemctl stop firewalld.service
systemctl disable firewalld.service
firewall-cmd --state
sed -i '/^SELINUX=.*/c SELINUX=disabled' /etc/selinux/config
sed -i 's/^SELINUXTYPE=.*/SELINUXTYPE=disabled/g' /etc/selinux/config
grep --color=auto '^SELINUX' /etc/selinux/config
setenforce 0echo  '时间同步'
/usr/sbin/ntpdate ntp6.aliyun.com 
echo "*/3 * * * * /usr/sbin/ntpdate ntp6.aliyun.com  &> /dev/null" > /tmp/crontab
crontab /tmp/crontabecho  '设置hostname'
hostnamectl set-hostname $Node
echo "$SetIP   $Node">>/etc/hostsecho  '自定义openstack源'
wget -O /etc/yum.repos.d/Ali-pike.repo http://elven.vip/ks/openstack/Ali-pike.repo
yum clean all && yum makecache #生成缓存##########################################
#2 安装function installrpm() 
{
echo  'OpenStack tools 安装'
yum install -y python-openstackclient openstack-selinux \python2-PyMySQL openstack-utils 
echo  'MariaDB安装'
yum install mariadb mariadb-server mariadb-galera-server -y
yum install expect -y
echo  'RabbitMQ安装'
yum install rabbitmq-server erlang socat -y
echo  'Keystone安装'
yum install -y openstack-keystone httpd mod_wsgi memcached python-memcached
yum install apr apr-util -y
echo  '安装Glance'
yum install -y openstack-glance python-glance
echo  '安装nova'
yum install -y openstack-nova-api openstack-nova-conductor \openstack-nova-console openstack-nova-novncproxy \openstack-nova-scheduler openstack-nova-placement-api \openstack-nova-compute
echo  '安装neutron'
yum install -y openstack-neutron openstack-neutron-ml2 \openstack-neutron-linuxbridge python-neutronclient ebtables ipset
echo  '安装dashboard'
yum install openstack-dashboard -y
}echo  '安装openstack'
installrpm
echo  '再次安装，防止下载失败'
installrpm##########################################
#3、配置# #------------------#####################
echo 'SQL数据库配置'
cp /etc/my.cnf.d/openstack.cnf{,.bak}
echo "#
[mysqld]
bind-address = 0.0.0.0
default-storage-engine = innodb
innodb_file_per_table
max_connections = 4096
collation-server = utf8_general_ci
character-set-server = utf8
#">/etc/my.cnf.d/openstack.cnf
echo '启动数据库服务'
systemctl enable mariadb.service
systemctl start mariadb.service
sleep 5
netstat -antp|grep mysqld
#mysql_secure_installation #初始化设置密码,自动交互
[[ -f /usr/bin/expect ]] || { yum install expect -y; } #若没expect则安装
/usr/bin/expect << EOF
set timeout 30
spawn mysql_secure_installation
expect {"enter for none" { send "\r"; exp_continue}"Y/n" { send "Y\r" ; exp_continue}"password:" { send "$DBPass\r"; exp_continue}"new password:" { send "$DBPass\r"; exp_continue}"Y/n" { send "Y\r" ; exp_continue}eof { exit }
}
EOF
#测试
mysql -u root -p$DBPass -e "show databases;"
[ $? = 0 ] || { echo "mariadb初始化失败";exit; }echo '创建数据库、用户授权'
mysql -u root -p$DBPass -e "
create database keystone;
grant all privileges on keystone.* to 'keystone'@'localhost' identified by 'keystone';
grant all privileges on keystone.* to 'keystone'@'%' identified by 'keystone';
create database glance;
grant all privileges on glance.* to 'glance'@'localhost' identified by 'glance';
grant all privileges on glance.* to 'glance'@'%' identified by 'glance';create database nova;
grant all privileges on nova.* to 'nova'@'localhost' identified by 'nova';
grant all privileges on nova.* to 'nova'@'%' identified by 'nova';
create database nova_api;
grant all privileges on nova_api.* to 'nova'@'localhost' identified by 'nova';
grant all privileges on nova_api.* to 'nova'@'%' identified by 'nova';
create database nova_cell0;
grant all privileges on nova_cell0.* to 'nova'@'localhost' identified by 'nova';
grant all privileges on nova_cell0.* to 'nova'@'%' identified by 'nova';create database neutron;
grant all privileges on neutron.* to 'neutron'@'localhost' identified by 'neutron';
grant all privileges on neutron.* to 'neutron'@'%' identified by 'neutron';flush privileges;
select user,host from mysql.user;
show databases;
"
#
# #------------------#####################
echo 'RabbitMQ配置'
systemctl enable rabbitmq-server.service
systemctl start rabbitmq-server.service
sleep 3
rabbitmq-plugins enable rabbitmq_management  #启动web插件端口15672
#添加用户及密码
rabbitmqctl  add_user admin admin
rabbitmqctl  set_user_tags admin administrator
rabbitmqctl add_user openstack openstack 
rabbitmqctl set_permissions openstack ".*" ".*" ".*" 
rabbitmqctl  set_user_tags openstack administrator
systemctl restart rabbitmq-server.service
sleep 3
netstat -antp|grep '5672'# #------------------#####################
#Keystone
#memcached启动
cp /etc/sysconfig/memcached{,.bak}
systemctl enable memcached.service
systemctl start memcached.service
netstat -antp|grep 11211echo  'Keystone 配置'
cp /etc/keystone/keystone.conf{,.bak}  #备份默认配置
Keys=$(openssl rand -hex 10)  #生成随机密码
echo $Keys
echo "kestone  $Keys">/root/openstack.log
echo "
[DEFAULT]
admin_token = $Keys
verbose = true
[database]
connection = mysql+pymysql://keystone:keystone@controller/keystone
[token]
provider = fernet
driver = memcache
[memcache]
servers = controller:11211
">/etc/keystone/keystone.conf#初始化身份认证服务的数据库
su -s /bin/sh -c "keystone-manage db_sync" keystone
#检查表是否创建成功
mysql -h controller -ukeystone -pkeystone -e "use keystone;show tables;"
#初始化密钥存储库
keystone-manage fernet_setup --keystone-user keystone --keystone-group keystone
keystone-manage credential_setup --keystone-user keystone --keystone-group keystone
#设置admin用户（管理用户）和密码
keystone-manage bootstrap --bootstrap-password admin \--bootstrap-admin-url http://controller:35357/v3/ \--bootstrap-internal-url http://controller:5000/v3/ \--bootstrap-public-url http://controller:5000/v3/ \--bootstrap-region-id RegionOne#apache配置
cp /etc/httpd/conf/httpd.conf{,.bak}
echo "ServerName controller">>/etc/httpd/conf/httpd.conf
ln -s /usr/share/keystone/wsgi-keystone.conf /etc/httpd/conf.d/#Apache HTTP 启动并设置开机自启动
systemctl enable httpd.service
systemctl restart httpd.service
sleep 3
netstat -antp|egrep ':5000|:35357|:80'#创建 OpenStack 客户端环境脚本
#admin环境脚本
echo "
export OS_PROJECT_DOMAIN_NAME=default
export OS_USER_DOMAIN_NAME=default 
export OS_PROJECT_NAME=admin 
export OS_USERNAME=admin
export OS_PASSWORD=admin
export OS_AUTH_URL=http://controller:35357/v3
export OS_IDENTITY_API_VERSION=3
export OS_IMAGE_API_VERSION=2
">./admin-openstack.sh
#测试脚本是否生效
source ./admin-openstack.sh
openstack token issue#创建service项目,创建glance,nova,neutron用户，并授权
openstack project create --domain default --description "Service Project" service
openstack user create --domain default --password=glance glance
openstack role add --project service --user glance admin
openstack user create --domain default --password=nova nova
openstack role add --project service --user nova admin
openstack user create --domain default --password=neutron neutron
openstack role add --project service --user neutron admin#创建demo项目(普通用户密码及角色)
openstack project create --domain default --description "Demo Project" demo
openstack user create --domain default --password=demo demo
openstack role create user
openstack role add --project demo --user demo user
#demo环境脚本
echo "
export OS_PROJECT_DOMAIN_NAME=default
export OS_USER_DOMAIN_NAME=default
export OS_PROJECT_NAME=demo
export OS_USERNAME=demo
export OS_PASSWORD=demo
export OS_AUTH_URL=http://controller:5000/v3
export OS_IDENTITY_API_VERSION=3
export OS_IMAGE_API_VERSION=2
">./demo-openstack.sh
#测试脚本是否生效
source ./demo-openstack.sh
openstack token issue# #------------------#####################
echo 'Glance镜像服务'
# keystone上服务注册 ,创建glance服务实体,API端点（公有、私有、admin）
source ./admin-openstack.sh || { echo "加载前面设置的admin-openstack.sh环境变量脚本";exit; }
openstack service create --name glance --description "OpenStack Image" image
openstack endpoint create --region RegionOne image public http://controller:9292
openstack endpoint create --region RegionOne image internal http://controller:9292
openstack endpoint create --region RegionOne image admin http://controller:9292cp /etc/glance/glance-api.conf{,.bak}
cp /etc/glance/glance-registry.conf{,.bak}
# images默认/var/lib/glance/images/
#Imgdir=/date/glance
mkdir -p $Imgdir
chown glance:nobody $Imgdir
echo "镜像目录： $Imgdir"
echo "#
[database]
connection = mysql+pymysql://glance:glance@controller/glance
[keystone_authtoken]
auth_uri = http://controller:5000/v3
auth_url = http://controller:35357/v3
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = glance
password = glance
[paste_deploy]
flavor = keystone
[glance_store]
stores = file,http
default_store = file
filesystem_store_datadir = $Imgdir
#">/etc/glance/glance-api.conf
#
echo "#
[database]
connection = mysql+pymysql://glance:glance@controller/glance
[keystone_authtoken]
auth_uri = http://controller:5000/v3
auth_url = http://controller:35357/v3
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = glance
password = glance
[paste_deploy]
flavor = keystone
#">/etc/glance/glance-registry.conf#同步数据库,检查数据库
su -s /bin/sh -c "glance-manage db_sync" glance
mysql -h controller -u glance -pglance -e "use glance;show tables;"#启动服务并设置开机自启动
systemctl enable openstack-glance-api openstack-glance-registry
systemctl start openstack-glance-api openstack-glance-registry
netstat -antp|egrep '9292|9191' #检测服务端口# #------------------#####################
#创建Nova数据库、用户、认证，前面已设置
source ./admin-openstack.sh# keystone上服务注册 ,创建nova用户、服务、API
# nova用户前面已建
openstack service create --name nova --description "OpenStack Compute" compute
openstack endpoint create --region RegionOne compute public http://controller:8774/v2.1
openstack endpoint create --region RegionOne compute internal http://controller:8774/v2.1
openstack endpoint create --region RegionOne compute admin http://controller:8774/v2.1
#创建placement用户、服务、API
openstack user create --domain default --password=placement placement
openstack role add --project service --user placement admin
openstack service create --name placement --description "Placement API" placement
openstack endpoint create --region RegionOne placement public http://controller:8778
openstack endpoint create --region RegionOne placement internal http://controller:8778
openstack endpoint create --region RegionOne placement admin http://controller:8778mkdir -p $VHD
chown -R nova:nova $VHD
echo 'nova配置'
echo '#
[DEFAULT]
instances_path='$VHD'
enabled_apis = osapi_compute,metadata
transport_url = rabbit://openstack:openstack@controller
my_ip = '$MyIP'
use_neutron = True
firewall_driver = nova.virt.firewall.NoopFirewallDriver
osapi_compute_listen_port=8774[api_database]
connection = mysql+pymysql://nova:nova@controller/nova_api
[database]
connection = mysql+pymysql://nova:nova@controller/nova[api]
auth_strategy = keystone
[keystone_authtoken]
auth_uri = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = nova[vnc]
enabled = true
vncserver_listen = $my_ip
vncserver_proxyclient_address = $my_ip
novncproxy_base_url = http://'$VncProxy':6080/vnc_auto.html[glance]
api_servers = http://controller:9292
[oslo_concurrency]
lock_path = /var/lib/nova/tmp[placement]
os_region_name = RegionOne
project_domain_name = Default
project_name = service
auth_type = password
user_domain_name = Default
auth_url = http://controller:35357/v3
username = placement
password = placement[scheduler]
discover_hosts_in_cells_interval = 300[libvirt]
virt_type = '$Kvm'
#'>/etc/nova/nova.confecho "#Placement API
<Directory /usr/bin><IfVersion >= 2.4>Require all granted</IfVersion><IfVersion < 2.4>Order allow,denyAllow from all</IfVersion>
</Directory>
">>/etc/httpd/conf.d/00-nova-placement-api.conf
systemctl restart httpd
sleep 5#同步数据库
su -s /bin/sh -c "nova-manage api_db sync" nova
su -s /bin/sh -c "nova-manage cell_v2 map_cell0" nova
su -s /bin/sh -c "nova-manage cell_v2 create_cell --name=cell1 --verbose" nova
su -s /bin/sh -c "nova-manage db sync" nova#检测数据
nova-manage cell_v2 list_cells
mysql -h controller -u nova -pnova -e "use nova_api;show tables;"
mysql -h controller -u nova -pnova -e "use nova;show tables;" 
mysql -h controller -u nova -pnova -e "use nova_cell0;show tables;"
# #------------------#####################echo 'Neutron服务'
source ./admin-openstack.sh 
# 创建Neutron服务实体,API端点
openstack service create --name neutron --description "OpenStack Networking" network
openstack endpoint create --region RegionOne network public http://controller:9696
openstack endpoint create --region RegionOne network internal http://controller:9696
openstack endpoint create --region RegionOne network admin http://controller:9696#Neutron 备份配置
cp /etc/neutron/neutron.conf{,.bak2}
cp /etc/neutron/plugins/ml2/ml2_conf.ini{,.bak}
ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini
cp /etc/neutron/plugins/ml2/linuxbridge_agent.ini{,.bak}
cp /etc/neutron/dhcp_agent.ini{,.bak}
cp /etc/neutron/metadata_agent.ini{,.bak}
cp /etc/neutron/l3_agent.ini{,.bak}#配置
echo '
#
[neutron]
url = http://controller:9696
auth_url = http://controller:35357
auth_type = password
project_domain_name = default
user_domain_name = default
region_name = RegionOne
project_name = service
username = neutron
password = neutron
service_metadata_proxy = true
metadata_proxy_shared_secret = metadata
#'>>/etc/nova/nova.conf
#
echo '
[DEFAULT]
nova_metadata_ip = controller
metadata_proxy_shared_secret = metadata
#'>/etc/neutron/metadata_agent.ini
#
echo '#
[ml2]
tenant_network_types = 
type_drivers = vlan,flat
mechanism_drivers = linuxbridge
extension_drivers = port_security
[ml2_type_flat]
flat_networks = provider
[securitygroup]
enable_ipset = True
#'>/etc/neutron/plugins/ml2/ml2_conf.ini
echo '#
[linux_bridge]
physical_interface_mappings = provider:'$Netname'
[vxlan]
enable_vxlan = false[agent]
prevent_arp_spoofing = True
[securitygroup]
firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
enable_security_group = True
#'>/etc/neutron/plugins/ml2/linuxbridge_agent.ini
#
echo '#
[DEFAULT]
interface_driver = linuxbridge
dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
enable_isolated_metadata = true
#'>/etc/neutron/dhcp_agent.ini
#
echo '
[DEFAULT]
core_plugin = ml2
service_plugins = router
allow_overlapping_ips = true
transport_url = rabbit://openstack:openstack@controller
auth_strategy = keystone
notify_nova_on_port_status_changes = true
notify_nova_on_port_data_changes = true[keystone_authtoken]
auth_uri = http://controller:5000
auth_url = http://controller:35357
memcached_servers = controller:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = neutron
password = neutron[nova]
auth_url = http://controller:35357
auth_plugin = password
project_domain_id = default
user_domain_id = default
region_name = RegionOne
project_name = service
username = nova
password = nova[database]
connection = mysql://neutron:neutron@controller:3306/neutron[oslo_concurrency]
lock_path = /var/lib/neutron/tmp 
#'>/etc/neutron/neutron.conf
#
echo '
[DEFAULT]
interface_driver = linuxbridge
#'>/etc/neutron/l3_agent.ini
#
#同步数据库
su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf \--config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade head" neutron
#检测数据
mysql -h controller -u neutron -pneutron -e "use neutron;show tables;" # #------------------#####################
#dashboardecho '配置openstack Web'
cp /etc/openstack-dashboard/local_settings{,.bak}
Setfiles=/etc/openstack-dashboard/local_settings
sed -i 's#_member_#user#g' $Setfiles
sed -i 's#OPENSTACK_HOST = "127.0.0.1"#OPENSTACK_HOST = "controller"#' $Setfiles
##允许所有主机访问#
sed -i "/ALLOWED_HOSTS/cALLOWED_HOSTS = ['*', ]" $Setfiles
#去掉memcached注释#
sed -in '153,158s/#//' $Setfiles 
sed -in '160,164s/.*/#&/' $Setfiles
sed -i 's#UTC#Asia/Shanghai#g' $Setfiles
sed -i 's#%s:5000/v2.0#%s:5000/v3#' $Setfiles
sed -i '/ULTIDOMAIN_SUPPORT/cOPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT = True' $Setfiles
sed -i "s@^#OPENSTACK_KEYSTONE_DEFAULT@OPENSTACK_KEYSTONE_DEFAULT@" $Setfiles
echo '
#set
OPENSTACK_API_VERSIONS = {"identity": 3,"image": 2,"volume": 2,
}
#'>>$Setfiles
systemctl restart httpd
sleep 5##########################################echo '启动服务'
#Apache 
systemctl enable httpd.service
#systemctl restart httpd haproxy
#netstat -antp|egrep 'httpd'#glance服务
systemctl enable openstack-glance-api openstack-glance-registry
systemctl restart openstack-glance-api openstack-glance-registry#nova服务systemctl enable openstack-nova-api.service \openstack-nova-consoleauth.service openstack-nova-scheduler.service \openstack-nova-conductor.service openstack-nova-novncproxy.service \libvirtd.service openstack-nova-compute.service
#启动
systemctl start openstack-nova-api.service \openstack-nova-consoleauth.service openstack-nova-scheduler.service \openstack-nova-conductor.service openstack-nova-novncproxy.service \libvirtd.service openstack-nova-compute.service#neutron服务
systemctl enable neutron-server.service \neutron-linuxbridge-agent.service neutron-dhcp-agent.service \neutron-metadata-agent.service neutron-l3-agent.service
systemctl start neutron-server.service \neutron-linuxbridge-agent.service neutron-dhcp-agent.service \neutron-metadata-agent.service neutron-l3-agent.service##########################################
#cheackecho "查看节点"
source ./admin-openstack.sh 
openstack compute service list
openstack network agent list##########################################
#endecho '
安装完毕！
数据库root密码 '$DBPass'登录Web管理 http://'$MyIP'/dashboard
域   default
用户 admin
密码 admin
推荐 火狐浏览器
'
##########################################
# #使用
# yum install -y wget && wget -O pike.install.sh http://elven.vip/ks/openstack/pike.install.sh && sh pike.install.sh

 

转载于:https://www.cnblogs.com/Dev0ps/p/7845010.html

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.mzph.cn/news/268091.shtml

如若内容造成侵权/违法违规/事实不符，请联系多彩编程网进行投诉反馈email:809451989@qq.com，一经查实，立即删除！

相关文章

什么是Spring bean

什么是Spring bean

阅读更多...
Win7下硬盘安装Ubuntu10.10双系统

Win7下硬盘安装Ubuntu10.10双系统

1. 事先分区 在Win7系统里&#xff0c;用Acronis Disk Director Suite给ubuntu系统分4个区&#xff1a; 名字&#xff1a;/swap 格式&#xff1a;swap 大小&#xff1a;3GB 名字&#xff1a;/boot 格式&#xff1a;ext3 大小&#xff1a;2GB 名字&#xff1a;/home 格式&#x…
阅读更多...
浅谈性能测试分析

浅谈性能测试分析

性能测试工程师基本上都能够掌握利用测试工具来作负载、压力测试&#xff0c;但多数人对怎样去分析工具收集到的测试结果感到无从下手&#xff0c;下面我就把个人工作中的体会和收集到的有关资料整理出来&#xff0c;希望能对大家分析测试结果有所帮助。 分析原则&#xff1a; …
阅读更多...
Bean的生命周期回掉方法

Bean的生命周期回掉方法

上面三个是在bean的生命周期的初始化调用的 下面三个是在bean的生命周期的销毁调用的
阅读更多...
【STM32 .Net MF开发板学习-18】GPRS遥控智能小车

【STM32 .Net MF开发板学习-18】GPRS遥控智能小车

有了Wifi间接控制智能小车的经验&#xff0c;很自然的想到&#xff0c;也可以通过GPRS远程遥控智能小车&#xff0c;因为从通信原理上看&#xff0c;二者其实没有什么本质的不同&#xff0c;都是基于Socket的TCP通信&#xff0c;其控制环节如下&#xff1a; 手机 > GPRS&…
阅读更多...
大数据学习之Linux环境搭建（导航）

大数据学习之Linux环境搭建（导航）

环境搭建过程网上有挺多&#xff0c;但在安装过程&#xff0c;难免会出现一些其他错误&#xff0c;所以是对自己在搭建环境过程中的一个记录。 首先是VMware软件的安装&#xff0c;没什么说的&#xff0c;一直“下一步”就好了&#xff0c;虚拟机下安装Linux系统也比较简单&…
阅读更多...
在RHEL5下实现RAID5磁盘阵列

在RHEL5下实现RAID5磁盘阵列

在Linux系统中做RAID,磁盘阵列的设备可以是一块磁盘中的三个以上的分区&#xff0c;也可以是三块或以上的磁盘。本文主要以几块磁盘为例&#xff0c;来实现在RAID5。实验说明&#xff1a;在VMware中进行&#xff0c;系统中有一块磁盘sda,新添加6块SCSI磁盘&#xff0c;分别为sd…
阅读更多...
BeanFactoryPostProcessor实现在所有的BeanDefinition注册完之后帮我们进行扩展(调用)

BeanFactoryPostProcessor实现在所有的BeanDefinition注册完之后帮我们进行扩展(调用)

实现BeanFactoryPostProcessor接口 spring会在所有的BeanDefinition注册完之后帮我们进行扩展(调用) BeanFactory的后置处理器就是BeanFactoryPostProcessor接口&#xff0c;该接口有一个方法postProcessBeanFactory&#xff0c;这个方法会在BeanFactory初始化之后调用&#…
阅读更多...
HDU 1727 Hastiness（模拟）

HDU 1727 Hastiness（模拟）

Hastiness Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1793 Accepted Submission(s): 693 Problem Description How many problems did you AC? When you read this problem, don’t hasty and careless, th…
阅读更多...
手机支付：电信运营商会被边缘化吗？！

手机支付：电信运营商会被边缘化吗？！

手机支付未来有巨大的发展机会&#xff0c;这点大家没有意见。手机支付运营商会在其中扮演重要角色&#xff0c;这可能也是大家都没有意见的说法。但是&#xff0c;我相信&#xff0c;这个说法可能会越来越有问题。有一天手机支付&#xff0c;电信运营商被边缘化也不是没有可能…
阅读更多...
spring有哪几种配置方式

spring有哪几种配置方式

阅读更多...
第七周作业

第七周作业

#include<stdio.h> int main(){int i,N;scanf("%d",&N);double s0;int flag-1;for(i1;i<N;i){ flag-flag; ssi*1.0/(2*i-1)*flag; } printf("%0.3f",s); return 0; } 7-3&#xff1a; 设计思路&#xff1a; &#xff08;1&#xff09;定义变量…
阅读更多...
使用Exchange 2007的几个注意事项

使用Exchange 2007的几个注意事项

http://wangchunhai.blog.51cto.com/225186/152384Exchange Server 2007是Microsoft推出的电子邮件服务器软件&#xff0c;该产品与Exchange Server 2003的改进很大&#xff0c;第一次使用该产品的用户&#xff0c;会碰到一些问题。本文将为大家介绍Exchange 2007中“比较困惑”…
阅读更多...
exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException

exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException

原因&#xff1a; Spring Boot异常org.springframework.beans.factory.NoUniqueBeanDefinitionException&#xff1a;没有可用的合格Bean类型&#xff1a;预期匹配单个Bean&#xff0c;但是匹配到了多个&#xff0c;当该bean被自动装配时与Spring Boot应用程序上下文中的两个或…
阅读更多...
大数据平台助力核与辐射安全监管

大数据平台助力核与辐射安全监管

大数据平台助力核与辐射安全监管 核能开发利用是大国发展的战略必争之地&#xff0c;也是调整能源结构、应对气候变化和建设生态文明&#xff0c;进而确保国家安全的重要手段。虽然我国核与辐射安全监管能力不断提升&#xff0c;但仍面临诸多挑战。 为适应新形势和新要求&#…
阅读更多...
cube、rollup及exec的用法实例

cube、rollup及exec的用法实例

cube、rollup及exec的用法实例 select sdept 系部,sno 学号,max(sage) 最大年龄, grouping(sno) s1/**goruping是一个聚合函数,其产生一个附加的列,当用cube或rollup运算符添加行时,附加的列输出值为1, 当所添加的行不是由cube或rollup产生时,附加列值为…
阅读更多...
@Autowired注解自动装配的过程

@Autowired注解自动装配的过程

阅读更多...
某近似模板题2

某近似模板题2

P3388 【模板】割点&#xff08;割顶&#xff09; 题目背景 割点 题目描述 给出一个n个点&#xff0c;m条边的无向图&#xff0c;求图的割点。 输入输出格式 输入格式&#xff1a; 第一行输入n,m 下面m行每行输入x,y表示x到y有一条边 输出格式&#xff1a; 第一行输出割点个数 …
阅读更多...
Linux命令之hexdump

Linux命令之hexdump

用途说明 hexdump命令一般用来查看”二进制“文件的十六进制编码&#xff0c;但实际上它的用途不止如此&#xff0c;手册页上的说法是“ascii, decimal, hexadecimal, octal dump“&#xff0c;这也就是本文标题为什么要将”十六“给引起来的原因&#xff0c;而且它能查看任何文…
阅读更多...
@Bean之间的方法调用是怎么保证单例的

@Bean之间的方法调用是怎么保证单例的

阅读更多...
最新文章

Copyright @ 2022~2023