Author: Zhang Hua posted: 2013-06-13Copyright notice: Can be reproduced arbitrarily, please be sure to use hyperlinks in the form of the original source of the article and the author's information and this copyright notice
(http://blog.csdn.net/quqi99)
In my opinion, the essence of SDN is technically mainly the following three points:
1) There is a controller that separates the control flow from the data stream. The switch will ask the controller which port the packet is forwarded to. The So
information about the resource and the metric it has (for example, instance resources have Cpu_util, memory.usage, etc. metric). Another function is to store metering data--Measures (
Gnocchi's data archiving strategy explains why: The archive policy determines the number of points, and each point has a storage space of 9 bytes, so the storage space for each metric file is predictable; gnocchi when a new measures is received, is dynamically aggregated according to a predefined aggregation meth
Reading this article requires the following knowledge reserves
1. Understanding the fundamentals of blockchain
2. Understanding the concept of smart contracts and consensus mechanisms
I am curious to learn how to exchange data with the outside world (traditional Internet systems) under the Blockchain network system, in short, how the intelligent contracts within the blockchain system share and exchange data with traditional Internet systems.
Suppose in the blockchain system of the rental app, th
Tags: OpenStack neutron network source codeStatement:This blog welcome reprint, but please keep the original author information, and please specify the source!Lin KaiTeam: Huawei Hangzhou OpenStack TeamIn the OpenStack grizzly release, the Neutron (then called quantum) component introduced a new network service: LoadBalancer (LBaaS), the framework and fundamentals of LoadBalancer have some good articles on the web, Don't dwell on it here. This article will loadbalancer code flow and implementati
applications Access databases, API interface calls, and so on, so the network must be interoperable and multi-tenant isolated, with the current Docker network having two major camps, CNM, and MLM. Which Calico can be considered both camps, it can be integrated with the kubernetes, compared to the overlay network in the network transmission process still has a clear advantage, as shown, reduced packet encapsulation improves network transmission and pa
difficulty of the future operation and maintenance. Simply put, in order to build a good SaaS application, in addition to the architecture based on cloud dynamic scale-out problem, no outside the following "One authentication, three isolation, a business scaling adaptation" problem:One certification: There is a unified strong tenant identification authentication system, a bit like single sign-onThree isolation:Authorization isolation: The system
Hardware requirements
Installing OpenStack
1 Installing the CentOS 65 system and emptying the Iptables firewall rules
2 The required toolkit for installing the system includes OpenStack-dependent and cloudfoundry-dependent
3 Installing Epel Repo
4 Upgrade Current system
5 Installing OpenStack Repo currently cloudfoundry can only support Havana version of OpenStack
6 Installing Packstack
7 Synchronization Time
8 Installing single-node OpenS
ControllerMysql-u Root-popenstackmysql> CREATE DATABASE Neutron;Mysql> GRANT all privileges on neutron.* to ' neutron ' @ ' localhost 'Identified by ' OpenStack ';Mysql> GRANT all privileges in neutron.* to ' neutron ' @ '% ' \Identified by ' OpenStack ';Mysql> exitTo create a neutron user:Keystone User-create--name Neutron--pass neutron--email [email protected]Assign the neutron user Administrator role:Keystone User-role-add--user Neutron--tenant ser
modify a part of the system, because each part of the program is independent from other parts of the program in a large program.
A simple exampleThe following is an example of tight coupling. The managmentcontroller class directly depends on the tenantstore class. These classes can be distributed across different visusal studio projects.
1 public class TenantStore 2 { 3 ... 4 public Tenant GetTenant(string
. For detailed installation steps of Keystone, see
Http://docs.openstack.org/icehouse/install-guide/install/apt/content/keystone-install.html
4. admin_token
This admin_token should be worth noting. It is equivalent to an authentication password. You can configure it as needed in the test environment, for example, admin_token = admin.
5. Define User, tenants, Roles
Http://docs.openstack.org/icehouse/install-guide/install/apt/content/keystone-users.html
This configuration has been described in det
Migration Console ApplicationThe AspNet Zero contains a tool Migrator.exe for easy migration of databases. You can run this application to create/migrate host and tenant databases. the application Gets the host connection string from its own Appsettings.json file . It will be at the beginning. The same in Appsettings.json in the Web project. Make sure that the connection string in the configuration file is the database you want. after getting the
The eeplat PAAs platform provides a metadata-driven configuration-based rapid development platform and a complete multi-tenant implementation. Each tenant has its own independent applications and databases, tenants completely isolate applications and data. The eeplat PAAs platform includes four subsystems: Multi-tenant management subsystem, enterprise applicatio
file of amoeba, the IP address of the server is the same as the port, therefore, I configure the common IP address as per my needs.
Add three servers. The Code is as follows:
4. Configure rule. xml
My configuration is as follows:
VaR division = ID % 2;
Case Division when 0 then 'server1 ';
When 1 then 'server2 ';
End case;
]>
The key is the tablerule attribute. In the first section of the red code, I split the table tenant
container-type public host 100,000, deployed over 500,000 times. The new Ecos-kubernetes platform enables the container to be clustered across hosts, flexibly control the functions in the form of plug-in management, the introduction of tenant concept strengthens the control of permissions, customized security cloud defenses to solve the security risks of Docker. In the new version, Ghostcloud has made technological innovations and also achieved innov
turnover of 30 per dayThree level agent can enjoy the platform new turnover of 20 per dayFive, micro-business dividend rebate app platform currency?1. Commission: Can withdraw2. Points: Can not withdraw cash, can be donated, can be repeated in the mall consumption3. Fund: Not to withdraw, not to buy, not to be donatedSix, micro-business dividend rebate app platform can have a tenant?Micro-business Dividend rebate app platform can be added to the role
Agent Mode description
Description: As the name implies is to use a class to replace another class to perform the method function, this pattern is somewhat similar to the decoration pattern, not the same, the proxy mode is to initialize the proxy object class instead of the client, and the decoration mode is implemented by the interface or the initial adorner parameter reference.
In the dynamic object-oriented language, the agent mode plays the role of controlling and modifying the proxy c
): 1 flowentries have been.
If you re performing vm1 Ping vm2, you will not be able to ping this time. This message will still go into iptables because the default security group has removed the ingress rule, so the condition that the ICMP message can flow into the vm2 is still to be able to satisfy the state related,established.
But this time the ICMP message is considered a new state. View Conntrack found that although the old entry (ID 11521) still exists, the process of pinging is consider
Statement:This blog welcome reprint, but please keep the original author information, and please specify the source!Lin KaiTeam: Huawei Hangzhou OpenStack TeamIn the Openstackgrizzly version, the Neutron (then called quantum) component introduced a new network service: LoadBalance (LBaaS), the framework and fundamentals of loadbalance have some good articles on the web, Don't dwell on it here. This article will loadbalancer code flow and implementation of the preliminary analysis, there will be
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