Introduction to OpenStack

What is OpenStack?

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OpenStack is an open-source cloud operating system and an open source Linux system. Located at the infrastructure level, it is a tool for building cloud environments.

Projects for OpenStack

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The architecture of OpenStack:

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Nova Services:

nova-COMPUTE Services:

Management of instance life cycle

Available based on Restapi

Hypervisor shielding, support kvm,xen,hyper-v,docker and so on.

Supports horizontal scaling

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neutron-Network Services:

Management of virtual networks (creating a network topology for virtual machines)

Provides tenant-oriented management (SDN)

Highly configurable plugin architecture (Linux-bridge openvswitch, hardware network management Implementation)

Rest-based APIs

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keystone-Identity Authentication Service:

Certifications and authorizations

Management of users, tenants, and roles

Management of the service catalog

Supports multiple authentication mechanisms (MYSQL,LDAP,AD, etc.)

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glance-Mirroring Service

Registration, querying of images

Role-based access control

Supports multiple formats of mirroring (Raw, Qcow2)

Supports multiple back-end storage (s3,swift,file System)

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horizon-Control Panel Service web-based UI mode

cinder-Block Storage Service

Provides EBS-like block storage

Reduce the complexity of nova and reduce the load on Nova

Supports multiple back-end storage

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swift-Object Storage Service (Ceph GLUSFS)

Reliable Object Storage

No capacity limit

No single point of failure

Support S3api

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ceilometer-Metering Services

Resource monitoring and measurement

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Deployment mode of the process:

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A few basic concepts:

User: For identity authentication, one user can belong to multiple tenants

A tenant (Tenant) is the concept of a user group, a tenant that contains multiple users and can map a project member or department.

Role: System permissions combined with the concept of general torture oh there are admin and memeber two kinds

Example (Instance): A unit that represents computing power, such as a virtual machine, a Linux container, and so on.

Volume (Volume): Block storage, similar to a network disk

Snapshot (Snapshot) instance or a backup of a state of volume)

Router (Router)

Subnets (subnet)

Ports (Port)

This article is from the "Gaogaozi" blog, make sure to keep this source http://hangtiangazi.blog.51cto.com/8584103/1671459

Introduction to OpenStack