Winserver's Consul Deployment Beijing _ Racing collection repair practice with. NET Core client use

With the emergence of micro-services, the management of services is extremely important. All know that microservices are "split", the bloated single-block application, split into a number of lightweight services, each service can be in a short period of time to reconstruct, iterate, delivery. With the increase in the number of micro-services, due to quantitative quality, resulting in a new problem one of which is the management of services. With the growth of micro-services in the business, it is possible that the technology leader can not clearly remember the deployment of services, the health of services can not always pay attention to, so the role of service governance system is essential.

Beijing _ Racing Collection Repair

Address one: "hubawl.com" Fox PA Source Forum
Address two: "Bbscherry.com"

Consul

Consul is a simple, easy-to-use, scalable and strong service governance system.

The main core features are:

Service discovery

Health Check

Key-Value Storage

Multi-Data center

The consul agent accesses the Registry's service node each time, if the response code of "20X" is considered healthy.

A key-value store can be thought of as a simple k/v database, so you can use this to store configuration information.

Service discovery

Service Discovery Sub-service registration and service lookup.

Service Registration

Add (remove) the Service node information (address + port) to the registry, which records the node information and status of the service

Service Finder

The node information that is queried by other services or systems through the registry to the specified available service.

How services are discovered

The way of service discovery is divided into autonomous and proxy type.

Autonomous type

Each service actively adds (deletes) its own node information to the registry. The implementation is through the unified encapsulation or the library, by the service each node undertakes the service discovery function, compared with the proxy type to share the access pressure by the respective node.

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Proxy type

Service discovery is done by a system (load balancing System) or service (API Gateway). Because a system or service is complete, as the enrollment service increases the performance bottleneck, you need to do this cluster.

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Consul mode

There are two modes of consul, client and server, and there is a consul agent in all modes.

Client mode

The client mode is a lightweight consul agent that only has functions such as registration services, health checks, and forwarding queries.

Server mode

Compared with client mode, the server mode has more data storage, leader elections, and so on, besides the function of client mode.

The official recommendation server mode should be guaranteed 3-5, and should be odd, for what, because less than 3 can not guarantee high availability, more than 5 will give the consistency of database synchronization pressure, and the client number control is not fastidious.

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Cluster deployment

On Server A, open cmd,

Consul Agent-server-bootstrap-expect=1-bind=192.168.20.80-client=192.168.20.80-join=192.168.20.80-datacenter= Dc1-data-dir=data-ui-node=consul-80
On Server B, open cmd,

Consul agent-server-bind=192.168.20.81-client=192.168.20.81-join=192.168.20.80-data-dir=data-node=consul-81

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Brief analysis of Directives

-server

Consul is started in server mode and is not populated by default in client mode

-bootstrap-expect=1

Number of cluster nodes, data synchronization occurs when the number of cluster nodes reaches the number of claims

-bind=192.168.20.80

Current Consul Service binding address

-client=192.168.20.80

HTTP interface binding address, client call required

-join=192.168.20.80

Join target cluster when starting service

-node=consul-81

Service Node Name

-ui

Start Web Management background

Client Practice

Installing consul

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Encapsulation extension

Only part of the core code, the specific can view the demo source.

Inject consulclient

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Register the current service to consul

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Add Health Check Interface

With the above package can be in the same library, avoid each Web service to write a

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Calls to the consul package in Startup.cs

Configureservices

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Configure

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k/v extension

Only put, get, delete are implemented, and the rest can be added on demand

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Deployment Startup

Modify Appsettings.json, fill in the target Consul address and the service address

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After startup, the effect can be displayed if the service is healthy.

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Winserver's Consul Deployment Beijing _ Racing collection repair practice with. NET Core client use