Swarm source Analysis (2)---manage process and store

The original of this article QQ Space link: http://user.qzone.qq.com/29185807/blog/1462853926

The original article csdn blog link: http://blog.csdn.net/screscent/article/details/51362116

In the previous article, the analysis of Create and join was created and joined to the swarm cluster. So how the Swarm cluster works and manages it.

Let's analyze it below. 1, Swarm manage main body construction process

Let's see how the Manage command was built.

Code in Swarm\main.go

The action here is the Manage function.

Let's take a look at this function

Code in Swarm\manage.go

The above is mainly TLS configuration

It builds a store.

It builds a cluster

It builds a strategy

The above constructs a filter

It builds a discovery

It builds a scheduler

Finally, the API service is turned on

The overall build process is clear and modular is clear.

Here we have a module to analyze

2, Store

Code in Swarm\state\store.go

Let's look at the structure first.

The annotation here is very clear, is to have a simple key "--" requestedstate map storage

Let's see requestedstate.

Code in Swarm\state\state.go

Let's see Containerconfig again.

Code in Github.com\samalba\dockerclient\types.go

It's clear here that the store keeps the container information.

Here's what the store offers.

Newstore

Initializing directory paths and map Initialize

Called the Restore

Restore

Traverse all files in the directory and use JSON to load

Load

Using JSON to parse a file get

Find the corresponding information from the map Add

Called the set set

Write the information to the file and save the information to the map remove

Delete the file and delete the information in the map Replace

Replace

Summary

Stroe is also very simple, mainly maintaining a directory file and a map store.

If there is a place where the explanation is wrong, please forgive me and look at it.

Hao Haohua

QQ Crescent moon Lonely Road length 29185807

May 10, 2016

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