Shulou(Shulou.com)05/31 Report--

Today, I will talk to you about how to easily achieve a new way of arranging resources through ROS, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.

In our daily work, we must have encountered situations where we need to build the system quickly:

As a resource manager, you need to receive a certain number of and configured resource requests, which require network and storage devices to be in place as needed.

As a developer, you need to copy a set of development environment, a test environment and an online environment.

The architect plans a system that needs to be built on the cloud.

These scenes show the difficulties we encounter on a daily basis:

Extensive support and management of all kinds of cloud resources: this needs to include common basic IaaS resources and PaaS services, such as computing network resources such as hosts, routers, load balancers, as well as various databases, caches, big data, and storage services.

It is difficult to arrange and use resources: the technology stack is complex and difficult to use, and the realization of complex topological relations requires systematic knowledge and rich experience.

A large number of manual configuration operations are repeated by machines: not only the resources and their topological relationships are manually deployed according to configuration, but also the topological relationship between resources is a headache.

High learning cost: in the past, resource management relied on calling API through the command line, which increased the difficulty of operation and the cost of learning.

Thus it can be seen that automated operation and maintenance has become a rigid business demand for operation and maintenance personnel, and major cloud manufacturers have also launched their own resource scheduling services (Resource Orchestration, hereinafter referred to as ROS). The concept of ROS is "infrastructure is code". On the one hand, it uses version management of code thinking to record infrastructure changes, on the other hand, it automates operation and maintenance through code, which simplifies the complexity of writing code. Users describe the configuration and dependencies of multiple cloud computing resources (such as ECS, RDS, SLB) by using Json / Yaml format templates. And automatically complete the deployment and configuration of all cloud resources in multiple regions and multiple accounts, just like Lego bricks, which can be easily built by OPS personnel.

After a lot of research, we found that the most common scenario for CVM is to create 1 CVM based on the "current state" of the CVM, and the newly created CVM system disk and data disk are "in the current state". Let's take a website service as an example, the general operation and maintenance engineer will install some applications in the system disk or data disk, such as: Tomcat, Jenkins, MySql, website's own data / files, and so on. If you need to create another CVM that is consistent with the system or data status of the existing CVM, you can make the system disk into a custom image and the data disk into a snapshot. Then when you purchase a new CVM, the image selects the custom image, the snapshot of the data disk selects the snapshot, and the rules of the security group are configured with the same rules as the original CVM. You can create a new CVM based on the "current state" of the original CVM.

If you only need to create this CVM and do not need to record the historical status, the above method is more appropriate.

However, the actual situation is much more complicated than this. For example, the CVM may be created / released frequently; or the operator who generates the image is not the same person as the person who purchased the CVM. Once the purchase option is not selected correctly, the newly purchased CVM cannot be put into business, and the need for postpaid will be released again. The cost will inevitably be lost when the prepaid service expires or data migration is done. If you want to record or track the historical evolution of the CVM, such as security group configuration changes, basic images and other information, you also need to record separately.

In the face of the above problems, the operation and maintenance personnel use the template of ROS as the deliverable, define the fixed parameters of the resources in the template resources, and define the variable parameters in the template parameters to facilitate the input of actual parameters at run time. In this way, when you frequently create a CVM, you only need to enter the contents of the variable parameters, such as mirror ID, snapshot ID, or clone the original CVM, or have no variable parameters. All the definitions are described in the resources, and the templates are written according to the actual business requirements. Templates can also be stored in Github, which can track template history like managing code, or create internal operation and maintenance tools based on templates to automate operation and maintenance and replace "repetitive work" with the concept of "infrastructure is code".

We can see the powerful features of ROS:

Readable and easy-to-write text files: operators can edit text in JSON format directly or edit templates using a visual editor provided by the ROS console. Control the version of the template through SVN, Git and other version control tools to achieve the purpose of controlling the version of the infrastructure. You can also integrate the choreography capabilities of ROS with your own applications through API, SDK, etc., to achieve infrastructure as code (Infrastructure as Code).

Standardized resources and application delivery: independent software vendors (ISV) can deliver overall systems and solutions containing cloud resources and applications through ROS templates. Through this delivery method, ISV can integrate Aliyun's resources and ISV's software system to achieve unified delivery.

Manage a group of cloud resources through the resource stack (Stack) (a resource stack is a group of Ali cloud resources): the creation, deletion and cloning of cloud resources are completed on the basis of the resource stack. In DevOps practice, ROS clone development environment, test environment and online environment can be used to realize the overall migration and expansion of applications.

After understanding the power of ROS, we will create a variety of ROS templates in our daily use. As a result, we need more convenient tools to manage the template in our daily operation and maintenance management. In order to better manage local and cloud ROS templates, we launched Alibaba Cloud Toolkit-Alibaba ROS Templates to assist users in managing template files through a resource configuration file (.ros.config.yml).

Description: the .ros.config.yml file is the source file used by the Alibaba ROS Templates tool to manage templates.

Step 1: open your project in IntelliJ IDEA.

Step 2: create a template. There are two ways to create it:

Right-click your project name in IntelliJ IDEA and select New > AlibabaCloud ROS YAML Template or select New > AlibabaCloud ROS JSON Template.

Note: templates created in this way are not managed by the Alibaba ROS Templates tool. To use the template tool to manage, you need to add the template path to the .ros.config.yml file and move the template to the JSON and YAML folders.

Open the Alibaba ROS Templates tool to the right of IntelliJ IDEA, click Create, enter the name of the template, select the type of template, and create a local template.

Step 3: enter the resource type in the Resources parameter.

AlibabaCloud ROS YAML Template example

AlibabaCloud ROS JSON Template example

The fourth step: explain that the left mouse button of Ctrl+ can realize the jump between the position of parameters and parameters, and the suspension information of parameters can be realized by using Ctrl+ mouse suspension. The operation description of the template management function is shown in the following table:

Right-click the local template to do as needed:

The functional operation instructions are as follows:

Upload: upload template

Rename: rename template name

Delete: deleting local templates

Right-click the remote template to operate as needed:

The functional operation instructions are as follows:

Download: download template

Properties: viewing template attribute information

Delete: delete remote template

If you double-click the remote template, a temporary file will be opened by default. From the right-click menu, select Alibaba Cloud ROS > Update Template to display the modification of the remote template and update the remote template.

Resource stack management

Alibaba Cloud Toolkit-Alibaba Cloud ROS (Alibaba Cloud View) is a tool for managing the Ali Cloud Resource choreography product (ROS) resource stack, which can help you easily manage the remote resource stack.

Open your project in IntelliJ IDEA

Select Alibaba Cloud View > Alibaba Cloud ROS in the IntelliJ IDEA window to perform relevant operations according to your needs.

The operation description of the resource stack management function is shown in the following table:

Resources: displays all the resource information in the resource stack

Parameters: displays the parameter information of the resource stack

About Cloud Toolkit

As a free local multi-IDE plug-in that integrates development, testing, diagnostics and deployment, Cloud Toolkit helps developers realize one-click R & D deployment of any server or common tools such as ECS, EDAS, Kubernetes, SAE, functional computing, and supports Java protocol, efficient execution of terminal commands and SQL, increasing R & D speed by more than 8 times and significantly reducing R & D cost.

The product is completely free and covers different IDE environments such as IntelliJ IDEA, Eclipse, Pycharm, Maven, VS Code and so on. Continuous update + community support to ensure that developers rest assured to use, so that the R & D team can reduce cost and improve efficiency.

After reading the above, do you have any further understanding of how to easily implement new ways of orchestrating resources through ROS? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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