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Install K8S on VM and spring boot integration.

Installation Environment Vmware Workstation pro  It is recommended to use the  snapshot  to store the state of each installation stage to avoid installation failures and causing the installation to start from scratch. Ubuntu 22.04 windows 11 Hardware settings  create 3 VM: 4 cores and 4G memory and 100G capacity Before installing K8s (All use the root user) set host: 192.168.47.135 master 192.168.47.131 node1 192.168.47.132 node2 set root ssh connection: sudo su - echo "PermitRootLogin yes" >> /etc/ssh/sshd_config systemctl restart sshd sudo passwd ssh-keygen for i in {master,node1,node2}; do  ssh-copy-id root@$i; done set Ipvs and conf  create conf file: for i in {master,node1,node2}; do ssh root@$i 'cat << EOF > /etc/modules-load.d/containerd.conf overlay br_netfilter EOF'; done execute conf: for i in {master,node1,node2}; do ssh root@$i 'modprobe overlay;modprobe br_netfilter;'; done create 99-kubernetes-cri.conf file: for i in {maste...
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Program design template

Designing programs is a common job for every engineer, so templates help simplify the job of designing each program.

Update History

Let everyone know the latest version and update information.

background

Write down why we need this program and what is the background for building this program.

Target

Target functionality

The goal of the program, what function to achieve, the main module and submodule, and these modules' relationship.

Target performance

Specific benchmarks such as QPS or milliseconds to evaluate programs.

Target architecture

Stability.
Readability.
Maintainability.
Extendability.
...

Others Target

Overall design

Design principles and thinking

Explain how and why the program was designed.

Overall architecture

An overall architectural picture.

Dependency

Module dependencies on other modules or programs.

Detail design

Program flow design

Program flow design diagram.

API design

The details of the API, and how to interact with the frontend or backend or modules.

Database design

Concrete SQL syntax.

Implement detail

Explain details not included in the overall design diagram or flowchart.

Compatible design.

Compatible design explanation

Compatible versions between modules, especially whether the client version and server version are compatible.

version dependency

List all version dependencies.

Event Tracking Design

Implementation of program event tracking, how it is collected, and benefits.

Test

The test range

Describe the scope of testing, how many modules, and whether stress testing or stability testing is required.

Test plan

Concrete test cases, including different environments and each test step.

performance test

Test programs under high pressure with large volumes of requests or data.

Online Planning and Risk Assessment

Online Planning

The online version and upgrade steps.

Risk Assessment

If there is a problem with the upgrade, how to deal with it or what are the overall rollback steps.

Unsolved problems

Leaves unsolved or needs discussion questions here.

Schedule and Manpower

attachments

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Install K8S on VM and spring boot integration.

Installation Environment Vmware Workstation pro  It is recommended to use the  snapshot  to store the state of each installation stage to avoid installation failures and causing the installation to start from scratch. Ubuntu 22.04 windows 11 Hardware settings  create 3 VM: 4 cores and 4G memory and 100G capacity Before installing K8s (All use the root user) set host: 192.168.47.135 master 192.168.47.131 node1 192.168.47.132 node2 set root ssh connection: sudo su - echo "PermitRootLogin yes" >> /etc/ssh/sshd_config systemctl restart sshd sudo passwd ssh-keygen for i in {master,node1,node2}; do  ssh-copy-id root@$i; done set Ipvs and conf  create conf file: for i in {master,node1,node2}; do ssh root@$i 'cat << EOF > /etc/modules-load.d/containerd.conf overlay br_netfilter EOF'; done execute conf: for i in {master,node1,node2}; do ssh root@$i 'modprobe overlay;modprobe br_netfilter;'; done create 99-kubernetes-cri.conf file: for i in {maste...
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ShardingSphere

Table of contents [ hide ]  ShardingSphere The distributed SQL transaction & query engine for data sharding, scaling, encryption, and more - on any database. ShardingJDBC ShardingSphere-JDBC is a lightweight Java framework that provides additional services at Java’s JDBC layer. ShardingProxy ShardingSphere-Proxy is a transparent database proxy, providing a database server that encapsulates database binary protocol to support heterogeneous languages. Core Concept 1. Virtual Database Provides a virtual database with sharding capabilities, allowing applications to be easily used as a single database 2. Real Database The database that stores real data in the shardingShereDatasource instance for use by ShardingSphere 3. Logic Table Tables used by the application 4. Real Table In the table that stores real data, the data structure is the same as the logical table. The application maintains the mapping between the logical table and the real table. All real tables map to ShardingS...
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Kafka

Table of contents [ hide ] Kafka Apache Kafka is an open-source distributed event streaming platform used by thousands of companies for high-performance data pipelines, streaming analytics, data integration, and mission-critical applications. Why use a Message Queue like Kafka 1. Asynchronous The program can continue execution without waiting for I/O to complete, increasing throughput. 2. Decoupling It refers to reducing the dependencies between different parts of the system so that each component of the system can be developed, maintained, and evolved relatively independently. The main goal of decoupling is to reduce tight coupling between components to improve system flexibility, maintainability, and scalability. 3. Peak clipping Peak clipping is essential to delay user requests more, filter user access needs layer by layer, and follow the principle of "the number of requests that ultimately land on the database is as small as possible". Basic Concept 1. Client Includi...
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