Programmer Think

Docker summary Docker is an open source and lightweight container engine, which mainly runs on Linux and Windows and is used to create, manage and arrange containers. Compared with VMware virtual machine, Docker uses container to host applications instead of operating system, so it has little overhead and high performance. However, Docker's iso ...

Articles in CSDN may not be updated in time. Please follow my blog to check the latest version: Xu Sheng's blog reference resources: https://andrewlock.net/caching-docker-layers-on-serverless-build-hosts-with-multi-stage-builds—target,-and—cache-from/ https://docs.gitlab.com/ee/ci/docker/using_docker_build.html#make-docker-in-docker-builds- ...

preface yum is a Shell front-end package manager in Fedora, RedHat and SUSE. Based on RPM package management, it can automatically download and install RPM packages from the specified server, automatically handle dependencies, and install all dependent software packages at one time without tedious downloading and installation. We usually u ...

preface Automated operation and maintenance tool ansible 1, ansible introduction    ansible is a lightweight automatic operation and maintenance management tool developed based on python. It integrates the advantages of many operation and maintenance tools (saltstack, chef and puppet). It can be used to execute command ...

1. Possible means of implementation Execute under linux Method of sh file The. sh file is a text file. If you want to execute it, you need to use Chmod a + X XXX sh to give executable permissions. 2. Beginning: #/ bin/sh shell programs must start with "#! / bin/sh". shell # generally means annotation, so it is often thought that &q ...

preface HTTP interface testing is very simple. No matter tools, frameworks or platforms, as long as a few good points are good tools. Test data problems: for example, deleting interfaces and repeated execution can keep the results consistent. Data initialization must be done.Interface dependency: interface B depends on the return value of int ...

1. nginx service nginx is a high performance, lightweight web service software. nginx has high stability, low system resource consumption, and high processing power for HTTP concurrent connections. A single physical server can support 30,000 to 50,000 concurrent requests. 2. Compile and install nginx service 1. Preparing the installatio ...

preparation Firstly, the UserDetailsService interface needs to be implemented to complete the loading of users; Note that the password here needs to be encrypted. If the database is plaintext, it needs to be encrypted and set later Furthermore, a UserDetails interface needs to be implemented to complete the external output of user informa ...

1. Introduction to spin lock Spin lock will be used in both kernel programming and application layer programming; Spinlock is similar to mutex. Instead of blocking the process through sleep, it is always in a busy state (also known as spin) before obtaining the lock. Spin locks can be used when the lock is held for a short time and the thread ...

The application or kernel runs in the virtual memory space. After kernel {startup, if a virtual address wants to access the physical memory, it needs to perform address translation through the CPU MMU hardware. The logical process of accessing the physical memory by the whole virtual address is as follows: After kernel # startup, the appli ...