Programming VIP

Introduction to PodmanWhat is Podman?Podman is an open source container runtime project that can be used on most Linux platforms. Podman provides functions very similar to Docker. As mentioned earlier, it does not need to run any daemons on your system, and it can also run without root privileges.Podman can manage and run any container and cont ...

Signal set overview A user process often needs to process multiple signals. In order to facilitate the processing of multiple signals, signal set is introduced into linux system. Signal set is used to represent the data type of multiple signals Signal set data type sigset_t Define path /usr/include/x86_64-linux-gnu/bits/sigset.h(Ubuntu 16. ...

Today, I'm going to build an OpenCV environment on my notebook Ubuntu 20.04. The recording process is as follows. 1. Start 1.1 installing dependent Libraries # Install, compile, download and other tools # Build essential is used to download gcc, g + + and other compilation tool chains sudo apt-get install build-essential cmake git pkg-config ...

The software download link is at the bottom thank: CSDN Daniel: Travel through IT bilibili Daniel: amoscloud2013 1. Preliminary preparation Five 8G virtual machines are CDH1, cdh2, cdh3, CDH4 and cdh5 respectively. JDK is installed on all virtual machines 2. Modify IP and host name Select CentOS 7 for cluster deployment. All three vir ...

Resource scheduling (nodeSelector, nodeAffinity, tail, Tolrations) 1.nodeSelector nodeSelector is the simplest way to constrain. nodeSelector is pod A field of the spec Use -- show labels to view the labels of the specified node [root@master haproxy]# kubectl get node node1 --show-labels NAME STATUS ROLES AGE VERSION LABEL ...

https certificate Why use HTTPS because HTTP Unsafe when we use http The website will be hijacked and tampered with if used https Protocol, then the data is encrypted in the transmission process, so hackers can not steal or tamper with the data message information, but also avoid information leakage during website transmissio ...

roles role Role is a new feature introduced by ansible since version 1.2. It is used to organize playbooks hierarchically and structurally. Roles can automatically load variable files, tasks and handlers according to the hierarchical structure. To use roles, you only need to use the include instruction in the playbook. In short, roles is a mec ...

socket IPC    socket API was originally designed for network communication, but later developed an IPC mechanism based on the socket framework, namely UNIX Domain Socket. Although the network socket can also be used for interprocess communication of the same host (through loopback address 127.0.0.1), but UNIX Domain Socket is mor ...

brief introduction Ansible Galaxy (official website: https://galaxy.ansible.com )Is a public repository of ansible content written by many ansible administrators and users. It contains thousands of Ansible roles and has a searchable database to help Ansible users identify roles that may help them complete management tasks Ansible Galaxy con ...

Module overview [Unit] section It mainly describes the description, content, document introduction and some dependent service definitions of the service Description: description informationAfter: indicates the services that need to be relied on, and the function determines the start orderBefore: indicates the dependent serviceRequles: other ...