Programmer Group

Use Grafana and Prometheus to monitor the performance of Linux server, mainly through node_ The exporter monitors, such as CPU, memory, disk, etc. Prometheus collects data from remote machines through HTTP protocol and stores Prometheus local timing database. Install startup node_exporterNode needs to be installed on the monitored server_ exp ...

preface Recently, I was doing monitoring related supporting facilities, and found that many scripts are based on python. I heard a long time ago that its name is short of life. I learned python, which is not a joke. With the rise of artificial intelligence, machine learning and deep learning, most of the AI code on the market is written in Pyt ...

1. Briefly describe the four cluster characteristics and usage scenarios of lvs LVS has three load balancing modes, VS/NAT (nat mode), VS/DR (routing mode), VS/TUN (tunnel mode), VS/FULLNAT 1. NAT mode (VS-NAT) Principle: The destination address of the IP header of a packet sent by a client is replaced by the IP address of one of the RSs on t ...

1. MySQL installation (install using yum) yum install mysql* –y Linux MySQL data is stored in / var/lib/mysql by default/ [root@study ~]# cd /var/lib/mysql/ [root@study mysql]# ll //Total consumption 20488 -rw-rw----. 1 mysql mysql 10485760 5 23 23:55 ibdata1 -rw-rw----. 1 mysql mysql 5242880 5 23 23:55 ib_logfile0 -rw-rw----. 1 mysql mysql 5 ...

preparation in advance Execute yum update openssh to upgrade first. The official upgrade is okay anyway.If you have previously manually compiled an upgrade of openssh, test yourself for changes to the default profile path.) (Unified openssh version 7.4p1 is prepared here before Unified Compile Installation is upgraded to openssh 8.2p1) [root@n ...

We have learned the basic usage of LXC and the simple use of LXC WEB Panel, which can be referred to by interested friends https://www.cnblogs.com/qiuhom-1874/p/12904188.html Today's essay is mainly about the basic knowledge of docker; I. docker and LXC First let's talk about the difference between docker and traditional LXC containers. The tra ...

preface: Last time, I introduced the installation of RabbitMQ under windows and the addition of AMQP extension of PHP. Here, the code of local test is put into the service, so that is to install it again on Linux. But there is no need to use it directly. It is mainly about the use of control console after RabbitMQ is installed and how to call ...

I. Cluster Structure RabbitMQ always records the following four types of internal metadata: Queue metadata: name and properties of the queue (persistent, can be deleted automatically); Exchange metadata: Exchange name, type and properties (persistent, etc.); Binding metadata: A table that records how messages are routed to a queue; Vhost metad ...

rise Fedora's kernel is frequently upgraded.But I found that restarting doesn't use the new kernel.I need to check the GRUB configuration file. ydx@ydx-mf:~ $ cat /etc/default/grub #GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" ...

Catalog ifconfig command Show Network Devices Set up network devices ifconfig command Function description: Display or set up network devices usage ifconfig [interface] [up|down] ifconfig interface options | address ... option option Explain -a Displays the status of all interfaces, including information about inactive interf ...