Programmer Group

We connect Linux to implement regular expressions 1. Python3 Regular Expressions Regular expressions are a special sequence of characters that help you easily check if a string matches a pattern. Python has added the re module since version 1.5 to provide Perl-style regular expression patterns. The re module gives the Python language full ...

Common replication sets The common architecture of online environment is replica set, which can be understood as one master and many slaves. Below: 1 master and 2 slave Below: one master one slave one arbitration Server information: Three machines are configured with 2-core 16G memory storage disk 100G "host" : "10.1.1.159:27020""host" : "1 ...

First of all, it introduces some important concepts in this paper: Function calculation: function calculation is an event driven service. Through function calculation, users do not need to manage the operation of the server, just write code and upload. Function computing prepares computing resources and runs user code in an elastic and scalab ...

Previous picture FATAL Error: listen EADDRNOTAVAIL 123.57.251.57:5601 The configuration file is configured as follows: [root@head-kib ~]# cd /usr/local/kibana-6.5.4-linux-x86_64/config/ [root@head-kib config]# vim kibana.yml server.port: 5601 server.host: "123.57.251.57" elasticsearch.url: "http://192.168.246.234:9200 "ාes node kibana.in ...

1. View the existing nginx compilation parameters I'm here with 1.16.0 Upgrade to 1 for example.16.1(Compiled and installed) [root@localhost ~]# /usr/local/nginx/sbin/nginx -V nginx version: nginx/1.16.0 built by gcc 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) built with OpenSSL 1.0.2k-fips 26 Jan 2017 TLS SNI support enabled configure arg ...

Catalog 1. Deployment list of Intranet resources of kubernetesubernetes 2. Configure dns resolution 3. Browser visit k8s-yaml.od.com 4. Download docker image and upload it to harbor warehouse 5. Prepare resource allocation list 6. Application resource allocation 7. Check the created resources 8. Verify coreDNS 1. Deployment list of Intranet ...

1, Deploy Rabbitmq clusterRabbitmq cluster can be divided into two ways:1. Normal mode: the default cluster mode. The message body only exists on one node;2. Mirror mode: make the required queue into a mirror, which exists in multiple nodes.ha-mode:  all: queue to all nodes; exatly: randomly mirror to other nodes; nodes: mirror to the speci ...

1, Fundamentals Here, "copy on write" is enclosed with a quotation mark, because this is specifically for the copy on write effect when rsync backup is used, rather than the actual copy on write effect. Its purpose is as follows: After backing up the data using rsync, create a snapshot immediately: The data state of the snapsh ...

Run the program, because of memory problems or other blabla blabla problems (not code problems altogether), the program may hang up occasionally, and we can't stare at the program all day. What can we do?It's a good idea to write a script to check if the program hangs up and restart if it does, depending on the operat ...

Because the project needs to apply for a new server, it is necessary to reconfigure the environment. nginx installation: One click installation of four dependencies: yum -y install gcc zlib zlib-devel pcre-devel openssl openssl-devel   Enter / usr/local/src directory and create nginx folder cd /usr/local/src mkdir nginx   Enter the nginx ...