Programmer Group

1, Details of common parametersThis paper is about https://blog.51cto.com/8355320/2471354 The parameter configuration of is extended.The default configuration file of ansible is / etc/ansible/ansible.cfg. Parameters of ansible can be adjusted in the configuration file, including concurrent thread, user, module path, configuration optimization, ...

**System Configuration** ** Specification: ** 1vCPUs | 2GB | s6.medium.2 ** Mirror: ** Ubuntu 18.04 server 64bit **User: ** Create a halo user on Ubuntu Preparatory software: 1 Hadoop installation package (recommended cdh, cloudera site) 2 Java 1.8 +3 ssh 1. Install Java Download the Linux version of JDK jdk-8u161-linux-x64.tar.gz first Un ...

Ansible's specified user and password login, secret-free login, specified ssh port, and host list Inventory configuration It is not necessary to modify the ansible configuration in practice, or it is only necessary to modify the ansible configuration. Add user account Explain: 1. Login accounts used by operations and maintenance personnel; 2 ...

After moving the hadoop cluster on the local virtual machine to Baidu cloud server, I found that there are always many unknown ip addresses logging in to my server, because the firewall is closed locally, but in the actual deployment, this is too unsafe. So I spent two hours setting up the firewall of t ...

Preface Domain name from 2020 to the end of February mflyyou.cn After a three-year renewal, it only expires in 2024-4, so Google decided to build a personal website. Google changed one of its favorite themes, hexo matery modified, and then changed its content. Please observe the specific effect of Blog Zhang Panqin's blog Outline of this artic ...

Because of the epidemic, Alibaba cloud has sent half a year's servers free of charge, and they can't be used for playing. Then I will first migrate my blog from github to Alibaba cloud, and then change it if there is a problem. Previous conditions: 1. Server 2. hexo has been installed on the local com ...

There are too many photos at home. I found a lot of software, which can't achieve the desired effect of viewing pictures. Now I share a PHP family album program built on raspberry pie, which can be viewed by folders, calendars, keywords, and full screen slide show. I believe that many students are the s ...

I really don't understand this: Basis: http : //www.madboa.com/geek/openssl/#key-rsa , you can generate a public key from the private key. openssl genrsa -out mykey.pem 1024 openssl rsa -in mykey.pem -pubout > mykey.pub My initial idea was that they were generated together. Does the RSA private key contain the sum? Or public key? ...

At present, MHA (Master High Availability) is a relatively mature solution in the aspect of MySQL high availability. In the process of MySQL failover, MHA can automatically complete the database failover operation within 0-30 seconds, and in the process of failover, MHA can guarantee the consistency of data to the greatest extent, so as to ach ...

Gitlab is an open source application developed using Ruby on Rails that implements a Git project repository that can be accessed through a Web interface from public or private projects Gitlab has similar capabilities as Github to browse source code, manage bugs and comments.Can manage team access to the repository, he is very easy to browse su ...