HeartBeat (NFS file mount for Web service hot standby)

The two hosts are backup to each other, and the Web service displays the resources on the NFS file system. Add a Linux 6.8 system as an NFS file server catalog: 1. Complete the basic configuration of HeartBeat 2. Configure server for NFS 3. Configure HeartBeat resource management server to use NFS resources 4. Result test 1. Complete the b ...

Posted on Tue, 26 May 2020 11:20:35 -0400 by steadyguy

OLAP query engine, ClickHouse cluster management

1, Introduction to column Library ClickHouse is an open-source column storage database (DBMS) of Yandex company in Russia in 2016, which is mainly used for OLAP online analysis and processing queries, and can generate analysis data reports in real time using SQL queries. Columnar storage For row storage and column storage, the organization st ...

Posted on Thu, 21 May 2020 00:54:06 -0400 by skeener

ntp time server

I. Environmental Preparation Two virtual machines 192.168.30.139 #Server 192.168.30.143 #Client 2. Server side configuration: 1. Install ntp service # 192.168.30.139 [root@hadoop1 opt]# yum install -y ntp # 192.168.30.143 [root@hadoop2 opt]# yum install -y ntp 2. Service and Set Up Startup [root@hadoop1 opt]# service nt ...

Posted on Wed, 13 May 2020 12:21:19 -0400 by infratl

Kubedm builds kubernetes cluster environment

demand Kubedm builds kubernetes cluster environment Preparation conditions Three VPS (Alibaba cloud HK - centos7.7 is used in this paper) A local computer capable of SSH connection to VPS Installation procedure Before installation, you need to configure the domestic image source. Alibaba cloud's image source is recommended here cat <<EO ...

Posted on Mon, 11 May 2020 10:28:08 -0400 by iifs044

Deploy private cloud CloudStack

catalog preface 1. Cluster planning 2. Set yum source 3. Turn off the firewall and selinux 4. Install nfs 4.1.192.168.0.232 4.2.192.168.0.233 5. Install and start MySQL server 6. Install and start cloudstack management 7. Browser access preface The infrastructure cloud formed by CloudStack and Data center Operators can quickly and easil ...

Posted on Sun, 10 May 2020 23:56:54 -0400 by johnpaine

Ansible deployment source code nginx

Divide all deployed nginx hosts into nginx groups: vim /etc/ansible/hosts [nginx] 192.168.200.102 • create management directory: mkdir -p nginx/roles/nginx_install/{files,handlers,meta,tasks,templates,vars} cd nginx/ explain: Files: store source files and configuration files that need to be synchronized to remote servers; handlers: the ...

Posted on Sun, 10 May 2020 10:28:18 -0400 by Andy17

Android P HIDL demo code writing (original)

Previous articles have analyzed the registration and invocation of HIDL service, and this article summarizes how to write the next HIDL service. Abbreviated HAL file First of all, you need to confirm the package name of the folder and interface, because this is related to the use of script to generate some code. Generally, it is placed in the h ...

Posted on Thu, 07 May 2020 07:08:55 -0400 by Ph0enix

One of the three stages: Architecture introduction and environment deployment

1, Architecture introduction and environment deployment (1) Understand the composition of cluster architecture servers Basic architecture composition: (for user access) 1. Front end services: 1) Customer user Is a visitor who requests to visit the website page 2) Security - firewall equipment Policy control shall be carried out for users access ...

Posted on Mon, 04 May 2020 15:55:33 -0400 by atrum

iRedMail installation And FAQ

iRedMail installation And FAQ In order to get close to the actual environment, we use CentOS 7V / iRedMail 1.2V for installation. Download address: https://www.iredmail.org/ At the same time, in order to make your installation correct or in line with your favorite environment, it is recommended to install virtualbox locally, test, debug and i ...

Posted on Mon, 27 Apr 2020 00:05:32 -0400 by kopytko

Linux Kernel Firewall Selinux

Status view and modification of selinux getenforce ###View Status setenforce 0|1 ###0:permissive warning mode 1:enforcing forced mode vim /etc/sysconfig/selinux SELINUX= enforcing ###Force mode ...

Posted on Tue, 21 Apr 2020 13:06:04 -0400 by casey_00