Openstack computing host installation and configuration process
1. Environment configuration
Hosts configuration modify the / etc/hosts file and add wtcontroller, wtcompute1 and wtcompute2:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost ...
Posted on Mon, 06 Apr 2020 08:53:20 -0700 by Toboe
Environment: k8s cluster with kubeadm mode not
1. Check the versions of kubeadm, kubelet and kubectl installed in the source system
[root@k8s-3 ~]# yum list kubeadm kubelet kubectl
//Loaded plug-in: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.nju.edu.cn
* epel: ftp.riken.jp
* extras: mirrors.nju.edu.c ...
Posted on Mon, 06 Apr 2020 01:00:14 -0700 by ldmccla
Liang Xu has written a Shell script in his work. This script can obtain time from four NTP servers in turn, and then set the most reliable time to system time.
Because we have a high demand for time, we need to get the right time in a short time. So we need to test the running time of this script to see how long it will take from the start to t ...
Posted on Sun, 05 Apr 2020 21:35:52 -0700 by maGGot_H
 . learn Linux operation and maintenance from the old boy: Web Cluster practice, old boy
Number of worker processes optimizing Nginx service
The configuration parameters of the Nginx service corresponding to the optimized Nginx process are as follows
Worker? Processes 1;? Sp ...
Posted on Sun, 05 Apr 2020 12:20:15 -0700 by nelson201
When a friend mentioned this, he tried to make a record for later.
Installation environment: CentOS release 6.5 (Final) 64 bit
1. Install a jdk first, taking jdk 9 as an example
[root@local opt]# ls
[root@local opt]# tar zxvf jdk-9.0.4_linux-x64_bin.tar.gz
[root@local opt]# ls
Posted on Sat, 04 Apr 2020 07:31:09 -0700 by jj33
The kube-proxy component is to provide endpoint services for pod applications within a cluster. When we define an svc for a pod, the kube-proxy automatically generates a mapping relationship between the pod and the svc and proxies it to the cluster or hosts.
1 Installation preparation
Specific note: All operations here are performed on ...
Posted on Sat, 04 Apr 2020 02:00:08 -0700 by jakeruston
I / O stream
File read write [^ 1]
I / O stream
I / O class derivation
Standard flow object
Standard input stream: cin -- connected to standard input device, istream object
Standard output stream: cout -- connected to standard output device, ostream objectcerr -- connected to standard error output device (no buf ...
Posted on Sat, 04 Apr 2020 01:54:31 -0700 by fallen00sniper
The linux environment uses ping command + timestamp to record in the file
In the production environment, whether the network is stable (network delay) is a very important index. In order to check the network delay conveniently, we can realize long-term network monitoring by ping command.
1, Use of ping command
1. Common parameters
-i: The int ...
Posted on Fri, 03 Apr 2020 10:19:19 -0700 by Coruba67
Introduction to Goang Quick Start -go Language
golang Quick Start [2.1]-go Language Development Environment Configuration-windows
golang Quick Start [2.2]-go Language Development Environment Configuration-macOS
golang Quick Start [2.3]-go Language Development Environment Configuration-linux
golang Quick Start -go helloworld
Posted on Fri, 03 Apr 2020 01:11:26 -0700 by scarface222
Spring Boot 2.0 provides many new features, among which there is a small colored egg: dynamic Banner. Today we'll try this one first.
To use Spring Boot 2.0, you first need to replace the project dependency package with the newly released 2.0 RELEASE. Now the website https://start.spring.io/ als ...
Posted on Fri, 03 Apr 2020 00:48:18 -0700 by jbbadaz