Programmer Think

Flannel is an open-source CNI network plug-in of cereos. The figure below shows a schematic diagram of a data package provided by flannel official website after packet, transmission and unpacking. From this picture, we can see that the docker0 of two machines are in different segments: 10.1.20.1/24 and 10.1.15.1/24. If you connect the Backend S ...

Named access control list can adjust the policy flexibly, provided that on the basis of standard access list and extended access list, no+ACL number can be used to delete the policy, or ACL number + permit+ip can be used to append the ACL policy. Experimental environment One two-layer switch A three-layer switch Four PCs Experimental requi ...

Update the second encapsulation of axios according to the common business scenarios under vue project after one year Function realization:1. Compatible with ie browser to avoid caching2. Reduce or update duplicate requests3. Interface domain name usage environment variable4. Global loading status5. Global error alerts that can be turned off6. G ...

Practice of establishing named ACL The topology of this experiment is as follows: Experimental purpose To complete the establishment of named ACL on sw-3 route, the experimental requirements are as follows: Allow PC2 host in vlan10 to access PC4; Deny other hosts in VLAN 10 to access PC4; Allow other network hosts to access PC4. Experimenta ...

Three ways to save canvas to local pictures canvas saves local pictures The first method (modifying the media type of the picture, window.open download directly) The second method (create a tag and download it by triggering clicks on it) The third method (converting image data into Blob data to save ...

Now the network is still very messy, especially full of all kinds of **, **, and ** related content, it is obvious that this is not in accordance with our country's law, so in order to a product can live a long and healthy life, it is better to use a certain strategy to filter or remind users not to send such content. But it's easier said than ...

Packet sticking and unpacking are inevitable in TCP network programming. Whether the server or the client, when we read or send messages, we need to consider the underlying TCP packet sticking/unpacking mechanism. TCP sticking and unpacking TCP is a "flow" protocol. The so-called stream is a string of data without boundaries. The ...

1. Vim automatically adds annotations and intelligently changes lines #vi ~/.vimrc set autoindent set tabstop=4 set shiftwidth=4 function AddTitle() call setline(1,"#!/bin/bash") call append(1,"#====================================================") call append(2,"# Author: lizhenliang") call append(3,"# Create Date: " . strftime("%Y-%m-%d")) ...

In Android, threads are divided into main threads and sub-threads. The main interface is used to interact with users and perform UI-related operations, while sub-threads are responsible for time-consuming operations. If time-consuming operations are performed in the main thread, the program will not be able to respond in time. Therefore, time-c ...

I. overview 1.1 Thread and Process Differences Performance issues caused by 1.2 multithreading 2. Multithread Creation 2.1 First type - inheritance of Thread class 2.2 the second way to implement the Runnable interface 2.3 Third Kind - Implementing Callable Interface 2.4 Common Thread Constructors 2.5 Is it better to inherit ...