DEVNET Introduction to Git. Ashley Roach Principal Engineer Evangelist

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2 DEVNET-1080 Introduction to Git Ashley Roach Principal Engineer Evangelist

3 Cisco Spark How Questions? Use Cisco Spark to communicate with the speaker after the session 1. Find this session in the Cisco Live Mobile App 2. Click Join the Discussion 3. Install Spark or go directly to the space 4. Enter messages/questions in the space cs.co/ciscolivebot#devnet Cisco and/or its affiliates. All rights reserved. Cisco Public

4 Agenda Introduction Quick overview of Git Workshop Resources

5 WHY ARE WE HERE? It s kindof like: - Snapshots of VMs - Incremental backups of files - Wiki versioning When you make a mistake or want to do some experimenting, you can do that in a safe way DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 7

6 Why version control? To Protect yourself and others

7 What does this have to do with Networking or Data Center?

8 NetDevOps CICD Pipeline Demonstration Create Proposed Branch Update Configuration Test Configuration Push Proposed Changes Send Notification Deploy Changes and Test Build Test Network Build Automation Starts Automated Pipeline Credit: Hank Preston DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 10

9 See also DEVNET-2203 Build a Network Configuration CICD Pipeline (Thurs, Feb 1, 0900 DEVNET-1725 How to Be a Network Engineer in a Programmable Age (Tues, Jan 30, 1300) DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 11

10 Git vs. GitHub Git is an open source distributed version control system / technology GitHub is a commercial company, that runs GitHub.com based on Git VCS DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 12

11 Git: Technical Overview

12 DISTRIBUTED VERSION CONTROL Opens up to new workflows: git flow Each system has an exact replica of the repo as other collaborators. DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 14

13 Under the hood Changes are stored in trees Trees contain changed files Commits contain trees DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 15

14 Getting Started with Git Starting from GitHub (screenshot flow of new project) Starting from your workstation (git init) DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 16

15 Getting Started with CLI: GIT CONFIG So you can be held accountable, configure git $ git config --global user.name "Your Name Comes Here" $ git config --global user. DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 17

16 Getting Started: Cloning Projects No password Set up SSH key on remote server (e.g. ssh-keygen) $ git clone $ git clone DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 18

17 Getting Started: Local Repository DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 19

18 What s inside.git? DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 20

19 DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 22

20 GIT ADD Add any files in your repository to git stage $ git add. 24 DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public

21 STAGING AREA Hat DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 25

22 GIT COMMIT Store your changes into a commit Saves all of your changes together / save point Commit does NOT push $ git commit m Initial commit DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 26

23 Git Log: History of commits DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 27

24 BRANCHING: Your safe place Makes a pointer to your code Moves HEAD around $ git branch <name> $ git branch testing $ git commit m new $ git checkout master DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 28

25 MERGING git merge <topic> You must be on the branch you want to merge INTO when you execute this command (e.g. master) $ git merge <branch> DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 29

26 GOING BACKWARDS Generate a new commit that undoes all of the changes introduced in <commit>, then apply it to the current branch. $ git revert <commit> DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 30

27 SHARE YOUR CHANGES git push <destination> <branch> git push origin master $ git remote add <name> <url> $ git push <name> <branch> $ git push origin master DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 31

28 GIT CLIENTS CLI Client IDE Clients VIM: airblade/vim-gitgutter Emacs: magit GUI Clients SourceTree Git Kracken DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 32

29 DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 35

30 DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 36

31 Come find me after today I ll be waiting Ashley Cisco DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 37

32 Cisco Spark How Questions? Use Cisco Spark to communicate with the speaker after the session 1. Find this session in the Cisco Live Mobile App 2. Click Join the Discussion 3. Install Spark or go directly to the space 4. Enter messages/questions in the space cs.co/ciscolivebot#devnet Cisco and/or its affiliates. All rights reserved. Cisco Public

33 Please complete your Online Session Evaluations after each session Complete 4 Session Evaluations & the Overall Conference Evaluation (available from Thursday) to receive your Cisco Live T-shirt All surveys can be completed via the Cisco Live Mobile App or the Communication Stations Complete Your Online Session Evaluation Don t forget: Cisco Live sessions will be available for viewing on-demand after the event at Cisco and/or its affiliates. All rights reserved. Cisco Public

34 Continue Your Education Demos in the Cisco campus Walk-in Self-Paced Labs Tech Circle Meet the Engineer 1:1 meetings Related sessions DEVNET Cisco and/or its affiliates. All rights reserved. Cisco Public 40

35 Thank you

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