simpleapp.yaml from labs 3 & 5
Comments
-
Hi,
I think that learning to create and troubleshoot yaml files is a major part of learning Kubernetes.
Most yaml files needed to complete the labs are part of the downloadable examples package.
However, simpleapp.yaml is not, because it is a file that is created by each student in lab 3.1, then re-used later in other labs.
To help with yaml file whitespacing and field alignment troubleshooting, you can usekubectl explain deployment --recursive
It will produce an output of all the possible fields in a deployment yaml file. You can compare it with your simpleapp.yaml and hopefully be able to troubleshoot the whitespacing or the fields alignment in it.
A good source of sample yaml files is kubernetes.io.
Before pasting yaml content from pdf to vim, paste it into a simple text editor (I use gedit) and fix the whitespacing and only then paste it into vim. Will save you some time and headache.Regards,
-Chris0 -
As I mentioned, I copy/pasted from the PDF as well as manually typed in the changes to the yaml file, which suggests to me that the PDF is incorrect. The other forum entries suggest that I'm not the only one with this issue. Yaml file attachment? Git diff? Maybe a gist? Something?
0 -
Hi,
Most issues with yaml files are whitespace related. Considering that the first created simpleapp.yaml file is correct, deleting a few lines would not alter the whitespacing of the file. Paying attention to whitespacing will be important when adding blocks of code to the yaml file - but only the whitespacing of the new block, not the already existing yaml code.
Kubernetes yaml files have a similar structure, regardless of the defined resource. Take a look thru the course and the official documentation to discover the structure similarities in order to understand the whitespacing and indentation rules. Also, do not use tab for indentation, use the space bar - two spaces for each indentation.
When I completed these labs I did not find any git repo that supported them. However, I did spend some time researching yaml in particular, to understand its overall structure and usage, even outside of Kubernetes.
Where you able to try the "kubectl explain" command? Did it provide any help?
Regards,
-Chris
0 -
Hello,
A copy and paste from a PDF can sometimes lead to issues, but these are often with the way single quotes are transfered. They become a back-quote. Other characters can be inserted which can cause issues. YAML is sensitive and requires only whitespace.
The first thing to try is to run cat -vet <file>.yaml This will show non-printable characters which may be causing an issue.
There is a tarball of yaml files which you can download via a wget mentioned in lab 3 overview section. Using find ~ -name <file>.yaml you can find the particular YAML file and either copy to the home directory or use the diff command to determine what is different from that file to yours.
The third option is to use is https://www.json2yaml.com/ which allows you to paste and edit the YAML while seeing the JSON be generated as you type. This can be useful to find the proper number of spaces if it is unclear.
Regards,
0
Categories
- 10.1K All Categories
- 35 LFX Mentorship
- 88 LFX Mentorship: Linux Kernel
- 504 Linux Foundation Boot Camps
- 279 Cloud Engineer Boot Camp
- 103 Advanced Cloud Engineer Boot Camp
- 48 DevOps Engineer Boot Camp
- 41 Cloud Native Developer Boot Camp
- 2 Express Training Courses
- 2 Express Courses - Discussion Forum
- 1.8K Training Courses
- 17 LFC110 Class Forum
- 5 LFC131 Class Forum
- 20 LFD102 Class Forum
- 148 LFD103 Class Forum
- 13 LFD121 Class Forum
- 61 LFD201 Class Forum
- LFD210 Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- 23 LFD254 Class Forum
- 569 LFD259 Class Forum
- 100 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 1 LFS145 Class Forum
- 23 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 1 LFS203 Class Forum
- 45 LFS207 Class Forum
- 298 LFS211 Class Forum
- 53 LFS216 Class Forum
- 46 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 10 LFS244 Class Forum
- 27 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- 131 LFS253 Class Forum
- 998 LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 87 LFS260 Class Forum
- 126 LFS261 Class Forum
- 31 LFS262 Class Forum
- 79 LFS263 Class Forum
- 15 LFS264 Class Forum
- 10 LFS266 Class Forum
- 17 LFS267 Class Forum
- 17 LFS268 Class Forum
- 21 LFS269 Class Forum
- 200 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- 212 LFW211 Class Forum
- 154 LFW212 Class Forum
- 899 Hardware
- 217 Drivers
- 74 I/O Devices
- 44 Monitors
- 115 Multimedia
- 208 Networking
- 101 Printers & Scanners
- 85 Storage
- 749 Linux Distributions
- 88 Debian
- 64 Fedora
- 14 Linux Mint
- 13 Mageia
- 24 openSUSE
- 133 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 355 Ubuntu
- 473 Linux System Administration
- 38 Cloud Computing
- 69 Command Line/Scripting
- Github systems admin projects
- 94 Linux Security
- 77 Network Management
- 108 System Management
- 49 Web Management
- 63 Mobile Computing
- 22 Android
- 27 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 528 Off Topic
- 127 Introductions
- 213 Small Talk
- 20 Study Material
- 795 Programming and Development
- 263 Kernel Development
- 498 Software Development
- 923 Software
- 258 Applications
- 182 Command Line
- 2 Compiling/Installing
- 76 Games
- 316 Installation
- 54 All In Program
- 54 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)