How do you set up transactional analytics in a microservices set up?

Hey there,

I am looking at setting up a customer facing analytics reporting service that would just be simple queries of stuff we have in our databases. - the issue is we use a microservices setup where each service has it's own db and no other services are allowed to access another's db.

How have folks done this in the past? I know I could invest in some etl tooling and use some common database for reporting but we want to know the lightest weight solution so we can validate this with customers.

Any thoughts?

https://redd.it/ex5jlm
@r_devops

Cloud Decision Process

As a DevOps engineer/developer/department, how have you in the past gone about choosing the cloud computing service you use? There are countless numbers of services out there, but how have you in the past chosen to use AWS/GCP/Azure... or other services such as render farms?

https://redd.it/ex881h
@r_devops

packer single builder but two images

I recently learned packer. I like it. Thanks for this forum for the advise.

I have a template file which builds a ec2 instance. At the end I use an ansible provisioner. It builds the image.

However, I need to build a similar image but with different argument for the provisioner. Do I need to create a new template or is there a way to refer to the builder and build a different image?

https://redd.it/ex62ds
@r_devops

Simplifying AWS Private API Gateway VPC Endpoint Association with Terraform

Recently, I've been contributing to AWS Terraform provider. The lack of documentation on the subject pushed me to write this piece - hopefully, it helps other devs to use Private API Gateway's more easily.

https://link.medium.com/FAydmUGlJ3

https://redd.it/exahat
@r_devops

Go pro CSA

Go pro CSA

After securing the three Associate certifications, the next logical path is to go after the two Professional certs, and the Certified Solutions Architect – Professional, in particular.

CSA – Pro is the absolute pinnace of AWS knowledge, and obtaining this certification is the AWS equivalent of defeating a video game’s final boss.

https://redd.it/ex60jc
@r_devops

Cloud Native Computing for Enterprise

Hey Reddit!
Wrote an article about some of the challenges/talking points for adopting cloud native technologies at an enterprise scale:
[https://medium.com/@lachlan\_white/visualising-a-cloud-native-operating-model-for-enterprise-adoption-b70cc5790d48](https://medium.com/@lachlan_white/visualising-a-cloud-native-operating-model-for-enterprise-adoption-b70cc5790d48)

https://redd.it/ex1907
@r_devops

Octopus variable replacements in JS file isn’t playing nice, adding spaces?

We are using octopus to replace variables in our reactjs environment files. It works awesome, swapping vars for each environment. However, today I added a new var for a true/false and it didn’t play as nice. I noticed Octopus writes it as a string, not a bool, which is fine, but something like

process.env.REACT_APP_FEATURE === ‘true’

Returns false even though I have true in the variable in octo. I finally got it to work by trimming it, adding a .trim(). But my var doesn’t have it in the text editor.

Known issue? Am I doing something weird?

https://redd.it/ewwqyr
@r_devops

Kubernetes and legacy OS components

Hi all,

So the product I work on has had shifting leadership over the years, and previous staff integrated a couple of external components that we really would rather not support anymore. We spend a lot of energy on maintenance of these legacy pieces which also require legacy environments, including operating systems (for sake of discussion, let's assume Windows 7).

Our team is small. No one has DevOps experience but we're all prepared to learn. We would like to move to Kubernetes for all the good things that it does. Based on the reading I've done, it looks like we could:

* run a linux VM to host our containers
* move all of our current components into containers

But if I'm reading correctly, we would not be able to run the legacy components in a container since it requires a legacy Windows OS. Is this accurate? Does anyone have suggestions? The goal is to isolate this component as-is but keep it running until we can eventually replace it and dump it.

https://redd.it/ewvozo
@r_devops

Monthly 'Getting into DevOps' thread - 2020/012

**What is DevOps?**

* [AWS has a great article](https://aws.amazon.com/devops/what-is-devops/) that outlines DevOps as a work environment where development and operations teams are no longer "siloed", but instead work together across the entire application lifecycle -- from development and test to deployment to operations -- and automate processes that historically have been manual and slow.

**Books to Read**

* [The Phoenix Project](https://www.amazon.com/Phoenix-Project-DevOps-Helping-Business/dp/1942788290) - one of the original books to delve into DevOps culture, explained through the story of a fictional company on the brink of failure.
* [The DevOps Handbook](https://www.amazon.com/dp/1942788002) - a practical "sequel" to The Phoenix Project.
* [Google's Site Reliability Engineering](https://landing.google.com/sre/books/) - Google engineers explain how they build, deploy, monitor, and maintain their systems.
* [The Site Reliability Workbook](https://landing.google.com/sre/workbook/toc/) - The practical companion to the Google's Site Reliability Engineering Book
* [The Unicorn Project](https://www.amazon.com/Unicorn-Project-Developers-Disruption-Thriving-ebook/dp/B07QT9QR41) - the "sequel" to The Phoenix Project.
* [DevOps for Dummies](https://www.amazon.com/DevOps-Dummies-Computer-Tech-ebook/dp/B07VXMLK3J/) - don't let the name fool you.

**What Should I Learn?**

* [Emily Wood's essay](https://crate.io/a/infrastructure-as-code-part-one/) - why infrastructure as code is so important into today's world.
* [2019 DevOps Roadmap](https://github.com/kamranahmedse/developer-roadmap#devops-roadmap) - one developer's ideas for which skills are needed in the DevOps world. This roadmap is controversial, as it may be too use-case specific, but serves as a good starting point for what tools are currently in use by companies.
* [This comment by /u/mdaffin](https://www.reddit.com/r/devops/comments/abcyl2/sorry_having_a_midlife_tech_crisis/eczhsu1/) - just remember, DevOps is a mindset to solving problems. It's less about the specific tools you know or the certificates you have, as it is the way you approach problem solving.
* [This comment by /u/jpswade](https://gist.github.com/jpswade/4135841363e72ece8086146bd7bb5d91) - what is DevOps and associated terminology.
* [Roadmap.sh](https://roadmap.sh/devops) - Step by step guide for DevOps or any other Operations Role

Remember: DevOps as a term and as a practice is still in flux, and is more about culture change than it is specific tooling. As such, specific skills and tool-sets are not universal, and recommendations for them should be taken only as suggestions.

**Previous Threads**
https://www.reddit.com/r/devops/comments/ei8x06/monthly_getting_into_devops_thread_202001/

https://www.reddit.com/r/devops/comments/e4pt90/monthly_getting_into_devops_thread_201912/

https://www.reddit.com/r/devops/comments/dq6nrc/monthly_getting_into_devops_thread_201911/

https://www.reddit.com/r/devops/comments/dbusbr/monthly_getting_into_devops_thread_201910/

https://www.reddit.com/r/devops/comments/cydrpv/monthly_getting_into_devops_thread_201909/

https://www.reddit.com/r/devops/comments/ckqdpv/monthly_getting_into_devops_thread_201908/

https://www.reddit.com/r/devops/comments/c7ti5p/monthly_getting_into_devops_thread_201907/

https://www.reddit.com/r/devops/comments/bvqyrw/monthly_getting_into_devops_thread_201906/

https://www.reddit.com/r/devops/comments/blu4oh/monthly_getting_into_devops_thread_201905/

https://www.reddit.com/r/devops/comments/b7yj4m/monthly_getting_into_devops_thread_201904/

https://www.reddit.com/r/devops/comments/axcebk/monthly_getting_into_devops_thread/

**Please keep this on topic (as a reference for those new to devops).**

https://redd.it/exfyhk
@r_devops

Consulting on cloud architecture optimization?

As a company looking to optimize our cloud computing systems (AWS services or such) how much would we expect to pay a Cloud Solutions Architects or other professionals hourly? Are there good software out there doing this?

https://redd.it/exgt0d
@r_devops

How to interpret various memory statistics? Cold, hot, rss, cache, swap, etc.

So I set some logging environment, its mostly based on Grafana with Prometheus and CAdvisor for Docker container monitoring.

While these tools are very cool and easy to setup, I am confused about memory consumption they represent.

Right now it shows that my Prometheus instance uses almost 4.39GB of ram, what the...

I made further investigations which and the 4.39GB is the result of call to a total memory usage, which **seems to** be built from something that some people calls a cold memory:

* mapped\_file (26MB)
* rss (2680MB)
* cache (1700MB)
* swap (0MB)

And the hot memory metrics:

* working set (270MB)

I don't really understand how flexible the cold memory is and how the resources taken by cold memory would be cut if any other linux process would suddenly burst in ram usage.

Let's imagine the scenario where other process starts heavy operations and takes significant amount of server's ram, what would happen with these cold / hot resources mentioned above? Some of them should be ready to release right?

https://redd.it/exasgh
@r_devops

College student looking to interview a software engineer!

Hello all,

I am currently enrolled in a software engineering program at my university and I would like to conduct a recorded audio call interview with someone in the industry as part of a school assignment. I would like to ask about three experiences of a bug escape at your workplace. For example, it could be a successful bug escape, a failed bug escape and a typical bug escape. Of course, this is not set in stone and I am open to any other extra workplace stories!

Please PM me if you are interested as your help will be extremely appreciated!

Thank you again

https://redd.it/exrft3
@r_devops

Show devops: dep-scan is a free open-source dependency audit tool built for CI

Thanks reddit for the fantastic support (and sponsorship!) you gave me when I announced my previous project - a free open-source SAST tool called [sast-scan](https://github.com/AppThreat/sast-scan)

Working on sast-scan gave me several useful insights into the world of vulnerabilities, CVE, CWE and so on. So it made natural sense to implement a new [dependency scanner](https://github.com/AppThreat/dep-scan) for modern DevOps and DevSecOps folks.

If you are used to using dependency-check and those commercial scanners you will find dep-scan to be a lot more performant. Give this project a try and let me know your thoughts.

https://redd.it/exp7n3
@r_devops

instrumenting docker web app with Prometheus

Hello,

I am learning about Prometheus and am trying to find examples of containerized web applications that have Prometheus instrumentation.I have a simple example of how to instrument w/ python:

import http.server
from prometheus _client import start_http_server
class MyHandler(http.server.BaseHTTPRequestHandler):
def do_GET(self):
self.send_response(200)
self.end_headers()
self.wfile.write(b"Hello World")
if __name__ == "__main__"
start_http_server(8000)
server = http.server.HTTPServer(('localhost', 8001), MyHandler)
server.serve_forever()

How can this be added to a dockerized web application that's built with Python?

https://redd.it/exrd1n
@r_devops

Why aren’t ChatOps more popular?

A co-worker asked me this question and I’m curious to hear what other people think.

To be clear, I mean running/monitoring operations from chat interfaces/clients. Not using chatbots (like Hubot)

https://redd.it/exwb9u
@r_devops

Can Nginx handle thousands of virtual hosts?

Hi all. I'm working on an app hosted in Kubernetes that lets users add custom domains. Each time a domain is added, the app creates an ingress (virtual host) and a certificate in Kubernetes. The database used by Kubernetes (etcd) can only scale up to a point because of db size limits, plus there will be a limit to the number of virtual hosts that Nginx can handle. Because of these two reasons I am going to re-architect the app so it can spread users across many small Kubernetes clusters instead of a single big one. Questions:

1. How many virtual hosts can an Nginx instance handle comfortably from your experience? Does anyone have experience with, say, thousands of virtual hosts or more? I will need to do some testing but I would like an idea of what to expect more or less.
2. When there are many virtual hosts, can it happen that Nginx drops connections when reloading the config when a virtual host is created/updated/deleted?
3. Is Nginx quick enough when reloading a config that includes many virtual hosts?
4. Would something like Traefik or Haproxy be any more efficient with many virtual hosts and with dynamically reloading/updating its configuration?

Thanks a lot in advance!

https://redd.it/exti34
@r_devops

pipeline job not parsing IP's correctly

Hi,

​

I am trying to create a job that does an SCP to a couple of servers.

The list of servers comes from Extended Choice Parameter plugin: (values for instance: [1.2.3.4](https://1.2.3.4),[5.6.7.8](https://5.6.7.8))

The stage that SCP's is as follows:

stage('copy'){

sshagent (credentials: \['deploy'\]) {

def ips = "${environment.split(',')}"

for (ip in ips) {

echo ip

}

}

}

​

But instead of getting the IP's I get them separated to each line, for instance:

1

.

2

.

3

.

4.

​

And so on...

​

Can someone guide on how to correctly tim the IP's from a list?

https://redd.it/exq5l1
@r_devops

Designing for Reliability - Using an Internet Door Buzzer as an Example

Hi Reddit - I created an internet door buzzer a while back and being an SRE I decided to describe why I over-engineered it a little bit to increase reliability by a lot. Wrote a thing about it:
https://medium.com/@lutraman/designing-for-reliability-using-an-internet-door-buzzer-as-an-example-eb654b7121d0

https://redd.it/exm1sj
@r_devops

Launch Darkly vs Split.io

Guys,
I am new to feature flags - would love to hear about pros and cons of both Launch darkly and split.io, from people who have used both. And any other alternatives (suitable for big enterprises) that we should consider?

Thanks

https://redd.it/exthn9
@r_devops

Dumping initial data for dockerized MySQL database image.

Hello,

I'm trying to figure out what's the best way to dump related data from a cloud database to create a local development environment via docker image, but I'm having trouble thinking of a solution to getting all related to an record in a table. The database runs on MySQL 5.7

I'll try to explain what I mean:

* Table A is related to Table B and Table C and so on.
* Table B is related to Table M and Table N...
* Table M is related to Table V...
* Table V is related to Table Z

What I want to achieve is make a script/tool/whatever that would extract the data from all nested relation tables from A through Z by the ID(primary key) of a record in Table A.

https://redd.it/extwhz
@r_devops