biggest struggles as a software developer (all levels)

Hi,

which are your main struggles as software developers?

https://redd.it/lke7v2
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Stderr monitoring in k8s

Hello guys, i was talking with few developers from my company today and they asked me is there a way to get alerts via slack when there is an error in deployment, all of the things i can think of atm are metrics only, do you have any idea what would be the best way to handle something like that? I would like to avoid having some 3rd party apps like slack bots having access to my namespaces and pods, I also deployed ELK a few weeks ago, so is there maybe some elk alerting service that would come in handy?

Thank you!

https://redd.it/lkogzq
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Curated GitHub repository on how organisations around the world practice SRE and DevOps

I’m curating engineering blog posts, videos and other cool resources on Site Reliability Engineering ans DevOps in a GitHub repository

https://github.com/upgundecha/howtheysre

https://redd.it/lkr952
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What are some must know technologies for devops?

I am learning devops after being a developer and I want to know what are the must know technologies and which ones I should start with learning first and are the most essential and which are the least essential and anything in between. I am currently learning docker and jenkins. I have heard some about kuberneties and terraform but not sure how important it is to have each in a server.

https://redd.it/lksygo
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CircleCI vs Jenkins

Just wanted to know if CircleCI was offering something new that Jenkins hasn't offered before??

https://redd.it/lklsrn
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Estimate cost per user for cloud infrastructure

Lets say that I have a product which allows users to sign up and sell personal services (think craigslist..etc). How do I estimate cost per user, cost per month..etc.

Basically, I am trying to figure out, how much should I be charging user so that I am atleast breaking even, and I want this trend to scale with users.

Is there a formula or other tools that allow to do this end to end cost estimation and growth simulation ?

https://redd.it/lko5ym
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K8s & Consul - Avoid cross-DC/AZ traffic

I have huge app in Kubernetes with about 90 containers on 5 k8s worker nodes. Nodes are spread between Availability Zones in AWS, like that:

node1 - AZ-A
node2 - AZ-A
node3 - AZ-B
node4 - AZ-B
node5 - AZ-C

Also, I got many small apps which use API from that huge app. All apps use external/public host of that app, so actually all traffic between apps goes through ELB.

I can use internal Kubernetes hostnames (now we got coreDNS), but I would like to avoid cross-zone traffic, so how can I implement consul to be AZ aware and prefer traffic between pods in the same AZ, e.g.

Diagram

Something similar but with HAProxy and Redis:

https://medium.com/helpshift-engineering/saving-inter-zone-transfer-costs-in-ec2-with-haproxy-c4217ac2ca04

https://redd.it/lkkeat
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Where to get help?

Where to get help if you get stuck using or learning devops solutions? For example: Ansible, Jenkins...etc

The reason I am asking is for the past 2 days, Ansible wouldn't run playbooks for me. It took me 2 days to figure out the problem Which is that i installed the needed libraries for python3 while ansible was running on python2.

https://redd.it/lkkdtd
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Azure DevOps Demo Generator

Just starting poking around here in this subreddit and I suspect I may be spending a lot of time digging around in here the next few months. :) I just stumbled into this Azure DevOps Demo Generator article from a few days ago and thought I'd share it in case anyone else finds it helpful.

The Azure DevOps Demo Generator | Azure DevOps Blog (microsoft.com)

Also just a side note, I'm aware Microsoft's unfortunate naming of "Azure DevOps" the tool is confusing along side general "DevOps" concepts of technologies LOL...but if you're someone in Microsoft's bubble, it's like a tool you'll likely end up running into.

https://redd.it/lky7hg
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KubeHelper - simplify many daily Kubernetes tasks through a web interface

KubeHelper \- simplifies many daily cluster tasks through a web interface. You can easily do search, analysis, run commands, cron jobs, reports, filters, git synchronization and many more.

KubeHelper is not yet another attempt to display the Kubernetes API in a GUI. Not an attempt to replace Lens, the official Dashboard, or other similar products. This is my humble contribution to the Kubernetes Open Source community. KubeHelper does not have any highly specialized direction and contains quite a few different functions that will be useful in daily work with Kubernetes.

Read full article on Medium

GitHub

https://redd.it/lkk90p
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Polling an API or MYSQL query to do alerting and monitoring?

Is anybody using polling of an API or MySQL query to make sure everything is normal?

Like alerting if the number of failed transactions in a time window is greater than the threshold, or if the API response has a field with a value beyond acceptable limits.

What tools do you use to do such alerting and monitoring?

https://redd.it/lkzkiv
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Does anyone else have experience running spinnaker as their main CD strategy?

Does anyone else have experience running spinnaker as their main CD strategy?

https://redd.it/lkjje7
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Create signed certificates

My CTO sent me a zip containing a .crt, .csr, .key and a .ca-bundle.

I was under the impression that I could use them to created signed certificates for use in nginx (or similar) for using https on our various subdomains.

I'm unsuccessfully trying something like the following

ROOTCAKEY=.mydomain.com2020.key
ROOTCA=.mydomain.com2020.crt
ROOTCSR=.mydomain.com2020.csr

openssl genrsa -out auth-proxy.api.mydomain.com.key 2048

openssl req -new -sha256 -key auth-proxy.api.mydomain.com.key -subj "/C=US/ST=CA/O=MyOrg, Inc./CN=auth-proxy.api.mydomain.com" -out auth-proxy.api.mydomain.com.key.csr

openssl x509 -signkey $ROOTCAKEY -in auth-proxy.api.mydomain.com.key.csr -req -days 365 -out auth-proxy.api.mydomain.com.crt

#openssl x509 -req -in auth-proxy.api.mydomain.com.key.csr -CA $ROOTCA -CAkey $ROOTCAKEY -CAcreateserial -out auth-proxy.api.mydomain.com.crt -days 500 -sha256
#echo crt=$(base64 -w 0 auth-proxy.api.mydomain.com.crt)
#echo
#echo key=$(base64 -w 0 auth-proxy.api.mydomain.com.key)

Can anyone here point me in the right direction?

https://redd.it/lkgvll
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Kubernetes README

https://kubernetesreadme.com/

https://redd.it/ll7t5p
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Multi tenant platform for running docker containers

Guys, i'm looking for open source platform for my users to sign up, request pool of resources and then run containers in each own pool. I have a cluster of virtual machines i want to split between my users (even multiple users on same VM).

I tried kubernetes+dashboard with RBAC/namespace resource allocation. While it perfectly limits cpu/memory usage, but couldn't limit disk space usage per namespace. Even with small persistent volume limits i could open container and create 10 Gb files inside without any restriction. Besides some malefactor can possible mess up cluster for every1 else.

My other idea was to run cloudstack to spin up small VMs for each user, but my CPUs don't have virtualization enabled.

I like how Loft is using virtual k3s clusters, but was hoping to find free alternative.

Lxd and kata containers looks interesting. I hope to find open source service to manage cluster preferably with web-ui. Or any other solution that comes to mind.

https://redd.it/ll7cz0
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Need help understanding the concept of stateful serverless.

Hi all,


I'm trying to understand how tools, like cloudstate, from an architecture meaning.
I get it why FAAS are no good for working with data because you need to call the database every time that the function runs and it's gonna take some time.
But I'm struggling to understand how this tool is working that you can have both serverless architecture and stateful functions?


Thanks!

https://redd.it/llb6gg
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Red Hat and IBM now have a Linux and Private Cloud Administration Specialization on Coursera.

If you're a Coursera subscriber and you're interested: https://www.coursera.org/specializations/linux-private-cloud-administration-power-systems

https://redd.it/llaop6
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Scaling up with serverless computing

The rise of serverless computing is an interesting trend, but many teams still don't quite know why, how and when to use it.

My friend took part in quite a few projects based on the framework and wrote a case study that answers just these questions. In this you will learn why serverless is perfect for the service-based architecture, prototypes or MVPs, but not quite the best one for monoliths. Give it a try and let me know what you think, I can pass questions to the author.

https://redd.it/lla5ji
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problems with spinnaker artifacts in gcp

Good morning everyone, someone with spinnaker experience, I am having trouble defining the artifacts to be able to deploy in a gke cluster, I did the installation provided by Google in gcp, and I am trying to get the artifacts (in this case manifest from k8s) from two different places, first from a gcp bucket and second from GitHub In both cases I get the same error, that the object cannot be resolved.

error for github artifact:

Failed on startup: Unmatched expected artifact ExpectedArtifact(matchArtifact=Artifact(type=github/file, customKind=false, name=k8s/deploy.yml, version=null, location=null, reference=null, metadata={id=8bed9f1f-0806-445d-9c14-f661c568922c}, artifactAccount=c-bordon, provenance=null, uuid=null), usePriorArtifact=false, useDefaultArtifact=false, defaultArtifact=Artifact(type=custom/object, customKind=true, name=null, version=null, location=null, reference=null, metadata={id=7dc222d9-1103-4564-95fc-0eebf0f4fcbd}, artifactAccount=custom-artifact, provenance=null, uuid=null), id=73cd74b1-4089-4a65-833c-1cb917414f51, boundArtifact=null) could not be resolved.

error for gcp bucket:

Failed on startup: Unmatched expected artifact ExpectedArtifact(matchArtifact=Artifact(type=gcs/object, customKind=false, name=gs://demo-pipeline-1/deploy.yml, version=null, location=null, reference=null, metadata={id=10025080-76c4-4926-96bb-75ca24f32262}, artifactAccount=gcs-account, provenance=null, uuid=null), usePriorArtifact=false, useDefaultArtifact=false, defaultArtifact=Artifact(type=custom/object, customKind=true, name=null, version=null, location=null, reference=null, metadata={id=7dc222d9-1103-4564-95fc-0eebf0f4fcbd}, artifactAccount=custom-artifact, provenance=null, uuid=null), id=73cd74b1-4089-4a65-833c-1cb917414f51, boundArtifact=null) could not be resolved.

​

I would appreciate any help

https://redd.it/ll6amj
@r_devops

How do you secure credentials when operating CI/CD?

I know a lot of people are happy to just pass your credentials to GitHub, Circle CI etc. This is fine depending on your risk profile but those credentials often have near admin access to your cloud account.

For those of you who are not happy with providing that level of trust to a third party what do you do? Does anyone know how someone like AWS manages their credentials with CI/CD?

https://redd.it/ll0yfd
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Sensu

Is anyone using Sensu for monitoring? It has all the DevOps concepts that I like to see, but just don't hear that much about it. Everything is New Relic or Datadog..

https://redd.it/lll6m1
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