Owolabi The DevOps Guy

@willie_sre A- recent code releases which must be treated as a high-severity incident and focuses must be stabilizing the system first and debug the root cause later I want to learn Snr.

DEVOPS KNOWLEDGE CHECKPOINT A CI/CD pipeline suddenly starts failing during the build stage. What's the first thing you'd check? A) Recent code changes B) Node CPU usage C) DNS records D) Kubernetes version

@willie_sre B- Identification first and debug all intricacies building up in the disk I want to learn oh🙏

SRE KNOWLEDGE CHECKPOINT An alert fires because disk usage has reached 95%. What's your first move? A) Delete random files B) Identify what's consuming the space C) Restart the server D) Scale the application

@willie_sre @FabrizioRomano @McDonalds Platform stability and reliability 💪

@FabrizioRomano @McDonalds The real unsung heroes of the World Cup are the SRE teams keeping FIFA's platform alive for billions of viewers. Nobody talks about them.

Captains by example: Son Heung-min and Christian Pulisic lead their nations with heart and quality, and now they have their own @McDonalds collectible cups. Get 1 in 9 cups when you order the FIFA World Cup™ meal.

@Akintola_steve Change the OstgreSQL schema to accommodate more volumes of storage

Pelumi's logistics app tracks 30,000 drivers updating their location every 5 seconds. That's 6 million writes per hour to a single PostgreSQL table. The table is now 800GB. Queries are slow. Autovacuum can't keep up. What do you do?

@clovisdsdo Reason why is ephemeral in nature👍

@owolabiyusf_dev 🙏🏼K8s does not treat a Pod as something permanent.If a Pod fails, Kubernetes can replace it with a new one.

Day 4/30 Kubernetes Learning Series What is a Pod?

@adevopsgirl_ Integrate the principles of #ShiftLeft from the first GO of the projects and save a lot of the above aforementioned

Securing your workloads (#containers & pods that run your apps) is just as important as securing access and the network. Misconfigured pods can be exploited to gain access to the cluster, escalate privileges, or disrupt services. #Kubernetes #DevOps

@Akintola_steve Currently working on project, integrated me with #4 Engineering principles/theories,I’m a DevOps/Cloud Engineer and dealing with #Platform, #SRE, #Release, #ChaosEngineering just to make a success to the completion of the project. Platform Engineer will take the centre wt #IDP

@owolabiyusf_dev You said it all actually

You join a team and inherit a messy codebase, seriously messy. You start trying to introduce structure, improve stability, and set things up for long-term maintainability. At the same time, management is pushing hard for fast delivery with very tight deadlines. What would you do in that situation?

@fromcodetocloud Pls, your explanation is a bit complicated here, take another shots and read/run through it again.. K8s has #2 storage mount, tagged volume in config spec, which is either an administrator, PV, Persistent Volume {Dynamic} or User, PVC, Persistent Volume Claim

Kubernetes storage finally clicked for me when I stopped memorizing definitions. There are two types of provisioning storage : 1. Static Provisioning 2. Dynamic Provisioning In Static Provisioning : Admin creates a PV manually. PV → PVC → Pod Example: You create a 10Gi EBS volume, create a PV for it, then the application claims it using a PVC. In Dynamic Provisioning : Developer creates only a PVC with a StorageClass. PVC → StorageClass → PV created automatically → Pod Example: A MySQL pod requests 10Gi using the "gp3" StorageClass. Kubernetes automatically creates the EBS volume and PV behind the scenes. Static = You create the storage first. Dynamic = Kubernetes creates the storage when requested. That's why most production EKS clusters use dynamic provisioning. Save for Later & Follow : @fromcodetocloud

@willie_sre A

BUILD IN PUBLIC KNOWLEDGE CHECKPOINT You've been consistently sharing your learning journey for 6 months. What's the biggest long-term benefit? A) Building credibility and proof of work B) Reducing feedback C) Avoiding networking D) Guaranteeing virality

@willie_sre A

AI + TECH KNOWLEDGE CHECKPOINT Your RAG application is returning answers from outdated documents. What should you investigate first? A) Document indexing and retrieval pipeline B) GPU utilization C) Kubernetes version D) API Gateway timeout

@willie_sre A

DEVOPS KNOWLEDGE CHECKPOINT A deployment succeeds in staging but fails in production. What's the first thing you'd compare? A) Environment configuration B) Git branch name C) Developer workstation D) IDE extensions

@willie_sre A

KUBERNETES KNOWLEDGE CHECKPOINT A pod keeps getting rescheduled to different nodes. What's the first thing you'd check? A) Node events and pod events B) Container image size C) Service type D) Ingress annotations

@willie_sre A

TECH KNOWLEDGE CHECKPOINT A website loads successfully by IP address but fails by domain name. What's the most likely issue? A) DNS resolution B) CPU utilization C) Memory leak D) Disk usage

@Palermo_seun @officialEFCC Amin Thumma Amin 🤲🏻 And you too…

@owolabiyusf_dev @officialEFCC God bless you

This suspect stores ATM PINs on his POS machine. I can only imagine how many innocent people have become his victims.😭 Video: MC Agogo.

@Ahmed___khaan @Palermo_seun @officialEFCC Inside life🙈😢

@owolabiyusf_dev @Palermo_seun @officialEFCC Omo people wicked

@clovisdsdo You forgot to add-up to the #ControlPlane of the K8s, #CloudControllerMgr, which helps with ALB, during the ingress {HTTP/S} global services requirements (#ControlMgr).

Day 3/30 Kubernetes Learning Series Kubernetes Architecture👇👇👇

@willie_sre Taints and Toleration works out in this syntax…if not well configured in the configuration spec, it’ll fail!

@owolabiyusf_dev Absolutely right. A healthy pod doesn't guarantee traffic is reaching it. If the Service selector doesn't match the pod labels, Kubernetes won't create endpoints, and users won't be able to access the application.

KUBERNETES KNOWLEDGE CHECKPOINT Your pods are running. Your Service exists. Your Ingress is healthy. Users still get 503 errors. What's the first thing you'd check? A) Service selectors and endpoints B) Node disk space C) Cluster version D) Container image size