MRIDUL TIWARI (@MridulTi)

When /var/tmp forgot our Kafka directory

The alert wasn’t dramatic. REST on 8083 answered fine, the connector showed RUNNING, and then I pulled task status and saw FAILED with a stack trace long enough to scroll past three screens. Patch nig

Oct 11 · 6 min readmriduliti.hashnode.dev

When the cluster looked idle but nothing would schedule

The first thing I checked was the obvious one: CPU. Our non-prod EKS workers are Karpenter-managed, and application pods had been sitting in Pending long enough that Istio and app syncs were backing u

Oct 4 · 6 min readmriduliti.hashnode.dev

Patch night wasn’t one incident — it was three failure modes in a row

Tuesday’s plan looked boring on paper: run the SSM patch runbooks across a bunch of Auto Scaling Groups, bake AMIs, promote launch templates, go home. By midnight I was still on a call with Jenkins co

2Sep 27 · 9 min readmriduliti.hashnode.dev

No official Storm Helm chart — how we put Apache Storm on EKS anyway

The Argo CD app for Storm had been red for two days, but the symptom that actually sent me down the rabbit hole was quieter than a crash loop: init containers on the Supervisor pods, stuck forever, pr

Sep 17 · 10 min readmriduliti.hashnode.dev

We tagged EKS workers like app servers — and Prometheus started scraping telegraf on nodes that never had it

The Telegraf Down alerts started piling up on a Thursday morning, and at first glance it looked bad. Nine targets, all critical, all under the same rule name. My first instinct was a fleet-wide agent

Sep 12 · 7 min readmriduliti.hashnode.dev

MRIDUL TIWARI

About

Available for

MRIDUL TIWARI's blogs

When /var/tmp forgot our Kafka directory

When the cluster looked idle but nothing would schedule

Patch night wasn’t one incident — it was three failure modes in a row

No official Storm Helm chart — how we put Apache Storm on EKS anyway

We tagged EKS workers like app servers — and Prometheus started scraping telegraf on nodes that never had it

MRIDUL TIWARI

About

Available for

MRIDUL TIWARI's blogs

When /var/tmp forgot our Kafka directory

When the cluster looked idle but nothing would schedule

Patch night wasn’t one incident — it was three failure modes in a row

No official Storm Helm chart — how we put Apache Storm on EKS anyway

We tagged EKS workers like app servers — and Prometheus started scraping telegraf on nodes that never had it

MRIDUL TIWARI

About

Available for

MRIDUL TIWARI's blogs

When /var/tmp forgot our Kafka directory

When the cluster looked idle but nothing would schedule

Patch night wasn’t one incident — it was three failure modes in a row

No official Storm Helm chart — how we put Apache Storm on EKS anyway

We tagged EKS workers like app servers — and Prometheus started scraping telegraf on nodes that never had it

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MRIDUL TIWARI

About

Available for

MRIDUL TIWARI's blogs

When /var/tmp forgot our Kafka directory

When the cluster looked idle but nothing would schedule

Patch night wasn’t one incident — it was three failure modes in a row

No official Storm Helm chart — how we put Apache Storm on EKS anyway

We tagged EKS workers like app servers — and Prometheus started scraping telegraf on nodes that never had it