Daniele Polencic
@danielepolencic.com
Teaching Kubernetes at @LearnKube.com
Just landed: Learn Kubernetes weekly 170! My top picks:
💾 Persistent Storage in AKS
🌐 Kubernetes Gateway API Setup
🔗 Unifying Inner & Outer Loops
🔍 Korrel8r Observability Correlation Engine
Read it here: https://kube.today/issues/170
💾 Persistent Storage in AKS
🌐 Kubernetes Gateway API Setup
🔗 Unifying Inner & Outer Loops
🔍 Korrel8r Observability Correlation Engine
Read it here: https://kube.today/issues/170
February 11, 2026 at 12:11 PM
Just landed: Learn Kubernetes weekly 170! My top picks:
💾 Persistent Storage in AKS
🌐 Kubernetes Gateway API Setup
🔗 Unifying Inner & Outer Loops
🔍 Korrel8r Observability Correlation Engine
Read it here: https://kube.today/issues/170
💾 Persistent Storage in AKS
🌐 Kubernetes Gateway API Setup
🔗 Unifying Inner & Outer Loops
🔍 Korrel8r Observability Correlation Engine
Read it here: https://kube.today/issues/170
Last year, I mapped the K8s multitenancy spectrum. This year, I'm adding AI agent sandboxing — where does it fit when the tenant isn't a human but a machine acting autonomously?
In collaboration with @vcluster.com
Feb 24 — 10:00 AM ET
https://ku.bz/Kzd7BPBqq
In collaboration with @vcluster.com
Feb 24 — 10:00 AM ET
https://ku.bz/Kzd7BPBqq
February 10, 2026 at 3:21 PM
Last year, I mapped the K8s multitenancy spectrum. This year, I'm adding AI agent sandboxing — where does it fit when the tenant isn't a human but a machine acting autonomously?
In collaboration with @vcluster.com
Feb 24 — 10:00 AM ET
https://ku.bz/Kzd7BPBqq
In collaboration with @vcluster.com
Feb 24 — 10:00 AM ET
https://ku.bz/Kzd7BPBqq
When the cluster is full, priority decides who stays
Higher-priority pods can preempt lower-priority ones. The evicted pods go back to Pending
Full guide with 30+ diagrams: https://learnkube.com/kubernetes-scheduler-explained
Weekly newsletter: https://kube.today/learn-kubernetes-weekly
Higher-priority pods can preempt lower-priority ones. The evicted pods go back to Pending
Full guide with 30+ diagrams: https://learnkube.com/kubernetes-scheduler-explained
Weekly newsletter: https://kube.today/learn-kubernetes-weekly
February 9, 2026 at 1:46 PM
When the cluster is full, priority decides who stays
Higher-priority pods can preempt lower-priority ones. The evicted pods go back to Pending
Full guide with 30+ diagrams: https://learnkube.com/kubernetes-scheduler-explained
Weekly newsletter: https://kube.today/learn-kubernetes-weekly
Higher-priority pods can preempt lower-priority ones. The evicted pods go back to Pending
Full guide with 30+ diagrams: https://learnkube.com/kubernetes-scheduler-explained
Weekly newsletter: https://kube.today/learn-kubernetes-weekly
Here's what most people miss: resource requests
Without them, the scheduler treats your pod as having zero size. Every node looks like it has infinite capacity
It will pack pods until the kubelet starts evicting them
Without them, the scheduler treats your pod as having zero size. Every node looks like it has infinite capacity
It will pack pods until the kubelet starts evicting them
February 9, 2026 at 1:46 PM
Here's what most people miss: resource requests
Without them, the scheduler treats your pod as having zero size. Every node looks like it has infinite capacity
It will pack pods until the kubelet starts evicting them
Without them, the scheduler treats your pod as having zero size. Every node looks like it has infinite capacity
It will pack pods until the kubelet starts evicting them
Scoring ranks the survivors from 0 to 100 across 13 plugins
A node that's mostly empty scores higher than one that's nearly full
Highest total wins. The pod gets scheduled there
A node that's mostly empty scores higher than one that's nearly full
Highest total wins. The pod gets scheduled there
February 9, 2026 at 1:46 PM
Scoring ranks the survivors from 0 to 100 across 13 plugins
A node that's mostly empty scores higher than one that's nearly full
Highest total wins. The pod gets scheduled there
A node that's mostly empty scores higher than one that's nearly full
Highest total wins. The pod gets scheduled there
Example: your pod needs a GPU
The filter phase discards every node without one
Only GPU-equipped nodes survive to the scoring round
The filter phase discards every node without one
Only GPU-equipped nodes survive to the scoring round
February 9, 2026 at 1:46 PM
Example: your pod needs a GPU
The filter phase discards every node without one
Only GPU-equipped nodes survive to the scoring round
The filter phase discards every node without one
Only GPU-equipped nodes survive to the scoring round
Filtering is pass/fail
Wrong labels? Out. Not enough CPU? Out. Tainted? Out
A node must pass all 13 filter plugins to stay in the game. One failure and it's eliminated
Wrong labels? Out. Not enough CPU? Out. Tainted? Out
A node must pass all 13 filter plugins to stay in the game. One failure and it's eliminated
February 9, 2026 at 1:46 PM
Filtering is pass/fail
Wrong labels? Out. Not enough CPU? Out. Tainted? Out
A node must pass all 13 filter plugins to stay in the game. One failure and it's eliminated
Wrong labels? Out. Not enough CPU? Out. Tainted? Out
A node must pass all 13 filter plugins to stay in the game. One failure and it's eliminated
The scheduler picks pods from the queue one by one
For each pod, it runs two phases:
➀ Filtering — discard nodes that can't run the pod
➁ Scoring — rank what's left
Then it binds the pod to the winning node
For each pod, it runs two phases:
➀ Filtering — discard nodes that can't run the pod
➁ Scoring — rank what's left
Then it binds the pod to the winning node
February 9, 2026 at 1:46 PM
The scheduler picks pods from the queue one by one
For each pod, it runs two phases:
➀ Filtering — discard nodes that can't run the pod
➁ Scoring — rank what's left
Then it binds the pod to the winning node
For each pod, it runs two phases:
➀ Filtering — discard nodes that can't run the pod
➁ Scoring — rank what's left
Then it binds the pod to the winning node
When you deploy a workload, Kubernetes needs to decide which node runs it
Pods start as "Pending" — they exist in etcd but aren't assigned anywhere yet
The scheduler watches for these unassigned pods and queues them
Pods start as "Pending" — they exist in etcd but aren't assigned anywhere yet
The scheduler watches for these unassigned pods and queues them
February 9, 2026 at 1:46 PM
When you deploy a workload, Kubernetes needs to decide which node runs it
Pods start as "Pending" — they exist in etcd but aren't assigned anywhere yet
The scheduler watches for these unassigned pods and queues them
Pods start as "Pending" — they exist in etcd but aren't assigned anywhere yet
The scheduler watches for these unassigned pods and queues them
The Kubernetes scheduler doesn't randomly assign pods to nodes
It runs a two-phase pipeline: filter, then score
Here's how it works, in 7 diagrams
It runs a two-phase pipeline: filter, then score
Here's how it works, in 7 diagrams
February 9, 2026 at 1:46 PM
The Kubernetes scheduler doesn't randomly assign pods to nodes
It runs a two-phase pipeline: filter, then score
Here's how it works, in 7 diagrams
It runs a two-phase pipeline: filter, then score
Here's how it works, in 7 diagrams
Just landed: Learn Kubernetes weekly 169! My top picks:
🔧 Vanilla K8s on NixOS
📊 Signals to Reliability: SLOs, Runbooks and Post-Mortems
🚪 Introducing MCP-Gateway in Kagenti
🤖 Kubently: Agentic K8s Debugging
Read it here: https://kube.today/issues/169
🔧 Vanilla K8s on NixOS
📊 Signals to Reliability: SLOs, Runbooks and Post-Mortems
🚪 Introducing MCP-Gateway in Kagenti
🤖 Kubently: Agentic K8s Debugging
Read it here: https://kube.today/issues/169
February 4, 2026 at 12:11 PM
Just landed: Learn Kubernetes weekly 169! My top picks:
🔧 Vanilla K8s on NixOS
📊 Signals to Reliability: SLOs, Runbooks and Post-Mortems
🚪 Introducing MCP-Gateway in Kagenti
🤖 Kubently: Agentic K8s Debugging
Read it here: https://kube.today/issues/169
🔧 Vanilla K8s on NixOS
📊 Signals to Reliability: SLOs, Runbooks and Post-Mortems
🚪 Introducing MCP-Gateway in Kagenti
🤖 Kubently: Agentic K8s Debugging
Read it here: https://kube.today/issues/169
Just landed: Learn Kubernetes weekly 168! My top picks:
🔍 Job Failures to Serial Console Bottlenecks
📊 OpenTelemetry-Native LGTM Stack
📦 Container Image Reduction: 1.2GB to 100MB
🔎 Lynq: SQL-like Kubernetes
Read it here: https://kube.today/issues/168
🔍 Job Failures to Serial Console Bottlenecks
📊 OpenTelemetry-Native LGTM Stack
📦 Container Image Reduction: 1.2GB to 100MB
🔎 Lynq: SQL-like Kubernetes
Read it here: https://kube.today/issues/168
January 28, 2026 at 12:11 PM
Just landed: Learn Kubernetes weekly 168! My top picks:
🔍 Job Failures to Serial Console Bottlenecks
📊 OpenTelemetry-Native LGTM Stack
📦 Container Image Reduction: 1.2GB to 100MB
🔎 Lynq: SQL-like Kubernetes
Read it here: https://kube.today/issues/168
🔍 Job Failures to Serial Console Bottlenecks
📊 OpenTelemetry-Native LGTM Stack
📦 Container Image Reduction: 1.2GB to 100MB
🔎 Lynq: SQL-like Kubernetes
Read it here: https://kube.today/issues/168
💰 A full Kubernetes cluster for $2/month. Three nodes, multi-region, real workloads
💡 The clever part: skip the $10/month load balancer entirely. Tailscale operator + tailnet = fully private cluster by default
https://ku.bz/HpVyQMVv0
💡 The clever part: skip the $10/month load balancer entirely. Tailscale operator + tailnet = fully private cluster by default
https://ku.bz/HpVyQMVv0
January 27, 2026 at 12:56 PM
💰 A full Kubernetes cluster for $2/month. Three nodes, multi-region, real workloads
💡 The clever part: skip the $10/month load balancer entirely. Tailscale operator + tailnet = fully private cluster by default
https://ku.bz/HpVyQMVv0
💡 The clever part: skip the $10/month load balancer entirely. Tailscale operator + tailnet = fully private cluster by default
https://ku.bz/HpVyQMVv0
Just landed: Learn Kubernetes weekly 167! My top picks:
🏗️ 80M User Infrastructure with a 5-Person Team
🤖 Self-Hosted RAG on Kubernetes
☁️ Managed Kubernetes on Proxmox with CAPI
📊 Prom Analytics Proxy
Read it here: https://kube.today/issues/167
🏗️ 80M User Infrastructure with a 5-Person Team
🤖 Self-Hosted RAG on Kubernetes
☁️ Managed Kubernetes on Proxmox with CAPI
📊 Prom Analytics Proxy
Read it here: https://kube.today/issues/167
January 21, 2026 at 12:11 PM
Just landed: Learn Kubernetes weekly 167! My top picks:
🏗️ 80M User Infrastructure with a 5-Person Team
🤖 Self-Hosted RAG on Kubernetes
☁️ Managed Kubernetes on Proxmox with CAPI
📊 Prom Analytics Proxy
Read it here: https://kube.today/issues/167
🏗️ 80M User Infrastructure with a 5-Person Team
🤖 Self-Hosted RAG on Kubernetes
☁️ Managed Kubernetes on Proxmox with CAPI
📊 Prom Analytics Proxy
Read it here: https://kube.today/issues/167
Just landed: Learn Kubernetes weekly 166! My top picks:
🐛 Fixing Kubelet Sandbox Errors
📊 Distributed Tracing with Tempo on AKS
💰 SimKube for Cost Forecasting
🚀 Kargo: GitOps Automation
Read it here: https://kube.today/issues/166
🐛 Fixing Kubelet Sandbox Errors
📊 Distributed Tracing with Tempo on AKS
💰 SimKube for Cost Forecasting
🚀 Kargo: GitOps Automation
Read it here: https://kube.today/issues/166
January 14, 2026 at 12:11 PM
Just landed: Learn Kubernetes weekly 166! My top picks:
🐛 Fixing Kubelet Sandbox Errors
📊 Distributed Tracing with Tempo on AKS
💰 SimKube for Cost Forecasting
🚀 Kargo: GitOps Automation
Read it here: https://kube.today/issues/166
🐛 Fixing Kubelet Sandbox Errors
📊 Distributed Tracing with Tempo on AKS
💰 SimKube for Cost Forecasting
🚀 Kargo: GitOps Automation
Read it here: https://kube.today/issues/166
83% of Kubernetes teams use network policies. 60% struggle to understand what they're actually doing
I surveyed 530 practitioners and here is what I found: https://kube.today/kubernetes-network-policies-2025
I surveyed 530 practitioners and here is what I found: https://kube.today/kubernetes-network-policies-2025
January 12, 2026 at 12:46 PM
83% of Kubernetes teams use network policies. 60% struggle to understand what they're actually doing
I surveyed 530 practitioners and here is what I found: https://kube.today/kubernetes-network-policies-2025
I surveyed 530 practitioners and here is what I found: https://kube.today/kubernetes-network-policies-2025
Just landed: Learn Kubernetes weekly 165! My top picks:
🌐 Stretching a Layer 2 network over KubeVirt
💰 Reducing Feature Environment Costs with KEDA
☁️ Build your own SaaS with Kamaji
🔄 VolSync PV Replication
Read it here: https://kube.today/issues/165
🌐 Stretching a Layer 2 network over KubeVirt
💰 Reducing Feature Environment Costs with KEDA
☁️ Build your own SaaS with Kamaji
🔄 VolSync PV Replication
Read it here: https://kube.today/issues/165
January 7, 2026 at 11:36 AM
Just landed: Learn Kubernetes weekly 165! My top picks:
🌐 Stretching a Layer 2 network over KubeVirt
💰 Reducing Feature Environment Costs with KEDA
☁️ Build your own SaaS with Kamaji
🔄 VolSync PV Replication
Read it here: https://kube.today/issues/165
🌐 Stretching a Layer 2 network over KubeVirt
💰 Reducing Feature Environment Costs with KEDA
☁️ Build your own SaaS with Kamaji
🔄 VolSync PV Replication
Read it here: https://kube.today/issues/165
Just landed: Learn Kubernetes weekly 164! My top picks:
🛡️ Enforcing policies with GateKeeper
📦 Partitioned Log Storage on S3
🎮 Dynamic MIG Partitioning
🔐 Crowdsec: security solution
Read it here: https://kube.today/issues/164
🛡️ Enforcing policies with GateKeeper
📦 Partitioned Log Storage on S3
🎮 Dynamic MIG Partitioning
🔐 Crowdsec: security solution
Read it here: https://kube.today/issues/164
December 31, 2025 at 11:36 AM
Just landed: Learn Kubernetes weekly 164! My top picks:
🛡️ Enforcing policies with GateKeeper
📦 Partitioned Log Storage on S3
🎮 Dynamic MIG Partitioning
🔐 Crowdsec: security solution
Read it here: https://kube.today/issues/164
🛡️ Enforcing policies with GateKeeper
📦 Partitioned Log Storage on S3
🎮 Dynamic MIG Partitioning
🔐 Crowdsec: security solution
Read it here: https://kube.today/issues/164
Just landed: Learn Kubernetes weekly 163! My top picks:
💾 Home Data Lake on a Budget
🧠 Smart Load Balancing at Databricks
🔗 Postgres Pooling with pgBouncer
🚪 Goma Gateway: Declarative API Gateway
Read it here: https://kube.today/issues/163
💾 Home Data Lake on a Budget
🧠 Smart Load Balancing at Databricks
🔗 Postgres Pooling with pgBouncer
🚪 Goma Gateway: Declarative API Gateway
Read it here: https://kube.today/issues/163
December 24, 2025 at 11:36 AM
Just landed: Learn Kubernetes weekly 163! My top picks:
💾 Home Data Lake on a Budget
🧠 Smart Load Balancing at Databricks
🔗 Postgres Pooling with pgBouncer
🚪 Goma Gateway: Declarative API Gateway
Read it here: https://kube.today/issues/163
💾 Home Data Lake on a Budget
🧠 Smart Load Balancing at Databricks
🔗 Postgres Pooling with pgBouncer
🚪 Goma Gateway: Declarative API Gateway
Read it here: https://kube.today/issues/163
Just landed: Learn Kubernetes weekly 162! My top picks:
🔐 Securing K8s with Kong + Keycloak
🌐 Networking for EKS Hybrid Nodes
📊 Victoria Logs vs Loki: Benchmarking Results
🛡️ Kexa: Cloud Compliance at Scale
Read it here: https://kube.today/issues/162
🔐 Securing K8s with Kong + Keycloak
🌐 Networking for EKS Hybrid Nodes
📊 Victoria Logs vs Loki: Benchmarking Results
🛡️ Kexa: Cloud Compliance at Scale
Read it here: https://kube.today/issues/162
December 17, 2025 at 11:36 AM
Just landed: Learn Kubernetes weekly 162! My top picks:
🔐 Securing K8s with Kong + Keycloak
🌐 Networking for EKS Hybrid Nodes
📊 Victoria Logs vs Loki: Benchmarking Results
🛡️ Kexa: Cloud Compliance at Scale
Read it here: https://kube.today/issues/162
🔐 Securing K8s with Kong + Keycloak
🌐 Networking for EKS Hybrid Nodes
📊 Victoria Logs vs Loki: Benchmarking Results
🛡️ Kexa: Cloud Compliance at Scale
Read it here: https://kube.today/issues/162
Just landed: Learn Kubernetes weekly 161! My top picks:
🧩 JVM Crash-Loop Debugging
🏪 Edge Kubernetes Evolution
☁️ Kubernetes for Cloud Infrastructure
🏷️ Kube-vip Load Balancer
Read it here: https://kube.today/issues/161
🧩 JVM Crash-Loop Debugging
🏪 Edge Kubernetes Evolution
☁️ Kubernetes for Cloud Infrastructure
🏷️ Kube-vip Load Balancer
Read it here: https://kube.today/issues/161
December 10, 2025 at 11:56 AM
Just landed: Learn Kubernetes weekly 161! My top picks:
🧩 JVM Crash-Loop Debugging
🏪 Edge Kubernetes Evolution
☁️ Kubernetes for Cloud Infrastructure
🏷️ Kube-vip Load Balancer
Read it here: https://kube.today/issues/161
🧩 JVM Crash-Loop Debugging
🏪 Edge Kubernetes Evolution
☁️ Kubernetes for Cloud Infrastructure
🏷️ Kube-vip Load Balancer
Read it here: https://kube.today/issues/161
There's so much more that didn't make it to this list!
I'll take a short break to recharge and be ready for 2026!
Thank you all for an incredible year 🎉
I'll take a short break to recharge and be ready for 2026!
Thank you all for an incredible year 🎉
December 8, 2025 at 2:06 PM
There's so much more that didn't make it to this list!
I'll take a short break to recharge and be ready for 2026!
Thank you all for an incredible year 🎉
I'll take a short break to recharge and be ready for 2026!
Thank you all for an incredible year 🎉
LLMs changed how I work this year
I can be way more ambitious with my projects now
I explored this in a webinar with AWS: "Teaching Claude to be an Engineer" for stateful K8s migrations
https://ku.bz/claude-k8s
I can be way more ambitious with my projects now
I explored this in a webinar with AWS: "Teaching Claude to be an Engineer" for stateful K8s migrations
https://ku.bz/claude-k8s
December 8, 2025 at 2:06 PM
LLMs changed how I work this year
I can be way more ambitious with my projects now
I explored this in a webinar with AWS: "Teaching Claude to be an Engineer" for stateful K8s migrations
https://ku.bz/claude-k8s
I can be way more ambitious with my projects now
I explored this in a webinar with AWS: "Teaching Claude to be an Engineer" for stateful K8s migrations
https://ku.bz/claude-k8s
48 newsletter issues published
The Learn Kubernetes Newsletter now lives on Kube Today—issue 161 drops this week
We hit 80k subscribers
Huge thank you to our sponsors who made this possible!
https://learnkube.com/sponsorships
The Learn Kubernetes Newsletter now lives on Kube Today—issue 161 drops this week
We hit 80k subscribers
Huge thank you to our sponsors who made this possible!
https://learnkube.com/sponsorships
December 8, 2025 at 2:06 PM
48 newsletter issues published
The Learn Kubernetes Newsletter now lives on Kube Today—issue 161 drops this week
We hit 80k subscribers
Huge thank you to our sponsors who made this possible!
https://learnkube.com/sponsorships
The Learn Kubernetes Newsletter now lives on Kube Today—issue 161 drops this week
We hit 80k subscribers
Huge thank you to our sponsors who made this possible!
https://learnkube.com/sponsorships
40 podcast episodes of KubeFM!
Season 7 brought amazing guests: GitOps migrations, macOS workloads on K8s, building Kubernetes from scratch in Go…
Thanks Bart for making this happen!
https://kube.fm
Season 7 brought amazing guests: GitOps migrations, macOS workloads on K8s, building Kubernetes from scratch in Go…
Thanks Bart for making this happen!
https://kube.fm
December 8, 2025 at 2:06 PM
40 podcast episodes of KubeFM!
Season 7 brought amazing guests: GitOps migrations, macOS workloads on K8s, building Kubernetes from scratch in Go…
Thanks Bart for making this happen!
https://kube.fm
Season 7 brought amazing guests: GitOps migrations, macOS workloads on K8s, building Kubernetes from scratch in Go…
Thanks Bart for making this happen!
https://kube.fm