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add blog post to reflect state of podreadytostartcontainerscondition
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content/en/blog/_posts/2023-12-19-PodReadyToStartContainersCondition-in-beta.md
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--- | ||
layout: blog | ||
title: "Kubernetes 1.29: PodReadyToStartContainersCondition Moves to Beta" | ||
date: 2023-12-19 | ||
slug: pod-ready-to-start-containers-condition-now-in-beta | ||
--- | ||
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**Author**: zefeng chen, Kevin Hannon(Red Hat) | ||
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With the recent release of Kubernetes 1.29, the `PodReadyToStartContainers`[condition](/docs/concepts/workloads/pods/pod-lifecycle/#pod-conditions) is available by default. | ||
The kubelet manages the value for that condition throughout a Pod's lifecycle, | ||
in the status field of a Pod. The kubelet will use the `PodReadyToStartContainers` | ||
condition to accurately surface the initialization state of a Pod, | ||
from the perspective of Pod sandbox creation and network configuration by a container runtime. | ||
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## What's the motivation for this feature? | ||
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Cluster administrators do not have a clear and easily accessible way to view the completion of Pod's sandbox creation | ||
and initialization. As of 1.28, the Initialized condition in Pods tracks the execution of init containers. | ||
However, it has limitations in accurately reflecting the completion of sandbox creation and readiness to start containers for all Pods in a cluster. | ||
This distinction is particularly important in multi-tenant clusters where tenants own the Pod specifications, including the set of init containers, | ||
while cluster administrators manage storage plugins, networking plugins, and container runtime handlers. | ||
Therefore, there is a need for an improved mechanism to provide cluster administrators with a clear and | ||
comprehensive view of Pod sandbox creation completion and container readiness. | ||
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## What's the benefit? | ||
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1.Improved Visibility: Cluster administrators gain a clearer and more comprehensive view of Pod sandbox creation completion and container readiness. | ||
This enhanced visibility allows them to make better-informed decisions and troubleshoot issues more effectively. | ||
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2.Metric Collection and Monitoring: Monitoring services can leverage the fields associated with the PodReadyToStartContainers condition to | ||
report sandbox creation state and latency. | ||
Metrics can be collected at per-Pod cardinality or aggregated based on various | ||
properties of the Pod, such as `volumes`, `runtimeClassName`, custom annotations for CNI | ||
and IPAM plugins or arbitrary labels and annotations, and `storageClassName` of | ||
PersistentVolumeClaims. | ||
This enables comprehensive monitoring and analysis of Pod readiness across the cluster. | ||
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3.Enhanced Troubleshooting: With a more accurate representation of Pod sandbox creation and container readiness, | ||
cluster administrators can quickly identify and address any issues that may arise during the initialization process. | ||
This leads to improved troubleshooting capabilities and reduced downtime. | ||
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### What’s next? | ||
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Due to feedback and adoption, the Kubernetes team promoted `PodReadyToStartContainersCondition` to Beta in 1.29. | ||
Your comments will help determine if this condition continues forward to get promoted to GA, | ||
so please submit additional feedback on this feature! | ||
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### How can I learn more? | ||
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Please check out the | ||
[documentation](/docs/concepts/workloads/pods/pod-lifecycle/) for the | ||
`PodReadyToStartContainersCondition` to learn more about it and how it fits in relation to | ||
other Pod conditions. | ||
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### How to get involved? | ||
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This feature is driven by the SIG Node community. Please join us to connect with | ||
the community and share your ideas and feedback around the above feature and | ||
beyond. We look forward to hearing from you! |