Which polefs‑client Deployment Strategy Minimizes Downtime and Resource Use?
The article compares three polefs‑client deployment patterns—shared sidecar, per‑PVC Deployment, and per‑Pod Deployment—detailing their architectures, risks, advantages, resource consumption, and upgrade impact, and concludes with a recommendation based on operational cost and performance.
Background
Our company uses a self‑developed polefs shared storage; each mounted volume runs a persistent polefs‑client process. Three deployment options exist:
Run polefs‑client inside the csi‑node‑driver pod (shared sidecar).
Create a dedicated Deployment for each PVC.
Create a dedicated Deployment for each Pod that uses a PVC.
Option 1: Shared Sidecar (polefs‑client in csi‑node‑driver pod)
Architecture: polefs‑client runs as a sidecar in the same DaemonSet pod as the CSI driver; each volume mount starts a separate polefs‑client process.
Key Risk: Upgrade or restart of the CSI driver terminates the polefs‑client, causing I/O interruption for all dependent business pods.
Issue: The client’s lifecycle is tightly coupled to the CSI driver, so CSI upgrades can disrupt storage for many workloads.
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360 Zhihui Cloud Developer
360 Zhihui Cloud is an enterprise open service platform that aims to "aggregate data value and empower an intelligent future," leveraging 360's extensive product and technology resources to deliver platform services to customers.
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