Add allowedSourcePrefixes annotation documentation#2613
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Pull request overview
Adds new documentation pages across Calico OSS, Calico Enterprise, and Calico Cloud describing the cni.projectcalico.org/allowedSourcePrefixes pod annotation and links them into each product’s “Configure networking” sidebar.
Changes:
- Added
allowed-source-prefixes.mdxundernetworking/configuring/for Calico, Enterprise, and Cloud. - Documented the required FelixConfiguration setting (
workloadSourceSpoofing: Any) and included a security caution about admission control. - Added sidebar entries in all three products so the new page is discoverable.
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.
Show a summary per file
| File | Description |
|---|---|
| sidebars-calico.js | Adds the new “allowed-source-prefixes” page to the Calico OSS networking/configuring sidebar. |
| sidebars-calico-enterprise.js | Adds the new page to the Calico Enterprise networking/configuring sidebar. |
| sidebars-calico-cloud.js | Adds the new page to the Calico Cloud networking/configuring sidebar. |
| calico/networking/configuring/allowed-source-prefixes.mdx | New OSS doc page for the allowedSourcePrefixes annotation and Felix prerequisite. |
| calico-enterprise/networking/configuring/allowed-source-prefixes.mdx | New Enterprise doc page for the allowedSourcePrefixes annotation and Felix prerequisite. |
| calico-cloud/networking/configuring/allowed-source-prefixes.mdx | New Cloud doc page for the allowedSourcePrefixes annotation and Felix prerequisite. |
tomastigera
marked this pull request as ready for review
July 22, 2026 16:13
Document the cni.projectcalico.org/allowedSourcePrefixes pod annotation across all three products (Calico, Calico Enterprise, Calico Cloud). This annotation allows pods to send egress traffic with source IPs outside their own address, requiring workloadSourceSpoofing: Any in FelixConfiguration. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add Calico CNI prerequisite with product-correct link (OSS uses configure-cni-plugins.mdx; Enterprise/Cloud use component-resources/configuration.mdx). The three pages are no longer byte-identical for this reason. - Fix FelixConfiguration apiVersion from crd.projectcalico.org/v1 to projectcalico.org/v3, matching the rest of the docs. - Note the annotation is enforced in both iptables/nftables and eBPF dataplanes. - Clarify that Felix drops (does not program) a pod requesting source prefixes until workloadSourceSpoofing: Any is set, per felix/calc/validation_filter.go. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
allowed-source-prefixes.mdxpage undernetworking/configuring/for all three products (Calico, Calico Enterprise, Calico Cloud)cni.projectcalico.org/allowedSourcePrefixespod annotation, which allows pods to send egress traffic with source IPs outside their own addressworkloadSourceSpoofing: AnyFelixConfiguration setting and security caution about admission controlTest plan
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