[backport stable/v2.2] storage: simplify mirror implementation #1400
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Nydusd uses a registry backend which generates a surge of blob requests without auth tokens on initial startup. This caused mirror backends (e.g. dragonfly) to process very slowly, the commit fixes this problem. It implements waiting for the first blob request to complete before making other blob requests, this ensures the first request caches a valid registry auth token, and subsequent concurrent blob requests can reuse the cached token. This change is worthwhile to reduce concurrent token requests, it also makes the behavior consistent with containerd, which first requests the image manifest and caches the token before concurrently requesting blobs. Signed-off-by: Yan Song <[email protected]>
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The auth_through option adds user burden to configure the mirror and understand its meaning, and since we have optimized handling of concurrent token requests, this option can now be removed. Signed-off-by: Yan Song <[email protected]>
- Make registry mirror log pretty; - Adjust token refresh interval automatically; Signed-off-by: Yan Song <[email protected]>
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Relevant Issue (if applicable)
Backport PR #1375 to stable/v2.2
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