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feat(nginx): cache by blob sha instead of uri #34

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Merged
ChandonPierre merged 3 commits into from
Jan 31, 2024
Merged

feat(nginx): cache by blob sha instead of uri #34

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b298a9e
enable caching by sha for blobs
ChandonPierre Jan 18, 2024
175028e
add request method; disable head conversion
ChandonPierre Jan 19, 2024
b2546cb
add cache key header, use original cache key var in redirects
ChandonPierre Jan 30, 2024
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12 changes: 8 additions & 4 deletions nginx.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -252,6 +252,9 @@ echo "Docker configured with HTTPS_PROXY=$scheme://$http_host/"
proxy_ignore_client_abort on;
proxy_cache_revalidate on;

# Avoid conversion of HEAD method to GET
proxy_cache_convert_head off;

# Hide/ignore headers from caching. S3 especially likes to send Expires headers in the past in some situations.
proxy_hide_header Set-Cookie;
proxy_ignore_headers X-Accel-Expires Expires Cache-Control Set-Cookie;
Expand All @@ -275,15 +278,15 @@ echo "Docker configured with HTTPS_PROXY=$scheme://$http_host/"
# For blob requests by digest, do cache, and treat redirects.
location ~ ^/v2/(.*)/blobs/sha256:(.*) {
set $docker_proxy_request_type "blob-by-digest";
set $cache_key $2;
set $cache_key $request_method$2;
include "/etc/nginx/nginx.manifest.common.conf";
}

# For manifest requests by digest, do cache, and treat redirects.
# These are some of the requests that DockerHub will throttle.
location ~ ^/v2/(.*)/manifests/sha256:(.*) {
set $docker_proxy_request_type "manifest-by-digest";
set $cache_key $uri;
set $cache_key $request_method$uri;
include "/etc/nginx/nginx.manifest.common.conf";
}

Expand All @@ -296,7 +299,7 @@ echo "Docker configured with HTTPS_PROXY=$scheme://$http_host/"
# Since these are mutable, we invalidate them immediately and keep them only in case the backend is down
location ~ ^/v2/(.*)/blobs/ {
set $docker_proxy_request_type "blob-mutable";
set $cache_key $uri;
set $cache_key $request_method$uri;
proxy_cache_valid 0s;
include "/etc/nginx/nginx.manifest.stale.conf";
}
Expand All @@ -307,6 +310,7 @@ echo "Docker configured with HTTPS_PROXY=$scheme://$http_host/"
# the proxy_* directives, these will disappear
set $original_uri $uri;
set $orig_loc $upstream_http_location;
set $orig_cache_key $cache_key
# Handle relative re-direct in Location header (as opposed to absolute)
if ($upstream_http_location !~ "^http") {
set $orig_loc "${scheme}://${host}${upstream_http_location}";
Expand All @@ -322,7 +326,7 @@ echo "Docker configured with HTTPS_PROXY=$scheme://$http_host/"
proxy_cache $cache;
# But we store the result with the cache key of the original request URI
# so that future clients don't need to follow the redirect too
proxy_cache_key $original_uri$slice_range;
proxy_cache_key $orig_cache_key$slice_range;
}

# by default, dont cache anything.
Expand Down