initial commit
ricardop
parent
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commit
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.idea
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.git
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.gitignore
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LICENSE
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README.md
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.idea
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# Use stable nginx on alpine for a light container
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FROM nginx:stable-alpine
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# Add openssl and clean apk cache
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RUN apk add --update openssl && rm -rf /var/cache/apk/*
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# Generate a self-signed SSL certificate. It will be ignored by Docker clients due to insecure-registries.
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RUN mkdir -p /etc/ssl && \
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cd /etc/ssl && \
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openssl genrsa -des3 -passout pass:x -out key.pem 2048 && \
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cp key.pem key.pem.orig && \
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openssl rsa -passin pass:x -in key.pem.orig -out key.pem && \
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openssl req -new -key key.pem -out cert.csr -subj "/C=BR/ST=BR/L=Nowhere/O=Fake Docker Mirror/OU=Docker/CN=docker.proxy" && \
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openssl x509 -req -days 3650 -in cert.csr -signkey key.pem -out cert.pem
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# Create the cache directory
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RUN mkdir -p /docker_mirror_cache
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# Expose it as a volume, so cache can be kept external to the Docker image
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VOLUME /docker_mirror_cache
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# Add our configuration
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ADD nginx.conf /etc/nginx/nginx.conf
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# Test that the configuration is OK
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RUN nginx -t
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user nginx;
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worker_processes auto;
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error_log /var/log/nginx/error.log debug;
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pid /var/run/nginx.pid;
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events {
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worker_connections 1024;
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}
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http {
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include /etc/nginx/mime.types;
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default_type application/octet-stream;
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# Use a debug-oriented logging format.
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log_format tweaked '$remote_addr - $remote_user [$time_local] "$request" '
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'$status $body_bytes_sent '
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'"HOST: $host" "UPSTREAM: $upstream_addr" '
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'"UPSTREAM-STATUS: $upstream_status" '
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'"SSL-PROTO: $ssl_protocol" '
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'"PROXY-HOST: $proxy_host" "UPSTREAM-REDIRECT: $upstream_http_location" "CACHE-STATUS: $upstream_cache_status"';
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access_log /var/log/nginx/access.log tweaked;
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keepalive_timeout 300;
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gzip off;
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# The cache directory. This can get huge. Better to use a Docker volume pointing here!
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# Set to 32gb which should be enough
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proxy_cache_path /docker_mirror_cache levels=1:2 max_size=32g inactive=60d keys_zone=cache:10m use_temp_path=off;
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# Just in case you want to rewrite some hosts. Default maps directly.
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map $host $targetHost {
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hostnames;
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default $host;
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}
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# These maps parse the original Host and URI from a /forcecache redirect.
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map $request_uri $realHost {
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~/forcecacheinsecure/([^:/]+)/originalwas(/.+) $1;
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~/forcecachesecure/([^:/]+)/originalwas(/.+) $1;
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default "DID_NOT_MATCH_HOST";
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}
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map $request_uri $realPath {
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~/forcecacheinsecure/([^:/]+)/originalwas(/.+) $2;
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~/forcecachesecure/([^:/]+)/originalwas(/.+) $2;
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default "DID_NOT_MATCH_PATH";
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}
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server {
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# Listen on both 80 and 443, for all hostnames.
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listen 80 default_server;
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listen 443 ssl default_server;
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server_name _;
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# Use a fake SSL certificate. This does not matter, since the Docker clients will be configured with insecure registry
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ssl_certificate /etc/ssl/cert.pem;
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ssl_certificate_key /etc/ssl/key.pem;
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# We need to resolve the real names of our proxied servers.
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resolver 8.8.8.8 4.2.2.2 ipv6=off; # Avoid ipv6 addresses for now
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# Docker needs this. Don't ask.
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chunked_transfer_encoding on;
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# Block POST/PUT/DELETE. Don't use this proxy for pushing.
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if ($request_method = POST) {
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return 405;
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}
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if ($request_method = PUT) {
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return 405;
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}
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if ($request_method = DELETE) {
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return 405;
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}
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proxy_read_timeout 900;
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# Use cache locking, with a huge timeout, so that multiple Docker clients asking for the same blob at the same time
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# will wait for the first to finish instead of doing multiple upstream requests.
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proxy_cache_lock on;
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proxy_cache_lock_timeout 120s;
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proxy_cache_valid 200 301 302 60d; # Cache all 200, 301, and 302 for 60 days.
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proxy_force_ranges on;
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proxy_ignore_client_abort on;
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proxy_cache_revalidate on;
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# don't cache mutable entity /v2/<name>/manifests/<reference> (unless the reference is a digest)
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location ~ ^/v2/[^\/]+/manifests/(?![A-Fa-f0-9_+.-]+:) {
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proxy_pass https://$targetHost;
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add_header X-Eh-Aqui $targetHost;
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}
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# don't cache mutable entity /v2/<name>/tags/list
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location ~ ^/v2/[^\/]+/tags/list {
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proxy_pass https://$targetHost;
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}
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# don't cache mutable entity /v2/_catalog
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location ~ ^/v2/_catalog$ {
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proxy_pass https://$targetHost;
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}
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# cache everything else
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location / {
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proxy_pass https://$targetHost;
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proxy_cache cache;
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# Handling of redirects.
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# Many registries (eg, quay.io, or k8s.gcr.io) emit a Location redirect
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# pointing to something like cloudfront, or google storage.
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# We hack into the response, extracting the host and URI parts, injecting them into a URL that points back to us
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# That gives us a chance to intercept and cache those, which are the actual multi-megabyte blobs we originally wanted to cache.
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# We to it twice, one for http and another for https.
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proxy_redirect ~^https://([^:/]+)(/.+)$ https://docker.proxy/forcecachesecure/$1/originalwas$2;
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proxy_redirect ~^http://([^:/]+)(/.+)$ http://docker.proxy/forcecacheinsecure/$1/originalwas$2;
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}
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# handling for the redirect case explained above, with https.
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# The $realHost and $realPath variables come from a map defined at the top of this file.
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location /forcecachesecure {
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proxy_pass https://$realHost$realPath;
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proxy_cache cache;
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add_header X-Docker-Caching-Proxy-Real-Proto https;
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add_header X-Docker-Caching-Proxy-Real-Host $realHost;
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add_header X-Docker-Caching-Proxy-Real-Path $realPath;
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}
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# handling for the redirect case explained above, with http.
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# The $realHost and $realPath variables come from a map defined at the top of this file.
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location /forcecacheinsecure {
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proxy_pass http://$realHost$realPath;
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proxy_cache cache;
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add_header X-Docker-Caching-Proxy-Real-Proto http;
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add_header X-Docker-Caching-Proxy-Real-Host $realHost;
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add_header X-Docker-Caching-Proxy-Real-Path $realPath;
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}
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}
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}
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Loading…
Reference in New Issue