280 lines
11 KiB
Nginx Configuration File
280 lines
11 KiB
Nginx Configuration File
user nginx;
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worker_processes auto;
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# error log config comes from external file created by entrypoint, to toggle debug on/off.
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include /etc/nginx/error.log.debug.warn;
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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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map_hash_bucket_size 128;
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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 debugging '$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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'"CONNECT-HOST: $connect_host" "CONNECT-PORT: $connect_port" "CONNECT-ADDR: $connect_addr" '
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'"PROXY-HOST: $proxy_host" "UPSTREAM-REDIRECT: $upstream_http_location" "CACHE-STATUS: $upstream_cache_status" '
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'"AUTH: $http_authorization" ' ;
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log_format debug_proxy 'CONNECTPROXY: $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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'"CONNECT-HOST: $connect_host" "CONNECT-PORT: $connect_port" "CONNECT-ADDR: $connect_addr" "INTERCEPTED: $interceptedHost" '
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'"PROXY-HOST: $proxy_host" "UPSTREAM-REDIRECT: $upstream_http_location" "CACHE-STATUS: $upstream_cache_status" '
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'"AUTH: $http_authorization" ' ;
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log_format tweaked '$upstream_cache_status [$time_local] "$uri" '
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'$status $body_bytes_sent '
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'"HOST:$host" '
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'"PROXY-HOST:$proxy_host" "UPSTREAM:$upstream_addr" ';
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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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# A map to enable authentication to some specific docker registries.
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# This is auto-generated by the entrypoint.sh based on environment variables
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map $host $dockerAuth {
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hostnames;
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include /etc/nginx/docker.auth.map;
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default "";
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}
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# @TODO: actually for auth.docker.io, if we want to support multiple authentications, we'll need to decide
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# @TODO: based not only on the hostname, but also URI (/token) and query string (?scope)
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# @TODO: I wonder if this would help gcr.io and quay.io with authentication also....
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map $dockerAuth $finalAuth {
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"" "$http_authorization"; # if empty, keep the original passed-in from the docker client.
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default "Basic $dockerAuth"; # if not empty, add the Basic preamble to the auth
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}
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# Map to decide which hosts get directed to the caching portion.
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# This is automatically generated from the list of cached registries, plus a few fixed hosts
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# By default, we don't intercept, allowing free flow of non-registry traffic
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map $connect_host $interceptedHost {
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hostnames;
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include /etc/nginx/docker.intercept.map;
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default "$connect_addr"; # $connect_addr is 'IP address and port of the remote host, e.g. "192.168.1.5:12345". IP address is resolved from host name of CONNECT request line.'
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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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# The proxy director layer, listens on 3128
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server {
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listen 3128;
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server_name _;
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# dont log the CONNECT proxy.
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#access_log /var/log/nginx/access.log debug_proxy;
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access_log off;
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proxy_connect;
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proxy_connect_address $interceptedHost;
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proxy_max_temp_file_size 0;
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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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include /etc/nginx/resolvers.conf;
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# forward proxy for non-CONNECT request
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location / {
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add_header "Content-type" "text/plain" always;
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return 200 "docker-registry-proxy: The docker caching proxy is working!";
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}
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location /ca.crt {
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alias /ca/ca.crt;
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}
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location /setup/systemd {
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add_header "Content-type" "text/plain" always;
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return 200 '
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set -e
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if [ ! -d /etc/systemd ]; then
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echo "Not a systemd system"
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exit 1
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fi
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mkdir -p /etc/systemd/system/docker.service.d
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cat << EOD > /etc/systemd/system/docker.service.d/http-proxy.conf
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[Service]
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Environment="HTTPS_PROXY=$scheme://$http_host/"
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EOD
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# Get the CA certificate from the proxy and make it a trusted root.
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curl $scheme://$http_host/ca.crt > /usr/share/ca-certificates/docker_registry_proxy.crt
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if fgrep -q "docker_registry_proxy.crt" /etc/ca-certificates.conf ; then
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echo "certificate refreshed"
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else
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echo "docker_registry_proxy.crt" >> /etc/ca-certificates.conf
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fi
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update-ca-certificates --fresh
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# Reload systemd
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systemctl daemon-reload
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# Restart dockerd
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systemctl restart docker.service
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echo "Docker configured with HTTPS_PROXY=$scheme://$http_host/"
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';
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} # end location /setup/systemd
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} # end server
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# The caching layer
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server {
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# Listen on both 80 and 443, for all hostnames.
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# actually could be 443 or 444, depending on debug. this is now generated by the entrypoint.
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listen 80 default_server;
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include /etc/nginx/caching.layer.listen;
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server_name _;
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# Do some tweaked logging.
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access_log /var/log/nginx/access.log tweaked;
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# Use the generated certificates, they contain names for all the proxied registries.
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ssl_certificate /certs/fullchain.pem;
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ssl_certificate_key /certs/web.key;
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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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include /etc/nginx/resolvers.conf;
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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 ($request_method = POST) {
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return 405 "POST method is not allowed";
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}
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if ($request_method = PUT) {
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return 405 "PUT method is not allowed";
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}
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if ($request_method = DELETE) {
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return 405 "DELETE method is not allowed";
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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 880s;
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# Cache all 200, 301, 302, and 307 (emitted by private registries) for 60 days.
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proxy_cache_valid 200 301 302 307 60d;
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# Some extra settings to maximize cache hits and efficiency
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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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# Hide/ignore headers from caching. S3 especially likes to send Expires headers in the past in some situations.
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proxy_hide_header Set-Cookie;
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proxy_ignore_headers X-Accel-Expires Expires Cache-Control Set-Cookie;
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# Add the authentication info, if the map matched the target domain.
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proxy_set_header Authorization $finalAuth;
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# Use SNI during the TLS handshake with the upstream.
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proxy_ssl_server_name on;
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# This comes from a include file generated by the entrypoint.
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include /etc/nginx/docker.verify.ssl.conf;
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# Block API v1. We dont know how to handle these.
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# Docker-client should start with v2 and fallback to v1 if something fails, for example, if authentication failed to a protected v2 resource.
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location /v1 {
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return 405 "docker-registry-proxy: docker is trying to use v1 API. Either the image does not exist upstream, or you need to configure docker-registry-proxy to authenticate against $host";
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}
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# for the /v2/..../blobs/.... URIs, do cache, and treat redirects.
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location ~ ^/v2/(.*)/blobs/ {
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proxy_pass https://$targetHost;
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proxy_cache cache;
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add_header X-Docker-Caching-Proxy-Debug-Cache "yes:blobs";
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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.caching.proxy.internal/forcecachesecure/$1/originalwas$2;
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proxy_redirect ~^http://([^:/]+)(/.+)$ http://docker.caching.proxy.internal/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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# Change the cache key, so that we can cache signed S3 requests and such. Only host and path are considered.
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proxy_cache_key $proxy_host$uri;
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add_header X-Docker-Caching-Proxy-Debug-Cache "yes:forcecachesecure";
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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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# Change the cache key, so that we can cache signed S3 requests and such. Only host and path are considered.
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proxy_cache_key $proxy_host$uri;
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add_header X-Docker-Caching-Proxy-Debug-Cache "yes:forcecacheinsecure";
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}
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# by default, dont cache anything.
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location / {
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proxy_pass https://$targetHost;
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proxy_cache off;
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add_header X-Docker-Caching-Proxy-Debug-Cache "no:default";
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}
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}
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}
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