Support of Google Artifact Registry (GAR)

[vitaliihrynko1]

Hello,

I am trying to use docker-registry-proxy to proxy and cache request to GAR domains, but it does not work as expected.
docker pull:

docker pull us-docker.pkg.dev/<project>/<repo>/test-vitalii:test1
test1: Pulling from <project>/<repo>/test-vitalii
70ba6f391a98: Retrying in 5 seconds 
^C

docker-registry-proxy logs:

{"access_time":"08/May/2024:11:14:54 +0000","upstream_cache_status":"","method":"GET","uri":"/v2/","request_type":"unknown","status":"401","bytes_sent":"96","upstream_response_time":"0.860","host":"us-docker.pkg.dev","proxy_host":"us-docker.pkg.dev","upstream":"64.233.165.82:443"}
{"access_time":"08/May/2024:11:14:55 +0000","upstream_cache_status":"","method":"GET","uri":"/v2/token","request_type":"unknown","status":"200","bytes_sent":"3231","upstream_response_time":"0.928","host":"us-docker.pkg.dev","proxy_host":"us-docker.pkg.dev","upstream":"64.233.165.82:443"}
2024/05/08 11:14:55 [error] 180#180: *13 connect() to [2a00:1450:4010:c08::52]:443 failed (101: Network unreachable) while connecting to upstream, client: 127.0.0.1, server: proxy_caching_, request: "HEAD /v2/<project>/<repo>/test-vitalii/manifests/test1 HTTP/1.1", upstream: "https://[2a00:1450:4010:c08::52]:443/v2/<project>/<repo>/test-vitalii/manifests/test1", host: "us-docker.pkg.dev"
2024/05/08 11:14:55 [warn] 180#180: *13 upstream server temporarily disabled while connecting to upstream, client: 127.0.0.1, server: proxy_caching_, request: "HEAD /v2/<project>/<repo>/test-vitalii/manifests/test1 HTTP/1.1", upstream: "https://[2a00:1450:4010:c08::52]:443/v2/<project>/<repo>/test-vitalii/manifests/test1", host: "us-docker.pkg.dev"
{"access_time":"08/May/2024:11:14:56 +0000","upstream_cache_status":"MISS","method":"HEAD","uri":"/v2/<project>/<repo>/test-vitalii/manifests/test1","request_type":"manifest-default-disabled","status":"200","bytes_sent":"0","upstream_response_time":"0.000, 1.180","host":"us-docker.pkg.dev","proxy_host":"us-docker.pkg.dev","upstream":"[2a00:1450:4010:c08::52]:443, 64.233.165.82:443"}
2024/05/08 11:14:57 [error] 181#181: *20 invalid URL prefix in "/artifacts-downloads/namespaces/<project>/repositories/<repo>/downloads/ALJkh8N9ipaC35ZyJtHLLl0clVcnheREkl_Eof40VoUJD44gmFvMAO8JXiPHnEDp-X9z2YDyPL3igSgr2bCLaGsPOb2sprYBdcy0WHlT9ow1jd9LXdcVRYAIF-MUP7B-LZRVurcKQPWWnWTklv3K2HhUymbSQIUv9vXVa4n50h9qGfUtXbnIRT3gHBX1TJwI9tABdwfZGgAzuf1m64-RyGOjIk64Uub3Ib4_OoJZZM5gfBrnuEpQRcj25avdhZS2XRSqqsEUpakOBZudgAcbKquQ-vJkxGM_OE5W9bnqlbWdkVZBFFKjg-ZFj08b_pOxgaIok9UDp-JFdlXSU_MggDH9o7gPwOln4vHbfZ67QTB2T0BOO48cbVNejZBULr4EtEWRmQluKWtH33Lch5ViWcyAG9qJOuksSIfdI-ChOkpQjpx0hcL64N9mpfGPKT8OSxy1msvQ-yLPaqdTg05cQtv2QUdV_vcRR1yhpIfIrjgJy4C8prwYeDvkUlsrOe2X-SvfadMKI6TQBy4FtF57eG7ZXMRY4JVPQP7RmAKDDc02S6DEmIVQ71qI3RVWYa_z05Gv4REJm2YtFNR8IS5X9CbqDTKeMqNjhy9tgxyEMuNzG1t6jcaJdEBvoF_AbEhhDthdkpW-vUrUAf4alFxm_Wub9Bqz71tQaXnuEQsbsl5HRsQCpBa58T1hV8wefpk_cakKYUnmbMkUNzitLRJZJ5Z2_wMZwlSU98-bFlqvAa68X-qsYO_aNsh4YhS94W32bnGENFT_f8XCvilNEeWU3oAFGES-yVaWk0RGfPNE163a4q83ErmwWBg4nZiai5K_SMBlweIPX-X_54Z8fyYpdobIg5lGt281xyvq3Vq9yfIIw_Zf0e1THCQ-_BGmvK9IKQUmAcsJfKrNrcisJQ_zJmuxV9rqlz0x0hIaXHGn0Ax5ayE6DIyPjRvBkMgthkXgo5GXV3ZTuPJkmL0ff4mU-BQurQWqoAceGXg4AUvk4HKXTqFMh6_-jT2zCJyADfzisHh6giHKX-SmZLFAAIB8X-mrXUH1xJbnZVcUnqmHupJnH0Jdy2mcM9JK0NfjbvMBd0isNTKPTA0NghMwFzD5lGcCVlBsUBqtZmuCfTdftmEP9U5MFeJAi7Q0r7gAU5KX1vIo30pbqrnGZIOxzPq62mALfP0jl8YJOJQ5Xt5o7vHgkO-Ku06nn7cLd1AxeLqz0ZP0HJHsyU54aD6EiNtYKwMNR7WMSiF4s6KfXWzZO-U-X7bZwICyzCAgFsxkYuVzyjmTXMPF1aR-dDhwk_UIiCVpYv-4eDC5hu3ytHEL50_DIdAUKpcXpv6U7MOmgnChzdya5XqUOt21ftf02pHQQs57a3o_rOy2ZRuxQ3qctguyplyBX0ACMnv-Y5-bN92Wwo-KYZfQcX1sUYeZa56uX7zw6qD1q2Yr5zy7Ezt7ptJHLirUlLmX2jQU3Tdf_4N-0aNGtvEgQPyzMCnKE4z1O_1lmA7AMwDj1Wev0uJUwkj0e0CbGrYHU6Lozcg96fNa5EQ-Dp8SfaT_iHBjwZQ4T_NF7dZaDz32KZqTOsKX_HxU2wAV0FYnan2fkzxVuzqa71aiwDx4O31GXV_oWxXQASJznh0R0B2f08KO0aRhU1pLFcyXDDCgxzRPNedzRtd2EXi7ZEqTsnOrkwi7qDmtuDY7UnzOfo3FkOhrMoXwYEzDLUWBYjALpxSP5EnpxJRQWxS_Cg70i7-thWq9rUqk-Ju6zlBMIwH0T_AqcEfKbnC5DFOJylh5cBsXEqKsksnAA-y5d9bqSOCB4WpJLqB-x6ZZ9riVD298daviM5Kf8xMK_rTfqurswMjvttAeWxlEm_BtAdKuQ4tRY4ciPK3pwFWy6DcrOhXMX

Looks like there is some redirection from /v2/ to /artifacts-download/ and nginx can not handle this.
Also I have added proxy_buffer settings under http section to handle big headers:

http {
    proxy_buffer_size   128k;
    proxy_buffers   4 256k;
...
...

Could you please advise a workaround or release a new version with GAR support?

Thanks,
Vitalii