Mercurial > hg > nginx
annotate README @ 8922:be08b858086a quic
HTTP/3: http3_hq directive and NGX_HTTP_V3_HQ macro.
Listen quic parameter is no longer supported.
| author | Roman Arutyunyan <arut@nginx.com> |
|---|---|
| date | Sat, 04 Dec 2021 10:52:55 +0300 |
| parents | 4d871baeacd2 |
| children | 651cc905b7c2 |
| rev | line source |
|---|---|
| 8366 | 1 Experimental QUIC support for nginx |
| 2 ----------------------------------- | |
| 3 | |
| 4 1. Introduction | |
| 5 2. Installing | |
| 6 3. Configuration | |
| 7 4. Clients | |
| 8 5. Troubleshooting | |
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9 6. Contributing |
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10 7. Links |
| 8366 | 11 |
| 12 1. Introduction | |
| 13 | |
| 14 This is an experimental QUIC [1] / HTTP/3 [2] support for nginx. | |
| 15 | |
| 16 The code is developed in a separate "quic" branch available | |
| 17 at https://hg.nginx.org/nginx-quic. Currently it is based | |
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18 on nginx mainline 1.21.x. We merge new nginx releases into |
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19 this branch regularly. |
| 8366 | 20 |
| 21 The project code base is under the same BSD license as nginx. | |
| 22 | |
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23 The code is currently at a beta level of quality and should not |
| 8366 | 24 be used in production. |
| 25 | |
| 26 We are working on improving HTTP/3 support with the goal of | |
| 27 integrating it to the main NGINX codebase. Expect frequent | |
| 28 updates of this code and don't rely on it for whatever purpose. | |
| 29 | |
| 30 We'll be grateful for any feedback and code submissions however | |
| 31 we don't bear any responsibilities for any issues with this code. | |
| 32 | |
| 33 You can always contact us via nginx-devel mailing list [3]. | |
| 34 | |
| 35 What works now: | |
| 36 | |
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37 Currently we support IETF-QUIC draft-29 through final RFC documents. |
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38 Earlier drafts are NOT supported as they have incompatible wire format. |
| 8366 | 39 |
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40 nginx should be able to respond to HTTP/3 requests over QUIC and |
| 8366 | 41 it should be possible to upload and download big files without errors. |
| 42 | |
| 43 + The handshake completes successfully | |
| 44 + One endpoint can update keys and its peer responds correctly | |
| 8390 | 45 + 0-RTT data is being received and acted on |
| 8366 | 46 + Connection is established using TLS Resume Ticket |
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47 + A handshake that includes a Retry packet completes successfully |
| 8366 | 48 + Stream data is being exchanged and ACK'ed |
| 49 + An H3 transaction succeeded | |
| 50 + One or both endpoints insert entries into dynamic table and | |
| 51 subsequently reference them from header blocks | |
| 8527 | 52 + Version Negotiation packet is sent to client with unknown version |
| 53 + Lost packets are detected and retransmitted properly | |
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54 + Clients may migrate to new address |
| 8366 | 55 |
| 56 Not (yet) supported features: | |
| 57 | |
| 8527 | 58 - Explicit Congestion Notification (ECN) as specified in quic-recovery [5] |
| 8366 | 59 - A connection with the spin bit succeeds and the bit is spinning |
| 60 - Structured Logging | |
| 61 | |
| 62 Since the code is experimental and still under development, | |
| 63 a lot of things may not work as expected, for example: | |
| 64 | |
| 65 - Flow control mechanism is basic and intended to avoid CPU hog and make | |
| 66 simple interactions possible | |
| 67 | |
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68 - Not all protocol requirements are strictly followed; some of checks are |
| 8366 | 69 omitted for the sake of simplicity of initial implementation |
| 70 | |
| 71 2. Installing | |
| 72 | |
| 73 You will need a BoringSSL [4] library that provides QUIC support | |
| 74 | |
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75 $ hg clone -b quic https://hg.nginx.org/nginx-quic |
| 8366 | 76 $ cd nginx-quic |
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77 $ ./auto/configure --with-debug --with-http_v3_module \ |
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78 --with-cc-opt="-I../boringssl/include" \ |
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79 --with-ld-opt="-L../boringssl/build/ssl \ |
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80 -L../boringssl/build/crypto" |
| 8366 | 81 $ make |
| 82 | |
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83 When configuring nginx, you can enable QUIC and HTTP/3 using the |
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84 following new configuration options: |
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85 |
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86 --with-http_v3_module - enable QUIC and HTTP/3 |
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87 --with-http_quic_module - enable QUIC for older HTTP versions |
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88 --with-stream_quic_module - enable QUIC in Stream |
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89 |
| 8366 | 90 3. Configuration |
| 91 | |
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92 The HTTP "listen" directive got a new option "http3" which enables |
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93 HTTP/3 over QUIC on the specified port. |
| 8366 | 94 |
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95 The Stream "listen" directive got a new option "quic" which enables |
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96 QUIC as client transport protocol instead of TCP or plain UDP. |
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97 |
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98 Along with "http3" or "quic", you also have to specify "reuseport" |
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99 option [6] to make it work properly with multiple workers. |
| 8366 | 100 |
| 101 A number of directives were added that specify transport parameter values: | |
| 102 | |
| 103 quic_max_idle_timeout | |
| 104 quic_max_ack_delay | |
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105 quic_max_udp_payload_size |
| 8366 | 106 quic_initial_max_data |
| 107 quic_initial_max_stream_data_bidi_local | |
| 108 quic_initial_max_stream_data_bidi_remote | |
| 109 quic_initial_max_stream_data_uni | |
| 110 quic_initial_max_streams_bidi | |
| 111 quic_initial_max_streams_uni | |
| 112 quic_ack_delay_exponent | |
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113 quic_disable_active_migration |
| 8366 | 114 quic_active_connection_id_limit |
| 115 | |
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116 To enable address validation: |
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117 |
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118 quic_retry on; |
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119 |
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120 To enable 0-RTT: |
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121 |
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122 ssl_early_data on; |
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123 |
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124 Make sure that TLS 1.3 is configured which is required for QUIC: |
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125 |
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126 ssl_protocols TLSv1.3; |
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127 |
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128 To enable GSO (Generic Segmentation Offloading): |
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129 |
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130 quic_gso on; |
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131 |
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132 By default this Linux-specific optimization [8] is disabled. |
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133 Enable if your network interface is configured to support GSO. |
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134 |
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135 A number of directives were added that configure HTTP/3: |
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136 |
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137 http3_max_table_capacity |
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138 http3_max_blocked_streams |
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139 http3_max_concurrent_pushes |
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140 http3_push |
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141 http3_push_preload |
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142 http3_hq (requires NGX_HTTP_V3_HQ macro) |
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143 |
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144 An additional variable is available: $quic. |
| 8366 | 145 The value of $quic is "quic" if QUIC connection is used, |
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146 or an empty string otherwise. |
| 8366 | 147 |
| 148 Example configuration: | |
| 149 | |
| 150 http { | |
| 151 log_format quic '$remote_addr - $remote_user [$time_local] ' | |
| 152 '"$request" $status $body_bytes_sent ' | |
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153 '"$http_referer" "$http_user_agent" "$quic"'; |
| 8366 | 154 |
| 155 access_log logs/access.log quic; | |
| 156 | |
| 157 server { | |
| 158 # for better compatibility it's recommended | |
| 159 # to use the same port for quic and https | |
| 160 listen 8443 http3 reuseport; | |
| 161 listen 8443 ssl; | |
| 162 | |
| 163 ssl_certificate certs/example.com.crt; | |
| 164 ssl_certificate_key certs/example.com.key; | |
| 165 ssl_protocols TLSv1.3; | |
| 166 | |
| 167 location / { | |
| 168 # required for browsers to direct them into quic port | |
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169 add_header Alt-Svc 'h3=":8443"; ma=86400'; |
| 8366 | 170 } |
| 171 } | |
| 172 } | |
| 173 | |
| 174 4. Clients | |
| 175 | |
| 176 * Browsers | |
| 177 | |
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178 Known to work: Firefox 80+ and Chrome 85+ (QUIC draft 29+) |
| 8366 | 179 |
| 180 Beware of strange issues: sometimes browser may decide to ignore QUIC | |
| 181 Cache clearing/restart might help. Always check access.log and | |
| 182 error.log to make sure you are using HTTP/3 and not TCP https. | |
| 183 | |
| 184 + to enable QUIC in Firefox, set the following in 'about:config': | |
| 185 network.http.http3.enabled = true | |
| 186 | |
| 187 + to enable QUIC in Chrome, enable it on command line and force it | |
| 188 on your site: | |
| 189 | |
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190 $ ./chrome --enable-quic --quic-version=h3-29 \ |
| 8366 | 191 --origin-to-force-quic-on=example.com:8443 |
| 192 | |
| 193 * Console clients | |
| 194 | |
| 195 Known to work: ngtcp2, firefox's neqo and chromium's console clients: | |
| 196 | |
| 197 $ examples/client 127.0.0.1 8443 https://example.com:8443/index.html | |
| 198 | |
| 199 $ ./neqo-client https://127.0.0.1:8443/ | |
| 200 | |
| 201 $ chromium-build/out/my_build/quic_client http://example.com:8443 \ | |
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202 --quic_version=h3-29 \ |
| 8366 | 203 --allow_unknown_root_cert \ |
| 204 --disable_certificate_verification | |
| 205 | |
| 206 | |
| 207 If you've got it right, in the access log you should see something like: | |
| 208 | |
| 209 127.0.0.1 - - [24/Apr/2020:11:27:29 +0300] "GET / HTTP/3" 200 805 "-" | |
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210 "nghttp3/ngtcp2 client" "quic" |
| 8366 | 211 |
| 212 | |
| 213 5. Troubleshooting | |
| 214 | |
| 215 Here are some tips that may help you to identify problems: | |
| 216 | |
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217 + Ensure you are building with proper SSL library that supports QUIC |
| 8366 | 218 |
| 219 + Ensure you are using the proper SSL library in runtime | |
| 220 (`nginx -V` will show you what you are using) | |
| 221 | |
| 222 + Ensure your client is actually sending QUIC requests | |
| 223 (see "Clients" section about browsers and cache) | |
| 224 | |
| 225 We recommend to start with simple console client like ngtcp2 | |
| 226 to ensure you've got server configured properly before trying | |
| 8395 | 227 with real browsers that may be very picky with certificates, |
| 8366 | 228 for example. |
| 229 | |
| 230 + Build nginx with debug support [7] and check your debug log. | |
| 231 It should contain all details about connection and why it | |
| 232 failed. All related messages contain "quic " prefix and can | |
| 233 be easily filtered out. | |
| 234 | |
| 235 + If you want to investigate deeper, you may want to enable | |
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236 additional debugging in src/event/quic/ngx_event_quic_connection.h: |
| 8366 | 237 |
| 238 #define NGX_QUIC_DEBUG_PACKETS | |
| 239 #define NGX_QUIC_DEBUG_FRAMES | |
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240 #define NGX_QUIC_DEBUG_ALLOC |
| 8366 | 241 #define NGX_QUIC_DEBUG_CRYPTO |
| 242 | |
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243 6. Contributing |
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244 |
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Vladimir Homutov <vl@nginx.com>
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245 If you are willing to contribute, please refer to |
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246 http://nginx.org/en/docs/contributing_changes.html |
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247 |
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248 7. Links |
| 8366 | 249 |
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README: updated after QUIC RFC publication, nginx 1.21 rebase.
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250 [1] https://datatracker.ietf.org/doc/html/rfc9000 |
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251 [2] https://datatracker.ietf.org/doc/html/draft-ietf-quic-http |
| 8366 | 252 [3] https://mailman.nginx.org/mailman/listinfo/nginx-devel |
| 253 [4] https://boringssl.googlesource.com/boringssl/ | |
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254 [5] https://datatracker.ietf.org/doc/html/rfc9002 |
| 8366 | 255 [6] https://nginx.org/en/docs/http/ngx_http_core_module.html#listen |
| 256 [7] https://nginx.org/en/docs/debugging_log.html | |
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QUIC: updated README with GSO details.
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257 [8] http://vger.kernel.org/lpc_net2018_talks/willemdebruijn-lpc2018-udpgso-paper-DRAFT-1.pdf |