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[WIP] THREESCALE-10164 Including the env var LARGE_CLIENT_HEADER_BUFFERS #1429

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[WIP] THREESCALE-10164 Including the env var LARGE_CLIENT_HEADER_BUFFERS #1429

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8a4fb61
Including the env var LARGE_CLIENT_HEADER_BUFFERS
perylemke Nov 20, 2023
6498eea
Update doc/parameters.md
perylemke Nov 20, 2023
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7 changes: 7 additions & 0 deletions doc/parameters.md
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Original file line number Diff line number Diff line change
Expand Up @@ -478,6 +478,13 @@ connections.
By default Gateway does not enable it, and the keepalive timeout on nginx is set
to [75 seconds](http://nginx.org/en/docs/http/ngx_http_core_module.html#keepalive_timeout)

### `LARGE_CLIENT_HEADER_BUFFERS`

**Default:** 4 8k
**Value:** string

This environment variable sets the maximum number and size of buffers for reading large client request headers. A request line cannot exceed the size of one buffer, or the client receives a 414 (Request-URI Too Large) error. A request header field cannot exceed the size of one buffer or the client receives a 400 (Bad Request) error. Buffers are allocated only when necessary, with a default size of [8K](http://nginx.org/en/docs/http/ngx_http_core_module.html#large_client_header_buffers) bytes. After processing a request, if the connection transitions into the keep-alive state, these buffers are released.


### `APICAST_CACHE_STATUS_CODES`

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2 changes: 2 additions & 0 deletions gateway/src/apicast/cli/environment.lua
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Expand Up @@ -129,6 +129,7 @@ _M.default_environment = 'production'
-- @tfield ?string opentelemetry_config_file opentelemetry config file to load
-- @tfield ?string upstream_retry_cases error cases where the call to the upstream should be retried
-- follows the same format as https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_next_upstream
-- @tfield ?string large_client_header_buffers sets the maximum number and size of buffers used for reading large client request header
-- @tfield ?policy_chain policy_chain @{policy_chain} instance
-- @tfield ?{string,...} nameservers list of nameservers
-- @tfield ?string package.path path to load Lua files
Expand All @@ -149,6 +150,7 @@ _M.default_config = {
opentelemetry_config_file = env_value_ref('OPENTELEMETRY_CONFIG'),
upstream_retry_cases = env_value_ref('APICAST_UPSTREAM_RETRY_CASES'),
http_keepalive_timeout = env_value_ref('HTTP_KEEPALIVE_TIMEOUT'),
large_client_header_buffers = env_value_ref('LARGE_CLIENT_HEADER_BUFFERS'),
policy_chain = require('apicast.policy_chain').default(),
nameservers = parse_nameservers(),
worker_processes = cpus() or 'auto',
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