ingress-nginx-helm/docs/user-guide/nginx-configuration/configmap.md

ConfigMaps

ConfigMaps allow you to decouple configuration artifacts from image content to keep containerized applications portable.

The ConfigMap API resource stores configuration data as key-value pairs. The data provides the configurations for system components for the nginx-controller.

In order to overwrite nginx-controller configuration values as seen in config.go, you can add key-value pairs to the data section of the config-map. For Example:

data:
  map-hash-bucket-size: "128"
  ssl-protocols: SSLv2

!!! important The key and values in a ConfigMap can only be strings. This means that we want a value with boolean values we need to quote the values, like "true" or "false". Same for numbers, like "100".

"Slice" types (defined below as `[]string` or `[]int`) can be provided as a comma-delimited string.

Configuration options

The following table shows a configuration option's name, type, and the default value:

name	type	default
add-headers	string	""
allow-backend-server-header	bool	"false"
hide-headers	string array	empty
access-log-params	string	""
access-log-path	string	"/var/log/nginx/access.log"
http-access-log-path	string	""
stream-access-log-path	string	""
enable-access-log-for-default-backend	bool	"false"
error-log-path	string	"/var/log/nginx/error.log"
enable-modsecurity	bool	"false"
modsecurity-snippet	string	""
enable-owasp-modsecurity-crs	bool	"false"
client-header-buffer-size	string	"1k"
client-header-timeout	int	60
client-body-buffer-size	string	"8k"
client-body-timeout	int	60
disable-access-log	bool	false
disable-ipv6	bool	false
disable-ipv6-dns	bool	false
enable-underscores-in-headers	bool	false
enable-ocsp	bool	false
ignore-invalid-headers	bool	true
retry-non-idempotent	bool	"false"
error-log-level	string	"notice"
http2-max-field-size	string	"4k"
http2-max-header-size	string	"16k"
http2-max-requests	int	1000
http2-max-concurrent-streams	int	1000
hsts	bool	"true"
hsts-include-subdomains	bool	"true"
hsts-max-age	string	"15724800"
hsts-preload	bool	"false"
keep-alive	int	75
keep-alive-requests	int	100
large-client-header-buffers	string	"4 8k"
log-format-escape-json	bool	"false"
log-format-upstream	string	$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" $request_length $request_time [$proxy_upstream_name] [$proxy_alternative_upstream_name] $upstream_addr $upstream_response_length $upstream_response_time $upstream_status $req_id
log-format-stream	string	[$remote_addr] [$time_local] $protocol $status $bytes_sent $bytes_received $session_time
enable-multi-accept	bool	"true"
max-worker-connections	int	16384
max-worker-open-files	int	0
map-hash-bucket-size	int	64
nginx-status-ipv4-whitelist	[]string	"127.0.0.1"
nginx-status-ipv6-whitelist	[]string	"::1"
proxy-real-ip-cidr	[]string	"0.0.0.0/0"
proxy-set-headers	string	""
server-name-hash-max-size	int	1024
server-name-hash-bucket-size	int	<size of the processor’s cache line>
proxy-headers-hash-max-size	int	512
proxy-headers-hash-bucket-size	int	64
plugins	[]string
reuse-port	bool	"true"
server-tokens	bool	"false"
ssl-ciphers	string	"ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384"
ssl-ecdh-curve	string	"auto"
ssl-dh-param	string	""
ssl-protocols	string	"TLSv1.2 TLSv1.3"
ssl-session-cache	bool	"true"
ssl-session-cache-size	string	"10m"
ssl-session-tickets	bool	"false"
ssl-session-ticket-key	string	<Randomly Generated>
ssl-session-timeout	string	"10m"
ssl-buffer-size	string	"4k"
use-proxy-protocol	bool	"false"
proxy-protocol-header-timeout	string	"5s"
use-gzip	bool	"false"
use-geoip	bool	"true"
use-geoip2	bool	"false"
enable-brotli	bool	"false"
brotli-level	int	4
brotli-types	string	"application/xml+rss application/atom+xml application/javascript application/x-javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/svg+xml image/x-icon text/css text/javascript text/plain text/x-component"
use-http2	bool	"true"
gzip-level	int	1
gzip-types	string	"application/atom+xml application/javascript application/x-javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/svg+xml image/x-icon text/css text/javascript text/plain text/x-component"
worker-processes	string	<Number of CPUs>
worker-cpu-affinity	string	""
worker-shutdown-timeout	string	"240s"
load-balance	string	"round_robin"
variables-hash-bucket-size	int	128
variables-hash-max-size	int	2048
upstream-keepalive-connections	int	320
upstream-keepalive-timeout	int	60
upstream-keepalive-requests	int	10000
limit-conn-zone-variable	string	"$binary_remote_addr"
proxy-stream-timeout	string	"600s"
proxy-stream-next-upstream	bool	"true"
proxy-stream-next-upstream-timeout	string	"600s"
proxy-stream-next-upstream-tries	int	3
proxy-stream-responses	int	1
bind-address	[]string	""
use-forwarded-headers	bool	"false"
enable-real-ip	bool	"false"
forwarded-for-header	string	"X-Forwarded-For"
compute-full-forwarded-for	bool	"false"
proxy-add-original-uri-header	bool	"false"
generate-request-id	bool	"true"
enable-opentracing	bool	"false"
opentracing-operation-name	string	""
opentracing-location-operation-name	string	""
zipkin-collector-host	string	""
zipkin-collector-port	int	9411
zipkin-service-name	string	"nginx"
zipkin-sample-rate	float	1.0
jaeger-collector-host	string	""
jaeger-collector-port	int	6831
jaeger-endpoint	string	""
jaeger-service-name	string	"nginx"
jaeger-propagation-format	string	"jaeger"
jaeger-sampler-type	string	"const"
jaeger-sampler-param	string	"1"
jaeger-sampler-host	string	"http://127.0.0.1"
jaeger-sampler-port	int	5778
jaeger-trace-context-header-name	string	uber-trace-id
jaeger-debug-header	string	uber-debug-id
jaeger-baggage-header	string	jaeger-baggage
jaeger-trace-baggage-header-prefix	string	uberctx-
datadog-collector-host	string	""
datadog-collector-port	int	8126
datadog-service-name	string	"nginx"
datadog-environment	string	"prod"
datadog-operation-name-override	string	"nginx.handle"
datadog-priority-sampling	bool	"true"
datadog-sample-rate	float	1.0
main-snippet	string	""
http-snippet	string	""
server-snippet	string	""
location-snippet	string	""
custom-http-errors	[]int	[]int{}
proxy-body-size	string	"1m"
proxy-connect-timeout	int	5
proxy-read-timeout	int	60
proxy-send-timeout	int	60
proxy-buffers-number	int	4
proxy-buffer-size	string	"4k"
proxy-cookie-path	string	"off"
proxy-cookie-domain	string	"off"
proxy-next-upstream	string	"error timeout"
proxy-next-upstream-timeout	int	0
proxy-next-upstream-tries	int	3
proxy-redirect-from	string	"off"
proxy-request-buffering	string	"on"
ssl-redirect	bool	"true"
whitelist-source-range	[]string	[]string{}
skip-access-log-urls	[]string	[]string{}
limit-rate	int	0
limit-rate-after	int	0
lua-shared-dicts	string	""
http-redirect-code	int	308
proxy-buffering	string	"off"
limit-req-status-code	int	503
limit-conn-status-code	int	503
no-tls-redirect-locations	string	"/.well-known/acme-challenge"
global-auth-url	string	""
global-auth-method	string	""
global-auth-signin	string	""
global-auth-signin-redirect-param	string	"rd"
global-auth-response-headers	string	""
global-auth-request-redirect	string	""
global-auth-snippet	string	""
global-auth-cache-key	string	""
global-auth-cache-duration	string	"200 202 401 5m"
no-auth-locations	string	"/.well-known/acme-challenge"
block-cidrs	[]string	""
block-user-agents	[]string	""
block-referers	[]string	""
proxy-ssl-location-only	bool	"false"
default-type	string	"text/html"
global-rate-limit-memcached-host	string	""
global-rate-limit-memcached-port	int	11211
global-rate-limit-memcached-connect-timeout	int	50
global-rate-limit-memcached-max-idle-timeout	int	10000
global-rate-limit-memcached-pool-size	int	50
global-rate-limit-status-code	int	429

add-headers

Sets custom headers from named configmap before sending traffic to the client. See proxy-set-headers. example

allow-backend-server-header

Enables the return of the header Server from the backend instead of the generic nginx string. default: is disabled

hide-headers

Sets additional header that will not be passed from the upstream server to the client response. default: empty

References: http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_hide_header

access-log-params

Additional params for access_log. For example, buffer=16k, gzip, flush=1m

References: http://nginx.org/en/docs/http/ngx_http_log_module.html#access_log

access-log-path

Access log path for both http and stream context. Goes to /var/log/nginx/access.log by default.

Note: the file /var/log/nginx/access.log is a symlink to /dev/stdout

http-access-log-path

Access log path for http context globally. default: ""

Note: If not specified, the access-log-path will be used.

stream-access-log-path

Access log path for stream context globally. default: ""

Note: If not specified, the access-log-path will be used.

enable-access-log-for-default-backend

Enables logging access to default backend. default: is disabled.

error-log-path

Error log path. Goes to /var/log/nginx/error.log by default.

Note: the file /var/log/nginx/error.log is a symlink to /dev/stderr

References: http://nginx.org/en/docs/ngx_core_module.html#error_log

enable-modsecurity

Enables the modsecurity module for NGINX. default: is disabled

enable-owasp-modsecurity-crs

Enables the OWASP ModSecurity Core Rule Set (CRS). default: is disabled

modsecurity-snippet

Adds custom rules to modsecurity section of nginx configuration

client-header-buffer-size

Allows to configure a custom buffer size for reading client request header.

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#client_header_buffer_size

client-header-timeout

Defines a timeout for reading client request header, in seconds.

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#client_header_timeout

client-body-buffer-size

Sets buffer size for reading client request body.

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#client_body_buffer_size

client-body-timeout

Defines a timeout for reading client request body, in seconds.

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#client_body_timeout

disable-access-log

Disables the Access Log from the entire Ingress Controller. default: '"false"'

References: http://nginx.org/en/docs/http/ngx_http_log_module.html#access_log

disable-ipv6

Disable listening on IPV6. default: false; IPv6 listening is enabled

disable-ipv6-dns

Disable IPV6 for nginx DNS resolver. default: false; IPv6 resolving enabled.

enable-underscores-in-headers

Enables underscores in header names. default: is disabled

enable-ocsp

Enables Online Certificate Status Protocol stapling (OCSP) support. default: is disabled

ignore-invalid-headers

Set if header fields with invalid names should be ignored. default: is enabled

retry-non-idempotent

Since 1.9.13 NGINX will not retry non-idempotent requests (POST, LOCK, PATCH) in case of an error in the upstream server. The previous behavior can be restored using the value "true".

error-log-level

Configures the logging level of errors. Log levels above are listed in the order of increasing severity.

References: http://nginx.org/en/docs/ngx_core_module.html#error_log

http2-max-field-size

Limits the maximum size of an HPACK-compressed request header field.

References: https://nginx.org/en/docs/http/ngx_http_v2_module.html#http2_max_field_size

http2-max-header-size

Limits the maximum size of the entire request header list after HPACK decompression.

References: https://nginx.org/en/docs/http/ngx_http_v2_module.html#http2_max_header_size

http2-max-requests

Sets the maximum number of requests (including push requests) that can be served through one HTTP/2 connection, after which the next client request will lead to connection closing and the need of establishing a new connection.

References: http://nginx.org/en/docs/http/ngx_http_v2_module.html#http2_max_requests

http2-max-concurrent-streams

Sets the maximum number of concurrent HTTP/2 streams in a connection.

References: http://nginx.org/en/docs/http/ngx_http_v2_module.html#http2_max_concurrent_streams

hsts

Enables or disables the header HSTS in servers running SSL. HTTP Strict Transport Security (often abbreviated as HSTS) is a security feature (HTTP header) that tell browsers that it should only be communicated with using HTTPS, instead of using HTTP. It provides protection against protocol downgrade attacks and cookie theft.

References:

• https://developer.mozilla.org/en-US/docs/Web/Security/HTTP_strict_transport_security
• https://blog.qualys.com/securitylabs/2016/03/28/the-importance-of-a-proper-http-strict-transport-security-implementation-on-your-web-server

hsts-include-subdomains

Enables or disables the use of HSTS in all the subdomains of the server-name.

hsts-max-age

Sets the time, in seconds, that the browser should remember that this site is only to be accessed using HTTPS.

hsts-preload

Enables or disables the preload attribute in the HSTS feature (when it is enabled).

keep-alive

Sets the time during which a keep-alive client connection will stay open on the server side. The zero value disables keep-alive client connections.

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#keepalive_timeout

keep-alive-requests

Sets the maximum number of requests that can be served through one keep-alive connection.

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#keepalive_requests

large-client-header-buffers

Sets the maximum number and size of buffers used for reading large client request header. default: 4 8k

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#large_client_header_buffers

log-format-escape-json

Sets if the escape parameter allows JSON ("true") or default characters escaping in variables ("false") Sets the nginx log format.

log-format-upstream

Sets the nginx log format. Example for json output:

log-format-upstream: '{"time": "$time_iso8601", "remote_addr": "$proxy_protocol_addr", "x_forward_for": "$proxy_add_x_forwarded_for", "request_id": "$req_id",
  "remote_user": "$remote_user", "bytes_sent": $bytes_sent, "request_time": $request_time, "status": $status, "vhost": "$host", "request_proto": "$server_protocol",
  "path": "$uri", "request_query": "$args", "request_length": $request_length, "duration": $request_time,"method": "$request_method", "http_referrer": "$http_referer",
  "http_user_agent": "$http_user_agent" }'

Please check the log-format for definition of each field.

log-format-stream

Sets the nginx stream format.

enable-multi-accept

If disabled, a worker process will accept one new connection at a time. Otherwise, a worker process will accept all new connections at a time. default: true

References: http://nginx.org/en/docs/ngx_core_module.html#multi_accept

max-worker-connections

Sets the maximum number of simultaneous connections that can be opened by each worker process. 0 will use the value of max-worker-open-files. default: 16384

!!! tip Using 0 in scenarios of high load improves performance at the cost of increasing RAM utilization (even on idle).

max-worker-open-files

Sets the maximum number of files that can be opened by each worker process. The default of 0 means "max open files (system's limit) / worker-processes - 1024". default: 0

map-hash-bucket-size

Sets the bucket size for the map variables hash tables. The details of setting up hash tables are provided in a separate document.

proxy-real-ip-cidr

If use-forwarded-headers or use-proxy-protocol is enabled, proxy-real-ip-cidr defines the default IP/network address of your external load balancer. Can be a comma-separated list of CIDR blocks. default: "0.0.0.0/0"

proxy-set-headers

Sets custom headers from named configmap before sending traffic to backends. The value format is namespace/name. See example

server-name-hash-max-size

Sets the maximum size of the server names hash tables used in server names,map directive’s values, MIME types, names of request header strings, etc.

References: http://nginx.org/en/docs/hash.html

server-name-hash-bucket-size

Sets the size of the bucket for the server names hash tables.

References:

• http://nginx.org/en/docs/hash.html
• http://nginx.org/en/docs/http/ngx_http_core_module.html#server_names_hash_bucket_size

proxy-headers-hash-max-size

Sets the maximum size of the proxy headers hash tables.

References:

• http://nginx.org/en/docs/hash.html
• https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_headers_hash_max_size

reuse-port

Instructs NGINX to create an individual listening socket for each worker process (using the SO_REUSEPORT socket option), allowing a kernel to distribute incoming connections between worker processes default: true

proxy-headers-hash-bucket-size

Sets the size of the bucket for the proxy headers hash tables.

References:

• http://nginx.org/en/docs/hash.html
• https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_headers_hash_bucket_size

plugins

Activates plugins installed in /etc/nginx/lua/plugins. Refer to ingress-nginx plugins README for more information on how to write and install a plugin.

server-tokens

Send NGINX Server header in responses and display NGINX version in error pages. default: is disabled

ssl-ciphers

Sets the ciphers list to enable. The ciphers are specified in the format understood by the OpenSSL library.

The default cipher list is: ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384.

The ordering of a ciphersuite is very important because it decides which algorithms are going to be selected in priority. The recommendation above prioritizes algorithms that provide perfect forward secrecy.

DHE-based cyphers will not be available until DH parameter is configured Custom DH parameters for perfect forward secrecy

Please check the Mozilla SSL Configuration Generator.

Note: ssl_prefer_server_ciphers directive will be enabled by default for http context.

ssl-ecdh-curve

Specifies a curve for ECDHE ciphers.

References: http://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_ecdh_curve

ssl-dh-param

Sets the name of the secret that contains Diffie-Hellman key to help with "Perfect Forward Secrecy".

References:

• https://wiki.openssl.org/index.php/Diffie-Hellman_parameters
• https://wiki.mozilla.org/Security/Server_Side_TLS#DHE_handshake_and_dhparam
• http://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_dhparam

ssl-protocols

Sets the SSL protocols to use. The default is: TLSv1.2 TLSv1.3.

Please check the result of the configuration using https://ssllabs.com/ssltest/analyze.html or https://testssl.sh.

ssl-early-data

Enables or disables TLS 1.3 early data, also known as Zero Round Trip Time Resumption (0-RTT).

This requires ssl-protocols to have TLSv1.3 enabled. Enable this with caution, because requests sent within early data are subject to replay attacks.

ssl_early_data. The default is: false.

ssl-session-cache

Enables or disables the use of shared SSL cache among worker processes.

ssl-session-cache-size

Sets the size of the SSL shared session cache between all worker processes.

ssl-session-tickets

Enables or disables session resumption through TLS session tickets.

ssl-session-ticket-key

Sets the secret key used to encrypt and decrypt TLS session tickets. The value must be a valid base64 string. To create a ticket: openssl rand 80 | openssl enc -A -base64

TLS session ticket-key, by default, a randomly generated key is used.

ssl-session-timeout

Sets the time during which a client may reuse the session parameters stored in a cache.

ssl-buffer-size

Sets the size of the SSL buffer used for sending data. The default of 4k helps NGINX to improve TLS Time To First Byte (TTTFB).

References: https://www.igvita.com/2013/12/16/optimizing-nginx-tls-time-to-first-byte/

use-proxy-protocol

Enables or disables the PROXY protocol to receive client connection (real IP address) information passed through proxy servers and load balancers such as HAProxy and Amazon Elastic Load Balancer (ELB).

proxy-protocol-header-timeout

Sets the timeout value for receiving the proxy-protocol headers. The default of 5 seconds prevents the TLS passthrough handler from waiting indefinitely on a dropped connection. default: 5s

use-gzip

Enables or disables compression of HTTP responses using the "gzip" module. MIME types to compress are controlled by gzip-types. default: false

use-geoip

Enables or disables "geoip" module that creates variables with values depending on the client IP address, using the precompiled MaxMind databases. default: true

Note: MaxMind legacy databases are discontinued and will not receive updates after 2019-01-02, cf. discontinuation notice. Consider use-geoip2 below.

use-geoip2

Enables the geoip2 module for NGINX. Since 0.27.0 and due to a change in the MaxMind databases a license is required to have access to the databases. For this reason, it is required to define a new flag --maxmind-license-key in the ingress controller deployment to download the databases needed during the initialization of the ingress controller. Alternatively, it is possible to use a volume to mount the files /etc/nginx/geoip/GeoLite2-City.mmdb and /etc/nginx/geoip/GeoLite2-ASN.mmdb, avoiding the overhead of the download.

!!! important If the feature is enabled but the files are missing, GeoIP2 will not be enabled.

default: false

enable-brotli

Enables or disables compression of HTTP responses using the "brotli" module. The default mime type list to compress is: application/xml+rss application/atom+xml application/javascript application/x-javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/svg+xml image/x-icon text/css text/plain text/x-component. default: is disabled

Note: Brotli does not works in Safari < 11. For more information see https://caniuse.com/#feat=brotli

brotli-level

Sets the Brotli Compression Level that will be used. default: 4

brotli-types

Sets the MIME Types that will be compressed on-the-fly by brotli. default: application/xml+rss application/atom+xml application/javascript application/x-javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/svg+xml image/x-icon text/css text/plain text/x-component

use-http2

Enables or disables HTTP/2 support in secure connections.

gzip-level

Sets the gzip Compression Level that will be used. default: 1

gzip-min-length

Minimum length of responses to be returned to the client before it is eligible for gzip compression, in bytes. default: 256

gzip-types

Sets the MIME types in addition to "text/html" to compress. The special value "*" matches any MIME type. Responses with the "text/html" type are always compressed if use-gzip is enabled. default: application/atom+xml application/javascript application/x-javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/svg+xml image/x-icon text/css text/plain text/x-component.

worker-processes

Sets the number of worker processes. The default of "auto" means number of available CPU cores.

worker-cpu-affinity

Binds worker processes to the sets of CPUs. worker_cpu_affinity. By default worker processes are not bound to any specific CPUs. The value can be:

• "": empty string indicate no affinity is applied.
• cpumask: e.g. 0001 0010 0100 1000 to bind processes to specific cpus.
• auto: binding worker processes automatically to available CPUs.

worker-shutdown-timeout

Sets a timeout for Nginx to wait for worker to gracefully shutdown. default: "240s"

load-balance

Sets the algorithm to use for load balancing. The value can either be:

• round_robin: to use the default round robin loadbalancer
• ewma: to use the Peak EWMA method for routing (implementation)

The default is round_robin.

• To load balance using consistent hashing of IP or other variables, consider the nginx.ingress.kubernetes.io/upstream-hash-by annotation.
• To load balance using session cookies, consider the nginx.ingress.kubernetes.io/affinity annotation.

References: http://nginx.org/en/docs/http/load_balancing.html

variables-hash-bucket-size

Sets the bucket size for the variables hash table.

References: http://nginx.org/en/docs/http/ngx_http_map_module.html#variables_hash_bucket_size

variables-hash-max-size

Sets the maximum size of the variables hash table.

References: http://nginx.org/en/docs/http/ngx_http_map_module.html#variables_hash_max_size

upstream-keepalive-connections

Activates the cache for connections to upstream servers. The connections parameter sets the maximum number of idle keepalive connections to upstream servers that are preserved in the cache of each worker process. When this number is exceeded, the least recently used connections are closed. default: 320

References: http://nginx.org/en/docs/http/ngx_http_upstream_module.html#keepalive

upstream-keepalive-timeout

Sets a timeout during which an idle keepalive connection to an upstream server will stay open. default: 60

References: http://nginx.org/en/docs/http/ngx_http_upstream_module.html#keepalive_timeout

upstream-keepalive-requests

Sets the maximum number of requests that can be served through one keepalive connection. After the maximum number of requests is made, the connection is closed. default: 10000

References: http://nginx.org/en/docs/http/ngx_http_upstream_module.html#keepalive_requests

limit-conn-zone-variable

Sets parameters for a shared memory zone that will keep states for various keys of limit_conn_zone. The default of "$binary_remote_addr" variable’s size is always 4 bytes for IPv4 addresses or 16 bytes for IPv6 addresses.

proxy-stream-timeout

Sets the timeout between two successive read or write operations on client or proxied server connections. If no data is transmitted within this time, the connection is closed.

References: http://nginx.org/en/docs/stream/ngx_stream_proxy_module.html#proxy_timeout

proxy-stream-next-upstream

When a connection to the proxied server cannot be established, determines whether a client connection will be passed to the next server.

References: http://nginx.org/en/docs/stream/ngx_stream_proxy_module.html#proxy_next_upstream

proxy-stream-next-upstream-timeout

Limits the time allowed to pass a connection to the next server. The 0 value turns off this limitation.

References: http://nginx.org/en/docs/stream/ngx_stream_proxy_module.html#proxy_next_upstream_timeout

proxy-stream-next-upstream-tries

Limits the number of possible tries a request should be passed to the next server. The 0 value turns off this limitation.

References: http://nginx.org/en/docs/stream/ngx_stream_proxy_module.html#proxy_next_upstream_tries

proxy-stream-responses

Sets the number of datagrams expected from the proxied server in response to the client request if the UDP protocol is used.

References: http://nginx.org/en/docs/stream/ngx_stream_proxy_module.html#proxy_responses

bind-address

Sets the addresses on which the server will accept requests instead of *. It should be noted that these addresses must exist in the runtime environment or the controller will crash loop.

use-forwarded-headers

If true, NGINX passes the incoming X-Forwarded-* headers to upstreams. Use this option when NGINX is behind another L7 proxy / load balancer that is setting these headers.

If false, NGINX ignores incoming X-Forwarded-* headers, filling them with the request information it sees. Use this option if NGINX is exposed directly to the internet, or it's behind a L3/packet-based load balancer that doesn't alter the source IP in the packets.

enable-real-ip

enable-real-ip enables the configuration of http://nginx.org/en/docs/http/ngx_http_realip_module.html. Specific attributes of the module can be configured further by using forwarded-for-header and proxy-real-ip-cidr settings.

forwarded-for-header

Sets the header field for identifying the originating IP address of a client. default: X-Forwarded-For

compute-full-forwarded-for

Append the remote address to the X-Forwarded-For header instead of replacing it. When this option is enabled, the upstream application is responsible for extracting the client IP based on its own list of trusted proxies.

proxy-add-original-uri-header

Adds an X-Original-Uri header with the original request URI to the backend request

generate-request-id

Ensures that X-Request-ID is defaulted to a random value, if no X-Request-ID is present in the request

enable-opentracing

Enables the nginx Opentracing extension. default: is disabled

References: https://github.com/opentracing-contrib/nginx-opentracing

opentracing-operation-name

Specifies a custom name for the server span. default: is empty

For example, set to "HTTP $request_method $uri".

opentracing-location-operation-name

Specifies a custom name for the location span. default: is empty

For example, set to "HTTP $request_method $uri".

zipkin-collector-host

Specifies the host to use when uploading traces. It must be a valid URL.

zipkin-collector-port

Specifies the port to use when uploading traces. default: 9411

zipkin-service-name

Specifies the service name to use for any traces created. default: nginx

zipkin-sample-rate

Specifies sample rate for any traces created. default: 1.0

jaeger-collector-host

Specifies the host to use when uploading traces. It must be a valid URL.

jaeger-collector-port

Specifies the port to use when uploading traces. default: 6831

jaeger-endpoint

Specifies the endpoint to use when uploading traces to a collector. This takes priority over jaeger-collector-host if both are specified.

jaeger-service-name

Specifies the service name to use for any traces created. default: nginx

jaeger-propagation-format

Specifies the traceparent/tracestate propagation format. default: jaeger

jaeger-sampler-type

Specifies the sampler to be used when sampling traces. The available samplers are: const, probabilistic, ratelimiting, remote. default: const

jaeger-sampler-param

Specifies the argument to be passed to the sampler constructor. Must be a number. For const this should be 0 to never sample and 1 to always sample. default: 1

jaeger-sampler-host

Specifies the custom remote sampler host to be passed to the sampler constructor. Must be a valid URL. Leave blank to use default value (localhost). default: http://127.0.0.1

jaeger-sampler-port

Specifies the custom remote sampler port to be passed to the sampler constructor. Must be a number. default: 5778

jaeger-trace-context-header-name

Specifies the header name used for passing trace context. default: uber-trace-id

jaeger-debug-header

Specifies the header name used for force sampling. default: jaeger-debug-id

jaeger-baggage-header

Specifies the header name used to submit baggage if there is no root span. default: jaeger-baggage

jaeger-tracer-baggage-header-prefix

Specifies the header prefix used to propagate baggage. default: uberctx-

datadog-collector-host

Specifies the datadog agent host to use when uploading traces. It must be a valid URL.

datadog-collector-port

Specifies the port to use when uploading traces. default: 8126

datadog-service-name

Specifies the service name to use for any traces created. default: nginx

datadog-environment

Specifies the environment this trace belongs to. default: prod

datadog-operation-name-override

Overrides the operation naem to use for any traces crated. default: nginx.handle

datadog-priority-sampling

Specifies to use client-side sampling. If true disables client-side sampling (thus ignoring sample_rate) and enables distributed priority sampling, where traces are sampled based on a combination of user-assigned priorities and configuration from the agent. default: true

datadog-sample-rate

Specifies sample rate for any traces created. This is effective only when datadog-priority-sampling is false default: 1.0

main-snippet

Adds custom configuration to the main section of the nginx configuration.

http-snippet

Adds custom configuration to the http section of the nginx configuration.

server-snippet

Adds custom configuration to all the servers in the nginx configuration.

location-snippet

Adds custom configuration to all the locations in the nginx configuration.

You can not use this to add new locations that proxy to the Kubernetes pods, as the snippet does not have access to the Go template functions. If you want to add custom locations you will have to provide your own nginx.tmpl.

custom-http-errors

Enables which HTTP codes should be passed for processing with the error_page directive

Setting at least one code also enables proxy_intercept_errors which are required to process error_page.

Example usage: custom-http-errors: 404,415

proxy-body-size

Sets the maximum allowed size of the client request body. See NGINX client_max_body_size.

proxy-connect-timeout

Sets the timeout for establishing a connection with a proxied server. It should be noted that this timeout cannot usually exceed 75 seconds.

proxy-read-timeout

Sets the timeout in seconds for reading a response from the proxied server. The timeout is set only between two successive read operations, not for the transmission of the whole response.

proxy-send-timeout

Sets the timeout in seconds for transmitting a request to the proxied server. The timeout is set only between two successive write operations, not for the transmission of the whole request.

proxy-buffers-number

Sets the number of the buffer used for reading the first part of the response received from the proxied server. This part usually contains a small response header.

proxy-buffer-size

Sets the size of the buffer used for reading the first part of the response received from the proxied server. This part usually contains a small response header.

proxy-cookie-path

Sets a text that should be changed in the path attribute of the “Set-Cookie” header fields of a proxied server response.

proxy-cookie-domain

Sets a text that should be changed in the domain attribute of the “Set-Cookie” header fields of a proxied server response.

proxy-next-upstream

Specifies in which cases a request should be passed to the next server.

proxy-next-upstream-timeout

Limits the time in seconds during which a request can be passed to the next server.

proxy-next-upstream-tries

Limit the number of possible tries a request should be passed to the next server.

proxy-redirect-from

Sets the original text that should be changed in the "Location" and "Refresh" header fields of a proxied server response. default: off

References: http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_redirect

proxy-request-buffering

Enables or disables buffering of a client request body.

ssl-redirect

Sets the global value of redirects (301) to HTTPS if the server has a TLS certificate (defined in an Ingress rule). default: "true"

whitelist-source-range

Sets the default whitelisted IPs for each server block. This can be overwritten by an annotation on an Ingress rule. See ngx_http_access_module.

skip-access-log-urls

Sets a list of URLs that should not appear in the NGINX access log. This is useful with urls like /health or health-check that make "complex" reading the logs. default: is empty

limit-rate

Limits the rate of response transmission to a client. The rate is specified in bytes per second. The zero value disables rate limiting. The limit is set per a request, and so if a client simultaneously opens two connections, the overall rate will be twice as much as the specified limit.

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#limit_rate

limit-rate-after

Sets the initial amount after which the further transmission of a response to a client will be rate limited.

lua-shared-dicts

Customize default Lua shared dictionaries or define more. You can use the following syntax to do so:

lua-shared-dicts: "<my dict name>: <my dict size>, [<my dict name>: <my dict size>], ..."

For example following will set default certificate_data dictionary to 100M and will introduce a new dictionary called my_custom_plugin:

lua-shared-dicts: "certificate_data: 100, my_custom_plugin: 5"

You can optionally set a size unit to allow for kilobyte-granularity. Allowed units are 'm' or 'k' (case-insensitive), and it defaults to MB if no unit is provided. Here is a similar example, but the my_custom_plugin dict is only 512KB.

lua-shared-dicts: "certificate_data: 100, my_custom_plugin: 512k"

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#limit_rate_after

http-redirect-code

Sets the HTTP status code to be used in redirects. Supported codes are 301,302,307 and 308 default: 308

Why the default code is 308?

RFC 7238 was created to define the 308 (Permanent Redirect) status code that is similar to 301 (Moved Permanently) but it keeps the payload in the redirect. This is important if we send a redirect in methods like POST.

proxy-buffering

Enables or disables buffering of responses from the proxied server.

limit-req-status-code

Sets the status code to return in response to rejected requests. default: 503

limit-conn-status-code

Sets the status code to return in response to rejected connections. default: 503

no-tls-redirect-locations

A comma-separated list of locations on which http requests will never get redirected to their https counterpart. default: "/.well-known/acme-challenge"

global-auth-url

A url to an existing service that provides authentication for all the locations. Similar to the Ingress rule annotation nginx.ingress.kubernetes.io/auth-url. Locations that should not get authenticated can be listed using no-auth-locations See no-auth-locations. In addition, each service can be excluded from authentication via annotation enable-global-auth set to "false". default: ""

References: https://github.com/kubernetes/ingress-nginx/blob/main/docs/user-guide/nginx-configuration/annotations.md#external-authentication

global-auth-method

A HTTP method to use for an existing service that provides authentication for all the locations. Similar to the Ingress rule annotation nginx.ingress.kubernetes.io/auth-method. default: ""

global-auth-signin

Sets the location of the error page for an existing service that provides authentication for all the locations. Similar to the Ingress rule annotation nginx.ingress.kubernetes.io/auth-signin. default: ""

global-auth-signin-redirect-param

Sets the query parameter in the error page signin URL which contains the original URL of the request that failed authentication. Similar to the Ingress rule annotation nginx.ingress.kubernetes.io/auth-signin-redirect-param. default: "rd"

global-auth-response-headers

Sets the headers to pass to backend once authentication request completes. Applied to all the locations. Similar to the Ingress rule annotation nginx.ingress.kubernetes.io/auth-response-headers. default: ""

global-auth-request-redirect

Sets the X-Auth-Request-Redirect header value. Applied to all the locations. Similar to the Ingress rule annotation nginx.ingress.kubernetes.io/auth-request-redirect. default: ""

global-auth-snippet

Sets a custom snippet to use with external authentication. Applied to all the locations. Similar to the Ingress rule annotation nginx.ingress.kubernetes.io/auth-request-redirect. default: ""

global-auth-cache-key

Enables caching for global auth requests. Specify a lookup key for auth responses, e.g. $remote_user$http_authorization.

global-auth-cache-duration

Set a caching time for auth responses based on their response codes, e.g. 200 202 30m. See proxy_cache_valid for details. You may specify multiple, comma-separated values: 200 202 10m, 401 5m. defaults to 200 202 401 5m.

no-auth-locations

A comma-separated list of locations that should not get authenticated. default: "/.well-known/acme-challenge"

block-cidrs

A comma-separated list of IP addresses (or subnets), request from which have to be blocked globally.

References: http://nginx.org/en/docs/http/ngx_http_access_module.html#deny

block-user-agents

A comma-separated list of User-Agent, request from which have to be blocked globally. It's possible to use here full strings and regular expressions. More details about valid patterns can be found at map Nginx directive documentation.

References: http://nginx.org/en/docs/http/ngx_http_map_module.html#map

block-referers

A comma-separated list of Referers, request from which have to be blocked globally. It's possible to use here full strings and regular expressions. More details about valid patterns can be found at map Nginx directive documentation.

References: http://nginx.org/en/docs/http/ngx_http_map_module.html#map

proxy-ssl-location-only

Set if proxy-ssl parameters should be applied only on locations and not on servers. default: is disabled

default-type

Sets the default MIME type of a response. default: text/html

References: http://nginx.org/en/docs/http/ngx_http_core_module.html#default_type

global-rate-limit

• global-rate-limit-status-code: configure HTTP status code to return when rejecting requests. Defaults to 429.

Configure memcached client for Global Rate Limiting.

• global-rate-limit-memcached-host: IP/FQDN of memcached server to use. Required to enable Global Rate Limiting.
• global-rate-limit-memcached-port: port of memcached server to use. Defaults default memcached port of 11211.
• global-rate-limit-memcached-connect-timeout: configure timeout for connect, send and receive operations. Unit is millisecond. Defaults to 50ms.
• global-rate-limit-memcached-max-idle-timeout: configure timeout for cleaning idle connections. Unit is millisecond. Defaults to 50ms.
• global-rate-limit-memcached-pool-size: configure number of max connections to keep alive. Make sure your memcached server can handle global-rate-limit-memcached-pool-size * worker-processes * <number of ingress-nginx replicas> simultaneous connections.

These settings get used by lua-resty-global-throttle that ingress-nginx includes. Refer to the link to learn more about lua-resty-global-throttle.