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<!doctype html> < html lang = en class = no-js > < head > < meta charset = utf-8 > < meta name = viewport content = "width=device-width,initial-scale=1" > < link href = https://kubernetes.github.io/ingress-nginx/user-guide/exposing-tcp-udp-services/ rel = canonical > < link href = ../default-backend/ rel = prev > < link href = ../fcgi-services/ rel = next > < link rel = icon href = ../../assets/images/favicon.png > < meta name = generator content = "mkdocs-1.5.3, mkdocs-material-9.4.5" > < title > Exposing TCP and UDP services - Ingress-Nginx Controller< / title > < link rel = stylesheet href = ../../assets/stylesheets/main.6a10b989.min.css > < link rel = stylesheet href = ../../assets/stylesheets/palette.356b1318.min.css > < link rel = preconnect href = https://fonts.gstatic.com crossorigin > < link rel = stylesheet href = "https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback" > < style > : root { --md-text-font : "Roboto" ; --md-code-font : "Roboto Mono" } < / style > < link rel = stylesheet href = ../../extra.css > < script > _ _md _scope = new URL ( "../.." , location ) , _ _md _hash = e => [ ... e ] . reduce ( ( e , _ ) => ( e << 5 ) - e + _ . charCodeAt ( 0 ) , 0 ) , _ _md _get = ( e , _ = localStorage , t = _ _md _scope ) => JSON . parse ( _ . getItem ( t . pathname + "." + e ) ) , _ _md _set = ( e , _ , t = localStorage , a = _ _md _scope ) => { try { t . setItem ( a . pathname + "." + e , JSON . stringify ( _ ) ) } catch ( e ) { } } < / script > < / head > < body dir = ltr data-md-color-scheme = default data-md-color-primary = teal data-md-color-accent = green > < input class = md-toggle data-md-toggle = drawer type = checkbox id = __drawer autocomplete = off > < input class = md-toggle data-md-toggle = search type = checkbox id = __search autocomplete = off > < label class = md-overlay for = __drawer > < / label > < div data-md-component = skip > < a href = #exposing-tcp-and-udp-services class = md-skip > Skip to content < / a > < / div > < div data-md-component = announce > < / div > < header class = "md-header md-header--shadow md-header--lifted" data-md-component = header > < nav class = "md-header__inner md-grid" aria-label = Header > < a href = ../.. title = "Ingress-Nginx Controller" class = "md-header__button md-logo" aria-label = "Ingress-Nginx Controller" data-md-component = logo > < svg xmlns = http://www.w3.org/2000/svg viewbox = "0 0 24 24" > < path d = "M12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54Z" / > < / svg > < / a > < label class = "md-header__button md-icon" for = __drawer > < svg xmlns = http://www.w3.org/2000/svg viewbox = "0 0 24 24" > < path d = "M3 6h18v2H3V6m0 5h18v2H3v-2m0 5h18v2H3v-2Z" / > < / svg > < / label > < div class = md-header__title data-md-component = header-title > < div class = md-header__ellipsis > < div class = md-header__topic > < span class = md-ellipsis > Ingress-Nginx Controller < / span > < / div > < div class = md-header__topic data-md-component = header-topic > < span class = md-ellipsis > Exposing TCP and UDP services < / span > < / div > < / div > < / div > < label class = "md-header__button md-icon" for = __search > < svg xmlns = http://www.w3.org/2000/svg viewbox = "0 0 24 24" > < path d = "M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z" / > < / svg > < / label > < div class = md-search data-md-component = search role = dialog > < label class = md-search__overlay for = __search > < / label > < div class = md-search__inner role = search > < form class = md-search__form name = search > < input type = text class = md-search__input name = query aria-label = Search placeholder = Search autocapitalize = off autocorrect = off autocomplete = off spellcheck = false data-md-component = search-query required > < label class = "md-search__icon md-icon" for = __search > < svg xmlns = http://www.w3.org/2000/svg viewbox = "0 0 24 24" > < path d = "M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z" / > < / svg > < svg xmlns = http://www.w3.org/2000/svg viewbox = "0 0 24 24" > < path d = "M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z" / > < / svg > < / label > < nav class = md-search__options a
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< span class = nt > kind< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ConfigMap< / span >
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< span class = nt > metadata< / span > < span class = p > :< / span >
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< span class = w > < / span > < span class = nt > name< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > tcp-services< / span >
< span class = w > < / span > < span class = nt > namespace< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ingress-nginx< / span >
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< span class = nt > data< / span > < span class = p > :< / span >
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< span class = w > < / span > < span class = nt > 9000< / span > < span class = p > :< / span > < span class = w > < / span > < span class = s > " default/example-go:8080" < / span >
< / code > < / pre > < / div > < p > Since 1.9.13 NGINX provides < a href = https://www.nginx.com/blog/announcing-udp-load-balancing/ > UDP Load Balancing< / a > . The next example shows how to expose the service < code > kube-dns< / code > running in the namespace < code > kube-system< / code > in the port < code > 53< / code > using the port < code > 53< / code > < / p > < div class = highlight > < pre > < span > < / span > < code > < span class = nt > apiVersion< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > v1< / span >
< span class = nt > kind< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ConfigMap< / span >
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< span class = nt > metadata< / span > < span class = p > :< / span >
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< span class = w > < / span > < span class = nt > name< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > udp-services< / span >
< span class = w > < / span > < span class = nt > namespace< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ingress-nginx< / span >
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< span class = nt > data< / span > < span class = p > :< / span >
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< span class = w > < / span > < span class = nt > 53< / span > < span class = p > :< / span > < span class = w > < / span > < span class = s > " kube-system/kube-dns:53" < / span >
< / code > < / pre > < / div > < p > If TCP/UDP proxy support is used, then those ports need to be exposed in the Service defined for the Ingress.< / p > < p > < div class = highlight > < pre > < span > < / span > < code > < span class = nt > apiVersion< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > v1< / span >
< span class = nt > kind< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > Service< / span >
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< span class = nt > metadata< / span > < span class = p > :< / span >
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< span class = w > < / span > < span class = nt > name< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ingress-nginx< / span >
< span class = w > < / span > < span class = nt > namespace< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ingress-nginx< / span >
< span class = w > < / span > < span class = nt > labels< / span > < span class = p > :< / span >
< span class = w > < / span > < span class = nt > app.kubernetes.io/name< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ingress-nginx< / span >
< span class = w > < / span > < span class = nt > app.kubernetes.io/part-of< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ingress-nginx< / span >
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< span class = nt > spec< / span > < span class = p > :< / span >
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< span class = w > < / span > < span class = nt > type< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LoadBalancer< / span >
< span class = w > < / span > < span class = nt > ports< / span > < span class = p > :< / span >
< span class = w > < / span > < span class = "p p-Indicator" > -< / span > < span class = w > < / span > < span class = nt > name< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > http< / span >
< span class = w > < / span > < span class = nt > port< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > 80< / span >
< span class = w > < / span > < span class = nt > targetPort< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > 80< / span >
< span class = w > < / span > < span class = nt > protocol< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > TCP< / span >
< span class = w > < / span > < span class = "p p-Indicator" > -< / span > < span class = w > < / span > < span class = nt > name< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > https< / span >
< span class = w > < / span > < span class = nt > port< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > 443< / span >
< span class = w > < / span > < span class = nt > targetPort< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > 443< / span >
< span class = w > < / span > < span class = nt > protocol< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > TCP< / span >
< span class = w > < / span > < span class = "p p-Indicator" > -< / span > < span class = w > < / span > < span class = nt > name< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > proxied-tcp-9000< / span >
< span class = w > < / span > < span class = nt > port< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > 9000< / span >
< span class = w > < / span > < span class = nt > targetPort< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > 9000< / span >
< span class = w > < / span > < span class = nt > protocol< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > TCP< / span >
< span class = w > < / span > < span class = nt > selector< / span > < span class = p > :< / span >
< span class = w > < / span > < span class = nt > app.kubernetes.io/name< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ingress-nginx< / span >
< span class = w > < / span > < span class = nt > app.kubernetes.io/part-of< / span > < span class = p > :< / span > < span class = w > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ingress-nginx< / span >
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< / code > < / pre > < / div > Then, the configmap should be added into ingress controller's deployment args. < div class = highlight > < pre > < span > < / span > < code > args:
- /nginx-ingress-controller
- --tcp-services-configmap=ingress-nginx/tcp-services
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