Kubernetes gives an internal source IP although externalTrafficPolicy is set to Local

Our Kubernetes cluster includes an nginx load balancer that forwards the requests to other pods.

However, the nginx sees local source IPs and therefore cannot set the correct X-Real-IP header. I tried setting the externalTrafficPolicy value of nginx to "Local" but the IP does not change.

Section of the nginx service config:

 "selector": {

  "app": "nginx-ingress",

  "component": "controller",

  "release": "loping-lambkin"

},

"clusterIP": "10.106.1.182",

"type": "LoadBalancer",

"sessionAffinity": "None",

"externalTrafficPolicy": "Local",

"healthCheckNodePort": 32718

Result:

GET / HTTP/1.1

Host: example.com:444

X-Request-ID: dd3310a96bf154d2ac38c8877dec312c

X-Real-IP: 10.39.0.0

X-Forwarded-For: 10.39.0.0

We use a bare metal cluster with metallb.

asked Oct 15 '18 at 8:04

Johannes Mittendorfer

556212

I found out that weave needs to be configured using NO_MASQ_LOCAL=1 to respect the externalTrafficPolicy property.
– Johannes Mittendorfer
Oct 15 '18 at 12:54

add a comment |

Our Kubernetes cluster includes an nginx load balancer that forwards the requests to other pods.

However, the nginx sees local source IPs and therefore cannot set the correct X-Real-IP header. I tried setting the externalTrafficPolicy value of nginx to "Local" but the IP does not change.

Section of the nginx service config:

 "selector": {

  "app": "nginx-ingress",

  "component": "controller",

  "release": "loping-lambkin"

},

"clusterIP": "10.106.1.182",

"type": "LoadBalancer",

"sessionAffinity": "None",

"externalTrafficPolicy": "Local",

"healthCheckNodePort": 32718

Result:

GET / HTTP/1.1

Host: example.com:444

X-Request-ID: dd3310a96bf154d2ac38c8877dec312c

X-Real-IP: 10.39.0.0

X-Forwarded-For: 10.39.0.0

We use a bare metal cluster with metallb.

asked Oct 15 '18 at 8:04

Johannes Mittendorfer

556212

I found out that weave needs to be configured using NO_MASQ_LOCAL=1 to respect the externalTrafficPolicy property.
– Johannes Mittendorfer
Oct 15 '18 at 12:54

add a comment |

Our Kubernetes cluster includes an nginx load balancer that forwards the requests to other pods.

However, the nginx sees local source IPs and therefore cannot set the correct X-Real-IP header. I tried setting the externalTrafficPolicy value of nginx to "Local" but the IP does not change.

Section of the nginx service config:

 "selector": {

  "app": "nginx-ingress",

  "component": "controller",

  "release": "loping-lambkin"

},

"clusterIP": "10.106.1.182",

"type": "LoadBalancer",

"sessionAffinity": "None",

"externalTrafficPolicy": "Local",

"healthCheckNodePort": 32718

Result:

GET / HTTP/1.1

Host: example.com:444

X-Request-ID: dd3310a96bf154d2ac38c8877dec312c

X-Real-IP: 10.39.0.0

X-Forwarded-For: 10.39.0.0

We use a bare metal cluster with metallb.

asked Oct 15 '18 at 8:04

Johannes Mittendorfer

556212

Our Kubernetes cluster includes an nginx load balancer that forwards the requests to other pods.

However, the nginx sees local source IPs and therefore cannot set the correct X-Real-IP header. I tried setting the externalTrafficPolicy value of nginx to "Local" but the IP does not change.

Section of the nginx service config:

 "selector": {

  "app": "nginx-ingress",

  "component": "controller",

  "release": "loping-lambkin"

},

"clusterIP": "10.106.1.182",

"type": "LoadBalancer",

"sessionAffinity": "None",

"externalTrafficPolicy": "Local",

"healthCheckNodePort": 32718

Result:

GET / HTTP/1.1

Host: example.com:444

X-Request-ID: dd3310a96bf154d2ac38c8877dec312c

X-Real-IP: 10.39.0.0

X-Forwarded-For: 10.39.0.0

We use a bare metal cluster with metallb.

nginx kubernetes load-balancing kubernetes-ingress nginx-ingress

asked Oct 15 '18 at 8:04

Johannes Mittendorfer

556212

asked Oct 15 '18 at 8:04

Johannes Mittendorfer

556212

asked Oct 15 '18 at 8:04

Johannes Mittendorfer

556212

asked Oct 15 '18 at 8:04

Johannes Mittendorfer

556212

asked Oct 15 '18 at 8:04

Johannes Mittendorfer

556212

I found out that weave needs to be configured using NO_MASQ_LOCAL=1 to respect the externalTrafficPolicy property.
– Johannes Mittendorfer
Oct 15 '18 at 12:54

add a comment |

I found out that weave needs to be configured using NO_MASQ_LOCAL=1 to respect the externalTrafficPolicy property.
– Johannes Mittendorfer
Oct 15 '18 at 12:54

I found out that weave needs to be configured using NO_MASQ_LOCAL=1 to respect the externalTrafficPolicy property.
– Johannes Mittendorfer
Oct 15 '18 at 12:54

add a comment |

1 Answer
1

active

oldest

votes

This appears to be a bug in the IPVS implementation for services of type LoadBalancer : https://github.com/google/metallb/issues/290

answered Nov 19 '18 at 17:09

eknudtson

add a comment |

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1 Answer
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active

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votes

1 Answer
1

active

oldest

votes

This appears to be a bug in the IPVS implementation for services of type LoadBalancer : https://github.com/google/metallb/issues/290

answered Nov 19 '18 at 17:09

eknudtson

add a comment |

This appears to be a bug in the IPVS implementation for services of type LoadBalancer : https://github.com/google/metallb/issues/290

answered Nov 19 '18 at 17:09

eknudtson

add a comment |

This appears to be a bug in the IPVS implementation for services of type LoadBalancer : https://github.com/google/metallb/issues/290

answered Nov 19 '18 at 17:09

eknudtson

This appears to be a bug in the IPVS implementation for services of type LoadBalancer : https://github.com/google/metallb/issues/290

answered Nov 19 '18 at 17:09

eknudtson

answered Nov 19 '18 at 17:09

eknudtson

answered Nov 19 '18 at 17:09

eknudtson

answered Nov 19 '18 at 17:09

eknudtson

add a comment |

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