我有一个需要公开的用例
/swagger-ui.html没有身份验证和
/带有身份验证的API/*
我在舵图中创建了2个入口文件
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/auth-method: POST
nginx.ingress.kubernetes.io/auth-url: {{ .Values.service.authServerUrl }}/authorization
nginx.ingress.kubernetes.io/cors-allow-methods: "PUT, PATCH, GET, POST, DELETE, OPTIONS"
nginx.ingress.kubernetes.io/cors-allow-origin: "*"
nginx.ingress.kubernetes.io/cors-allow-headers: '*'
nginx.ingress.kubernetes.io/ssl-redirect: "false"
labels:
app: {{ .Chart.Name }}
appVersion: {{ .Chart.AppVersion | quote }}
chartVersion: {{ .Chart.Version | quote }}
name: {{ .Chart.Name }}
spec:
rules:
- host: "example.com"
http:
paths:
- backend:
serviceName: service
servicePort: 8080
path: /apis
和另一个没有身份验证的入口文件
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/ssl-redirect: "false"
labels:
app: {{ .Chart.Name }}
appVersion: {{ .Chart.AppVersion | quote }}
chartVersion: {{ .Chart.Version | quote }}
name: {{ .Chart.Name }}
spec:
rules:
- host: "example.com"
http:
paths:
- backend:
serviceName: service
servicePort: 8080
path: /swagger-ui.html
但第二次进入似乎不起作用。
=============================================
萨加尔·维兰卡的答案是正确的。只需要更改不同的服务名称
下面是我的最终入口文件
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/auth-method: POST
nginx.ingress.kubernetes.io/auth-url: {{ .Values.service.authServerUrl }}/authorization
nginx.ingress.kubernetes.io/cors-allow-methods: "PUT, PATCH, GET, POST, DELETE, OPTIONS"
nginx.ingress.kubernetes.io/cors-allow-origin: "*"
nginx.ingress.kubernetes.io/cors-allow-headers: '*'
nginx.ingress.kubernetes.io/ssl-redirect: "false"
labels:
app: {{ .Chart.Name }}
appVersion: {{ .Chart.AppVersion | quote }}
chartVersion: {{ .Chart.Version | quote }}
name: {{ .Chart.Name }}-api
spec:
rules:
- host: "example.com"
http:
paths:
- backend:
serviceName: service
servicePort: 8080
path: /apis
和另一个带有swagger 的入口文件
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/ssl-redirect: "false"
labels:
app: {{ .Chart.Name }}
appVersion: {{ .Chart.AppVersion | quote }}
chartVersion: {{ .Chart.Version | quote }}
name: {{ .Chart.Name }}-swagger
spec:
rules:
- host: "example.com"
http:
paths:
- backend:
serviceName: service
servicePort: 8080
path: /swagger-ui.html
- backend:
serviceName: {{ .Chart.Name }}
servicePort: 8080
path: /webjars
- backend:
serviceName: {{ .Chart.Name }}
servicePort: 8080
path: /swagger-resources
- backend:
serviceName: {{ .Chart.Name }}
servicePort: 8080
path: /v2/api-docs
请尝试将两个模板的Ingress名称更改为唯一的。目前我看到两者都设置为低于
name: {{ .Chart.Name }}
我刚刚将apiVersion从extensions/v1beta1更改为networking.k8s.io/v1beta1，并将下面的yaml文件添加到我的kubernetes集群中
---
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/auth-method: POST
nginx.ingress.kubernetes.io/auth-url: "http://www.gool.com/authorization"
nginx.ingress.kubernetes.io/cors-allow-methods: "PUT, PATCH, GET, POST, DELETE, OPTIONS"
nginx.ingress.kubernetes.io/cors-allow-origin: "*"
nginx.ingress.kubernetes.io/cors-allow-headers: '*'
nginx.ingress.kubernetes.io/ssl-redirect: "false"
labels:
app: nginx
appVersion: "1"
chartVersion: "1"
name: nginx1
spec:
rules:
- host: "example.com"
http:
paths:
- backend:
serviceName: service
servicePort: 8080
path: /apis
---
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
annotations:
nginx.ingress.kubernetes.io/ssl-redirect: "false"
labels:
app: nginx
appVersion: "1"
chartVersion: "1"
name: nginx2
spec:
rules:
- host: "example.com"
http:
paths:
- backend:
serviceName: service
servicePort: 8080
path: /swagger-ui.html
它在Nginx Controller/etc/Nginx/Nginx.conf中创建了下面的服务器，该服务器设置授权的内部位置，并将location/apis auth_request指向它
## start server example.com
server {
server_name example.com ;
listen 80 ;
listen [::]:80 ;
listen 442 proxy_protocol ssl http2 ;
listen [::]:442 proxy_protocol ssl http2 ;
set $proxy_upstream_name "-";
ssl_certificate_by_lua_block {
certificate.call()
}
location /swagger-ui.html/ {
set $namespace "kt";
set $ingress_name "nginx2";
set $service_name "service";
set $service_port "8080";
set $location_path "/swagger-ui.html";
set $global_rate_limit_exceeding n;
rewrite_by_lua_block {
lua_ingress.rewrite({
force_ssl_redirect = false,
ssl_redirect = false,
force_no_ssl_redirect = false,
use_port_in_redirects = false,
global_throttle = { namespace = "", limit = 0, window_size = 0, key = { }, ignored_cidrs = { } },
})
balancer.rewrite()
plugins.run()
}
# be careful with `access_by_lua_block` and `satisfy any` directives as satisfy any
# will always succeed when there's `access_by_lua_block` that does not have any lua code doing `ngx.exit(ngx.DECLINED)`
# other authentication method such as basic auth or external auth useless - all requests will be allowed.
#access_by_lua_block {
#}
header_filter_by_lua_block {
lua_ingress.header()
plugins.run()
}
body_filter_by_lua_block {
plugins.run()
}
log_by_lua_block {
balancer.log()
monitor.call()
plugins.run()
}
port_in_redirect off;
set $balancer_ewma_score -1;
set $proxy_upstream_name "kt-service-8080";
set $proxy_host $proxy_upstream_name;
set $pass_access_scheme $scheme;
set $pass_server_port $server_port;
set $best_http_host $http_host;
set $pass_port $pass_server_port;
set $proxy_alternative_upstream_name "";
client_max_body_size 1m;
proxy_set_header Host $best_http_host;
# Pass the extracted client certificate to the backend
# Allow websocket connections
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_set_header X-Request-ID $req_id;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Host $best_http_host;
proxy_set_header X-Forwarded-Port $pass_port;
proxy_set_header X-Forwarded-Proto $pass_access_scheme;
proxy_set_header X-Scheme $pass_access_scheme;
# Pass the original X-Forwarded-For
proxy_set_header X-Original-Forwarded-For $http_x_forwarded_for;
# mitigate HTTPoxy Vulnerability
# https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx/
proxy_set_header Proxy "";
# Custom headers to proxied server
proxy_connect_timeout 5s;
proxy_send_timeout 60s;
proxy_read_timeout 60s;
proxy_buffering off;
proxy_buffer_size 4k;
proxy_buffers 4 4k;
proxy_max_temp_file_size 1024m;
proxy_request_buffering on;
proxy_http_version 1.1;
proxy_cookie_domain off;
proxy_cookie_path off;
# In case of errors try the next upstream server before returning an error
proxy_next_upstream error timeout;
proxy_next_upstream_timeout 0;
proxy_next_upstream_tries 3;
proxy_pass http://upstream_balancer;
proxy_redirect off;
}
location = /swagger-ui.html {
set $namespace "kt";
set $ingress_name "nginx2";
set $service_name "service";
set $service_port "8080";
set $location_path "/swagger-ui.html";
set $global_rate_limit_exceeding n;
rewrite_by_lua_block {
lua_ingress.rewrite({
force_ssl_redirect = false,
ssl_redirect = false,
force_no_ssl_redirect = false,
use_port_in_redirects = false,
global_throttle = { namespace = "", limit = 0, window_size = 0, key = { }, ignored_cidrs = { } },
})
balancer.rewrite()
plugins.run()
}
# be careful with `access_by_lua_block` and `satisfy any` directives as satisfy any
# will always succeed when there's `access_by_lua_block` that does not have any lua code doing `ngx.exit(ngx.DECLINED)`
# other authentication method such as basic auth or external auth useless - all requests will be allowed.
#access_by_lua_block {
#}
header_filter_by_lua_block {
lua_ingress.header()
plugins.run()
}
body_filter_by_lua_block {
plugins.run()
}
log_by_lua_block {
balancer.log()
monitor.call()
plugins.run()
}
port_in_redirect off;
set $balancer_ewma_score -1;
set $proxy_upstream_name "kt-service-8080";
set $proxy_host $proxy_upstream_name;
set $pass_access_scheme $scheme;
set $pass_server_port $server_port;
set $best_http_host $http_host;
set $pass_port $pass_server_port;
set $proxy_alternative_upstream_name "";
client_max_body_size 1m;
proxy_set_header Host $best_http_host;
# Pass the extracted client certificate to the backend
# Allow websocket connections
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_set_header X-Request-ID $req_id;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Host $best_http_host;
proxy_set_header X-Forwarded-Port $pass_port;
proxy_set_header X-Forwarded-Proto $pass_access_scheme;
proxy_set_header X-Scheme $pass_access_scheme;
# Pass the original X-Forwarded-For
proxy_set_header X-Original-Forwarded-For $http_x_forwarded_for;
# mitigate HTTPoxy Vulnerability
# https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx/
proxy_set_header Proxy "";
# Custom headers to proxied server
proxy_connect_timeout 5s;
proxy_send_timeout 60s;
proxy_read_timeout 60s;
proxy_buffering off;
proxy_buffer_size 4k;
proxy_buffers 4 4k;
proxy_max_temp_file_size 1024m;
proxy_request_buffering on;
proxy_http_version 1.1;
proxy_cookie_domain off;
proxy_cookie_path off;
# In case of errors try the next upstream server before returning an error
proxy_next_upstream error timeout;
proxy_next_upstream_timeout 0;
proxy_next_upstream_tries 3;
proxy_pass http://upstream_balancer;
proxy_redirect off;
}
location = /_external-auth-L2FwaXMv-Prefix {
internal;
# ngx_auth_request module overrides variables in the parent request,
# therefore we have to explicitly set this variable again so that when the parent request
# resumes it has the correct value set for this variable so that Lua can pick backend correctly
set $proxy_upstream_name "kt-service-8080";
proxy_pass_request_body off;
proxy_set_header Content-Length "";
proxy_set_header X-Forwarded-Proto "";
proxy_set_header X-Request-ID $req_id;
proxy_method POST;
proxy_set_header X-Original-URI $request_uri;
proxy_set_header X-Scheme $pass_access_scheme;
proxy_set_header Host www.gool.com;
proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
proxy_set_header X-Original-Method $request_method;
proxy_set_header X-Sent-From "nginx-ingress-controller";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Auth-Request-Redirect $request_uri;
proxy_buffering off;
proxy_buffer_size 4k;
proxy_buffers 4 4k;
proxy_request_buffering on;
proxy_http_version 1.1;
proxy_ssl_server_name on;
proxy_pass_request_headers on;
client_max_body_size 1m;
# Pass the extracted client certificate to the auth provider
set $target http://www.gool.com/authorization;
proxy_pass $target;
}
location /apis/ {
set $namespace "kt";
set $ingress_name "nginx1";
set $service_name "service";
set $service_port "8080";
set $location_path "/apis";
set $global_rate_limit_exceeding n;
rewrite_by_lua_block {
lua_ingress.rewrite({
force_ssl_redirect = false,
ssl_redirect = false,
force_no_ssl_redirect = false,
use_port_in_redirects = false,
global_throttle = { namespace = "", limit = 0, window_size = 0, key = { }, ignored_cidrs = { } },
})
balancer.rewrite()
plugins.run()
}
# be careful with `access_by_lua_block` and `satisfy any` directives as satisfy any
# will always succeed when there's `access_by_lua_block` that does not have any lua code doing `ngx.exit(ngx.DECLINED)`
# other authentication method such as basic auth or external auth useless - all requests will be allowed.
#access_by_lua_block {
#}
header_filter_by_lua_block {
lua_ingress.header()
plugins.run()
}
body_filter_by_lua_block {
plugins.run()
}
log_by_lua_block {
balancer.log()
monitor.call()
plugins.run()
}
port_in_redirect off;
set $balancer_ewma_score -1;
set $proxy_upstream_name "kt-service-8080";
set $proxy_host $proxy_upstream_name;
set $pass_access_scheme $scheme;
set $pass_server_port $server_port;
set $best_http_host $http_host;
set $pass_port $pass_server_port;
set $proxy_alternative_upstream_name "";
# this location requires authentication
auth_request /_external-auth-L2FwaXMv-Prefix;
auth_request_set $auth_cookie $upstream_http_set_cookie;
add_header Set-Cookie $auth_cookie;
client_max_body_size 1m;
proxy_set_header Host $best_http_host;
# Pass the extracted client certificate to the backend
# Allow websocket connections
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_set_header X-Request-ID $req_id;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Host $best_http_host;
proxy_set_header X-Forwarded-Port $pass_port;
proxy_set_header X-Forwarded-Proto $pass_access_scheme;
proxy_set_header X-Scheme $pass_access_scheme;
# Pass the original X-Forwarded-For
proxy_set_header X-Original-Forwarded-For $http_x_forwarded_for;
# mitigate HTTPoxy Vulnerability
# https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx/
proxy_set_header Proxy "";
# Custom headers to proxied server
proxy_connect_timeout 5s;
proxy_send_timeout 60s;
proxy_read_timeout 60s;
proxy_buffering off;
proxy_buffer_size 4k;
proxy_buffers 4 4k;
proxy_max_temp_file_size 1024m;
proxy_request_buffering on;
proxy_http_version 1.1;
proxy_cookie_domain off;
proxy_cookie_path off;
# In case of errors try the next upstream server before returning an error
proxy_next_upstream error timeout;
proxy_next_upstream_timeout 0;
proxy_next_upstream_tries 3;
proxy_pass http://upstream_balancer;
proxy_redirect off;
}
location = /_external-auth-L2FwaXM-Exact {
internal;
# ngx_auth_request module overrides variables in the parent request,
# therefore we have to explicitly set this variable again so that when the parent request
# resumes it has the correct value set for this variable so that Lua can pick backend correctly
set $proxy_upstream_name "kt-service-8080";
proxy_pass_request_body off;
proxy_set_header Content-Length "";
proxy_set_header X-Forwarded-Proto "";
proxy_set_header X-Request-ID $req_id;
proxy_method POST;
proxy_set_header X-Original-URI $request_uri;
proxy_set_header X-Scheme $pass_access_scheme;
proxy_set_header Host www.gool.com;
proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
proxy_set_header X-Original-Method $request_method;
proxy_set_header X-Sent-From "nginx-ingress-controller";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Auth-Request-Redirect $request_uri;
proxy_buffering off;
proxy_buffer_size 4k;
proxy_buffers 4 4k;
proxy_request_buffering on;
proxy_http_version 1.1;
proxy_ssl_server_name on;
proxy_pass_request_headers on;
client_max_body_size 1m;
# Pass the extracted client certificate to the auth provider
set $target http://www.gool.com/authorization;
proxy_pass $target;
}
location = /apis {
set $namespace "kt";
set $ingress_name "nginx1";
set $service_name "service";
set $service_port "8080";
set $location_path "/apis";
set $global_rate_limit_exceeding n;
rewrite_by_lua_block {
lua_ingress.rewrite({
force_ssl_redirect = false,
ssl_redirect = false,
force_no_ssl_redirect = false,
use_port_in_redirects = false,
global_throttle = { namespace = "", limit = 0, window_size = 0, key = { }, ignored_cidrs = { } },
})
balancer.rewrite()
plugins.run()
}
# be careful with `access_by_lua_block` and `satisfy any` directives as satisfy any
# will always succeed when there's `access_by_lua_block` that does not have any lua code doing `ngx.exit(ngx.DECLINED)`
# other authentication method such as basic auth or external auth useless - all requests will be allowed.
#access_by_lua_block {
#}
header_filter_by_lua_block {
lua_ingress.header()
plugins.run()
}
body_filter_by_lua_block {
plugins.run()
}
log_by_lua_block {
balancer.log()
monitor.call()
plugins.run()
}
port_in_redirect off;
set $balancer_ewma_score -1;
set $proxy_upstream_name "kt-service-8080";
set $proxy_host $proxy_upstream_name;
set $pass_access_scheme $scheme;
set $pass_server_port $server_port;
set $best_http_host $http_host;
set $pass_port $pass_server_port;
set $proxy_alternative_upstream_name "";
# this location requires authentication
auth_request /_external-auth-L2FwaXM-Exact;
auth_request_set $auth_cookie $upstream_http_set_cookie;
add_header Set-Cookie $auth_cookie;
client_max_body_size 1m;
proxy_set_header Host $best_http_host;
# Pass the extracted client certificate to the backend
# Allow websocket connections
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_set_header X-Request-ID $req_id;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Host $best_http_host;
proxy_set_header X-Forwarded-Port $pass_port;
proxy_set_header X-Forwarded-Proto $pass_access_scheme;
proxy_set_header X-Scheme $pass_access_scheme;
# Pass the original X-Forwarded-For
proxy_set_header X-Original-Forwarded-For $http_x_forwarded_for;
# mitigate HTTPoxy Vulnerability
# https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx/
proxy_set_header Proxy "";
# Custom headers to proxied server
proxy_connect_timeout 5s;
proxy_send_timeout 60s;
proxy_read_timeout 60s;
proxy_buffering off;
proxy_buffer_size 4k;
proxy_buffers 4 4k;
proxy_max_temp_file_size 1024m;
proxy_request_buffering on;
proxy_http_version 1.1;
proxy_cookie_domain off;
proxy_cookie_path off;
# In case of errors try the next upstream server before returning an error
proxy_next_upstream error timeout;
proxy_next_upstream_timeout 0;
proxy_next_upstream_tries 3;
proxy_pass http://upstream_balancer;
proxy_redirect off;
}
location = /_external-auth-Lw-Prefix {
internal;
# ngx_auth_request module overrides variables in the parent request,
# therefore we have to explicitly set this variable again so that when the parent request
# resumes it has the correct value set for this variable so that Lua can pick backend correctly
set $proxy_upstream_name "upstream-default-backend";
proxy_pass_request_body off;
proxy_set_header Content-Length "";
proxy_set_header X-Forwarded-Proto "";
proxy_set_header X-Request-ID $req_id;
proxy_method POST;
proxy_set_header X-Original-URI $request_uri;
proxy_set_header X-Scheme $pass_access_scheme;
proxy_set_header Host www.gool.com;
proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
proxy_set_header X-Original-Method $request_method;
proxy_set_header X-Sent-From "nginx-ingress-controller";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Auth-Request-Redirect $request_uri;
proxy_buffering off;
proxy_buffer_size 4k;
proxy_buffers 4 4k;
proxy_request_buffering on;
proxy_http_version 1.1;
proxy_ssl_server_name on;
proxy_pass_request_headers on;
client_max_body_size 1m;
# Pass the extracted client certificate to the auth provider
set $target http://www.gool.com/authorization;
proxy_pass $target;
}
location / {
set $namespace "kt";
set $ingress_name "nginx1";
set $service_name "";
set $service_port "";
set $location_path "/";
set $global_rate_limit_exceeding n;
rewrite_by_lua_block {
lua_ingress.rewrite({
force_ssl_redirect = false,
ssl_redirect = false,
force_no_ssl_redirect = false,
use_port_in_redirects = false,
global_throttle = { namespace = "", limit = 0, window_size = 0, key = { }, ignored_cidrs = { } },
})
balancer.rewrite()
plugins.run()
}
# be careful with `access_by_lua_block` and `satisfy any` directives as satisfy any
# will always succeed when there's `access_by_lua_block` that does not have any lua code doing `ngx.exit(ngx.DECLINED)`
# other authentication method such as basic auth or external auth useless - all requests will be allowed.
#access_by_lua_block {
#}
header_filter_by_lua_block {
lua_ingress.header()
plugins.run()
}
body_filter_by_lua_block {
plugins.run()
}
log_by_lua_block {
balancer.log()
monitor.call()
plugins.run()
}
port_in_redirect off;
set $balancer_ewma_score -1;
set $proxy_upstream_name "upstream-default-backend";
set $proxy_host $proxy_upstream_name;
set $pass_access_scheme $scheme;
set $pass_server_port $server_port;
set $best_http_host $http_host;
set $pass_port $pass_server_port;
set $proxy_alternative_upstream_name "";
# this location requires authentication
auth_request /_external-auth-Lw-Prefix;
auth_request_set $auth_cookie $upstream_http_set_cookie;
add_header Set-Cookie $auth_cookie;
client_max_body_size 1m;
proxy_set_header Host $best_http_host;
# Pass the extracted client certificate to the backend
# Allow websocket connections
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_set_header X-Request-ID $req_id;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Host $best_http_host;
proxy_set_header X-Forwarded-Port $pass_port;
proxy_set_header X-Forwarded-Proto $pass_access_scheme;
proxy_set_header X-Scheme $pass_access_scheme;
# Pass the original X-Forwarded-For
proxy_set_header X-Original-Forwarded-For $http_x_forwarded_for;
# mitigate HTTPoxy Vulnerability
# https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx/
proxy_set_header Proxy "";
# Custom headers to proxied server
proxy_connect_timeout 5s;
proxy_send_timeout 60s;
proxy_read_timeout 60s;
proxy_buffering off;
proxy_buffer_size 4k;
proxy_buffers 4 4k;
proxy_max_temp_file_size 1024m;
proxy_request_buffering on;
proxy_http_version 1.1;
proxy_cookie_domain off;
proxy_cookie_path off;
# In case of errors try the next upstream server before returning an error
proxy_next_upstream error timeout;
proxy_next_upstream_timeout 0;
proxy_next_upstream_tries 3;
proxy_pass http://upstream_balancer;
proxy_redirect off;
}
}
## end server example.com