如何使用consul模板在nginx-config上设置自动注册的服务

Question

我在docker上使用consul、consul模板和nginx。在添加每个新服务时，我必须再次更改执政官模板源文件。顺便说一下，我们都在使用soap服务和代理。它们都有服务uri。如何编写nginx.ctmpl？示例web服务终点：

1.1.1.1:123/Service1.asmx

在执政官配置中，添加如下：

"services": [
{
"id": "Svc0",
"name": "Service",
"port": 3307,
"address": "1.1.1.1",
"checks": [
{
"http": "http://1.1.1.1:123/service1.asmx",
"method": "GET",
"interval": "10s",
"timeout": "1s"
}]
}
]

在nginx.ctmpl中，我想将这个部分更改为动态，但由于服务器部分的原因，我找不到任何解决方案。

upstream backend {
{{ range service "Service" }}
server {{ .Address }}:{{ .Port }};{{ end }}
}
server {
listen                443 ssl;
server_name           domainname.com.tr;
proxy_set_header      X-Forwarded-Port 443;
ssl_certificate       /etc/nginx/tls/..crt;
ssl_certificate_key   /etc/nginx/tls/..key;

location / {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_pass https://domainanother;
}

location  ^~ /Service1.asmx {

proxy_pass http://backend;
proxy_redirect off;
}
access_log /etc/nginx/log/gw/https/access.log;
error_log /etc/nginx/log/gw/https/error.log;
}

Answer 1

这应该是您想要的。

给定以下服务配置：

# services.hcl
services {
id = "svc1"
name = "service1"
address = "1.1.1.1"
port = 8080
}
services {
id = "svc2"
name = "service2"
address = "1.1.1.1"
port = 8081
check = {
http = "http://1.1.1.1/Service1.asmx"
method = "GET"
interval = "10s"
timeout = "1s"
}
}

和以下模板：

{{- /*
Upstream template
This template is used to the upstream configuration for the service.
It takes an array of service health objects as input and returns the template
as a string.
*/ -}}
{{- define "upstream-template" -}}
### Upstream configuration for {{ . }}
upstream {{ . }} {
zone upstream_{{ . }} 128k;
{{ range service . "any" }}
# Instance: {{ printf "%s-%s" .ID .Name }}
{{- /* Mark the backend as down if the health status is critical */ -}}
{{- $is_down := sprig_ternary " down" "" (eq .Status "critical") }}
server {{ printf "%s:%d%s" .Address .Port $is_down -}};
{{ end }}
}
{{ end -}}
{{- /* Obtain list of services from the catalog */ -}}
{{- $servicesList := services -}}
{{- /* Generate upstream configurations for each logical service */ -}}
{{- range $servicesList -}}
{{- if and (ne .Name "consul") (.Name | contains "sidecar" | not) -}}
{{- executeTemplate "upstream-template" .Name -}}
{{- end -}}
{{- end -}}
server {
listen                443 ssl;
server_name           domainname.com.tr;
proxy_set_header      X-Forwarded-Port 443;
ssl_certificate       /etc/nginx/tls/..crt;
ssl_certificate_key   /etc/nginx/tls/..key;
access_log /etc/nginx/log/gw/https/access.log;
error_log /etc/nginx/log/gw/https/error.log;
location / {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_pass https://domainanother;
}
{{- /*
Generate the location blocks for each logical service.
Ignore the 'consul' service itself, and any sidecar services.
*/ -}}
{{ range $servicesList -}}
{{- if and (ne .Name "consul") (.Name | contains "sidecar" | not) }}
location ^~ /{{ .Name | sprig_title }}.asmx {
proxy_pass http://{{ .Name }};
proxy_redirect off;
}
{{ end -}}
{{- end }}
}

Consul模板将生成以下nginx配置。

### Upstream configuration for service1
upstream service1 {
zone upstream_service1 128k;

# Instance: svc1-service1
server 1.1.1.1:8080;

}
### Upstream configuration for service2
upstream service2 {
zone upstream_service2 128k;

# Instance: svc2-service2
server 1.1.1.1:8081;

}
server {
listen                443 ssl;
server_name           domainname.com.tr;
proxy_set_header      X-Forwarded-Port 443;
ssl_certificate       /etc/nginx/tls/..crt;
ssl_certificate_key   /etc/nginx/tls/..key;
access_log /etc/nginx/log/gw/https/access.log;
error_log /etc/nginx/log/gw/https/error.log;
location / {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_pass https://domainanother;
}
location ^~ /Service1.asmx {
proxy_pass http://service1;
proxy_redirect off;
}

location ^~ /Service2.asmx {
proxy_pass http://service2;
proxy_redirect off;
}

}