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Allow upstreams to have multiple servers for load balancing #3

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merged 1 commit into from Feb 8, 2017
Merged

Allow upstreams to have multiple servers for load balancing #3

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11 changes: 10 additions & 1 deletion main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,15 @@ func runSignal() error {
}

func writeConfig(params []*container) error {
var containers map[string][]*container
containers = make(map[string][]*container);
// Remap the containers as a 2D array with the domain as the index
for _, v := range params {
if _, ok := containers[v.Host]; !ok {
containers[v.Host] = make([]*container, 0)
}
containers[v.Host] = append(containers[v.Host], v)
}
tmpl, err := template.ParseFiles(*templateFile)
if err != nil {
return err
Expand All @@ -115,7 +124,7 @@ func writeConfig(params []*container) error {
return err
}
defer f.Close()
return tmpl.Execute(f, params)
return tmpl.Execute(f, containers)
}

func findClusterName() (*string, error) {
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10 changes: 6 additions & 4 deletions templates/nginx.tmpl
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Original file line number Diff line number Diff line change
Expand Up @@ -9,16 +9,18 @@ server {
return 503;
}

{{ range $index, $value := . }}
upstream {{ $value.Host }} {
{{ range $domain, $container := . }}
upstream {{ $domain }} {
{{ range $_, $value := $container }}
server {{ $value.Address }}:{{ $value.Port }};
{{ end }}
}
server {
server_name {{ $value.Host }};
server_name {{ $domain }};
listen 80;
access_log /var/log/nginx/access.log vhost;
location / {
proxy_pass http://{{ $value.Host }};
proxy_pass http://{{ $domain }};
}
}
{{ end }}