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feat: PREFER_IPV6_NETWORK environment variable

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This commit is contained in:
Nicolas Duchon 2024-05-15 19:38:18 +02:00
parent a4c694fefc
commit 5aea820aaa
1 changed files with 27 additions and 24 deletions
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51
nginx.tmpl
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@ -23,6 +23,7 @@
{{- $_ := set $config "trust_downstream_proxy" ($globals.Env.TRUST_DOWNSTREAM_PROXY | default "true" | parseBool) }}
{{- $_ := set $config "enable_access_log" ($globals.Env.DISABLE_ACCESS_LOGS | default "false" | parseBool | not) }}
{{- $_ := set $config "enable_ipv6" ($globals.Env.ENABLE_IPV6 | default "false" | parseBool) }}
{{- $_ := set $config "prefer_ipv6_network" ($globals.Env.PREFER_IPV6_NETWORK | default "false" | parseBool) }}
{{- $_ := set $config "ssl_policy" ($globals.Env.SSL_POLICY | default "Mozilla-Intermediate") }}
{{- $_ := set $config "enable_debug_endpoint" ($globals.Env.DEBUG_ENDPOINT | default "false") }}
{{- $_ := set $config "hsts" ($globals.Env.HSTS | default "max-age=31536000") }}
@ -76,7 +77,7 @@
* The return value will be added to the dot dict with key "ip".
*/}}
{{- define "container_ip" }}
{{- $ip := "" }}
{{- $ipv4 := "" }}
{{- $ipv6 := "" }}
# networks:
{{- range sortObjectsByKeysAsc $.container.Networks "Name" }}
@ -92,17 +93,17 @@
{{- /* Handle containers in host nework mode */}}
{{- if (index $.globals.networks "host") }}
# both container and proxy are in host network mode, using localhost IP
{{- $ip = "127.0.0.1" }}
{{- $ipv4 = "127.0.0.1" }}
{{- continue }}
{{- end }}
{{- range sortObjectsByKeysAsc $.globals.CurrentContainer.Networks "Name" }}
{{- if and . .Gateway (not .Internal) }}
# container is in host network mode, using {{ .Name }} gateway IP
{{- $ip = .Gateway }}
{{- $ipv4 = .Gateway }}
{{- break }}
{{- end }}
{{- end }}
{{- if $ip }}
{{- if $ipv4 }}
{{- continue }}
{{- end }}
{{- end }}
@ -112,33 +113,41 @@
{{- end }}
{{- /*
* Do not emit multiple `server` directives for this container if it
* is reachable over multiple networks. This avoids accidentally
* inflating the effective round-robin weight of a server due to the
* redundant upstream addresses that nginx sees as belonging to
* is reachable over multiple networks or multiple IP stacks. This avoids
* accidentally inflating the effective round-robin weight of a server due
* to the redundant upstream addresses that nginx sees as belonging to
* distinct servers.
*/}}
{{- if $ip }}
{{- if or $ipv4 $ipv6 }}
# {{ .Name }} (ignored; reachable but redundant)
{{- continue }}
{{- end }}
# {{ .Name }} (reachable)
{{- if and . .IP }}
{{- $ip = .IP }}
{{- else }}
# /!\ No IPv4 for this network!
{{- $ipv4 = .IP }}
{{- end }}
{{- if and . .GlobalIPv6Address }}
{{- $ipv6 = .GlobalIPv6Address }}
{{- else }}
# /!\ No IPv6 for this network!
{{- end }}
{{- if and (empty $ipv4) (empty $ipv6) }}
# /!\ No IPv4 or IPv6 for this network!
{{- end }}
{{- else }}
# (none)
{{- end }}
# IPv4 address: {{ if $ip }}{{ $ip }}{{ else }}(none usable){{ end }}
# IPv6 address: {{ if $ipv6 }}{{ $ipv6 }}{{ else }}(none usable){{ end }}
{{- $_ := set $ "ip" $ip }}
{{- $_ := set $ "ipv6" $ipv6 }}
{{ if and $ipv6 $.globals.config.prefer_ipv6_network }}
# IPv4 address: {{ if $ipv4 }}{{ $ipv4 }} (ignored; reachable but IPv6 prefered){{ else }}(none usable){{ end }}
# IPv6 address: {{ $ipv6 }}
{{- $_ := set $ "ip" (printf "[%s]" $ipv6) }}
{{- else }}
# IPv4 address: {{ if $ipv4 }}{{ $ipv4 }}{{ else }}(none usable){{ end }}
# IPv6 address: {{ if $ipv6 }}{{ $ipv6 }}{{ if $ipv4 }} (ignored; reachable but IPv4 prefered){{ end }}{{ else }}(none usable){{ end }}
{{- if $ipv4 }}
{{- $_ := set $ "ip" $ipv4 }}
{{- else if $ipv6}}
{{- $_ := set $ "ip" (printf "[%s]" $ipv6) }}
{{- end }}
{{- end }}
{{- end }}
{{- /*
@ -348,18 +357,12 @@ upstream {{ $vpath.upstream }} {
{{- $args := dict "globals" $.globals "container" $container }}
{{- template "container_ip" $args }}
{{- $ip := $args.ip }}
{{- $ipv6 := $args.ipv6 }}
{{- $args = dict "container" $container "path" $path "port" $port }}
{{- template "container_port" $args }}
{{- if or $ip $ipv6 }}
{{- $servers = add1 $servers }}
{{- end }}
{{- if $ip }}
{{- $servers = add1 $servers }}
server {{ $ip }}:{{ $args.port }};
{{- end }}
{{- if $ipv6 }}
server [{{ $ipv6 }}]:{{ $args.port }};
{{- end }}
{{- end }}
{{- end }}
{{- /* nginx-proxy/nginx-proxy#1105 */}}