Add an nsswitch.conf file to help with file-based resolution

Signed-off-by: Dave Henderson <dhenderson@gmail.com>
caddyserver · Jun 25, 2020 · 4c35525 · 4c35525
1 parent 2b08aec
commit 4c35525
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diff --git a/2.0/alpine/Dockerfile b/2.0/alpine/Dockerfile
@@ -36,6 +36,10 @@ RUN set -eux; \
 	chmod +x /usr/bin/caddy; \
 	caddy version
 
+# set up nsswitch.conf for Go's "netgo" implementation
+# - https://github.com/docker-library/golang/blob/master/1.14/alpine3.12/Dockerfile#L9
+RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+
 # See https://caddyserver.com/docs/conventions#file-locations for details
 ENV XDG_CONFIG_HOME=/config
 ENV XDG_DATA_HOME=/data

diff --git a/2.1/alpine/Dockerfile b/2.1/alpine/Dockerfile
@@ -36,6 +36,10 @@ RUN set -eux; \
 	chmod +x /usr/bin/caddy; \
 	caddy version
 
+# set up nsswitch.conf for Go's "netgo" implementation
+# - https://github.com/docker-library/golang/blob/master/1.14/alpine3.12/Dockerfile#L9
+RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+
 # See https://caddyserver.com/docs/conventions#file-locations for details
 ENV XDG_CONFIG_HOME=/config
 ENV XDG_DATA_HOME=/data

diff --git a/Dockerfile.tmpl b/Dockerfile.tmpl
@@ -36,6 +36,10 @@ RUN set -eux; \
 	chmod +x /usr/bin/caddy; \
 	caddy version
 
+# set up nsswitch.conf for Go's "netgo" implementation
+# - https://github.com/docker-library/golang/blob/master/1.14/alpine3.12/Dockerfile#L9
+RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+
 # See https://caddyserver.com/docs/conventions#file-locations for details
 ENV XDG_CONFIG_HOME=/config
 ENV XDG_DATA_HOME=/data