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Add bare-bones "/etc/nsswitch.conf" for "netgo" to know it should check "/etc/hosts" before doing DNS lookups #84

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Merged
merged 1 commit into from
Oct 11, 2017
Merged

Add bare-bones "/etc/nsswitch.conf" for "netgo" to know it should check "/etc/hosts" before doing DNS lookups #84

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6 changes: 6 additions & 0 deletions 17.06/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,12 @@ FROM alpine:3.6
RUN apk add --no-cache \
ca-certificates

# set up nsswitch.conf for Go's "netgo" implementation (which Docker explicitly uses)
# - https://github.com/docker/docker-ce/blob/v17.09.0-ce/components/engine/hack/make.sh#L149
# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf

ENV DOCKER_CHANNEL stable
ENV DOCKER_VERSION 17.06.2-ce
# TODO ENV DOCKER_SHA256
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6 changes: 6 additions & 0 deletions 17.07/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,12 @@ FROM alpine:3.6
RUN apk add --no-cache \
ca-certificates

# set up nsswitch.conf for Go's "netgo" implementation (which Docker explicitly uses)
# - https://github.com/docker/docker-ce/blob/v17.09.0-ce/components/engine/hack/make.sh#L149
# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf

ENV DOCKER_CHANNEL edge
ENV DOCKER_VERSION 17.07.0-ce
# TODO ENV DOCKER_SHA256
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6 changes: 6 additions & 0 deletions 17.09/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,12 @@ FROM alpine:3.6
RUN apk add --no-cache \
ca-certificates

# set up nsswitch.conf for Go's "netgo" implementation (which Docker explicitly uses)
# - https://github.com/docker/docker-ce/blob/v17.09.0-ce/components/engine/hack/make.sh#L149
# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf

ENV DOCKER_CHANNEL stable
ENV DOCKER_VERSION 17.09.0-ce
# TODO ENV DOCKER_SHA256
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6 changes: 6 additions & 0 deletions 17.10-rc/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,12 @@ FROM alpine:3.6
RUN apk add --no-cache \
ca-certificates

# set up nsswitch.conf for Go's "netgo" implementation (which Docker explicitly uses)
# - https://github.com/docker/docker-ce/blob/v17.09.0-ce/components/engine/hack/make.sh#L149
# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf

ENV DOCKER_CHANNEL test
ENV DOCKER_VERSION 17.10.0-ce-rc1
# TODO ENV DOCKER_SHA256
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6 changes: 6 additions & 0 deletions Dockerfile.template
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,12 @@ FROM alpine:%%ALPINE-VERSION%%
RUN apk add --no-cache \
ca-certificates

# set up nsswitch.conf for Go's "netgo" implementation (which Docker explicitly uses)
# - https://github.com/docker/docker-ce/blob/v17.09.0-ce/components/engine/hack/make.sh#L149
# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf

ENV DOCKER_CHANNEL %%DOCKER-CHANNEL%%
ENV DOCKER_VERSION %%DOCKER-VERSION%%
# TODO ENV DOCKER_SHA256
Expand Down