From 8aace73c77250b91c1099d8f97419d3584ea81ba Mon Sep 17 00:00:00 2001
From: Benjamin Wang <wachao@vmware.com>
Date: Fri, 23 Dec 2022 18:43:44 +0800
Subject: [PATCH] 3.4: remove the dependency on busybox

Signed-off-by: Benjamin Wang <wachao@vmware.com>
---
 Dockerfile-release         | 14 +++++---------
 Dockerfile-release.arm64   | 11 ++++-------
 Dockerfile-release.ppc64le | 11 ++++-------
 nsswitch.conf              |  2 ++
 scripts/build-docker.sh    |  2 ++
 5 files changed, 17 insertions(+), 23 deletions(-)
 create mode 100644 nsswitch.conf

diff --git a/Dockerfile-release b/Dockerfile-release
index 25f9271c6..e88b5a37c 100644
--- a/Dockerfile-release
+++ b/Dockerfile-release
@@ -1,19 +1,15 @@
-FROM --platform=linux/amd64 busybox:1.34.1 as source
-FROM --platform=linux/amd64 gcr.io/distroless/base-debian11
-
-COPY --from=source /bin/sh /bin/sh
-COPY --from=source /bin/mkdir /bin/mkdir
+FROM --platform=linux/amd64 gcr.io/distroless/static-debian11
 
 ADD etcd /usr/local/bin/
 ADD etcdctl /usr/local/bin/
-RUN mkdir -p /var/etcd/
-RUN mkdir -p /var/lib/etcd/
+
+WORKDIR /var/etcd/
+WORKDIR /var/lib/etcd/
 
 # Alpine Linux doesn't use pam, which means that there is no /etc/nsswitch.conf,
 # but Golang relies on /etc/nsswitch.conf to check the order of DNS resolving
 # (see https://github.com/golang/go/commit/9dee7771f561cf6aee081c0af6658cc81fac3918)
-# To fix this we just create /etc/nsswitch.conf and add the following line:
-RUN echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf
+ADD nsswitch.conf /etc/nsswitch.conf
 
 EXPOSE 2379 2380
 
diff --git a/Dockerfile-release.arm64 b/Dockerfile-release.arm64
index d960ee440..b8f28264c 100644
--- a/Dockerfile-release.arm64
+++ b/Dockerfile-release.arm64
@@ -1,13 +1,10 @@
-FROM --platform=linux/arm64 busybox:1.34.1 as source
-FROM --platform=linux/arm64 gcr.io/distroless/base-debian11
-
-COPY --from=source /bin/sh /bin/sh
-COPY --from=source /bin/mkdir /bin/mkdir
+FROM --platform=linux/arm64 gcr.io/distroless/static-debian11
 
 ADD etcd /usr/local/bin/
 ADD etcdctl /usr/local/bin/
-ADD var/etcd /var/etcd
-ADD var/lib/etcd /var/lib/etcd
+
+WORKDIR /var/etcd/
+WORKDIR /var/lib/etcd/
 
 EXPOSE 2379 2380
 
diff --git a/Dockerfile-release.ppc64le b/Dockerfile-release.ppc64le
index 74bd72a97..82cab50cd 100644
--- a/Dockerfile-release.ppc64le
+++ b/Dockerfile-release.ppc64le
@@ -1,13 +1,10 @@
-FROM --platform=linux/ppc64le busybox:1.34.1 as source
-FROM --platform=linux/ppc64le gcr.io/distroless/base-debian11
-
-COPY --from=source /bin/sh /bin/sh
-COPY --from=source /bin/mkdir /bin/mkdir
+FROM --platform=linux/ppc64le gcr.io/distroless/static-debian11
 
 ADD etcd /usr/local/bin/
 ADD etcdctl /usr/local/bin/
-ADD var/etcd /var/etcd
-ADD var/lib/etcd /var/lib/etcd
+
+WORKDIR /var/etcd/
+WORKDIR /var/lib/etcd/
 
 EXPOSE 2379 2380
 
diff --git a/nsswitch.conf b/nsswitch.conf
new file mode 100644
index 000000000..ad46648b3
--- /dev/null
+++ b/nsswitch.conf
@@ -0,0 +1,2 @@
+hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
+
diff --git a/scripts/build-docker.sh b/scripts/build-docker.sh
index 1e9db2301..1819d18f1 100755
--- a/scripts/build-docker.sh
+++ b/scripts/build-docker.sh
@@ -37,6 +37,8 @@ mkdir -p "${IMAGEDIR}"/var/etcd
 mkdir -p "${IMAGEDIR}"/var/lib/etcd
 cp "${BINARYDIR}"/etcd "${BINARYDIR}"/etcdctl "${IMAGEDIR}"
 
+cp ./nsswitch.conf "${IMAGEDIR}"
+
 cat ./"${DOCKERFILE}" > "${IMAGEDIR}"/Dockerfile
 
 if [ -z "$TAG" ]; then