From d004c1bbd368560434e7301b47f42971ef6e919d Mon Sep 17 00:00:00 2001
From: Benjamin Wang <wachao@vmware.com>
Date: Fri, 23 Dec 2022 18:38:40 +0800
Subject: [PATCH] 3.5: remove the dependency on busybox

Signed-off-by: Benjamin Wang <wachao@vmware.com>
---
 Dockerfile-release.amd64   | 14 +++++---------
 Dockerfile-release.arm64   | 12 ++++--------
 Dockerfile-release.ppc64le | 11 ++++-------
 Dockerfile-release.s390x   | 12 ++++--------
 nsswitch.conf              |  2 ++
 scripts/build-docker       |  2 ++
 6 files changed, 21 insertions(+), 32 deletions(-)
 create mode 100644 nsswitch.conf

diff --git a/Dockerfile-release.amd64 b/Dockerfile-release.amd64
index 67400b69686..09ed48076bb 100644
--- a/Dockerfile-release.amd64
+++ b/Dockerfile-release.amd64
@@ -1,20 +1,16 @@
-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/
 ADD etcdutl /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 b8ce477afd4..c93763f661b 100644
--- a/Dockerfile-release.arm64
+++ b/Dockerfile-release.arm64
@@ -1,15 +1,11 @@
-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 etcdutl /usr/local/bin/
-ADD var/etcd /var/etcd
-ADD var/lib/etcd /var/lib/etcd
-ENV ETCD_UNSUPPORTED_ARCH=arm64
+
+WORKDIR /var/etcd/
+WORKDIR /var/lib/etcd/
 
 EXPOSE 2379 2380
 
diff --git a/Dockerfile-release.ppc64le b/Dockerfile-release.ppc64le
index 9cfe5d43331..268e397410c 100644
--- a/Dockerfile-release.ppc64le
+++ b/Dockerfile-release.ppc64le
@@ -1,14 +1,11 @@
-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 etcdutl /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.s390x b/Dockerfile-release.s390x
index d901b410c98..4a280551deb 100644
--- a/Dockerfile-release.s390x
+++ b/Dockerfile-release.s390x
@@ -1,15 +1,11 @@
-FROM --platform=linux/s390x busybox:1.34.1 as source
-FROM --platform=linux/s390x gcr.io/distroless/base-debian11
-
-COPY --from=source /bin/sh /bin/sh
-COPY --from=source /bin/mkdir /bin/mkdir
-
+FROM --platform=linux/s390x gcr.io/distroless/static-debian11
 
 ADD etcd /usr/local/bin/
 ADD etcdctl /usr/local/bin/
 ADD etcdutl /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 00000000000..ad46648b308
--- /dev/null
+++ b/nsswitch.conf
@@ -0,0 +1,2 @@
+hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
+
diff --git a/scripts/build-docker b/scripts/build-docker
index a255dc2cb15..698a70d6238 100755
--- a/scripts/build-docker
+++ b/scripts/build-docker
@@ -32,6 +32,8 @@ mkdir -p "${IMAGEDIR}"/var/etcd
 mkdir -p "${IMAGEDIR}"/var/lib/etcd
 cp "${BINARYDIR}"/etcd "${BINARYDIR}"/etcdctl "${BINARYDIR}"/etcdutl "${IMAGEDIR}"
 
+cp ./nsswitch.conf "${IMAGEDIR}"
+
 cat ./"${DOCKERFILE}" > "${IMAGEDIR}"/Dockerfile
 
 if [ -z "$TAG" ]; then