Makefile: Switch to a new version of kube-cross

This means we're now using a newer version of go and
arm-linux-gnueabihf-gcc instead of arm-linux-gnueabi-gcc

Also, switch to an alpine base image for amd64

.gitignore

@@ -2,6 +2,8 @@ dist/*.tar.gz
 dist/flanneld*
 dist/iptables-*
 dist/libpthread*
+dist/ld64*
+dist/libc*
 dist/*.aci
 dist/*.docker
 cover.out

Dockerfile.amd64

@@ -1,10 +1,12 @@
-FROM busybox:1.25.0-glibc
+FROM frolvlad/alpine-glibc
 
 MAINTAINER Tom Denham <tom@tigera.io>
 
-COPY dist/flanneld-amd64 /opt/bin/flanneld
-COPY dist/iptables-amd64 /usr/local/bin/iptables
+ENV FLANNEL_ARCH=amd64
+
+COPY dist/flanneld-$FLANNEL_ARCH /opt/bin/flanneld
+COPY dist/iptables-$FLANNEL_ARCH /usr/local/bin/iptables
 COPY dist/mk-docker-opts.sh /opt/bin/
-COPY dist/libpthread.so.0-amd64 /lib/libpthread.so.0
+
 CMD ["/opt/bin/flanneld"]
 

Dockerfile.arm

@@ -2,8 +2,14 @@ FROM armel/busybox:glibc
 
 MAINTAINER Tom Denham <tom@tigera.io>
 
-COPY dist/flanneld-arm /opt/bin/flanneld
-COPY dist/iptables-arm /usr/local/bin/iptables
+ENV FLANNEL_ARCH=arm
+
+COPY dist/flanneld-$FLANNEL_ARCH /opt/bin/flanneld
+COPY dist/iptables-$FLANNEL_ARCH /usr/local/bin/iptables
 COPY dist/mk-docker-opts.sh /opt/bin/
-COPY dist/libpthread.so.0-arm /lib/libpthread.so.0
+COPY dist/libpthread.so.0-$FLANNEL_ARCH /lib/libpthread.so.0
+COPY dist/ld64.so.1-$FLANNEL_ARCH /lib/ld64.so.1
+COPY dist/libc.so.6-$FLANNEL_ARCH /lib/libc.so.6
+
+
 CMD ["/opt/bin/flanneld"]

Dockerfile.arm64

@@ -2,9 +2,11 @@ FROM aarch64/busybox:glibc
 
 MAINTAINER Tom Denham <tom@tigera.io>
 
-COPY dist/flanneld-arm64 /opt/bin/flanneld
-COPY dist/iptables-arm64 /usr/local/bin/iptables
-COPY dist/mk-docker-opts.sh /opt/bin/
-COPY dist/libpthread.so.0-arm64 /lib/libpthread.so.0
-CMD ["/opt/bin/flanneld"]
+ENV FLANNEL_ARCH=arm64
 
+COPY dist/flanneld-$FLANNEL_ARCH /opt/bin/flanneld
+COPY dist/iptables-$FLANNEL_ARCH /usr/local/bin/iptables
+COPY dist/mk-docker-opts.sh /opt/bin/
+COPY dist/libpthread.so.0-$FLANNEL_ARCH /lib/libpthread.so.0
+COPY dist/ld64.so.1-$FLANNEL_ARCH /lib/ld64.so.1
+COPY dist/libc.so.6-$FLANNEL_ARCH /lib/libc.so.6

Dockerfile.ppc64le

@@ -2,9 +2,11 @@ FROM ppc64le/busybox:glibc
 
 MAINTAINER Tom Denham <tom@tigera.io>
 
-COPY dist/flanneld-ppc64le /opt/bin/flanneld
-COPY dist/iptables-ppc64le /usr/local/bin/iptables
-COPY dist/mk-docker-opts.sh /opt/bin/
-COPY dist/libpthread.so.0-ppc64le /lib/libpthread.so.0
-CMD ["/opt/bin/flanneld"]
+ENV FLANNEL_ARCH=ppc64le
 
+COPY dist/flanneld-$FLANNEL_ARCH /opt/bin/flanneld
+COPY dist/iptables-$FLANNEL_ARCH /usr/local/bin/iptables
+COPY dist/mk-docker-opts.sh /opt/bin/
+COPY dist/libpthread.so.0-$FLANNEL_ARCH /lib/libpthread.so.0
+COPY dist/ld64.so.1-$FLANNEL_ARCH /lib/ld64.so.1
+COPY dist/libc.so.6-$FLANNEL_ARCH /lib/libc.so.6

Dockerfile.s390x

@@ -2,10 +2,13 @@ FROM s390x/busybox:glibc
 
 MAINTAINER Tom Denham <tom@tigera.io>
 
-COPY dist/flanneld-s390x /opt/bin/flanneld
-COPY dist/iptables-s390x /usr/local/bin/iptables
+ENV FLANNEL_ARCH=s390x
+
+COPY dist/flanneld-$FLANNEL_ARCH /opt/bin/flanneld
+COPY dist/iptables-$FLANNEL_ARCH /usr/local/bin/iptables
 COPY dist/mk-docker-opts.sh /opt/bin/
-COPY dist/libpthread.so.0-s390x /lib/libpthread.so.0
-COPY dist/ld64.so.1 /lib/ld64.so.1
-COPY dist/libc.so.6 /lib/libc.so.6
+COPY dist/libpthread.so.0-$FLANNEL_ARCH /lib/libpthread.so.0
+COPY dist/ld64.so.1-$FLANNEL_ARCH /lib/ld64.so.1
+COPY dist/libc.so.6-$FLANNEL_ARCH /lib/libc.so.6
+
 CMD ["/opt/bin/flanneld"]

Makefile

@@ -15,32 +15,30 @@ PACKAGES_EXPANDED=$(PACKAGES:%=github.com/coreos/flannel/%)
 
 # Set the (cross) compiler to use for different architectures
 ifeq ($(ARCH),amd64)
-	LIB_DIR=x86_64-linux-gnu
+	LIB_DIR=/lib/x86_64-linux-gnu
 	CC=gcc
 endif
 ifeq ($(ARCH),arm)
-	LIB_DIR=arm-linux-gnueabi
-	CC=arm-linux-gnueabi-gcc
+	LIB_DIR=/usr/arm-linux-gnueabihf/lib
+	CC=arm-linux-gnueabihf-gcc
 endif
 ifeq ($(ARCH),arm64)
-	LIB_DIR=aarch64-linux-gnu
+	LIB_DIR=/usr/aarch64-linux-gnu/lib
 	CC=aarch64-linux-gnu-gcc
 endif
 ifeq ($(ARCH),ppc64le)
-	LIB_DIR=powerpc64le-linux-gnu
+	LIB_DIR=/usr/powerpc64le-linux-gnu/lib
 	CC=powerpc64le-linux-gnu-gcc
 endif
 ifeq ($(ARCH),s390x)
 	LIB_DIR=s390x-linux-gnu
 	CC=s390x-linux-gnu-gcc
 endif
-GOARM=6
-ifeq ($(ARCH),s390x)
-	# kube-cross:v1.7.4-1 supports s390x
-	KUBE_CROSS_TAG=v1.7.4-1
-else
-	KUBE_CROSS_TAG=v1.6.2-2
-endif
+
+GOARM=7
+
+# List images with gcloud alpha container images list-tags gcr.io/google_containers/kube-cross
+KUBE_CROSS_TAG=v1.7.5-3
 IPTABLES_VERSION=1.4.21
 
 dist/flanneld: $(shell find . -type f  -name '*.go')
@@ -117,16 +115,11 @@ dist/flanneld-$(ARCH):
 		mv dist/flanneld dist/flanneld-$(ARCH) && \
 		file dist/flanneld-$(ARCH)'
 
-## Busybox images are missing pthread. Pull it out of the kube-cross image
-dist/libpthread.so.0-$(ARCH):
-ifeq ($(ARCH),s390x)
-	# Busybox images are having older version of libc.so.6 and ld64.so.1. Pull it out of the kube-cross image
-	docker run --rm -v `pwd`:/host gcr.io/google_containers/kube-cross:$(KUBE_CROSS_TAG) cp /usr/$(LIB_DIR)/lib/libpthread.so.0 /host/dist/libpthread.so.0-$(ARCH)
-	docker run --rm -v `pwd`:/host gcr.io/google_containers/kube-cross:$(KUBE_CROSS_TAG) cp /usr/$(LIB_DIR)/lib/libc-2.23.so /host/dist/libc.so.6
-	docker run --rm -v `pwd`:/host gcr.io/google_containers/kube-cross:$(KUBE_CROSS_TAG) cp /usr/$(LIB_DIR)/lib/ld-2.23.so /host/dist/ld64.so.1
-else
-	docker run --rm -v `pwd`:/host gcr.io/google_containers/kube-cross:$(KUBE_CROSS_TAG) cp /lib/$(LIB_DIR)/libpthread.so.0 /host/dist/libpthread.so.0-$(ARCH)
-endif
+## Busybox images need updated libs. Pull them out of the kube-cross image
+dist/libpthread.so.0-$(ARCH) dist/libc.so.6-$(ARCH) dist/ld64.so.1-$(ARCH):
+	docker run --rm -v $(CURDIR):/host gcr.io/google_containers/kube-cross:$(KUBE_CROSS_TAG) cp $(LIB_DIR)/libc-2.23.so /host/dist/libc.so.6-$(ARCH)
+	docker run --rm -v $(CURDIR):/host gcr.io/google_containers/kube-cross:$(KUBE_CROSS_TAG) cp $(LIB_DIR)/ld-2.23.so /host/dist/ld64.so.1-$(ARCH)
+	docker run --rm -v $(CURDIR):/host gcr.io/google_containers/kube-cross:$(KUBE_CROSS_TAG) cp $(LIB_DIR)/libpthread.so.0 /host/dist/libpthread.so.0-$(ARCH)
 
 ## Build an architecture specific iptables binary
 dist/iptables-$(ARCH):