Add cleveldb build for Amazon Linux (#3976)

* Add cleveldb build for Amazon Linux

In attempting to build Tendermint binaries with cleveldb support that we
can use for load testing (see https://github.com/interchainio/got), it
became apparent that we need a bit of a simpler build process for this
kind of executable. Since we're basing our load testing infrastructure
on Amazon Linux, it makes sense to support such a build process for
Amazon Linux in a platform-independent way.

This PR allows one to simply build the Amazon Linux-compatible binary
using Docker on one's local machine. It first builds an Amazon
Linux-based build image with Go v1.12.9, and then it uses that image to
build the cleveldb version of Tendermint.

This should, in theory, be compatible with CentOS too, but that's yet to
be tested.

* Add comment describing the new Makefile target

* Add missing PHONY entry for new Makefile target

* Expand on Makefile comment

DOCKER/Dockerfile.build_c-amazonlinux

@@ -0,0 +1,28 @@
+FROM amazonlinux:2
+
+RUN yum -y update && \
+    yum -y install wget
+
+RUN wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm && \
+    rpm -ivh epel-release-latest-7.noarch.rpm
+
+RUN yum -y groupinstall "Development Tools"
+RUN yum -y install leveldb-devel which
+
+ENV GOVERSION=1.12.9
+
+RUN cd /tmp && \
+    wget https://dl.google.com/go/go${GOVERSION}.linux-amd64.tar.gz && \
+    tar -C /usr/local -xf go${GOVERSION}.linux-amd64.tar.gz && \
+    mkdir -p /go/src && \
+    mkdir -p /go/bin
+
+ENV PATH=$PATH:/usr/local/go/bin:/go/bin
+ENV GOBIN=/go/bin
+ENV GOPATH=/go/src
+
+RUN mkdir -p /tendermint
+WORKDIR /tendermint
+
+CMD ["/usr/bin/make", "build_c"]
+

DOCKER/Makefile

@@ -13,4 +13,7 @@ build_testing:
 push_develop:
 	docker push "tendermint/tendermint:develop"
 
+build_amazonlinux_buildimage:
+	docker build -t "tendermint/tendermint:build_c-amazonlinux" -f Dockerfile.build_c-amazonlinux .
+
 .PHONY: build build_develop push push_develop

Makefile

@@ -27,6 +27,13 @@ build:
 build_c:
 	CGO_ENABLED=1 go build $(BUILD_FLAGS) -tags "$(BUILD_TAGS) cleveldb" -o $(OUTPUT) ./cmd/tendermint/
 
+# Runs `make build_c` from within an Amazon Linux (v2)-based Docker build
+# container in order to build an Amazon Linux-compatible binary. Produces a
+# compatible binary at ./build/tendermint
+build_c-amazonlinux:
+	$(MAKE) -C ./DOCKER build_amazonlinux_buildimage
+	docker run --rm -it -v `pwd`:/tendermint tendermint/tendermint:build_c-amazonlinux
+
 build_race:
 	CGO_ENABLED=1 go build -race $(BUILD_FLAGS) -tags $(BUILD_TAGS) -o $(OUTPUT) ./cmd/tendermint
 
@@ -327,4 +334,4 @@ contract-tests:
 # To avoid unintended conflicts with file names, always add to .PHONY
 # unless there is a reason not to.
 # https://www.gnu.org/software/make/manual/html_node/Phony-Targets.html
-.PHONY: check build build_race build_abci dist install install_abci check_tools get_tools update_tools draw_deps get_protoc protoc_abci protoc_libs gen_certs clean_certs grpc_dbserver test_cover test_apps test_persistence test_p2p test test_race test_integrations test_release test100 vagrant_test fmt rpc-docs build-linux localnet-start localnet-stop build-docker build-docker-localnode sentry-start sentry-config sentry-stop build-slate protoc_grpc protoc_all build_c install_c test_with_deadlock cleanup_after_test_with_deadlock lint build-contract-tests-hooks contract-tests
+.PHONY: check build build_race build_abci dist install install_abci check_tools get_tools update_tools draw_deps get_protoc protoc_abci protoc_libs gen_certs clean_certs grpc_dbserver test_cover test_apps test_persistence test_p2p test test_race test_integrations test_release test100 vagrant_test fmt rpc-docs build-linux localnet-start localnet-stop build-docker build-docker-localnode sentry-start sentry-config sentry-stop build-slate protoc_grpc protoc_all build_c install_c test_with_deadlock cleanup_after_test_with_deadlock lint build-contract-tests-hooks contract-tests build_c-amazonlinux