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package/docker-engine: introduce option to build CLI client statically

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This is useful when bind-mounting the docker client binary into
containers for a docker-in-docker setup.

The Docker CLI communicates with the daemon over a socket. It is
sometimes useful to bind-mount the Docker CLI and socket into containers at
run-time, so that scripts within the containers can call the Docker API
in the host using a client compatible with the host daemon.

Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Christian Stewart 2017-03-19 02:20:42 -04:00 committed by Thomas Petazzoni
parent 8273895a58
commit 8d060da530
2 changed files with 12 additions and 1 deletions
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6
package/docker-engine/Config.in
View File

@ -25,6 +25,12 @@ config BR2_PACKAGE_DOCKER_ENGINE_DAEMON
config BR2_PACKAGE_DOCKER_ENGINE_EXPERIMENTAL
bool "build experimental features"
config BR2_PACKAGE_DOCKER_ENGINE_STATIC_CLIENT
bool "build static client"
depends on !BR2_STATIC_LIBS
help
Build a static docker client.
if BR2_PACKAGE_DOCKER_ENGINE_DAEMON
config BR2_PACKAGE_DOCKER_ENGINE_DRIVER_BTRFS

7
package/docker-engine/docker-engine.mk
View File

@ -28,7 +28,12 @@ DOCKER_ENGINE_GLDFLAGS = \
ifeq ($(BR2_STATIC_LIBS),y)
DOCKER_ENGINE_GLDFLAGS += -extldflags '-static'
else
ifeq ($(BR2_PACKAGE_DOCKER_ENGINE_STATIC_CLIENT),y)
DOCKER_ENGINE_GLDFLAGS_DOCKER += -extldflags '-static'
endif
endif
DOCKER_ENGINE_BUILD_TAGS = cgo exclude_graphdriver_zfs autogen
DOCKER_ENGINE_BUILD_TARGETS = docker
@ -100,7 +105,7 @@ define DOCKER_ENGINE_BUILD_CMDS
$(HOST_DIR)/usr/bin/go build -v \
-o $(@D)/bin/$(target) \
-tags "$(DOCKER_ENGINE_BUILD_TAGS)" \
-ldflags "$(DOCKER_ENGINE_GLDFLAGS)" \
-ldflags "$(DOCKER_ENGINE_GLDFLAGS) $(DOCKER_ENGINE_GLDFLAGS_$(call UPPERCASE,$(target)))" \
github.com/docker/docker/cmd/$(target)
)
endef