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Ensure docker group exists in the container.

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The --groups command will fail if the group is not defined in
/etc/groups, even though it is specified by GID.

By coincidence, the group happens to be there for many installations of
Ubuntu 18.04 (which uses 999 for the Docker group), but it is strangely
absent in others (which use 130).

Fixes #2765
This commit is contained in:
Adin Scannell
2020-05-25 18:21:03 -07:00
parent ba2bf9fc13
commit a6325cca51
1 changed files with 6 additions and 2 deletions
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tools/bazel.mk
+6 -2
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@@ -21,7 +21,8 @@ BRANCH_NAME := $(shell (git branch --show-current 2>/dev/null || \
# Bazel container configuration (see below).
USER ?= gvisor
DOCKER_NAME ?= gvisor-bazel-$(shell readlink -m $(CURDIR) | md5sum | cut -c1-8)
HASH ?= $(shell readlink -m $(CURDIR) | md5sum | cut -c1-8)
DOCKER_NAME ?= gvisor-bazel-$(HASH)
DOCKER_PRIVILEGED ?= --privileged
BAZEL_CACHE := $(shell readlink -m ~/.cache/bazel/)
GCLOUD_CONFIG := $(shell readlink -m ~/.config/gcloud/)
@@ -40,6 +41,7 @@ FULL_DOCKER_RUN_OPTIONS += -v "$(DOCKER_SOCKET):$(DOCKER_SOCKET)"
DOCKER_GROUP := $(shell stat -c '%g' $(DOCKER_SOCKET))
ifneq ($(GID),$(DOCKER_GROUP))
USERADD_OPTIONS += --groups $(DOCKER_GROUP)
GROUPADD_DOCKER += groupadd --gid $(DOCKER_GROUP) --non-unique docker-$(HASH) &&
FULL_DOCKER_RUN_OPTIONS += --group-add $(DOCKER_GROUP)
endif
endif
@@ -71,10 +73,12 @@ bazel-server-start: load-default ## Starts the bazel server.
$(FULL_DOCKER_RUN_OPTIONS) \
gvisor.dev/images/default \
sh -c "groupadd --gid $(GID) --non-unique $(USER) && \
$(GROUPADD_DOCKER) \
useradd --uid $(UID) --non-unique --no-create-home --gid $(GID) $(USERADD_OPTIONS) -d $(HOME) $(USER) && \
bazel version && \
exec tail --pid=\$$(bazel info server_pid) -f /dev/null"
@while :; do if docker logs $(DOCKER_NAME) 2>/dev/null | grep "Build label:" >/dev/null; then break; fi; sleep 1; done
@while :; do if docker logs $(DOCKER_NAME) 2>/dev/null | grep "Build label:" >/dev/null; then break; fi; \
if ! docker ps | grep $(DOCKER_NAME); then exit 1; else sleep 1; fi; done
.PHONY: bazel-server-start
bazel-shutdown: ## Shuts down a running bazel server.