From 56e470dcdae3581e4396f55411d634f76dd137ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20Darcel?= <tuxity@users.noreply.github.com>
Date: Sun, 2 Feb 2020 22:09:22 -0600
Subject: [PATCH] Start daemon with Unix socket only

Mostly reproduce flow of https://github.com/docker-library/docker/blob/master/19.03/dind/dockerd-entrypoint.sh#L130
TCP socket with or without TLS isn't really needed for our usecase so
it's disable
---
 docker.go                            | 5 ++++-
 docker/docker/Dockerfile.linux.amd64 | 2 ++
 docker/docker/Dockerfile.linux.arm   | 2 ++
 docker/docker/Dockerfile.linux.arm64 | 2 ++
 4 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/docker.go b/docker.go
index e94250b..b9bb158 100644
--- a/docker.go
+++ b/docker.go
@@ -330,7 +330,10 @@ func commandPush(build Build, tag string) *exec.Cmd {
 
 // helper function to create the docker daemon command.
 func commandDaemon(daemon Daemon) *exec.Cmd {
-	args := []string{"--data-root", daemon.StoragePath}
+	args := []string{
+		"--data-root", daemon.StoragePath,
+		"--host=unix:///var/run/docker.sock",
+	}
 
 	if daemon.StorageDriver != "" {
 		args = append(args, "-s", daemon.StorageDriver)
diff --git a/docker/docker/Dockerfile.linux.amd64 b/docker/docker/Dockerfile.linux.amd64
index 41df44e..aa9924b 100644
--- a/docker/docker/Dockerfile.linux.amd64
+++ b/docker/docker/Dockerfile.linux.amd64
@@ -1,4 +1,6 @@
 FROM docker:19.03.5-dind
 
+ENV DOCKER_HOST=unix:///var/run/docker.sock
+
 ADD release/linux/amd64/drone-docker /bin/
 ENTRYPOINT ["/usr/local/bin/dockerd-entrypoint.sh", "/bin/drone-docker"]
diff --git a/docker/docker/Dockerfile.linux.arm b/docker/docker/Dockerfile.linux.arm
index 815ad70..0aacd50 100644
--- a/docker/docker/Dockerfile.linux.arm
+++ b/docker/docker/Dockerfile.linux.arm
@@ -1,4 +1,6 @@
 FROM arm32v6/docker:19.03.5-dind
 
+ENV DOCKER_HOST=unix:///var/run/docker.sock
+
 ADD release/linux/arm/drone-docker /bin/
 ENTRYPOINT ["/usr/local/bin/dockerd-entrypoint.sh", "/bin/drone-docker"]
diff --git a/docker/docker/Dockerfile.linux.arm64 b/docker/docker/Dockerfile.linux.arm64
index ac4887e..2b45b6e 100644
--- a/docker/docker/Dockerfile.linux.arm64
+++ b/docker/docker/Dockerfile.linux.arm64
@@ -1,4 +1,6 @@
 FROM arm64v8/docker:19.03.5-dind
 
+ENV DOCKER_HOST=unix:///var/run/docker.sock
+
 ADD release/linux/arm64/drone-docker /bin/
 ENTRYPOINT ["/usr/local/bin/dockerd-entrypoint.sh", "/bin/drone-docker"]