[Buildroot] [RFC PATCH v1 1/1] qemu_x86_64_docker: add new qemu defconfig

Francis Laniel flaniel at linux.microsoft.com
Thu Apr 14 17:28:57 UTC 2022 

This defconfig permits building an image with a "docker" ready kernel and docker
related software installed.

Signed-off-by: Francis Laniel <flaniel at linux.microsoft.com>
---
 DEVELOPERS                             |   2 +
 board/qemu/x86_64_docker/linux.config  | 112 +++++++++++++++++++++++++
 board/qemu/x86_64_docker/post-build.sh |  11 +++
 board/qemu/x86_64_docker/readme.txt    |   7 ++
 configs/qemu_x86_64_docker_defconfig   |  49 +++++++++++
 5 files changed, 181 insertions(+)
 create mode 100644 board/qemu/x86_64_docker/linux.config
 create mode 100755 board/qemu/x86_64_docker/post-build.sh
 create mode 100644 board/qemu/x86_64_docker/readme.txt
 create mode 100644 configs/qemu_x86_64_docker_defconfig

diff --git a/DEVELOPERS b/DEVELOPERS
index ca9decb58f..8a6374977a 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -969,6 +969,8 @@ F:	package/ipmitool/
 F:	package/odhcploc/
 
 N:	Francis Laniel <flaniel at linux.microsoft.com>
+F:	board/qemu/x86_64_docker
+F:	configs/qemu_x86_64_docker_defconfig
 F:	package/pahole/
 F:	package/sysdig/
 F:	package/tbb/
diff --git a/board/qemu/x86_64_docker/linux.config b/board/qemu/x86_64_docker/linux.config
new file mode 100644
index 0000000000..e64b1e76e3
--- /dev/null
+++ b/board/qemu/x86_64_docker/linux.config
@@ -0,0 +1,112 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_CGROUPS=y
+CONFIG_MEMCG=y
+CONFIG_BLK_CGROUP=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_CFS_BANDWIDTH=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_CGROUP_PIDS=y
+CONFIG_CGROUP_RDMA=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_PERF=y
+CONFIG_CGROUP_BPF=y
+CONFIG_CGROUP_MISC=y
+CONFIG_USER_NS=y
+CONFIG_SMP=y
+CONFIG_HYPERVISOR_GUEST=y
+CONFIG_PARAVIRT=y
+# CONFIG_GCC_PLUGINS is not set
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_BLK_DEV_THROTTLING=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_XFRM_USER=m
+CONFIG_INET=y
+CONFIG_INET_ESP=y
+CONFIG_NETFILTER=y
+CONFIG_BRIDGE_NETFILTER=y
+CONFIG_NF_CONNTRACK=y
+CONFIG_NF_CONNTRACK_FTP=y
+CONFIG_NF_CONNTRACK_TFTP=y
+CONFIG_NETFILTER_XT_MARK=y
+CONFIG_NETFILTER_XT_MATCH_ADDRTYPE=y
+CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
+CONFIG_NETFILTER_XT_MATCH_IPVS=y
+CONFIG_IP_VS=y
+CONFIG_IP_VS_PROTO_TCP=y
+CONFIG_IP_VS_PROTO_UDP=y
+CONFIG_IP_VS_RR=y
+CONFIG_IP_VS_NFCT=y
+CONFIG_IP_NF_IPTABLES=y
+CONFIG_IP_NF_FILTER=y
+CONFIG_IP_NF_NAT=y
+CONFIG_IP_NF_TARGET_MASQUERADE=y
+CONFIG_IP_NF_TARGET_REDIRECT=y
+CONFIG_BRIDGE=y
+CONFIG_BRIDGE_VLAN_FILTERING=y
+CONFIG_VLAN_8021Q=y
+CONFIG_NET_SCHED=y
+CONFIG_NET_CLS_CGROUP=y
+CONFIG_CGROUP_NET_PRIO=y
+# CONFIG_WIRELESS is not set
+CONFIG_PCI=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_SCSI_VIRTIO=y
+CONFIG_ATA=y
+CONFIG_ATA_PIIX=y
+CONFIG_NETDEVICES=y
+CONFIG_DUMMY=y
+CONFIG_MACVLAN=y
+CONFIG_IPVLAN=y
+CONFIG_VXLAN=y
+CONFIG_VETH=y
+CONFIG_VIRTIO_NET=y
+CONFIG_NE2K_PCI=y
+CONFIG_8139CP=y
+# CONFIG_WLAN is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_HW_RANDOM_VIRTIO=m
+CONFIG_DRM=y
+CONFIG_DRM_QXL=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_DRM_BOCHS=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_HDA_INTEL=y
+CONFIG_SND_HDA_GENERIC=y
+CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_UHCI_HCD=y
+CONFIG_USB_STORAGE=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_BALLOON=y
+CONFIG_VIRTIO_INPUT=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_FS_POSIX_ACL=y
+CONFIG_EXT4_FS_SECURITY=y
+CONFIG_AUTOFS4_FS=y
+CONFIG_OVERLAY_FS=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_KEYS=y
+CONFIG_SECURITY=y
+CONFIG_SECURITY_SELINUX=y
+CONFIG_SECURITY_APPARMOR=y
+CONFIG_DEFAULT_SECURITY_DAC=y
+CONFIG_UNWINDER_FRAME_POINTER=y
diff --git a/board/qemu/x86_64_docker/post-build.sh b/board/qemu/x86_64_docker/post-build.sh
new file mode 100755
index 0000000000..bf83a002c2
--- /dev/null
+++ b/board/qemu/x86_64_docker/post-build.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -u
+set -e
+
+# Add a console on tty1
+if [ -e ${TARGET_DIR}/etc/inittab ]; then
+    grep -qE '^tty1::' ${TARGET_DIR}/etc/inittab || \
+	sed -i '/GENERIC_SERIAL/a\
+tty1::respawn:/sbin/getty -L  tty1 0 vt100 # QEMU graphical window' ${TARGET_DIR}/etc/inittab
+fi
diff --git a/board/qemu/x86_64_docker/readme.txt b/board/qemu/x86_64_docker/readme.txt
new file mode 100644
index 0000000000..a7bf2b4e32
--- /dev/null
+++ b/board/qemu/x86_64_docker/readme.txt
@@ -0,0 +1,7 @@
+Run the emulation with:
+
+  qemu-system-x86_64 -M pc -kernel output/images/bzImage -drive file=output/images/rootfs.ext4,if=virtio,format=raw -append "rootwait root=/dev/vda console=tty1 console=ttyS0" -serial stdio -net nic,model=virtio -net user # qemu_x86_64_docker_defconfig
+
+Optionally add -smp N to emulate a SMP system with N CPUs.
+
+The login prompt will appear in the graphical window.
diff --git a/configs/qemu_x86_64_docker_defconfig b/configs/qemu_x86_64_docker_defconfig
new file mode 100644
index 0000000000..359b1ae75f
--- /dev/null
+++ b/configs/qemu_x86_64_docker_defconfig
@@ -0,0 +1,49 @@
+# Architecture
+BR2_x86_64=y
+
+# System
+BR2_SYSTEM_DHCP="eth0"
+
+# Filesystem
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+# The "just enough" size for all packages is 270M (found by dichotomy fround
+# 60M).
+# We add "extra" 50M so dockerd can mount /var/lib/docker and there is a bit
+# of space for some small docker images.
+BR2_TARGET_ROOTFS_EXT2_SIZE="320M"
+# BR2_TARGET_ROOTFS_TAR is not set
+
+# Image
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/qemu/x86_64_docker/post-build.sh"
+
+# Image
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
+
+# Linux headers same as kernel
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
+
+# Kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15.18"
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/x86_64_docker/linux.config"
+BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF=y
+
+# Toolchain
+BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
+
+# host-qemu for gitlab testing
+BR2_PACKAGE_HOST_QEMU=y
+BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE=y
+
+# docker related package
+BR2_PACKAGE_DOCKER_CLI=y
+BR2_PACKAGE_DOCKER_COMPOSE=y
+BR2_PACKAGE_CONTAINERD=y
+BR2_PACKAGE_DOCKER_ENGINE=y
+
+# We need to be able to connect to https:// to pull docker images.
+BR2_PACKAGE_CA_CERTIFICATES=y
-- 
2.25.1

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