121 lines
4.2 KiB
Bash
121 lines
4.2 KiB
Bash
#!/bin/sh
|
|
set -e
|
|
|
|
# Adapted from official docker-library/docker dind entrypoint
|
|
# https://github.com/docker-library/docker/blob/master/24/dind/dockerd-entrypoint.sh
|
|
|
|
if [ -z "$DOCKER_HOST" ]; then
|
|
case "$1" in
|
|
dockerd*)
|
|
# If we're running dockerd, we need to make sure we have cgroups mounted
|
|
if [ ! -d /sys/fs/cgroup ]; then
|
|
mkdir -p /sys/fs/cgroup
|
|
fi
|
|
if ! mountpoint -q /sys/fs/cgroup; then
|
|
mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
|
|
fi
|
|
|
|
# Mount cgroup v2 if available and not mounted
|
|
if [ -e /sys/fs/cgroup/cgroup.controllers ] && ! mountpoint -q /sys/fs/cgroup; then
|
|
mount -t cgroup2 -o nsdelegate cgroup2 /sys/fs/cgroup
|
|
fi
|
|
|
|
# If /sys/fs/cgroup is not a cgroup2 mount, we might need to mount cgroup v1 hierarchies
|
|
if ! mountpoint -q /sys/fs/cgroup || [ "$(stat -f -c %T /sys/fs/cgroup)" != "cgroup2fs" ]; then
|
|
if [ -d /sys/fs/cgroup/cgroup.controllers ]; then
|
|
# It is cgroup2 but maybe not mounted as such?
|
|
# Actually if it exists, it's likely v2.
|
|
:
|
|
else
|
|
# cgroup v1
|
|
for subsystem in $(awk '/^[^#]/ { print $1 }' /proc/cgroups); do
|
|
mkdir -p "/sys/fs/cgroup/$subsystem"
|
|
if ! mountpoint -q "/sys/fs/cgroup/$subsystem"; then
|
|
mount -t cgroup -o "$subsystem" cgroup "/sys/fs/cgroup/$subsystem"
|
|
fi
|
|
done
|
|
fi
|
|
fi
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
# Configure Docker daemon with Kata runtime support
|
|
mkdir -p /etc/docker
|
|
cat > /etc/docker/daemon.json <<EOF
|
|
{
|
|
"storage-driver": "overlay2",
|
|
"log-driver": "json-file",
|
|
"log-opts": {
|
|
"max-size": "10m",
|
|
"max-file": "3"
|
|
},
|
|
"runtimes": {
|
|
"kata": {
|
|
"path": "/usr/bin/containerd-shim-kata-v2",
|
|
"runtimeArgs": [
|
|
"--kata-config",
|
|
"/etc/kata-containers/configuration-qemu.toml"
|
|
]
|
|
},
|
|
"kata-fc": {
|
|
"path": "/usr/bin/containerd-shim-kata-v2",
|
|
"runtimeArgs": [
|
|
"--kata-config",
|
|
"/etc/kata-containers/configuration-fc.toml"
|
|
]
|
|
}
|
|
}
|
|
}
|
|
EOF
|
|
|
|
# Configure Kata to use Firecracker if available
|
|
if [ -f /etc/kata-containers/configuration-fc.toml ] && [ -x /usr/local/bin/firecracker ]; then
|
|
echo "[INFO] Firecracker configuration found"
|
|
# Update path in configuration if needed
|
|
if ! grep -q "path = \"/usr/local/bin/firecracker\"" /etc/kata-containers/configuration-fc.toml 2>/dev/null; then
|
|
if [ -w /etc/kata-containers/configuration-fc.toml ]; then
|
|
sed -i 's|path = ".*firecracker"|path = "/usr/local/bin/firecracker"|g' /etc/kata-containers/configuration-fc.toml || true
|
|
fi
|
|
fi
|
|
|
|
# Update jailer path if available
|
|
if [ -x /usr/local/bin/jailer ]; then
|
|
if ! grep -q "jailer_path = \"/usr/local/bin/jailer\"" /etc/kata-containers/configuration-fc.toml 2>/dev/null; then
|
|
if [ -w /etc/kata-containers/configuration-fc.toml ]; then
|
|
sed -i 's|jailer_path = ".*jailer"|jailer_path = "/usr/local/bin/jailer"|g' /etc/kata-containers/configuration-fc.toml || true
|
|
fi
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
# Enable debug logging if requested
|
|
if [ "${KATA_LOGGING_LEVEL}" = "debug" ]; then
|
|
echo "[INFO] Enabling debug logging for Kata"
|
|
for config in /etc/kata-containers/configuration-*.toml; do
|
|
if [ -f "$config" ]; then
|
|
sed -i 's/enable_debug = false/enable_debug = true/g' "$config"
|
|
sed -i 's/#log_path = .*/log_path = "\/var\/log\/kata\/kata.log"/g' "$config"
|
|
sed -i 's/level = "info"/level = "debug"/g' "$config"
|
|
fi
|
|
done
|
|
mkdir -p /var/log/kata
|
|
fi
|
|
|
|
if [ "$1" = 'dockerd' ] || [ "${1#-}" != "$1" ]; then
|
|
# if the first argument is "dockerd" or a flag (starts with -)
|
|
if [ "${1#-}" != "$1" ]; then
|
|
set -- dockerd "$@"
|
|
fi
|
|
|
|
# Explicitly use iptables-legacy if available, as it is often more stable for DinD
|
|
if command -v update-alternatives >/dev/null; then
|
|
if update-alternatives --query iptables | grep -q "iptables-legacy"; then
|
|
update-alternatives --set iptables /usr/sbin/iptables-legacy || true
|
|
update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy || true
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
exec "$@"
|