fi
done
+LOCALSTATEDIR="@LOCALSTATEDIR@"
+LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@"
+LXC_HOOK_DIR="@LXCHOOKDIR@"
+
# Some useful functions
cleanup() {
- if [ -d "$DOWNLOAD_TEMP" ]; then
- rm -Rf $DOWNLOAD_TEMP
+ if [ -d "${DOWNLOAD_TEMP}" ]; then
+ rm -Rf "${DOWNLOAD_TEMP}"
+ fi
+ if [ -d "${LXC_ROOTFS}.tmp" ]; then
+ rm -Rf "${LXC_ROOTFS}.tmp"
fi
}
basedir="$1"
q="$2"
- digest=`cat "${basedir}/index.json" | jq --arg q "$q" '.manifests[] | if .annotations."org.opencontainers.image.ref.name" == $q then .digest else null end' | sed -e 's/"//g'`
+ digest=`cat "${basedir}/index.json" | jq -c -r --arg q "$q" '.manifests[] | if .annotations."org.opencontainers.image.ref.name" == $q then .digest else empty end'`
if [ -z "${digest}" ]; then
echo "$q not found in index.json" >&2
return
# Ok we have the image config digest, now get the config from that,
d=${digest:7}
- cdigest=`cat "${basedir}/blobs/sha256/${d}" | jq '.config.digest' | sed -e 's/"//g'`
+ cdigest=`cat "${basedir}/blobs/sha256/${d}" | jq -c -r '.config.digest'`
if [ -z "${cdigest}" ]; then
echo "container config not found" >&2
return
configpath="$1"
- ep=`cat "${configpath}" | jq -c '.config.Entrypoint' | sed -e 's/^\[//; s/\]$//; s/","/" "/'`
- cmd=`cat "${configpath}" | jq -c '.config.Cmd' | sed -e 's/^\[//; s/\]$//; s/","/" "/'`
- if [ "${ep}" = "null" ]; then
+ ep=`cat "${configpath}" | jq -c -r '.config.Entrypoint[]?'`
+ cmd=`cat "${configpath}" | jq -c -r '.config.Cmd[]?'`
+ if [ -z "${ep}" ]; then
ep="${cmd}"
- if [ "${ep}" = "null" ]; then
+ if [ -z "${ep}" ]; then
ep="/bin/sh"
fi
- elif [ "${cmd}" != "null" ]; then
+ elif [ -n "${cmd}" ]; then
ep="${ep} ${cmd}"
fi
- if [ -z "${ep}" ]; then
- echo "/bin/sh"
+ echo ${ep}
+ return
+}
+
+# get environment from oci image.
+getenv() {
+ if [ "$#" -eq 0 ]; then
return
fi
- echo "${ep}"
+
+ configpath="$1"
+
+ env=`cat "${configpath}" | jq -c -r '.config.Env[]'`
+
+ echo "${env}"
+ return
+}
+
+# FIXME 1: only support numerical values in the configuration file.
+# FIXME 2: from the OCI image spec: "If group/gid is not specified,
+# the default group and supplementary groups of the given user/uid in
+# /etc/passwd from the container are applied."
+getuidgid() {
+ if [ "$#" -eq 0 ]; then
+ echo "0 0"
+ return
+ fi
+
+ configpath="$1"
+
+ uidgid=`cat "${configpath}" | jq -c -r '.config.User // "0:0"'`
+ uidgid=(${uidgid//:/ })
+
+ printf '%d %d' ${uidgid[0]:-0} ${uidgid[1]:-0} 2>/dev/null || true
+ return
+}
+
+# get cwd from oci image.
+getcwd() {
+ if [ "$#" -eq 0 ]; then
+ echo "/"
+ return
+ fi
+
+ configpath="$1"
+
+ cwd=`cat "${configpath}" | jq -c -r '.config.WorkingDir // "/"'`
+
+ echo "${cwd}"
return
}
Required arguments:
[ -u | --url <url> ]: The OCI image URL
+Optional arguments:
+[ --username <username> ]: The username for the registry
+[ --password <password> ]: The password for the registry
+
LXC internal arguments (do not pass manually!):
[ --name <name> ]: The container name
[ --path <path> ]: The path to the container
return 0
}
-options=$(getopt -o u:h -l help,url:,name:,path:,\
-rootfs:,mapped-uid:,mapped-gid: -- "$@")
+options=$(getopt -o u:h -l help,url:,username:,password:,no-cache,dhcp,\
+name:,path:,rootfs:,mapped-uid:,mapped-gid: -- "$@")
if [ $? -ne 0 ]; then
usage
eval set -- "$options"
OCI_URL=""
+OCI_USERNAME=
+OCI_PASSWORD=
+OCI_USE_CACHE="true"
+OCI_USE_DHCP="false"
+
LXC_MAPPED_GID=
LXC_MAPPED_UID=
LXC_NAME=
case "$1" in
-h|--help) usage && exit 1;;
-u|--url) OCI_URL=$2; shift 2;;
+ --username) OCI_USERNAME=$2; shift 2;;
+ --password) OCI_PASSWORD=$2; shift 2;;
+ --no-cache) OCI_USE_CACHE="false"; shift 1;;
+ --dhcp) OCI_USE_DHCP="true"; shift 1;;
--name) LXC_NAME=$2; shift 2;;
--path) LXC_PATH=$2; shift 2;;
--rootfs) LXC_ROOTFS=$2; shift 2;;
exit 1
fi
+if [ -n "$OCI_PASSWORD" ] && [ -z "$OCI_USERNAME" ]; then
+ echo "ERROR: password given but no username specified"
+ exit 1
+fi
+
+if [ "${OCI_USE_CACHE}" = "true" ]; then
+ if ! skopeo copy --help | grep -q 'dest-shared-blob-dir'; then
+ echo "INFO: skopeo doesn't support blob caching"
+ OCI_USE_CACHE="false"
+ fi
+fi
+
USERNS=$(in_userns)
-if [ "$USERNS" != "no" ]; then
+if [ "$USERNS" = "yes" ]; then
+ if [ -z "$LXC_MAPPED_UID" ] || [ "$LXC_MAPPED_UID" = "-1" ]; then
+ echo "ERROR: In a user namespace without a map." 1>&2
+ exit 1
+ fi
+fi
+
+if [ "${OCI_USE_CACHE}" = "true" ]; then
if [ "$USERNS" = "yes" ]; then
- if [ -z "$LXC_MAPPED_UID" ] || [ "$LXC_MAPPED_UID" = "-1" ]; then
- echo "ERROR: In a user namespace without a map." 1>&2
- exit 1
- fi
- DOWNLOAD_MODE="user"
- DOWNLOAD_TARGET="user"
+ DOWNLOAD_BASE="${HOME}/.cache/lxc"
else
- DOWNLOAD_MODE="user"
- DOWNLOAD_TARGET="system"
+ DOWNLOAD_BASE="${LOCALSTATEDIR}/cache/lxc"
fi
+else
+ DOWNLOAD_BASE=/tmp
fi
# Trap all exit signals
trap cleanup EXIT HUP INT TERM
if ! type mktemp >/dev/null 2>&1; then
- DOWNLOAD_TEMP=/tmp/lxc-oci.$$
+ DOWNLOAD_TEMP="${DOWNLOAD_BASE}/lxc-oci.$$"
mkdir -p $DOWNLOAD_TEMP
else
- DOWNLOAD_TEMP=$(mktemp -d)
+ DOWNLOAD_TEMP=$(mktemp -d -p "${DOWNLOAD_BASE}")
fi
-# Download the image - TODO - cache
-skopeo copy "${OCI_URL}" "oci:${DOWNLOAD_TEMP}:latest"
+# Download the image
+skopeo_args=("")
+if [ -n "$OCI_USERNAME" ]; then
+ CREDENTIALS="${OCI_USERNAME}"
+ if [ -n "$OCI_PASSWORD" ]; then
+ CREDENTIALS="${CREDENTIALS}:${OCI_PASSWORD}"
+ fi
+ skopeo_args+=(--src-creds "${CREDENTIALS}")
+fi
+if [ "${OCI_USE_CACHE}" = "true" ]; then
+ skopeo_args+=(--dest-shared-blob-dir "${DOWNLOAD_BASE}")
+ skopeo copy ${skopeo_args[@]} "${OCI_URL}" "oci:${DOWNLOAD_TEMP}:latest"
+ ln -s "${DOWNLOAD_BASE}/sha256" "${DOWNLOAD_TEMP}/blobs/sha256"
+else
+ skopeo copy ${skopeo_args[@]} "${OCI_URL}" "oci:${DOWNLOAD_TEMP}:latest"
+fi
-# Unpack the rootfs
echo "Unpacking the rootfs"
-
umoci_args=("")
if [ -n "$LXC_MAPPED_UID" ] && [ "$LXC_MAPPED_UID" != "-1" ]; then
umoci_args+=(--rootless)
umoci unpack ${umoci_args[@]} --image "${DOWNLOAD_TEMP}:latest" "${LXC_ROOTFS}.tmp"
rmdir "${LXC_ROOTFS}"
mv "${LXC_ROOTFS}.tmp/rootfs" "${LXC_ROOTFS}"
-rm -rf "${LXC_ROOTFS}.tmp"
OCI_CONF_FILE=$(getconfigpath ${DOWNLOAD_TEMP} latest)
LXC_CONF_FILE="${LXC_PATH}/config"
echo "lxc.execute.cmd = '${entrypoint}'" >> "${LXC_CONF_FILE}"
echo "lxc.mount.auto = proc:mixed sys:mixed cgroup:mixed" >> "${LXC_CONF_FILE}"
+environment=$(getenv ${OCI_CONF_FILE})
+while read -r line; do
+ echo "lxc.environment = ${line}" >> "${LXC_CONF_FILE}"
+done <<< "${environment}"
+
+if [ -e "${LXC_TEMPLATE_CONFIG}/common.conf" ]; then
+ echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/common.conf" >> "${LXC_CONF_FILE}"
+fi
+
+if [ -n "$LXC_MAPPED_UID" ] && [ "$LXC_MAPPED_UID" != "-1" ] && [ -e "${LXC_TEMPLATE_CONFIG}/userns.conf" ]; then
+ echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/userns.conf" >> "${LXC_CONF_FILE}"
+fi
+
+if [ -e "${LXC_TEMPLATE_CONFIG}/oci.common.conf" ]; then
+ echo "lxc.include = ${LXC_TEMPLATE_CONFIG}/oci.common.conf" >> "${LXC_CONF_FILE}"
+fi
+
+if [ "${OCI_USE_DHCP}" = "true" ]; then
+ echo "lxc.hook.start-host = ${LXC_HOOK_DIR}/dhclient" >> "${LXC_CONF_FILE}"
+ echo "lxc.hook.stop = ${LXC_HOOK_DIR}/dhclient" >> "${LXC_CONF_FILE}"
+fi
+
echo "lxc.uts.name = ${LXC_NAME}" >> "${LXC_CONF_FILE}"
# set the hostname
cat <<EOF > ${LXC_ROOTFS}/etc/hostname
cat <<EOF > ${LXC_ROOTFS}/etc/hosts
127.0.0.1 localhost
127.0.1.1 ${LXC_NAME}
+::1 localhost ip6-localhost ip6-loopback
+fe00::0 ip6-localnet
+ff00::0 ip6-mcastprefix
+ff02::1 ip6-allnodes
+ff02::2 ip6-allrouters
EOF
+uidgid=($(getuidgid ${OCI_CONF_FILE}))
+echo "lxc.init.uid = ${uidgid[0]}" >> "${LXC_CONF_FILE}"
+echo "lxc.init.gid = ${uidgid[1]}" >> "${LXC_CONF_FILE}"
+
+cwd=$(getcwd ${OCI_CONF_FILE})
+echo "lxc.init.cwd = ${cwd}" >> "${LXC_CONF_FILE}"
+
if [ -n "$LXC_MAPPED_UID" ] && [ "$LXC_MAPPED_UID" != "-1" ]; then
chown $LXC_MAPPED_UID $LXC_PATH/config $LXC_PATH/fstab >/dev/null 2>&1 || true
fi
projects / mirror_lxc.git / blobdiff