521 lines
19 KiB
Bash
521 lines
19 KiB
Bash
#!/usr/bin/env bats
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load helpers
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@test "already-in-userns" {
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if test "$BUILDAH_ISOLATION" != "rootless" -o $UID == 0 ; then
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skip "BUILDAH_ISOLATION = $BUILDAH_ISOLATION"
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fi
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_prefetch alpine
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run_buildah from $WITH_POLICY_JSON --quiet alpine
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expect_output "alpine-working-container"
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ctr="$output"
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run_buildah unshare buildah run --isolation=oci "$ctr" echo hello
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expect_output "hello"
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}
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@test "user-and-network-namespace" {
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skip_if_rootless_environment
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skip_if_chroot
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skip_if_rootless
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mkdir -p $TEST_SCRATCH_DIR/no-cni-configs
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RUNOPTS="--cni-config-dir=${TEST_SCRATCH_DIR}/no-cni-configs ${RUNC_BINARY:+--runtime $RUNC_BINARY}"
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# Check if we're running in an environment that can even test this.
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run readlink /proc/self/ns/user
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echo "readlink /proc/self/ns/user -> $output"
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[ $status -eq 0 ] || skip "user namespaces not supported"
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run readlink /proc/self/ns/net
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echo "readlink /proc/self/ns/net -> $output"
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[ $status -eq 0 ] || skip "network namespaces not supported"
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mynetns="$output"
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# Generate the mappings to use for using-a-user-namespace cases.
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uidbase=$((${RANDOM}+1024))
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gidbase=$((${RANDOM}+1024))
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uidsize=$((${RANDOM}+1024))
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gidsize=$((${RANDOM}+1024))
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# Create a container that uses that mapping.
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_prefetch alpine
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run_buildah from $WITH_POLICY_JSON --quiet --userns-uid-map 0:$uidbase:$uidsize --userns-gid-map 0:$gidbase:$gidsize alpine
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ctr="$output"
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# Check that with settings that require a user namespace, we also get a new network namespace by default.
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run_buildah run $RUNOPTS "$ctr" readlink /proc/self/ns/net
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assert "$output" != "$mynetns" "we should get a new network namespace"
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# Check that with settings that require a user namespace, we can still try to use the host's network namespace.
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run_buildah run $RUNOPTS --net=host "$ctr" readlink /proc/self/ns/net
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expect_output "$mynetns"
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# Check that we are not bind mounting /sys from the host with --net=container
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host_sys=$(grep "/sys " /proc/self/mountinfo | cut -d ' ' -f 3)
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run_buildah run $RUNOPTS --net=container "$ctr" sh -c 'grep "/sys " /proc/self/mountinfo | cut -d " " -f 3'
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assert "$output" != "$host_sys"
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# Create a container that doesn't use that mapping.
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run_buildah from $WITH_POLICY_JSON --quiet alpine
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ctr="$output"
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run_buildah run $RUNOPTS --net=host "$ctr" readlink /proc/self/ns/net
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expect_output "$mynetns"
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# Check that with settings that don't require a user namespace, we can request to use a per-container network namespace.
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run_buildah run $RUNOPTS --net=container "$ctr" readlink /proc/self/ns/net
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assert "$output" != "$mynetns" \
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"[/proc/self/ns/net (--net=container) should not be '$mynetns']"
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run_buildah run $RUNOPTS --net=private "$ctr" readlink /proc/self/ns/net
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assert "$output" != "$mynetns" \
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"[/proc/self/ns/net (--net=private) should not be '$mynetns']"
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run_buildah run $RUNOPTS "$ctr" readlink /proc/self/ns/net
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assert "$output" != "$mynetns" \
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"[/proc/self/ns/net (--net="") should not be '$mynetns']"
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}
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# Helper for idmapping test: check UID or GID mapping
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# NOTE SIDE EFFECT: sets $rootxid for possible use by caller
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idmapping_check_map() {
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local _output_idmap=$1
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local _expect_idmap=$2
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local _testname=$3
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[ -n "$_output_idmap" ]
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local _idmap=$(sed -E -e 's, +, ,g' -e 's,^ +,,g' <<< "${_output_idmap}")
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expect_output --from="$_idmap" "${_expect_idmap}" "$_testname"
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# SIDE EFFECT: Global: our caller may want this
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rootxid=$(sed -E -e 's,^([^ ]*) (.*) ([^ ]*),\2,' <<< "$_idmap")
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}
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# Helper for idmapping test: check file permissions
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idmapping_check_permission() {
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local _output_file_stat=$1
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local _output_dir_stat=$2
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expect_output --from="${_output_file_stat}" "1:1" "Check if a copied file gets the right permissions"
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expect_output --from="${_output_dir_stat}" "0:0" "Check if a copied directory gets the right permissions"
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}
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@test "idmapping" {
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skip_if_rootless_environment
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mkdir -p $TEST_SCRATCH_DIR/no-cni-configs
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RUNOPTS="--cni-config-dir=${TEST_SCRATCH_DIR}/no-cni-configs ${RUNC_BINARY:+--runtime $RUNC_BINARY}"
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# Check if we're running in an environment that can even test this.
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run readlink /proc/self/ns/user
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echo "readlink /proc/self/ns/user -> $output"
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[ $status -eq 0 ] || skip "user namespaces not supported"
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mynamespace="$output"
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# Generate the mappings to use.
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uidbase=$((${RANDOM}+1024))
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gidbase=$((${RANDOM}+1024))
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uidsize=$((${RANDOM}+1024))
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gidsize=$((${RANDOM}+1024))
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# Test with no mappings.
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uidmapargs[0]=
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gidmapargs[0]=
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uidmaps[0]="0 0 4294967295"
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gidmaps[0]="0 0 4294967295"
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# Test with both UID and GID maps specified.
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uidmapargs[1]="--userns-uid-map=0:$uidbase:$uidsize"
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gidmapargs[1]="--userns-gid-map=0:$gidbase:$gidsize"
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uidmaps[1]="0 $uidbase $uidsize"
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gidmaps[1]="0 $gidbase $gidsize"
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# Conditionalize some tests on the subuid and subgid files being present.
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if test -s /etc/subuid ; then
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if test -s /etc/subgid ; then
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# Look for a name that's in both the subuid and subgid files.
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for candidate in $(sed -e 's,:.*,,g' /etc/subuid); do
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if test $(sed -e 's,:.*,,g' -e "/$candidate/!d" /etc/subgid) == "$candidate"; then
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# Read the start of the subuid/subgid ranges. Assume length=65536.
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userbase=$(sed -e "/^${candidate}:/!d" -e 's,^[^:]*:,,g' -e 's,:[^:]*,,g' /etc/subuid)
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groupbase=$(sed -e "/^${candidate}:/!d" -e 's,^[^:]*:,,g' -e 's,:[^:]*,,g' /etc/subgid)
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# Test specifying both the user and group names.
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uidmapargs[${#uidmaps[*]}]=--userns-uid-map-user=$candidate
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gidmapargs[${#gidmaps[*]}]=--userns-gid-map-group=$candidate
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uidmaps[${#uidmaps[*]}]="0 $userbase 65536"
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gidmaps[${#gidmaps[*]}]="0 $groupbase 65536"
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# Test specifying just the user name.
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uidmapargs[${#uidmaps[*]}]=--userns-uid-map-user=$candidate
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uidmaps[${#uidmaps[*]}]="0 $userbase 65536"
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gidmaps[${#gidmaps[*]}]="0 $groupbase 65536"
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# Test specifying just the group name.
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gidmapargs[${#gidmaps[*]}]=--userns-gid-map-group=$candidate
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uidmaps[${#uidmaps[*]}]="0 $userbase 65536"
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gidmaps[${#gidmaps[*]}]="0 $groupbase 65536"
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break
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fi
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done
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# Choose different names from the files.
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for candidateuser in $(sed -e 's,:.*,,g' /etc/subuid); do
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for candidategroup in $(sed -e 's,:.*,,g' /etc/subgid); do
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if test "$candidateuser" == "$candidate" ; then
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continue
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fi
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if test "$candidategroup" == "$candidate" ; then
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continue
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fi
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if test "$candidateuser" == "$candidategroup" ; then
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continue
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fi
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# Read the start of the ranges. Assume length=65536.
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userbase=$(sed -e "/^${candidateuser}:/!d" -e 's,^[^:]*:,,g' -e 's,:[^:]*,,g' /etc/subuid)
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groupbase=$(sed -e "/^${candidategroup}:/!d" -e 's,^[^:]*:,,g' -e 's,:[^:]*,,g' /etc/subgid)
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# Test specifying both the user and group names.
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uidmapargs[${#uidmaps[*]}]=--userns-uid-map-user=$candidateuser
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gidmapargs[${#gidmaps[*]}]=--userns-gid-map-group=$candidategroup
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uidmaps[${#uidmaps[*]}]="0 $userbase 65536"
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gidmaps[${#gidmaps[*]}]="0 $groupbase 65536"
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break
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done
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done
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fi
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fi
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touch ${TEST_SCRATCH_DIR}/somefile
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mkdir ${TEST_SCRATCH_DIR}/somedir
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touch ${TEST_SCRATCH_DIR}/somedir/someotherfile
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chmod 700 ${TEST_SCRATCH_DIR}/somedir/someotherfile
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chmod u+s ${TEST_SCRATCH_DIR}/somedir/someotherfile
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for i in $(seq 0 "$((${#uidmaps[*]}-1))") ; do
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# local helper function for checking /proc/self/ns/user
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function idmapping_check_namespace() {
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local _output=$1
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local _testname=$2
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[ "$_output" != "" ]
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if [ -z "${uidmapargs[$i]}${gidmapargs[$i]}" ]; then
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if test "$BUILDAH_ISOLATION" != "chroot" -a "$BUILDAH_ISOLATION" != "rootless" ; then
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expect_output --from="$_output" "$mynamespace" "/proc/self/ns/user ($_testname)"
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fi
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else
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[ "$_output" != "$mynamespace" ]
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fi
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}
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# Create a container using these mappings.
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echo "Building container with $WITH_POLICY_JSON --quiet ${uidmapargs[$i]} ${gidmapargs[$i]} alpine"
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_prefetch alpine
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run_buildah from $WITH_POLICY_JSON --quiet ${uidmapargs[$i]} ${gidmapargs[$i]} alpine
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ctr="$output"
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# If we specified mappings, expect to be in a different namespace by default.
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run_buildah run $RUNOPTS "$ctr" readlink /proc/self/ns/user
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idmapping_check_namespace "$output" "container"
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# Check that we got the UID and GID mappings that we expected.
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# rootuid/rootgid are obtained (side effect) from helper function
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run_buildah run $RUNOPTS "$ctr" cat /proc/self/uid_map
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idmapping_check_map "$output" "${uidmaps[$i]}" "uid_map"
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rootuid=$rootxid
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run_buildah run $RUNOPTS "$ctr" cat /proc/self/gid_map
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idmapping_check_map "$output" "${gidmaps[$i]}" "gid_map"
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rootgid=$rootxid
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# Check that if we copy a file into the container, it gets the right permissions.
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run_buildah copy --chown 1:1 "$ctr" ${TEST_SCRATCH_DIR}/somefile /
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run_buildah run $RUNOPTS "$ctr" stat -c '%u:%g' /somefile
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output_file_stat="$output"
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# Check that if we copy a directory into the container, its contents get the right permissions.
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run_buildah copy "$ctr" ${TEST_SCRATCH_DIR}/somedir /somedir
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run_buildah run $RUNOPTS "$ctr" stat -c '%u:%g' /somedir
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output_dir_stat="$output"
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idmapping_check_permission "$output_file_stat" "$output_dir_stat"
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run_buildah run $RUNOPTS "$ctr" stat -c '%u:%g %a' /somedir/someotherfile
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expect_output "0:0 4700" "stat(someotherfile), in container test"
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# Check that the copied file has the right permissions on host.
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run_buildah mount "$ctr"
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mnt="$output"
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run stat -c '%u:%g %a' "$mnt"/somedir/someotherfile
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[ $status -eq 0 ]
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expect_output "$rootuid:$rootgid 4700"
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# Check that a container with mapped-layer can be committed.
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run_buildah commit "$ctr" localhost/alpine-working:$i
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# Also test bud command
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# Build an image using these mappings.
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echo "Building image with ${uidmapargs[$i]} ${gidmapargs[$i]}"
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run_buildah bud ${uidmapargs[$i]} ${gidmapargs[$i]} $RUNOPTS $WITH_POLICY_JSON \
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-t localhost/alpine-bud:$i -f $BUDFILES/namespaces/Containerfile $TEST_SCRATCH_DIR
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# If we specified mappings, expect to be in a different namespace by default.
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output_namespace="$(grep -A1 'ReadlinkResult' <<< "$output" | tail -n1)"
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idmapping_check_namespace "${output_namespace}" "bud"
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# Check that we got the mappings that we expected.
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output_uidmap="$(grep -A1 'UidMapResult' <<< "$output" | tail -n1)"
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output_gidmap="$(grep -A1 'GidMapResult' <<< "$output" | tail -n1)"
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idmapping_check_map "$output_uidmap" "${uidmaps[$i]}" "UidMapResult"
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idmapping_check_map "$output_gidmap" "${gidmaps[$i]}" "GidMapResult"
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# Check that if we copy a file into the container, it gets the right permissions.
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output_file_stat="$(grep -A1 'StatSomefileResult' <<< "$output" | tail -n1)"
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# Check that if we copy a directory into the container, its contents get the right permissions.
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output_dir_stat="$(grep -A1 'StatSomedirResult' <<< "$output" | tail -n1)"
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output_otherfile_stat="$(grep -A1 'StatSomeotherfileResult' <<< "$output" | tail -n1)"
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output_workdir_stat="$(grep -A1 'StatNewWorkdir' <<< "$output" | tail -n1)"
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# bud strips suid.
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idmapping_check_permission "$output_file_stat" "$output_dir_stat"
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expect_output --from="${output_otherfile_stat}" "0:0 700" "stat(someotherfile), in bud test"
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expect_output --from="${output_workdir_stat}" "guest:users" "stat(new-workdir), in bud test"
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done
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}
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general_namespace() {
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mkdir -p $TEST_SCRATCH_DIR/no-cni-configs
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RUNOPTS="--cni-config-dir=${TEST_SCRATCH_DIR}/no-cni-configs ${RUNC_BINARY:+--runtime $RUNC_BINARY}"
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mytmpdir=$TEST_SCRATCH_DIR/my-dir
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mkdir -p ${mytmpdir}
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# The name of the /proc/self/ns/$link.
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nstype="$1"
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# The flag to use, if it's not the same as the namespace name.
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nsflag="${2:-$1}"
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# Check if we're running in an environment that can even test this.
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run readlink /proc/self/ns/"$nstype"
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echo "readlink /proc/self/ns/$nstype -> $output"
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[ $status -eq 0 ] || skip "$nstype namespaces not supported"
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mynamespace="$output"
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# Settings to test.
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types[0]=
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types[1]=container
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types[2]=host
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types[3]=/proc/$$/ns/$nstype
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types[4]=private
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types[5]=ns:/proc/$$/ns/$nstype
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_prefetch alpine
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for namespace in "${types[@]}" ; do
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# Specify the setting for this namespace for this container.
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run_buildah from $WITH_POLICY_JSON --quiet --"$nsflag"=$namespace alpine
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[ "$output" != "" ]
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ctr="$output"
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# Check that, unless we override it, we get that setting in "run".
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run_buildah run $RUNOPTS "$ctr" readlink /proc/self/ns/"$nstype"
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[ "$output" != "" ]
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case "$namespace" in
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""|container|private)
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[ "$output" != "$mynamespace" ]
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;;
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host)
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expect_output "$mynamespace"
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;;
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/*)
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expect_output "$(readlink $namespace)"
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;;
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esac
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# "run" doesn't have --userns option.
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if [ "$nsflag" != "userns" ]; then
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for different in ${types[@]} ; do
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# Check that, if we override it, we get what we specify for "run".
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run_buildah run $RUNOPTS --"$nsflag"=$different "$ctr" readlink /proc/self/ns/"$nstype"
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[ "$output" != "" ]
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case "$different" in
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""|container|private)
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[ "$output" != "$mynamespace" ]
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;;
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host)
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expect_output "$mynamespace"
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;;
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/*)
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expect_output "$(readlink $different)"
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;;
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esac
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done
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fi
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# Also check "from" command
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cat > $mytmpdir/Containerfile << _EOF
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FROM alpine
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RUN echo "TargetOutput" && readlink /proc/self/ns/$nstype
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_EOF
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run_buildah bud --"$nsflag"=$namespace $RUNOPTS $WITH_POLICY_JSON --file ${mytmpdir}/Containerfile .
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result=$(grep -A1 "TargetOutput" <<< "$output" | tail -n1)
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case "$namespace" in
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""|container|private)
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[ "$result" != "$mynamespace" ]
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;;
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host)
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expect_output --from="$result" "$mynamespace"
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;;
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/*)
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expect_output --from="$result" "$(readlink $namespace)"
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;;
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esac
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done
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}
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@test "ipc-namespace" {
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skip_if_chroot
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skip_if_rootless
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skip_if_rootless_environment
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general_namespace ipc
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}
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@test "net-namespace" {
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skip_if_chroot
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skip_if_rootless
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skip_if_rootless_environment
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general_namespace net
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}
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@test "network-namespace" {
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skip_if_chroot
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skip_if_rootless
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skip_if_rootless_environment
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general_namespace net network
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}
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@test "pid-namespace" {
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skip_if_chroot
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skip_if_rootless
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skip_if_rootless_environment
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general_namespace pid
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}
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@test "user-namespace" {
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skip_if_chroot
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skip_if_rootless
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skip_if_rootless_environment
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general_namespace user userns
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}
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@test "uts-namespace" {
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skip_if_chroot
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skip_if_rootless
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skip_if_rootless_environment
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general_namespace uts
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}
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@test "combination-namespaces" {
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skip_if_chroot
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skip_if_rootless
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_prefetch alpine
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# mnt is always per-container, cgroup isn't a thing OCI runtime lets us configure
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for ipc in host private; do
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for net in host private; do
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for pid in host private; do
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for userns in host private; do
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for uts in host private; do
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for cgroupns in host private; do
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echo "buildah from $WITH_POLICY_JSON --ipc=$ipc --net=$net --pid=$pid --userns=$userns --uts=$uts --cgroupns=$cgroupns alpine"
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run_buildah from $WITH_POLICY_JSON --quiet --ipc=$ipc --net=$net --pid=$pid --userns=$userns --uts=$uts --cgroupns=$cgroupns alpine
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[ "$output" != "" ]
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ctr="$output"
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run_buildah run $ctr pwd
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[ "$output" != "" ]
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|
run_buildah run --tty=true $ctr pwd
|
|
[ "$output" != "" ]
|
|
run_buildah run --terminal=false $ctr pwd
|
|
[ "$output" != "" ]
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
}
|
|
|
|
@test "idmapping-and-squash" {
|
|
skip_if_rootless_environment
|
|
createrandom ${TEST_SCRATCH_DIR}/randomfile
|
|
run_buildah from --userns-uid-map 0:32:16 --userns-gid-map 0:48:16 scratch
|
|
cid=$output
|
|
run_buildah copy "$cid" ${TEST_SCRATCH_DIR}/randomfile /
|
|
run_buildah copy --chown 1:1 "$cid" ${TEST_SCRATCH_DIR}/randomfile /randomfile2
|
|
run_buildah commit --squash $WITH_POLICY_JSON --rm "$cid" squashed
|
|
run_buildah from --quiet squashed
|
|
cid=$output
|
|
run_buildah mount $cid
|
|
mountpoint=$output
|
|
run stat -c %u:%g $mountpoint/randomfile
|
|
[ "$status" -eq 0 ]
|
|
expect_output "0:0"
|
|
|
|
run stat -c %u:%g $mountpoint/randomfile2
|
|
[ "$status" -eq 0 ]
|
|
expect_output "1:1"
|
|
}
|
|
|
|
@test "invalid userns-uid-map userns-gid-map" {
|
|
run_buildah 125 from --userns-uid-map 16 --userns-gid-map 0:48:16 scratch
|
|
expect_output 'Error: initializing ID mappings: userns-uid-map setting is malformed expected ["uint32:uint32:uint32"]: ["16"]'
|
|
|
|
run_buildah 125 from --userns-uid-map 0:32:16 --userns-gid-map 16 scratch
|
|
expect_output 'Error: initializing ID mappings: userns-gid-map setting is malformed expected ["uint32:uint32:uint32"]: ["16"]'
|
|
|
|
run_buildah 125 bud --userns-uid-map a --userns-gid-map bogus bud/from-scratch
|
|
expect_output 'Error: initializing ID mappings: userns-uid-map setting is malformed expected ["uint32:uint32:uint32"]: ["a"]'
|
|
|
|
run_buildah 125 bud --userns-uid-map 0:32:16 --userns-gid-map bogus bud/from-scratch
|
|
expect_output 'Error: initializing ID mappings: userns-gid-map setting is malformed expected ["uint32:uint32:uint32"]: ["bogus"]'
|
|
|
|
run_buildah from --userns-uid-map 0:32:16 scratch
|
|
}
|
|
|
|
@test "idmapping-syntax" {
|
|
run_buildah from $WITH_POLICY_JSON --quiet --userns-uid-map=0:10000:65536 alpine
|
|
|
|
run_buildah 125 from $WITH_POLICY_JSON --quiet --userns-gid-map=0:10000:65536 alpine
|
|
expect_output --substring "userns-gid-map can not be used without --userns-uid-map"
|
|
}
|
|
|
|
@test "use containers.conf namespace settings" {
|
|
skip_if_chroot
|
|
|
|
_prefetch alpine
|
|
containers_conf_file="$TEST_SCRATCH_DIR/containers-namespaces.conf"
|
|
|
|
for mode in host private; do
|
|
cat > "$containers_conf_file" << EOF
|
|
[containers]
|
|
|
|
cgroupns = "$mode"
|
|
netns = "$mode"
|
|
pidns = "$mode"
|
|
ipcns = "$mode"
|
|
utsns = "$mode"
|
|
EOF
|
|
|
|
CONTAINERS_CONF="$containers_conf_file" run_buildah from $WITH_POLICY_JSON --quiet alpine
|
|
[ "$output" != "" ]
|
|
ctr="$output"
|
|
|
|
local op="=="
|
|
if [[ "$mode" == "private" ]]; then
|
|
op="!="
|
|
fi
|
|
|
|
for nstype in cgroup ipc net pid uts; do
|
|
run readlink /proc/self/ns/"$nstype"
|
|
ns="$output"
|
|
run_buildah run $ctr readlink /proc/self/ns/"$nstype"
|
|
assert "$output" $op "$ns" "namespace matches expected ($mode)"
|
|
done
|
|
done
|
|
|
|
rm "$containers_conf_file"
|
|
}
|