mirror of
https://github.com/token2/snapd.git
synced 2026-03-13 11:15:47 -07:00
88b8579b04
The pressed-* tests are flaky (see LP: 1949513). To get more insights, add more debug to see why the device does not show up.
98 lines
3.9 KiB
Bash
98 lines
3.9 KiB
Bash
#!/bin/bash
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# mount ubuntu cloud image through qemu-nbd and mount
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# critical virtual filesystems (such as proc) under
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# the root of mounted image.
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# The path of the image needs to be absolute as a systemd service
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# gets created for qemu-nbd.
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mount_ubuntu_image() {
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local CLOUD_IMAGE=$1
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local IMAGE_MOUNTPOINT=$2
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if ! lsmod | grep nbd; then
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modprobe nbd
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fi
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# Run qemu-nbd as a service, so that it does not interact with ssh
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# stdin/stdout it would otherwise inherit from the spread session.
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systemd-run --system --service-type=forking --unit=qemu-nbd-preseed.service "$(command -v qemu-nbd)" -v --fork -c /dev/nbd0 "$CLOUD_IMAGE"
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# nbd0p1 may take a short while to become available
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if ! retry -n 30 --wait 1 test -e /dev/nbd0p1; then
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echo "ERROR: /dev/nbd0p1 did not show up"
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journalctl -u qemu-nbd-preseed.service
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find /dev/ -name "nbd0*" -ls
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exit 1
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fi
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mount /dev/nbd0p1 "$IMAGE_MOUNTPOINT"
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mount -t proc /proc "$IMAGE_MOUNTPOINT/proc"
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mount -t sysfs sysfs "$IMAGE_MOUNTPOINT/sys"
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mount -t devtmpfs udev "$IMAGE_MOUNTPOINT/dev"
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mount -t securityfs securityfs "$IMAGE_MOUNTPOINT/sys/kernel/security"
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}
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umount_ubuntu_image() {
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local IMAGE_MOUNTPOINT=$1
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for fs in proc dev sys/kernel/security sys; do
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umount "$IMAGE_MOUNTPOINT/$fs"
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done
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umount "$IMAGE_MOUNTPOINT"
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rmdir "$IMAGE_MOUNTPOINT"
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# qemu-nbd -d may sporadically fail when removing the device,
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# reporting it's still in use.
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retry -n 5 --wait 1 qemu-nbd -d /dev/nbd0
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}
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# inject_snap_info_seed adds a snap to the seed.yaml, and works for snaps not
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# already in the seed. It requires base snaps, default-providers, etc. to all be
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# worked out and manually added with additional invocations
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# the first argument is the mountpoint of the image, the second argument is the
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# name of the snap, the snap file must be the same as the name with .snap as the
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# file extension in the current working directory
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# example:
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# $ snap download --edge --basename=test-snapd-sh test-snapd-sh
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# $ inject_snap_into_seeds "$IMAGE_MOUNTPOINT" test-snapd-sh
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inject_snap_into_seed() {
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local IMAGE_MOUNTPOINT=$1
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local SNAP_NAME=$2
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local SNAP_FILE="$SNAP_NAME.snap"
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local SEED_YAML="$IMAGE_MOUNTPOINT/var/lib/snapd/seed/seed.yaml"
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local SEED_SNAPS_DIR="$IMAGE_MOUNTPOINT/var/lib/snapd/seed/snaps"
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# need remarshal for going from json to yaml and back for seed manipulation
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if ! command -v json2yaml || ! command -v yaml2json; then
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snap install remarshal
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fi
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# XXX: this is very simplistic and will break easily, refactor to use the
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# iterative seed modification prepare-image args when those exist
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snapsWithName=$(yaml2json < "$SEED_YAML" | jq -r --arg NAME "$SNAP_NAME" '[.snaps[] | select(.name == $NAME)] | length')
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if [ "$snapsWithName" != "0" ]; then
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# get the snap file name so we can delete it from the seed
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old_name=$(yaml2json < "$SEED_YAML" | \
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jq -r --arg NAME "$SNAP_NAME" '.snaps[] | select(.name == $NAME) | .file')
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rm "$SEED_SNAPS_DIR/$old_name"
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# now drop the entry from the seed.yaml so we can add the new one easily
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yaml2json < "$SEED_YAML" | \
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jq --arg NAME "$SNAP_NAME" 'del(.snaps[] | select(.name == $NAME))' | \
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json2yaml > "$SEED_YAML.tmp"
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mv "$SEED_YAML.tmp" "$SEED_YAML"
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fi
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# now add the desired snap as an unasserted snap with some jq magic™
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yaml2json < "$SEED_YAML"| \
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jq --arg FILE "$SNAP_FILE" --arg NAME "$SNAP_NAME" \
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'.snaps[.snaps| length] |= . + {"channel":"stable","unasserted":true,"name":$NAME,"file":$FILE}' | \
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json2yaml > "$SEED_YAML.tmp"
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mv "$SEED_YAML.tmp" "$SEED_YAML"
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# and remember to copy the new snap file to the seed
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cp "$SNAP_FILE" "$SEED_SNAPS_DIR"
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# check that we didn't break things too badly
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snap debug validate-seed "$SEED_YAML"
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}
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