Deleting a template with prune_images, deleting an image, or pruning
orphan images only checked template references — a project node still
pointing at the image (e.g. via hda_disk_image_backing_file) was left
with a dangling reference and the project could no longer be opened.
- Add controller helpers scanning every known project (opened projects
via in-memory nodes, closed projects via their .gns3 file) for
template and image usage; unreadable topologies are skipped
- Guard DELETE /templates/{id}, DELETE /templates/{id}?prune_images,
DELETE /images/{path} and /images/prune with a 409 listing the
project names
- Run all template-delete checks before any mutation so a refused
deletion cannot leave the template gone while its images survive
Appliance fields that describe the appliance (vendor information, default
credentials, installation instructions...) were dropped when installing a
template. Keep them in a new appliance_metadata JSON column on the
templates table, filled by the appliance-to-template conversion for both
registry v1-6 and v8 (version level values override the appliance level
ones). The nested schema allows extra fields so future registry fields
persist without a migration.
- install: resolve the image directory from the version's settings type and
skip image handling for docker appliances; guard appliance.images
- appliance schema: validate template_properties against template_type,
align cpu_throttling with the qemu template, add kvm and version idlepc
- conversion: map IOU image to path, kvm disable to accel=tcg, inherit only
same-type default settings, symbol fallback from the effective category,
template_properties cannot override structural fields
- allow clearing netmiko_device_type with an empty string
- download the template symbol regardless of the level it is defined at and
give qemu guests a default symbol
Common template field (schema + templates table column + Alembic
migration) holding the Netmiko device type (e.g. 'cisco_xr', 'nokia_srl')
so Netmiko/Nornir based tooling can look up how to reach a node's CLI
without hard-coded vendor mappings. Free-form lowercase string on
purpose: Netmiko's platform list evolves independently of GNS3.
