/etc/ is in glance-api 2:16.0.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/etc/glance/
/etc/glance/glance-api-paste.ini
/etc/glance/glance-api.conf
/etc/glance/glance-cache.conf
/etc/glance/glance-scrubber.conf
/etc/glance/metadefs/
/etc/glance/metadefs/README
/etc/glance/metadefs/cim-processor-allocation-setting-data.json
/etc/glance/metadefs/cim-resource-allocation-setting-data.json
/etc/glance/metadefs/cim-storage-allocation-setting-data.json
/etc/glance/metadefs/cim-virtual-system-setting-data.json
/etc/glance/metadefs/compute-aggr-disk-filter.json
/etc/glance/metadefs/compute-aggr-iops-filter.json
/etc/glance/metadefs/compute-aggr-num-instances.json
/etc/glance/metadefs/compute-cpu-pinning.json
/etc/glance/metadefs/compute-guest-memory-backing.json
/etc/glance/metadefs/compute-guest-shutdown.json
/etc/glance/metadefs/compute-host-capabilities.json
/etc/glance/metadefs/compute-hypervisor.json
/etc/glance/metadefs/compute-instance-data.json
/etc/glance/metadefs/compute-libvirt-image.json
/etc/glance/metadefs/compute-libvirt.json
/etc/glance/metadefs/compute-quota.json
/etc/glance/metadefs/compute-randomgen.json
/etc/glance/metadefs/compute-trust.json
/etc/glance/metadefs/compute-vcputopology.json
/etc/glance/metadefs/compute-vmware-flavor.json
/etc/glance/metadefs/compute-vmware-quota-flavor.json
/etc/glance/metadefs/compute-vmware.json
/etc/glance/metadefs/compute-watchdog.json
/etc/glance/metadefs/compute-xenapi.json
/etc/glance/metadefs/glance-common-image-props.json
/etc/glance/metadefs/image-signature-verification.json
/etc/glance/metadefs/operating-system.json
/etc/glance/metadefs/software-databases.json
/etc/glance/metadefs/software-runtimes.json
/etc/glance/metadefs/software-webservers.json
/etc/glance/metadefs/storage-volume-type.json
/etc/glance/policy.json
/etc/glance/schema-image.json
/etc/init/
/etc/init/glance-api.conf
/etc/init.d/
/etc/init.d/glance-api