Import Vulnerability Data to an Offline Harbor instance

Clair is being removed as a default vulnerability scanner in Harbor v2.2. Its highly recommended that you configure Trivy as your default scanner instead. If you want to continue using Clair, you should configure it as an external scanner.

If Harbor is installed in an environment without an internet connection, Clair cannot fetch data from the public vulnerability database. In this case, the Harbor administrator must update the Clair database manually.


  • You have an instance of Clair that has an internet connection. If you have another instance of Harbor that has internet access, this also works.

  • Check whether your Clair instance has already updated its vulnerability database to the latest version.

    1. Use docker ps to find out the container ID of the Clair service.
    2. Run docker logs <container_id> to check the log of the Clair container. If you are using Harbor you can find the latest Clair logs under /var/log/harbor/2017-xx-xx/clair.log.
    3. Look for logs that look like the following:
    Jul 3 20:40:45 clair[3516]: {"Event":"finished fetching","Level":"info","Location":"updater.go:227","Time":"2017-07-04 03:40:45.890364","updater name":"rhel"}
    Jul 3 20:40:46 clair[3516]: {"Event":"finished fetching","Level":"info","Location":"updater.go:227","Time":"2017-07-04 03:40:46.768924","updater name":"alpine"}
    Jul 3 20:40:47 clair[3516]: {"Event":"finished fetching","Level":"info","Location":"updater.go:227","Time":"2017-07-04 03:40:47.190982","updater name":"oracle"}
    Jul 3 20:41:07 clair[3516]: {"Event":"Debian buster is not mapped to any version number (eg. Jessie-\u003e8). Please update me.","Level":"warning","Location":"debian.go:128","Time":"2017-07-04 03:41:07.833720"}
    Jul 3 20:41:07 clair[3516]: {"Event":"finished fetching","Level":"info","Location":"updater.go:227","Time":"2017-07-04 03:41:07.833975","updater name":"debian"}
    Jul 4 00:26:17 clair[3516]: {"Event":"finished fetching","Level":"info","Location":"updater.go:227","Time":"2017-07-04 07:26:17.596986","updater name":"ubuntu"}
    Jul 4 00:26:18 clair[3516]: {"Event":"adding metadata to vulnerabilities","Level":"info","Location":"updater.go:253","Time":"2017-07-04 07:26:18.060810"}
    Jul 4 00:38:05 clair[3516]: {"Event":"update finished","Level":"info","Location":"updater.go:198","Time":"2017-07-04 07:38:05.251580"}

The phrase finished fetching indicates that Clair has finished a round of vulnerability updates from an endpoint. Make sure all of the rhel, alpine, oracle, debian, and ubuntu endpoints are updated correctly. If they have not, wait for Clair to get the data.

Dump Vulnerability Data

  1. Log in to the host, that is connected to Internet, on which the Postgres Clair database is running.

  2. Dump Clair’s vulnerability database by running the following commands.

    The container name clair-db is a placeholder for the database container used by the internet-connected instance of Clair.
    $ docker exec clair-db /bin/sh -c  "pg_dump -U postgres -a -t feature -t keyvalue -t namespace -t schema_migrations -t vulnerability -t vulnerability_fixedin_feature" > vulnerability.sql  
    $ docker exec clair-db /bin/sh -c "pg_dump -U postgres -c -s" > clear.sql

The files vulnerability.sql and clear.sql are generated.

Back Up the Harbor Clair Database

Before importing the data, it is strongly recommended to back up the Clair database in Harbor.

docker exec harbor-db /bin/sh -c  "pg_dump -U postgres -c" > all.sql

Update the Harbor Clair Database

  1. Copy the vulnerability.sql and clear.sql files to the host on which Harbor is running.

  2. Run the following commands to import the data to the Harbor Clair database:

    docker exec -i harbor-db psql -U postgres < clear.sql  
    docker exec -i harbor-db psql -U postgres < vulnerability.sql

Rescan the Images

After importing the data, trigger the scanning process in the Harbor interface. For information about running a scan, see Scan All Artifacts.