Failure to import GPG keys

[antifob]

Hi,

Since #192 , our GitLab CI is failing to build images. strace-ing distrobuilder, the keys are correctly fetched, but they are not being picked up. This step fails for Ubuntu-based images as well as Alpine-based ones.

Steps

Create a repository on GitLab (gitlab.com suffices), put an image template of your choice and the following .gitlab-ci.yml file in it. Commit, push and start the CI.

# .gitlab-ci.yml
image: ubuntu:18.04

before_script:
    - apt-get update
    - apt-get -y install git-core golang-go debootstrap rsync gpg squashfs-tools
    - 'go get -d -v github.com/lxc/distrobuilder || :'
    - cd ~/go/src/github.com/lxc/distrobuilder
    - make
    - cd "${CI_PROJECT_DIR}"

image:
    stage: build
    script:
        - ~/go/bin/distrobuilder build-lxd image-of-your-choice.yml

Output

Here are relevant trace output lines for an Alpine-based image:

• [pid 6739] <... read resumed> "gpg: key 293ACD0907D9495A: 2 duplicate signatures removed\ngpg: key 293ACD0907D9495A: 11 signatures not checked due to missing keys\ngpg: /tmp/distrobuilder.071160561/trustdb.gpg: trustdb created\ngpg: key 293ACD0907D9495A: public key \"Natanael Copa <ncopa@alpinelinux.org>\" imported\n", 1473) = 281
• [pid 6743] read(9, "gpg: key 293ACD0907D9495A: 2 duplicate signatures removed\ngpg: key 293ACD0907D9495A: 11 signatures not checked due to missing keys\ngpg: key 293ACD0907D9495A: \"Natanael Copa <ncopa@alpinelinux.org>\" not changed\ngpg: Total number processed: 1\ngpg: unchanged: 1\n", 512) = 272
• [pid 6750] write(2, "Error: Error while downloading source: Failed to import keys: 0482D84022F52DF1C4E7CD43293ACD0907D9495A\n", 103Error: Error while downloading source: Failed to import keys: 0482D84022F52DF1C4E7CD43293ACD0907D9495A ) = 103

This matches an execution where the key is correctly fetched and ignored two (2) times.