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| -rw-r--r-- | .travis.yml | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/.travis.yml b/.travis.yml index 6b20abe8..b7a56f38 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,6 +1,22 @@ language: python dist: bionic +# We use two different caching strategies. The default is to cache pip +# packages (as most of our jobs use pip packages), which is configured here. +# For the integration tests, we instead want to cache the lxd images. The +# directory in which the images are stored (/var/snap/lxd/common/lxd/images/) +# is not readable/writeable by the default user (which is a requirement for +# caching), so we instead cache the `lxd_images/` directory. We move lxd +# images out of there before we run tests and back in once tests are complete. +# We _move_ the images out and only copy the most recent lxd image back into +# the cache, to avoid our cache growing without bound. (We only need the most +# recent lxd image because the integration tests only use a single image.) +# +# We cache the lxd images because this saves a few seconds in the general +# case, but provides substantial speed-ups when cloud-images.ubuntu.com, the +# source of the images, is under heavy load. +cache: pip + install: # Required so `git describe` will definitely find a tag; see # https://github.com/travis-ci/travis-ci/issues/7422 @@ -18,6 +34,17 @@ matrix: TOXENV=py3 PYTEST_ADDOPTS=-v # List all tests run by pytest - if: NOT branch =~ /^ubuntu\// + cache: + - directories: + - lxd_images + before_cache: + - | + # Find the most recent image file + latest_file="$(sudo ls -Art /var/snap/lxd/common/lxd/images/ | tail -n 1)" + # This might be <hash>.rootfs or <hash>, normalise + latest_file="$(basename $latest_file .rootfs)" + # Find all files with that prefix and copy them to our cache dir + sudo find /var/snap/lxd/common/lxd/images/ -name $latest_file* -print -exec cp {} lxd_images/ \; install: - git fetch --unshallow - sudo apt-get build-dep -y cloud-init @@ -33,6 +60,8 @@ matrix: - sudo snap install lxd - sudo lxd init --auto - sudo mkdir --mode=1777 -p /var/snap/lxd/common/consoles + # Move any cached lxd images into lxd's image dir + - sudo find lxd_images/ -type f -print -exec mv {} /var/snap/lxd/common/lxd/images/ \; - sudo usermod -a -G lxd $USER - sudo sbuild-adduser $USER - cp /usr/share/doc/sbuild/examples/example.sbuildrc /home/$USER/.sbuildrc |