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fix(docs-infra): better detect failed attempts to update the preview server Docker container (#37015) 

In order to avoid unnecessary operations, the `update-preview-server.sh`
script, that is used to update the PR preview server Docker container,
will only try to update the Docker container if either any files in the
`aio/aio-builds-setup/` directory have changed since the last update or
if a previous update failed. A failed previous update is detected by
checking whether the temporary `aio-builds:provisional` Docker image
still exists. This temporary image is created during the update
operation and is renamed to `aio-builds:latest` if the update goes well.

Previously, the update script was not able to detect a previous failed
attempt if the operation failed before creating the
`aio-builds:provisional` Docker image, such as if the `create-image.sh`
script failed. This could lead to a situation where the preview server
Docker container would not be updated after a failed attempt.

This commit improves the logic for detecting failed attempts to account
for this type of failures. It does this by not removing an older
`aio-builds:provisional` Docker image until a new one is successfully
created.

NOTE: While this is not full-proof, it is an improvement as it
      eliminates a certain kind of failures.

PR Close #37015
This commit is contained in:
George Kalpakas 2020-05-08 15:33:32 +03:00 committed by Kara Erickson
parent 01d1c1a9ab
commit fcb68cc139
1 changed files with 3 additions and 2 deletions
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5
aio/aio-builds-setup/scripts/update-preview-server.sh
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@ -13,7 +13,8 @@ readonly HOST_LOCALCERTS_DIR=$4
readonly HOST_LOGS_DIR=$5 readonly HOST_LOGS_DIR=$5
# Constants # Constants
readonly PROVISIONAL_IMAGE_NAME=aio-builds:provisional readonly PROVISIONAL_TAG=provisional
readonly PROVISIONAL_IMAGE_NAME=aio-builds:$PROVISIONAL_TAG
readonly LATEST_IMAGE_NAME=aio-builds:latest readonly LATEST_IMAGE_NAME=aio-builds:latest
readonly CONTAINER_NAME=aio readonly CONTAINER_NAME=aio
@ -30,7 +31,7 @@ readonly CONTAINER_NAME=aio
# Do not update the server unless files inside `aio-builds-setup/` have changed # Do not update the server unless files inside `aio-builds-setup/` have changed
# or the last attempt failed (identified by the provisional image still being around). # or the last attempt failed (identified by the provisional image still being around).
readonly relevantChangedFilesCount=$(git diff --name-only $lastDeployedCommit...HEAD | grep -P "^aio/aio-builds-setup/" | wc -l) readonly relevantChangedFilesCount=$(git diff --name-only $lastDeployedCommit...HEAD | grep -P "^aio/aio-builds-setup/" | wc -l)
readonly lastAttemptFailed=$(sudo docker rmi "$PROVISIONAL_IMAGE_NAME" >> /dev/fd/3 && echo "true" || echo "false") readonly lastAttemptFailed=$(sudo docker image ls | grep "$PROVISIONAL_TAG" >> /dev/fd/3 && echo "true" || echo "false")
if [[ $relevantChangedFilesCount -eq 0 ]] && [[ "$lastAttemptFailed" != "true" ]]; then if [[ $relevantChangedFilesCount -eq 0 ]] && [[ "$lastAttemptFailed" != "true" ]]; then
echo "Skipping update because no relevant files have been touched." echo "Skipping update because no relevant files have been touched."
exit 0 exit 0