Allow overriding backup timestamp #292
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There already was a switch in place for the Python executable, but both the readlink and cp commands use flags not present on the default macOS binaries. This commit adds a check upfront and aborts with a message about you needing the coreutils package from homebrew to get the GNU variants of both commands.
Allows specifying a custom location of the "tar" command to use.
Also, the flags sent to "tar" are sent individually (`tar -cf` becomes `tar -c -f`).
This allows easily customizing how the archiving is performed without having to add
lots of new options. For example, you could encrypt backup data via a simple shell script
and specify it for --archive.tar.binary:
```
#!/bin/bash
gpg_pubkey_id=XXXXXXX
new_args=""
while [ "${#}" -gt 0 ]; do
case "$1" in
-f)
shift;
original_output_file="${1}"
shift
new_args="${new_args} --to-stdout"
;;
*)
new_args="${new_args} ${1}"
shift
;;
esac
done
tar ${new_args} | gpg --always-trust --encrypt --recipient ${gpg_pubkey_id} -z 0 --output ${original_output_file}
```
This has several advantages:
* Backups are never written to disk unencrypted
* Encryption can be done in one go, instead of causing the potentially heavy additional
I/O a separate encryption step would incur.
* It's transparent for the upload stages, so you can still benefit from the integrated
S3 (or other) uploads.
The S3 uploader fails if bucket permissions are restricted to only allow accessing certain prefixes in a bucket. The default behavior for boto's "get_bucket()" is to "validate" it by accessing the bucket's root, needlessly breaking the uploader even though all necessary permissions might be present. This patch adds a new command line switch --upload.s3.skip_bucket_validation to disable this behavior.
Allows overriding the timestamp manually. Useful (for example) if the backup and archiving steps worked, but the upload failed for some reason. In that case you could set backup and archive methods to "none", override the timestamp and retry just the upload.
timvaillancourt
suggested changes
Dec 6, 2018
There was a problem hiding this comment.
LGTM but please add new flag to https://github.com/Percona-Lab/mongodb_consistent_backup/blob/master/conf/mongodb-consistent-backup.example.conf
timvaillancourt
approved these changes
Dec 7, 2018
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Adds a new parameter
--backup-time.Allows overriding the timestamp manually.
Useful (for example) if the backup and archiving steps worked, but the
upload failed for some reason.
In that case you could set backup and archive methods to "none",
override the timestamp and retry just the upload.