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These changes aim to avoid the requirement for root privileges when
setting the password of root user on root file system.
The "-R, --root" flag of chpasswd is using chroot to apply changes in
root file system and this requires root privileges. [1]
Instead compute hash of the root password using passlib [2] and insert
the value in the /etc/shadow file in the rootfs.
[1] https://en.wikipedia.org/wiki/Chroot#Limitations
[2] http://passlib.readthedocs.io/en/stable/lib/passlib.hosts.html
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Handle differences between version 1 and 2 of the Manifest file for
Docker registry.
Layers' blob sums in v1 are stored in a list "fsLayers" and the digest
is stored in following filed with name "blobSum". [1]
In v2 the layer list is stored in field with name "layers" and
ordered starting from the base image (opposite order of v1). The digest
is stored under a following field with name "digest". The size in bytes
is included in a field with name "size". [2]
[1] https://docs.docker.com/registry/spec/manifest-v2-1/#manifest-field-descriptions
[2] https://docs.docker.com/registry/spec/manifest-v2-2/#image-manifest-field-descriptions
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Encoded Unicode in Python 3 is represented as binary data. The
difference with Python2 is that any attempt to mix text and data in
Python 3.0 raises TypeError, whereas if you were to mix Unicode and
8-bit strings in Python 2.x, it would work if the 8-bit string happened
to contain only 7-bit (ASCII) bytes, but you would get
UnicodeDecodeError if it contained non-ASCII values.
Reference:
https://docs.python.org/release/3.0.1/whatsnew/3.0.html#text-vs-data-instead-of-unicode-vs-8-bit
Example:
Python 2:
>>> b'foo.bar'.split('.')
['foo', 'bar']
Python 3:
>>> b'foo.bar'.split('.')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: a bytes-like object is required, not 'str'
>>> b'foo.bar'.split(b'.')
[b'foo', b'bar']
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Remove traling space which occurs when the number is
smaller than kibibyte.
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When converting 0 KB with string input the result will be string
with zeroes.
>>> print(size_to_bytes('0', 'KB'))
000000...
Instead convert the string input to integer and then perform the conversion.
Rename the variable from "string" to "number" to avoid confusion.
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rename the function to match its counterpart size_to_bytes().
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Add new module to collect utility functions used in virt-bootstrap.
Move the function definitions from "sources" and "virt_bootstrap" to
the new module.
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