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devtool: deploy-target: preserve existing files

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If files would be overwritten by the deployment, preserve them in a
separate location on the target so that they can be restored if you
later run devtool undeploy-target.

At the same time, also check for sufficient space before starting the
operation so that we avoid potentially failing part way through.

Fixes [YOCTO #8978].

(From OE-Core rev: a2da55712691bcf1066c53d813107d75213d6b10)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Paul Eggleton 2016-02-19 22:38:59 +13:00 committed by Richard Purdie
parent 2059a344b6
commit a8e0e5ecd3
1 changed files with 78 additions and 9 deletions
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87
scripts/lib/devtool/deploy.py
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@ -28,7 +28,7 @@ logger = logging.getLogger('devtool')
deploylist_path = '/.devtool'
def _prepare_remote_script(deploy, verbose=False, dryrun=False, undeployall=False):
def _prepare_remote_script(deploy, verbose=False, dryrun=False, undeployall=False, nopreserve=False, nocheckspace=False):
"""
Prepare a shell script for running on the target to
deploy/undeploy files. We have to be careful what we put in this
@ -48,6 +48,7 @@ def _prepare_remote_script(deploy, verbose=False, dryrun=False, undeployall=Fals
if not deploy:
lines.append('echo "Previously deployed files for $1:"')
lines.append('manifest="%s/$1.list"' % deploylist_path)
lines.append('preservedir="%s/$1.preserve"' % deploylist_path)
lines.append('if [ -f $manifest ] ; then')
# Read manifest in reverse and delete files / remove empty dirs
lines.append(' sed \'1!G;h;$!d\' $manifest | while read file')
@ -58,7 +59,10 @@ def _prepare_remote_script(deploy, verbose=False, dryrun=False, undeployall=Fals
lines.append(' fi')
else:
lines.append(' if [ -d $file ] ; then')
lines.append(' rmdir $file > /dev/null 2>&1 || true')
# Avoid deleting a preserved directory in case it has special perms
lines.append(' if [ ! -d $preservedir/$file ] ; then')
lines.append(' rmdir $file > /dev/null 2>&1 || true')
lines.append(' fi')
lines.append(' else')
lines.append(' rm $file')
lines.append(' fi')
@ -71,6 +75,39 @@ def _prepare_remote_script(deploy, verbose=False, dryrun=False, undeployall=Fals
lines.append('fi')
if deploy:
if not nocheckspace:
# Check for available space
# FIXME This doesn't take into account files spread across multiple
# partitions, but doing that is non-trivial
# Find the part of the destination path that exists
lines.append('checkpath="$2"')
lines.append('while [ "$checkpath" != "/" ] && [ ! -e $checkpath ]')
lines.append('do')
lines.append(' checkpath=`dirname "$checkpath"`')
lines.append('done')
lines.append('freespace=`df -P $checkpath | sed "1d" | awk \'{ print $4 }\'`')
# First line of the file is the total space
lines.append('total=`head -n1 $3`')
lines.append('if [ $total -gt $freespace ] ; then')
lines.append(' echo "ERROR: insufficient space on target (available ${freespace}, needed ${total})"')
lines.append(' exit 1')
lines.append('fi')
if not nopreserve:
# Preserve any files that exist. Note that this will add to the
# preserved list with successive deployments if the list of files
# deployed changes, but because we've deleted any previously
# deployed files at this point it will never preserve anything
# that was deployed, only files that existed prior to any deploying
# (which makes the most sense)
lines.append('cat $3 | sed "1d" | while read file fsize')
lines.append('do')
lines.append(' if [ -e $file ] ; then')
lines.append(' dest="$preservedir/$file"')
lines.append(' mkdir -p `dirname $dest`')
lines.append(' mv $file $dest')
lines.append(' fi')
lines.append('done')
lines.append('rm $3')
lines.append('mkdir -p `dirname $manifest`')
lines.append('mkdir -p $2')
if verbose:
@ -78,6 +115,14 @@ def _prepare_remote_script(deploy, verbose=False, dryrun=False, undeployall=Fals
else:
lines.append(' tar xv -C $2 -f - > $manifest')
lines.append('sed -i "s!^./!$2!" $manifest')
elif not dryrun:
# Put any preserved files back
lines.append('if [ -d $preservedir ] ; then')
lines.append(' cd $preservedir')
lines.append(' find . -type f -exec mv {} /{} \;')
lines.append(' cd /')
lines.append(' rm -rf $preservedir')
lines.append('fi')
if undeployall:
if not dryrun:
@ -94,6 +139,7 @@ def _prepare_remote_script(deploy, verbose=False, dryrun=False, undeployall=Fals
def deploy(args, config, basepath, workspace):
"""Entry point for the devtool 'deploy' subcommand"""
import re
import math
import oe.recipeutils
check_workspace_recipe(workspace, args.recipename, checksrc=False)
@ -119,11 +165,23 @@ def deploy(args, config, basepath, workspace):
'recipe? If so, the install step has not installed '
'any files.' % args.recipename)
filelist = []
ftotalsize = 0
for root, _, files in os.walk(recipe_outdir):
for fn in files:
# Get the size in kiB (since we'll be comparing it to the output of du -k)
# MUST use lstat() here not stat() or getfilesize() since we don't want to
# dereference symlinks
fsize = int(math.ceil(float(os.lstat(os.path.join(root, fn)).st_size)/1024))
ftotalsize += fsize
# The path as it would appear on the target
fpath = os.path.join(destdir, os.path.relpath(root, recipe_outdir), fn)
filelist.append((fpath, fsize))
if args.dry_run:
print('Files to be deployed for %s on target %s:' % (args.recipename, args.target))
for root, _, files in os.walk(recipe_outdir):
for fn in files:
print(' %s' % os.path.join(destdir, os.path.relpath(root, recipe_outdir), fn))
for item, _ in filelist:
print(' %s' % item)
return 0
@ -140,11 +198,20 @@ def deploy(args, config, basepath, workspace):
tmpdir = tempfile.mkdtemp(prefix='devtool')
try:
tmpscript = '/tmp/devtool_deploy.sh'
shellscript = _prepare_remote_script(deploy=True, verbose=args.show_status)
tmpfilelist = os.path.join(os.path.dirname(tmpscript), 'devtool_deploy.list')
shellscript = _prepare_remote_script(deploy=True,
verbose=args.show_status,
nopreserve=args.no_preserve,
nocheckspace=args.no_check_space)
# Write out the script to a file
with open(os.path.join(tmpdir, os.path.basename(tmpscript)), 'w') as f:
f.write(shellscript)
# Copy it to the target
# Write out the file list
with open(os.path.join(tmpdir, os.path.basename(tmpfilelist)), 'w') as f:
f.write('%d\n' % ftotalsize)
for fpath, fsize in filelist:
f.write('%s %d\n' % (fpath, fsize))
# Copy them to the target
ret = subprocess.call("scp %s %s/* %s:%s" % (extraoptions, tmpdir, args.target, os.path.dirname(tmpscript)), shell=True)
if ret != 0:
raise DevtoolError('Failed to copy script to %s - rerun with -s to '
@ -153,7 +220,7 @@ def deploy(args, config, basepath, workspace):
shutil.rmtree(tmpdir)
# Now run the script
ret = exec_fakeroot(rd, 'tar cf - . | ssh %s %s \'sh %s %s %s\'' % (extraoptions, args.target, tmpscript, args.recipename, destdir), cwd=recipe_outdir, shell=True)
ret = exec_fakeroot(rd, 'tar cf - . | ssh %s %s \'sh %s %s %s %s\'' % (extraoptions, args.target, tmpscript, args.recipename, destdir, tmpfilelist), cwd=recipe_outdir, shell=True)
if ret != 0:
raise DevtoolError('Deploy failed - rerun with -s to get a complete '
'error message')
@ -213,13 +280,15 @@ def register_commands(subparsers, context):
"""Register devtool subcommands from the deploy plugin"""
parser_deploy = subparsers.add_parser('deploy-target',
help='Deploy recipe output files to live target machine',
description='Deploys a recipe\'s build output (i.e. the output of the do_install task) to a live target machine over ssh. Note: this only deploys the recipe itself and not any runtime dependencies, so it is assumed that those have been installed on the target beforehand.',
description='Deploys a recipe\'s build output (i.e. the output of the do_install task) to a live target machine over ssh. By default, any existing files will be preserved instead of being overwritten and will be restored if you run devtool undeploy-target. Note: this only deploys the recipe itself and not any runtime dependencies, so it is assumed that those have been installed on the target beforehand.',
group='testbuild')
parser_deploy.add_argument('recipename', help='Recipe to deploy')
parser_deploy.add_argument('target', help='Live target machine running an ssh server: user@hostname[:destdir]')
parser_deploy.add_argument('-c', '--no-host-check', help='Disable ssh host key checking', action='store_true')
parser_deploy.add_argument('-s', '--show-status', help='Show progress/status output', action='store_true')
parser_deploy.add_argument('-n', '--dry-run', help='List files to be deployed only', action='store_true')
parser_deploy.add_argument('-p', '--no-preserve', help='Do not preserve existing files', action='store_true')
parser_deploy.add_argument('--no-check-space', help='Do not check for available space before deploying', action='store_true')
parser_deploy.set_defaults(func=deploy)
parser_undeploy = subparsers.add_parser('undeploy-target',