Commit a7f38bb5 authored by Raphael Defosseux's avatar Raphael Defosseux

feat(ci): flatten image to one layer to reduce image to the max

Signed-off-by: default avatarRaphael Defosseux <raphael.defosseux@openairinterface.org>
parent de784123
...@@ -20,12 +20,14 @@ ...@@ -20,12 +20,14 @@
""" """
import argparse import argparse
import re
import subprocess
import sys import sys
def main() -> None: def main() -> None:
args = _parse_args() args = _parse_args()
print (f'Does nothing for the moment on {args.tag}') status = perform_flattening(args.tag)
sys.exit(0) sys.exit(status)
def _parse_args() -> argparse.Namespace: def _parse_args() -> argparse.Namespace:
parser = argparse.ArgumentParser(description='Flattening Image') parser = argparse.ArgumentParser(description='Flattening Image')
...@@ -38,5 +40,50 @@ def _parse_args() -> argparse.Namespace: ...@@ -38,5 +40,50 @@ def _parse_args() -> argparse.Namespace:
) )
return parser.parse_args() return parser.parse_args()
def perform_flattening(tag):
# First detect which docker/podman command to use
cli = ''
image_prefix = ''
cmd = 'which podman || true'
podman_check = subprocess.check_output(cmd, shell=True, universal_newlines=True)
if re.search('podman', podman_check.strip()):
cli = 'sudo podman'
image_prefix = 'localhost/'
if cli == '':
cmd = 'which docker || true'
docker_check = subprocess.check_output(cmd, shell=True, universal_newlines=True)
if re.search('docker', docker_check.strip()):
cli = 'docker'
image_prefix = ''
if cli == '':
print ('No docker / podman installed: quitting')
return -1
print (f'Flattening {tag}')
# Creating a container
cmd = cli + ' run --name test-flatten --entrypoint /bin/true -d ' + tag
print (cmd)
subprocess.check_output(cmd, shell=True, universal_newlines=True)
# Export / Import trick
cmd = cli + ' export test-flatten | ' + cli + ' import '
cmd += ' --change "ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" '
cmd += ' --change "WORKDIR /openair-nrf" '
cmd += ' --change "EXPOSE 80/tcp" '
cmd += ' --change "EXPOSE 9090/tcp" '
cmd += ' --change "CMD [\\"/openair-nrf/bin/oai_nrf\\", \\"-c\\", \\"/openair-nrf/etc/nrf.conf\\", \\"-o\\"]" '
cmd += ' --change "ENTRYPOINT [\\"/bin/bash\\", \\"/openair-nrf/bin/entrypoint.sh\\"]" '
cmd += ' - ' + image_prefix + tag
print (cmd)
subprocess.check_output(cmd, shell=True, universal_newlines=True)
# Remove container
cmd = cli + ' rm -f test-flatten'
print (cmd)
subprocess.check_output(cmd, shell=True, universal_newlines=True)
# At this point the original image is a dangling image.
# CI pipeline will clean up (`image prune --force`)
return 0
if __name__ == '__main__': if __name__ == '__main__':
main() main()
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