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# ============LICENSE_START====================================================
# org.onap.dcae
# =============================================================================
# Copyright (c) 2019 AT&T Intellectual Property. All rights reserved.
# =============================================================================
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============LICENSE_END======================================================
import os
from docker import APIClient
from aoconversion import exceptions, utils
def _generate_dockerfile(meta, model_name):
"""
bind the templated docker string
"""
docker_template = """
FROM python:{VERSION}
ENV MODELNAME {MODELNAME}
RUN mkdir /app
WORKDIR /app
ADD ./{MODELNAME} /app/{MODELNAME}
ADD ./requirements.txt /app
RUN pip install -r /app/requirements.txt && \
pip install acumos_dcae_model_runner
ENV DCAEPORT=10000
EXPOSE $DCAEPORT
ENTRYPOINT ["acumos_dcae_model_runner"]
CMD ["/app/{MODELNAME}"]
"""
python_version = meta["runtime"]["version"]
return docker_template.format(VERSION=python_version, MODELNAME=model_name)
# Public
def build_and_push_docker(config, model_name, model_version="latest"):
"""
build and push the dcae docker container
Returns the docker uri so this can be pipelined into specgen
"""
model_repo_path = config.tmpdir
dockerfile_path = "{0}/Dockerfile".format(model_repo_path)
reqs_path = "{0}/requirements.txt".format(model_repo_path)
# get the metadata
meta = utils.get_metadata(model_repo_path, model_name)
# write the reqs file, will be removed later
reqs = meta["runtime"]["dependencies"]["pip"]["requirements"]
with open(reqs_path, "w") as f:
for r in reqs:
f.write("{0}=={1}\n".format(r["name"], r["version"]))
# generate the dockerfile
dockerfile = _generate_dockerfile(meta, model_name)
# write the dockerfile, will be removed later
with open("{0}/Dockerfile".format(model_repo_path), "w") as f:
f.write(dockerfile)
docker_uri = "{0}/{1}:{2}".format(config.dockerregistry, model_name, model_version)
# do the docker build
cli = APIClient(base_url=config.dockerhost, user_agent="Docker-Client-xx.yy")
response = [line.decode() for line in cli.build(path=model_repo_path, rm=True, tag=docker_uri)]
# clean up the files
os.remove(dockerfile_path)
os.remove(reqs_path)
# parse the Docker response to see whether we succeeded
for r in response:
# In some scenarios, for example a non-existing Dockerfile, docker build raises a native exception, see:
# https://docker-py.readthedocs.io/en/stable/api.html#module-docker.api.build
# However, if something fails such as a non-existing directory referenced in the dockerfile, NO exception is raised.
# In this case, one of the console output lines is "errorDetail"....
if "errorDetail" in r:
raise exceptions.DockerBuildFail(r)
# if the above succeeded, we can push
# push. same problem as above; e.g., "no basic auth credentials" does not throw an exception!
response = [
line.decode()
for line in cli.push(
repository=docker_uri, auth_config={"username": config.dockeruser, "password": config.dockerpass()}, stream=True
)
]
for r in response:
if "errorDetail" in r:
raise exceptions.DockerPushFail(r)
return docker_uri
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