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runner.py
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runner.py
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import hashlib
import logging
import os
import subprocess
import stat
import tempfile
import time
from secrets import token_hex
import datetime
import docker
import git
import redis
from docker import APIClient
logging.getLogger("urllib3").setLevel(logging.WARNING)
logging.basicConfig(level=logging.DEBUG)
log = logging.getLogger(__name__)
REDIS_URI = os.getenv("BOOKLAB_REDIS_URI", "redis://localhost:6379/0")
rc = redis.from_url(REDIS_URI)
cli = APIClient()
log_expiration_time = 60 * 60 * 24 * 7 # 7 days
client = docker.from_env()
def get_port():
def exposed_ports():
for c in client.containers.list():
for v in c.attrs['NetworkSettings']['Ports'].values():
if v:
for p in v:
yield int(p['HostPort'])
port = 8888
while port in set(exposed_ports()):
port += 1
return port
class Runner:
"""
Runne class steps:
1- git clone repo with branch in tmpd dir
2- run docker build and store log lines in redis list key log:<path>:<branch> (expiration 7days)
Between each step, status is updated in redis hash status with key <path>:<branch>
"""
def __init__(self, path, branch, username, tmpdir):
self.path = path
self.branch = branch
self.username = username
self.tmpdir = tmpdir
self.tag = "%s:%s_%s" % (path.lower(), branch, username)
self.lk = "log:%s:%s:%s" % (path, branch, username) # redis log key
rc.delete(self.lk)
rc.rpush(self.lk, "init")
rc.expire(self.lk, log_expiration_time)
gitlab_host = rc.hget("conf", 'gitlab_host').decode('utf8')
self.git_url = "git@%s:%s" % (gitlab_host, self.path)
private_key_path = self.checkout_private_ssh_key(tmpdir)
self.git_ssh_cmd = 'ssh -o StrictHostKeyChecking=no -i %s' % private_key_path
log.info("build started for %s:%s", path, branch)
try:
self.clone_repo()
self.build()
except (docker.errors.APIError, git.exc.GitCommandError) as e:
rc.rpush(self.lk, str(e))
self.status("error")
log.error(str(e))
print(str(e))
def clone_repo(self):
"""
Checkout the repository in a local directory
The private ssh key to clone the repo is in the redis key ssh:path:branch and deleted after
Will create 2 folders in tmpdirname:
.ssh : with the private ssh key inside
repo : with the source code
TODO: instead of clone, pull update but GitPython doesn't allow it easly
:return:
"""
self.status("clone")
self.log("clone repo %s" % self.git_url)
git.Repo.clone_from(self.git_url, branch=self.branch, to_path=os.path.join(self.tmpdir, 'repo'),
env=dict(GIT_SSH_COMMAND=self.git_ssh_cmd))
def checkout_private_ssh_key(self, tmpdir):
ssh_rk = "ssh:%s:%s:%s" % (self.path, self.branch, self.username)
if not rc.exists(ssh_rk):
raise git.exc.GitCommandError("No ssh private key available for checkout")
sshdir = os.path.join(tmpdir, '.ssh')
os.mkdir(sshdir)
private_key_path = os.path.join(sshdir, 'sshkey')
with open(private_key_path, 'w+') as f:
f.writelines(rc.get(ssh_rk).decode('utf8'))
rc.delete(ssh_rk)
os.chmod(sshdir, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
os.chmod(private_key_path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
return private_key_path
def build(self):
"""
Build the docker image using jupyter-repo2docker
logs are publish on channel path:branch and copied in a list log:path:branch (expire after 24 hours)
:return:
"""
self.status("build")
log.info("run repo2docker to produce image " + self.tag)
cmd = "/usr/bin/repo2docker --no-run " \
"--user-id %s --user-name %s " \
"--image-name %s %s" % (os.environ.get('BOOKLAB_UID'), os.environ.get('BOOKLAB_USER'),
self.tag, os.path.join(self.tmpdir, 'repo'))
log.info("repo2docker cmd %s", cmd)
process = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
for line in iter(process.stdout.readline, b''):
self.log(line.rstrip())
self.status("image")
def parse_logs(self, container):
logs = set()
while container.status in ["running", "created"]:
for l in container.logs().decode('utf8').split('\n'):
if l not in logs:
self.log(l)
logs.add(l)
time.sleep(1)
container.reload()
def run(self):
self.status("run")
taghostname = hashlib.sha1((self.path + self.branch + self.username).encode('utf8')).hexdigest()[0:8]
traefik_labels = {"traefik.frontend.rule": "Host:%s.%s" % (taghostname, rc.hget("conf", "host").decode('utf8'))}
nbtoken = rc.get("token:%s:%s:%s" % (self.path, self.branch, self.username))
ep = "jupyter notebook --ip=0.0.0.0 --allow-root --no-browser --NotebookApp.token='%s'" % nbtoken.decode('utf8')
repodir = os.path.join(os.environ.get('BOOKLAB_TMP'), self.tmpdir.split(os.path.sep)[-1], "repo")
chown = "chown -R %s %s" % (os.environ.get('BOOKLAB_USER'), repodir)
chown = "chmod -R 777 %s" % repodir # TODO fix with chown
subprocess.run(chown.split())
vol = {repodir: {'bind': '/home/%s' % os.environ.get('BOOKLAB_USER'), 'mode': 'rw'}}
self.log(ep)
self.log(vol)
client.containers.run(self.tag, ep, ports={"8888/tcp": get_port()}, detach=False, stderr=True, volumes=vol,
user=os.environ.get('BOOKLAB_USER'), labels=traefik_labels, network="traefik")
self.push_backup()
def push_backup(self):
repodir = os.path.join(self.tmpdir, 'repo')
repo = git.Repo(repodir)
branch = "booklab %s %s" % (self.username, datetime.datetime.now())
branch = branch.replace(' ', '_').replace('.', '_').replace(':', '_')
repo.git.checkout('HEAD', b=branch)
repo.index.add([f for f in os.listdir(repodir) if not f.startswith('.')])
repo.index.commit("backup")
repo.git.push('origin', branch, env=dict(GIT_SSH_COMMAND=self.git_ssh_cmd))
def status(self, s):
rc.hset("status", "%s:%s:%s" % (self.path, self.branch, self.username), s)
self.log("status %s:%s:%s %s" % (self.path, self.branch, self.username, s))
def log(self, l):
rc.publish(self.tag, l)
rc.rpush(self.lk, l)
log.info(l)
print("log", l)
if __name__ == '__main__':
id = token_hex(8)
print(id)
while True:
rc.sadd("runners", id)
rc.setex("heartbeat:" + id, True, 10)
for pb, status in rc.hgetall("status").items():
if status == b"todo" and not rc.sismember("to_build", pb): # feature add if path/branch in app2build
rc.sadd("to_build", pb) # to_build set ensures build atomicity for several builder
pb = rc.spop("to_build")
if pb:
path, branch, username = pb.decode('utf8').split(":")
with tempfile.TemporaryDirectory(prefix=id) as tmpdir:
print(tmpdir)
r = Runner(path, branch, username, tmpdir)
r.run()
time.sleep(2)
print(".", end='', flush=True)