import logging
import os
import re
-import shlex
from subprocess import CalledProcessError
import tempfile
-import time
import uuid
from juju.client import client
-import n2vc.exceptions
-import paramiko
import asyncio
arches = [
DETECTION_SCRIPT = """#!/bin/bash
set -e
os_id=$(grep '^ID=' /etc/os-release | tr -d '"' | cut -d= -f2)
-if [ "$os_id" = 'centos' ]; then
+if [ "$os_id" = 'centos' ] || [ "$os_id" = 'rhel' ] ; then
os_version=$(grep '^VERSION_ID=' /etc/os-release | tr -d '"' | cut -d= -f2)
- echo "centos$os_version"
+ echo "$os_id$os_version"
else
lsb_release -cs
fi
echo 'ubuntu ALL=(ALL) NOPASSWD:ALL' > $temp
install -m 0440 $temp /etc/sudoers.d/90-juju-ubuntu
rm $temp
-su ubuntu -c 'install -D -m 0600 /dev/null ~/.ssh/authorized_keys'
+su ubuntu -c '[ -f ~/.ssh/authorized_keys ] || install -D -m 0600 /dev/null ~/.ssh/authorized_keys'
export authorized_keys="{}"
if [ ! -z "$authorized_keys" ]; then
su ubuntu -c 'echo $authorized_keys >> ~/.ssh/authorized_keys'
IPTABLES_SCRIPT = """#!/bin/bash
set -e
-apt-get update
-DEBIAN_FRONTEND=noninteractive apt-get install -yqq iptables-persistent
+[ -v `which netfilter-persistent` ] && apt update \
+ && DEBIAN_FRONTEND=noninteractive apt-get install -yqq iptables-persistent
iptables -t nat -A OUTPUT -p tcp -d {} -j DNAT --to-destination {}
netfilter-persistent save
"""
+IPTABLES_SCRIPT_RHEL = """#!/bin/bash
+set -e
+[ -v `which firewalld` ] && yum install -q -y firewalld
+systemctl is-active --quiet firewalld || systemctl start firewalld \
+ && firewall-cmd --permanent --zone=public --set-target=ACCEPT
+systemctl is-enabled --quiet firewalld || systemctl enable firewalld
+firewall-cmd --direct --permanent --add-rule ipv4 nat OUTPUT 0 -d {} -p tcp \
+ -j DNAT --to-destination {}
+firewall-cmd --reload
+"""
+
+CLOUD_INIT_WAIT_SCRIPT = """#!/bin/bash
+set -e
+cloud-init status --wait
+"""
+
class AsyncSSHProvisioner:
"""Provision a manually created machine via SSH."""
params.series = hw["series"]
params.instance_id = "manual:{}".format(self.host)
params.nonce = "manual:{}:{}".format(
- self.host, str(uuid.uuid4()),
+ self.host,
+ str(uuid.uuid4()),
) # a nop for Juju w/manual machines
params.hardware_characteristics = {
"arch": hw["arch"],
return params
- async def install_agent(self, connection, nonce, machine_id, api):
+ async def install_agent(
+ self, connection, nonce, machine_id, proxy=None, series=None
+ ):
"""
:param object connection: Connection to Juju API
:param str nonce: The nonce machine specification
:param str machine_id: The id assigned to the machine
- :param str api: IP of the API_PROXY
+ :param str proxy: IP of the API_PROXY
+ :param str series: OS name
:return: bool: If the initialization was successful
"""
- 127.0.0.1:17070
- '[::1]:17070'
"""
- m = re.search(r"apiaddresses:\n- (\d+\.\d+\.\d+\.\d+):17070", results.script)
- apiaddress = m.group(1)
-
- """Add IP Table rule
-
- In order to route the traffic to the private ip of the Juju controller
- we use a DNAT rule to tell the machine that the destination for the
- private address is the public address of the machine where the Juju
- controller is running in LXD. That machine will have a complimentary
- iptables rule, routing traffic to the appropriate LXD container.
- """
-
- script = IPTABLES_SCRIPT.format(apiaddress, api)
-
- # Run this in a retry loop, because dpkg may be running and cause the
- # script to fail.
- retry = 10
- attempts = 0
- delay = 15
-
- while attempts <= retry:
- try:
- attempts += 1
- stdout, stderr = await self._run_configure_script(script)
- break
- except Exception as e:
- self.log.debug("Waiting for dpkg, sleeping {} seconds".format(delay))
- if attempts > retry:
- raise e
- else:
- await asyncio.sleep(delay)
- # Slowly back off the retry
- delay += 15
+ try:
+ # Wait until cloud-init finish
+ await self._run_configure_script(CLOUD_INIT_WAIT_SCRIPT)
+ except Exception:
+ self.log.debug("cloud-init not present in machine {}".format(machine_id))
+
+ if proxy:
+ m = re.search(
+ r"apiaddresses:\n- (\d+\.\d+\.\d+\.\d+):17070", results.script
+ )
+ apiaddress = m.group(1)
+
+ """Add IP Table rule
+
+ In order to route the traffic to the private ip of the Juju controller
+ we use a DNAT rule to tell the machine that the destination for the
+ private address is the public address of the machine where the Juju
+ controller is running in LXD. That machine will have a complimentary
+ iptables rule, routing traffic to the appropriate LXD container.
+ """
+
+ if series and ("centos" in series or "rhel" in series):
+ script = IPTABLES_SCRIPT_RHEL.format(apiaddress, proxy)
+ else:
+ script = IPTABLES_SCRIPT.format(apiaddress, proxy)
+
+ # Run this in a retry loop, because dpkg may be running and cause the
+ # script to fail.
+ retry = 10
+ attempts = 0
+ delay = 15
+
+ while attempts <= retry:
+ try:
+ attempts += 1
+ stdout, stderr = await self._run_configure_script(script)
+ break
+ except Exception as e:
+ self.log.debug(
+ "Waiting for DNAT rules to be applied and saved, "
+ "sleeping {} seconds".format(delay)
+ )
+ if attempts > retry:
+ raise e
+ else:
+ await asyncio.sleep(delay)
+ # Slowly back off the retry
+ delay += 15
# self.log.debug("Running configure script")
await self._run_configure_script(results.script)
return await self._ssh(
"{} /bin/bash {}".format("sudo" if root else "", tmpFile)
)
-
-
-class SSHProvisioner:
- """Provision a manually created machine via SSH."""
-
- def __init__(self, user, host, private_key_path, log=None):
-
- self.host = host
- self.user = user
- self.private_key_path = private_key_path
-
- if log:
- self.log = log
- else:
- self.log = logging.getLogger(__name__)
-
- def _get_ssh_client(self, host=None, user=None, private_key_path=None):
- """Return a connected Paramiko ssh object.
-
- :param str host: The host to connect to.
- :param str user: The user to connect as.
- :param str key: The private key to authenticate with.
-
- :return: object: A paramiko.SSHClient
- :raises: :class:`paramiko.ssh_exception.SSHException` if the
- connection failed
- """
-
- if not host:
- host = self.host
-
- if not user:
- user = self.user
-
- if not private_key_path:
- private_key_path = self.private_key_path
-
- ssh = paramiko.SSHClient()
- ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
-
- pkey = None
-
- # Read the private key into a paramiko.RSAKey
- if os.path.exists(private_key_path):
- with open(private_key_path, "r") as f:
- pkey = paramiko.RSAKey.from_private_key(f)
-
- #######################################################################
- # There is a bug in some versions of OpenSSH 4.3 (CentOS/RHEL5) where #
- # the server may not send the SSH_MSG_USERAUTH_BANNER message except #
- # when responding to an auth_none request. For example, paramiko will #
- # attempt to use password authentication when a password is set, but #
- # the server could deny that, instead requesting keyboard-interactive.#
- # The hack to workaround this is to attempt a reconnect, which will #
- # receive the right banner, and authentication can proceed. See the #
- # following for more info: #
- # https://github.com/paramiko/paramiko/issues/432 #
- # https://github.com/paramiko/paramiko/pull/438 #
- #######################################################################
-
- retry = 10
- attempts = 0
- delay = 15
- while attempts <= retry:
- try:
- attempts += 1
-
- # Attempt to establish a SSH connection
- ssh.connect(
- host,
- port=22,
- username=user,
- pkey=pkey,
- # allow_agent=False,
- # look_for_keys=False,
- )
- break
- except paramiko.ssh_exception.SSHException as e:
- if "Error reading SSH protocol banner" == str(e):
- # Once more, with feeling
- ssh.connect(host, port=22, username=user, pkey=pkey)
- else:
- # Reraise the original exception
- self.log.debug("Unhandled exception caught: {}".format(e))
- raise e
- except Exception as e:
- if "Unable to connect to port" in str(e):
- self.log.debug(
- "Waiting for VM to boot, sleeping {} seconds".format(delay)
- )
- if attempts > retry:
- raise e
- else:
- time.sleep(delay)
- # Slowly back off the retry
- delay += 15
- else:
- self.log.debug(e)
- raise e
- return ssh
-
- def _run_command(self, ssh, cmd, pty=True):
- """Run a command remotely via SSH.
-
- :param object ssh: The SSHClient
- :param str cmd: The command to execute
- :param list cmd: The `shlex.split` command to execute
- :param bool pty: Whether to allocate a pty
-
- :return: tuple: The stdout and stderr of the command execution
- :raises: :class:`CalledProcessError` if the command fails
- """
-
- if isinstance(cmd, str):
- cmd = shlex.split(cmd)
-
- if type(cmd) is not list:
- cmd = [cmd]
-
- cmds = " ".join(cmd)
- _, stdout, stderr = ssh.exec_command(cmds, get_pty=pty)
- retcode = stdout.channel.recv_exit_status()
-
- if retcode > 0:
- output = stderr.read().strip()
- raise CalledProcessError(returncode=retcode, cmd=cmd, output=output)
- return (
- stdout.read().decode("utf-8").strip(),
- stderr.read().decode("utf-8").strip(),
- )
-
- def _init_ubuntu_user(self):
- """Initialize the ubuntu user.
-
- :return: bool: If the initialization was successful
- :raises: :class:`paramiko.ssh_exception.AuthenticationException`
- if the authentication fails
- """
- ssh = None
- try:
- # Run w/o allocating a pty, so we fail if sudo prompts for a passwd
- ssh = self._get_ssh_client()
- self._run_command(ssh, "sudo -n true", pty=False)
- except paramiko.ssh_exception.AuthenticationException:
- raise n2vc.exceptions.AuthenticationFailed(self.user)
- except paramiko.ssh_exception.NoValidConnectionsError:
- raise n2vc.exceptions.NoRouteToHost(self.host)
- finally:
- if ssh:
- ssh.close()
-
- # Infer the public key
- public_key_path = "{}.pub".format(self.private_key_path)
-
- if not os.path.exists(public_key_path):
- raise FileNotFoundError(
- "Public key '{}' doesn't exist.".format(public_key_path)
- )
-
- with open(public_key_path, "r") as f:
- public_key = f.readline()
-
- script = INITIALIZE_UBUNTU_SCRIPT.format(public_key)
-
- try:
- ssh = self._get_ssh_client()
-
- self._run_command(
- ssh, ["sudo", "/bin/bash -c " + shlex.quote(script)], pty=True
- )
- except paramiko.ssh_exception.AuthenticationException as e:
- raise e
- finally:
- ssh.close()
-
- return True
-
- def _detect_hardware_and_os(self, ssh):
- """Detect the target hardware capabilities and OS series.
-
- :param object ssh: The SSHClient
- :return: str: A raw string containing OS and hardware information.
- """
-
- info = {
- "series": "",
- "arch": "",
- "cpu-cores": "",
- "mem": "",
- }
-
- stdout, _ = self._run_command(
- ssh, ["sudo", "/bin/bash -c " + shlex.quote(DETECTION_SCRIPT)], pty=True,
- )
-
- lines = stdout.split("\n")
-
- # Remove extraneous line if DNS resolution of hostname famils
- # i.e. sudo: unable to resolve host test-1-mgmtvm-1: Connection timed out
- if "unable to resolve host" in lines[0]:
- lines = lines[1:]
-
- info["series"] = lines[0].strip()
- info["arch"] = normalize_arch(lines[1].strip())
-
- memKb = re.split(r"\s+", lines[2])[1]
-
- # Convert megabytes -> kilobytes
- info["mem"] = round(int(memKb) / 1024)
-
- # Detect available CPUs
- recorded = {}
- for line in lines[3:]:
- physical_id = ""
-
- if line.find("physical id") == 0:
- physical_id = line.split(":")[1].strip()
- elif line.find("cpu cores") == 0:
- cores = line.split(":")[1].strip()
-
- if physical_id not in recorded.keys():
- info["cpu-cores"] += cores
- recorded[physical_id] = True
-
- return info
-
- def provision_machine(self):
- """Perform the initial provisioning of the target machine.
-
- :return: bool: The client.AddMachineParams
- :raises: :class:`paramiko.ssh_exception.AuthenticationException`
- if the upload fails
- """
- params = client.AddMachineParams()
-
- if self._init_ubuntu_user():
- try:
- ssh = self._get_ssh_client()
-
- hw = self._detect_hardware_and_os(ssh)
- params.series = hw["series"]
- params.instance_id = "manual:{}".format(self.host)
- params.nonce = "manual:{}:{}".format(
- self.host, str(uuid.uuid4()),
- ) # a nop for Juju w/manual machines
- params.hardware_characteristics = {
- "arch": hw["arch"],
- "mem": int(hw["mem"]),
- "cpu-cores": int(hw["cpu-cores"]),
- }
- params.addresses = [
- {"value": self.host, "type": "ipv4", "scope": "public"}
- ]
-
- except paramiko.ssh_exception.AuthenticationException as e:
- raise e
- finally:
- ssh.close()
-
- return params
-
- async def install_agent(self, connection, nonce, machine_id, api):
- """
- :param object connection: Connection to Juju API
- :param str nonce: The nonce machine specification
- :param str machine_id: The id assigned to the machine
-
- :return: bool: If the initialization was successful
- """
- # The path where the Juju agent should be installed.
- data_dir = "/var/lib/juju"
-
- # Disabling this prevents `apt-get update` from running initially, so
- # charms will fail to deploy
- disable_package_commands = False
-
- client_facade = client.ClientFacade.from_connection(connection)
- results = await client_facade.ProvisioningScript(
- data_dir=data_dir,
- disable_package_commands=disable_package_commands,
- machine_id=machine_id,
- nonce=nonce,
- )
-
- """Get the IP of the controller
-
- Parse the provisioning script, looking for the first apiaddress.
-
- Example:
- apiaddresses:
- - 10.195.8.2:17070
- - 127.0.0.1:17070
- - '[::1]:17070'
- """
- m = re.search(r"apiaddresses:\n- (\d+\.\d+\.\d+\.\d+):17070", results.script)
- apiaddress = m.group(1)
-
- """Add IP Table rule
-
- In order to route the traffic to the private ip of the Juju controller
- we use a DNAT rule to tell the machine that the destination for the
- private address is the public address of the machine where the Juju
- controller is running in LXD. That machine will have a complimentary
- iptables rule, routing traffic to the appropriate LXD container.
- """
-
- script = IPTABLES_SCRIPT.format(apiaddress, api)
-
- # Run this in a retry loop, because dpkg may be running and cause the
- # script to fail.
- retry = 10
- attempts = 0
- delay = 15
-
- while attempts <= retry:
- try:
- attempts += 1
-
- self._run_configure_script(script)
- break
- except Exception as e:
- self.log.debug("Waiting for dpkg, sleeping {} seconds".format(delay))
- if attempts > retry:
- raise e
- else:
- time.sleep(delay)
- # Slowly back off the retry
- delay += 15
-
- # self.log.debug("Running configure script")
- self._run_configure_script(results.script)
- # self.log.debug("Configure script finished")
-
- def _run_configure_script(self, script: str):
- """Run the script to install the Juju agent on the target machine.
-
- :param str script: The script returned by the ProvisioningScript API
- :raises: :class:`paramiko.ssh_exception.AuthenticationException`
- if the upload fails
- """
- _, tmpFile = tempfile.mkstemp()
- with open(tmpFile, "w") as f:
- f.write(script)
- try:
- # get ssh client
- ssh = self._get_ssh_client(user="ubuntu",)
-
- # copy the local copy of the script to the remote machine
- sftp = paramiko.SFTPClient.from_transport(ssh.get_transport())
- sftp.put(
- tmpFile, tmpFile,
- )
-
- # run the provisioning script
- self._run_command(
- ssh, "sudo /bin/bash {}".format(tmpFile),
- )
-
- except paramiko.ssh_exception.AuthenticationException as e:
- raise e
- finally:
- os.remove(tmpFile)
- ssh.close()
projects / osm / N2VC.git / blobdiff