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#!/usr/bin/env python
#
# jose.lausuch@ericsson.com
# valentin.boucher@orange.com
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
#

import os
import os.path
import sys

# ----------------------------------------------------------
#
#               OPENSTACK UTILS
#
# -----------------------------------------------------------


# *********************************************
#   CREDENTIALS
# *********************************************
def check_credentials():
    """
    Check if the OpenStack credentials (openrc) are sourced
    """
    env_vars = ['OS_AUTH_URL', 'OS_USERNAME', 'OS_PASSWORD', 'OS_TENANT_NAME']
    return all(map(lambda v: v in os.environ and os.environ[v], env_vars))


def get_credentials(service):
    """Returns a creds dictionary filled with the following keys:
    * username
    * password/api_key (depending on the service)
    * tenant_name/project_id (depending on the service)
    * auth_url
    :param service: a string indicating the name of the service
                    requesting the credentials.
    """
    creds = {}
    # Unfortunately, each of the OpenStack client will request slightly
    # different entries in their credentials dict.
    if service.lower() in ("nova", "cinder"):
        password = "api_key"
        tenant = "project_id"
    else:
        password = "password"
        tenant = "tenant_name"

    # The most common way to pass these info to the script is to do it through
    # environment variables.
    creds.update({
        "username": os.environ.get('OS_USERNAME', "admin"),
        password: os.environ.get("OS_PASSWORD", 'admin'),
        "auth_url": os.environ.get("OS_AUTH_URL",
                                   "http://192.168.20.71:5000/v2.0"),
        tenant: os.environ.get("OS_TENANT_NAME", "admin"),
    })
    cacert = os.environ.get("OS_CACERT")
    if cacert is not None:
        # each openstack client uses differnt kwargs for this
        creds.update({"cacert": cacert,
                      "ca_cert": cacert,
                      "https_ca_cert": cacert,
                      "https_cacert": cacert,
                      "ca_file": cacert})
        creds.update({"insecure": "True", "https_insecure": "True"})
        if not os.path.isfile(cacert):
            print ("WARNING: The 'OS_CACERT' environment variable is " +
                   "set to %s but the file does not exist." % cacert)
    return creds


# *********************************************
#   NOVA
# *********************************************
def get_instances(nova_client):
    try:
        instances = nova_client.servers.list(search_opts={'all_tenants': 1})
        return instances
    except Exception, e:
        print "Error [get_instances(nova_client)]:", e
        return None


def get_instance_status(nova_client, instance):
    try:
        instance = nova_client.servers.get(instance.id)
        return instance.status
    except:
        # print ("Error [get_instance_status(nova_client, '%s')]:" %
        #        str(instance), e)
        return None


def get_instance_by_name(nova_client, instance_name):
    try:
        instance = nova_client.servers.find(name=instance_name)
        return instance
    except Exception, e:
        print ("Error [get_instance_by_name(nova_client, '%s')]:" %
               instance_name, e)
        return None


def get_flavor_id(nova_client, flavor_name):
    flavors = nova_client.flavors.list(detailed=True)
    id = ''
    for f in flavors:
        if f.name == flavor_name:
            id = f.id
            break
    return id


def get_flavor_id_by_ram_range(nova_client, min_ram, max_ram):
    flavors = nova_client.flavors.list(detailed=True)
    id = ''
    for f in flavors:
        if min_ram <= f.ram and f.ram <= max_ram:
            id = f.id
            break
    return id


def get_floating_ips(nova_client):
    try:
        floating_ips = nova_client.floating_ips.list()
        return floating_ips
    except Exception, e:
        print "Error [get_floating_ips(nova_client)]:", e
        return None


def create_flavor(nova_client, flavor_name, ram, disk, vcpus):
    try:
        flavor = nova_client.flavors.create(flavor_name, ram, vcpus, disk)
    except Exception, e:
        print ("Error [create_flavor(nova_client, '%s', '%s', '%s', "
               "'%s')]:" % (flavor_name, ram, disk, vcpus), e)
        return None
    return flavor.id


def create_floating_ip(neutron_client):
    extnet_id = get_external_net_id(neutron_client)
    props = {'floating_network_id': extnet_id}
    try:
        ip_json = neutron_client.create_floatingip({'floatingip': props})
        fip_addr = ip_json['floatingip']['floating_ip_address']
        fip_id = ip_json['floatingip']['id']
    except Exception, e:
        print "Error [create_floating_ip(neutron_client)]:", e
        return None
    return {'fip_addr': fip_addr, 'fip_id': fip_id}


def add_floating_ip(nova_client, server_id, floatingip_id):
    try:
        nova_client.servers.add_floating_ip(server_id, floatingip_id)
        return True
    except Exception, e:
        print ("Error [add_floating_ip(nova_client, '%s', '%s')]:" %
               (server_id, floatingip_id), e)
        return False


def delete_instance(nova_client, instance_id):
    try:
        nova_client.servers.force_delete(instance_id)
        return True
    except Exception, e:
        print "Error [delete_instance(nova_client, '%s')]:" % instance_id, e
        return False


def delete_floating_ip(nova_client, floatingip_id):
    try:
        nova_client.floating_ips.delete(floatingip_id)
        return True
    except Exception, e:
        print ("Error [delete_floating_ip(nova_client, '%s')]:" %
               floatingip_id, e)
        return False


# *********************************************
#   NEUTRON
# *********************************************
def get_network_list(neutron_client):
    network_list = neutron_client.list_networks()['networks']
    if len(network_list) == 0:
        return None
    else:
        return network_list


def get_router_list(neutron_client):
    router_list = neutron_client.list_routers()['routers']
    if len(router_list) == 0:
        return None
    else:
        return router_list


def get_port_list(neutron_client):
    port_list = neutron_client.list_ports()['ports']
    if len(port_list) == 0:
        return None
    else:
        return port_list


def get_network_id(neutron_client, network_name):
    networks = neutron_client.list_networks()['networks']
    id = ''
    for n in networks:
        if n['name'] == network_name:
            id = n['id']
            break
    return id


def get_subnet_id(neutron_client, subnet_name):
    subnets = neutron_client.list_subnets()['subnets']
    id = ''
    for s in subnets:
        if s['name'] == subnet_name:
            id = s['id']
            break
    return id


def get_router_id(neutron_client, router_name):
    routers = neutron_client.list_routers()['routers']
    id = ''
    for r in routers:
        if r['name'] == router_name:
            id = r['id']
            break
    return id


def get_private_net(neutron_client):
    # Checks if there is an existing shared private network
    networks = neutron_client.list_networks()['networks']
    if len(networks) == 0:
        return None
    for net in networks:
        if (net['router:external'] is False) and (net['shared'] is True):
            return net
    return None


def get_external_net(neutron_client):
    for network in neutron_client.list_networks()['networks']:
        if network['router:external']:
            return network['name']
    return False


def get_external_net_id(neutron_client):
    for network in neutron_client.list_networks()['networks']:
        if network['router:external']:
            return network['id']
    return False


def check_neutron_net(neutron_client, net_name):
    for network in neutron_client.list_networks()['networks']:
        if network['name'] == net_name:
            for subnet in network['subnets']:
                return True
    return False


def create_neutron_net(neutron_client, name):
    json_body = {'network': {'name': name,
                             'admin_state_up': True}}
    try:
        network = neutron_client.create_network(body=json_body)
        network_dict = network['network']
        return network_dict['id']
    except Exception, e:
        print "Error [create_neutron_net(neutron_client, '%s')]:" % name, e
        return False


def create_neutron_subnet(neutron_client, name, cidr, net_id):
    json_body = {'subnets': [{'name': name, 'cidr': cidr,
                              'ip_version': 4, 'network_id': net_id}]}
    try:
        subnet = neutron_client.create_subnet(body=json_body)
        return subnet['subnets'][0]['id']
    except Exception, e:
        print ("Error [create_neutron_subnet(neutron_client, '%s', '%s', "
               "'%s')]:" % (name, cidr, net_id), e)
        return False


def create_neutron_router(neutron_client, name):
    json_body = {'router': {'name': name, 'admin_state_up': True}}
    try:
        router = neutron_client.create_router(json_body)
        return router['router']['id']
    except Exception, e:
        print "Error [create_neutron_router(neutron_client, '%s')]:" % name, e
        return False


def create_neutron_port(neutron_client, name, network_id, ip):
    json_body = {'port': {
                 'admin_state_up': True,
                 'name': name,
                 'network_id': network_id,
                 'fixed_ips': [{"ip_address": ip}]
                 }}
    try:
        port = neutron_client.create_port(body=json_body)
        return port['port']['id']
    except Exception, e:
        print ("Error [create_neutron_port(neutron_client, '%s', '%s', "
               "'%s')]:" % (name, network_id, ip), e)
        return False


def update_neutron_net(neutron_client, network_id, shared=False):
    json_body = {'network': {'shared': shared}}
    try:
        neutron_client.update_network(network_id, body=json_body)
        return True
    except Exception, e:
        print ("Error [update_neutron_net(neutron_client, '%s', '%s')]:" %
               (network_id, str(shared)), e)
        return False


def update_neutron_port(neutron_client, port_id, device_owner):
    json_body = {'port': {
                 'device_owner': device_owner,
                 }}
    try:
        port = neutron_client.update_port(port=port_id,
                                          body=json_body)
        return port['port']['id']
    except Exception, e:
        print ("Error [update_neutron_port(neutron_client, '%s', '%s')]:" %
               (port_id, device_owner), e)
        return False


def add_interface_router(neutron_client, router_id, subnet_id):
    json_body = {"subnet_id": subnet_id}
    try:
        neutron_client.add_interface_router(router=router_id, body=json_body)
        return True
    except Exception, e:
        print ("Error [add_interface_router(neutron_client, '%s', '%s')]:" %
               (router_id, subnet_id), e)
        return False


def add_gateway_router(neutron_client, router_id):
    ext_net_id = get_external_net_id(neutron_client)
    router_dict = {'network_id': ext_net_id}
    try:
        neutron_client.add_gateway_router(router_id, router_dict)
        return True
    except Exception, e:
        print ("Error [add_gateway_router(neutron_client, '%s')]:" %
               router_id, e)
        return False


def delete_neutron_net(neutron_client, network_id):
    try:
        neutron_client.delete_network(network_id)
        return True
    except Exception, e:
        print ("Error [delete_neutron_net(neutron_client, '%s')]:" %
               network_id, e)
        return False


def delete_neutron_subnet(neutron_client, subnet_id):
    try:
        neutron_client.delete_subnet(subnet_id)
        return True
    except Exception, e:
        print ("Error [delete_neutron_subnet(neutron_client, '%s')]:" %
               subnet_id, e)
        return False


def delete_neutron_router(neutron_client, router_id):
    try:
        neutron_client.delete_router(router=router_id)
        return True
    except Exception, e:
        print ("Error [delete_neutron_router(neutron_client, '%s')]:" %
               router_id, e)
        return False


def delete_neutron_port(neutron_client, port_id):
    try:
        neutron_client.delete_port(port_id)
        return True
    except Exception, e:
        print "Error [delete_neutron_port(neutron_client, '%s')]:" % port_id, e
        return False


def remove_interface_router(neutron_client, router_id, subnet_id):
    json_body = {"subnet_id": subnet_id}
    try:
        neutron_client.remove_interface_router(router=router_id,
                                               body=json_body)
        return True
    except Exception, e:
        print ("Error [remove_interface_router(neutron_client, '%s', '%s')]:" %
               (router_id, subnet_id), e)
        return False


def remove_gateway_router(neutron_client, router_id):
    try:
        neutron_client.remove_gateway_router(router_id)
        return True
    except Exception, e:
        print ("Error [remove_gateway_router(neutron_client, '%s')]:" %
               router_id, e)
        return False


# *********************************************
#   SEC GROUPS
# *********************************************
def get_security_groups(neutron_client):
    try:
        security_groups = neutron_client.list_security_groups()[
            'security_groups']
        return security_groups
    except Exception, e:
        print "Error [get_security_groups(neutron_client)]:", e
        return None


def get_security_group_id(neutron_client, sg_name):
    security_groups = get_security_groups(neutron_client)
    id = ''
    for sg in security_groups:
        if sg['name'] == sg_name:
            id = sg['id']
            break
    return id


def create_security_group(neutron_client, sg_name, sg_description):
    json_body = {'security_group': {'name': sg_name,
                                    'description': sg_description}}
    try:
        secgroup = neutron_client.create_security_group(json_body)
        return secgroup['security_group']
    except Exception, e:
        print ("Error [create_security_group(neutron_client, '%s', '%s')]:" %
               (sg_name, sg_description), e)
        return False


def create_secgroup_rule(neutron_client, sg_id, direction, protocol,
                         port_range_min=None, port_range_max=None):
    if port_range_min is None and port_range_max is None:
        json_body = {'security_group_rule': {'direction': direction,
                                             'security_group_id': sg_id,
                                             'protocol': protocol}}
    elif port_range_min is not None and port_range_max is not None:
        json_body = {'security_group_rule': {'direction': direction,
                                             'security_group_id': sg_id,
                                             'port_range_min': port_range_min,
                                             'port_range_max': port_range_max,
                                             'protocol': protocol}}
    else:
        print ("Error [create_secgroup_rule(neutron_client, '%s', '%s', "
               "'%s', '%s', '%s', '%s')]:" % (neutron_client, sg_id, direction,
                                              port_range_min, port_range_max,
                                              protocol),
               " Invalid values for port_range_min, port_range_max")
        return False
    try:
        neutron_client.create_security_group_rule(json_body)
        return True
    except Exception, e:
        print ("Error [create_secgroup_rule(neutron_client, '%s', '%s', "
               "'%s', '%s', '%s', '%s')]:" % (neutron_client, sg_id, direction,
                                              port_range_min, port_range_max,
                                              protocol), e)
        return False


def add_secgroup_to_instance(nova_client, instance_id, secgroup_id):
    try:
        nova_client.servers.add_security_group(instance_id, secgroup_id)
        return True
    except Exception, e:
        print ("Error [add_secgroup_to_instance(nova_client, '%s', '%s')]: " %
               (instance_id, secgroup_id), e)
        return False


def update_sg_quota(neutron_client, tenant_id, sg_quota, sg_rule_quota):
    json_body = {"quota": {
        "security_group": sg_quota,
        "security_group_rule": sg_rule_quota
    }}

    try:
        neutron_client.update_quota(tenant_id=tenant_id,
                                    body=json_body)
        return True
    except Exception, e:
        print ("Error [update_sg_quota(neutron_client, '%s', '%s', "
               "'%s')]:" % (tenant_id, sg_quota, sg_rule_quota), e)
        return False


def delete_security_group(neutron_client, secgroup_id):
    try:
        neutron_client.delete_security_group(secgroup_id)
        return True
    except Exception, e:
        print ("Error [delete_security_group(neutron_client, '%s')]:" %
               secgroup_id, e)
        return False


# *********************************************
#   GLANCE
# *********************************************
def get_images(nova_client):
    try:
        images = nova_client.images.list()
        return images
    except Exception, e:
        print "Error [get_images]:", e
        return None


def get_image_id(glance_client, image_name):
    images = glance_client.images.list()
    id = ''
    for i in images:
        if i.name == image_name:
            id = i.id
            break
    return id


def create_glance_image(glance_client, image_name, file_path, public=True):
    if not os.path.isfile(file_path):
        print "Error: file " + file_path + " does not exist."
        return False
    try:
        with open(file_path) as fimage:
            image = glance_client.images.create(name=image_name,
                                                is_public=public,
                                                disk_format="qcow2",
                                                container_format="bare",
                                                data=fimage)
        return image.id
    except Exception, e:
        print ("Error [create_glance_image(glance_client, '%s', '%s', "
               "'%s')]:" % (image_name, file_path, str(public)), e)
        return False


def delete_glance_image(nova_client, image_id):
    try:
        nova_client.images.delete(image_id)
        return True
    except Exception, e:
        print ("Error [delete_glance_image(nova_client, '%s')]:" % image_id, e)
        return False


# *********************************************
#   CINDER
# *********************************************
def get_volumes(cinder_client):
    try:
        volumes = cinder_client.volumes.list(search_opts={'all_tenants': 1})
        return volumes
    except Exception, e:
        print "Error [get_volumes(cinder_client)]:", e
        return None


def list_volume_types(cinder_client, public=True, private=True):
    try:
        volume_types = cinder_client.volume_types.list()
        if not public:
            volume_types = [vt for vt in volume_types if not vt.is_public]
        if not private:
            volume_types = [vt for vt in volume_types if vt.is_public]
        return volume_types
    except Exception, e:
        print "Error [list_volume_types(cinder_client)]:", e
        return None


def create_volume_type(cinder_client, name):
    try:
        volume_type = cinder_client.volume_types.create(name)
        return volume_type
    except Exception, e:
        print "Error [create_volume_type(cinder_client, '%s')]:" % name, e
        return None


def update_cinder_quota(cinder_client, tenant_id, vols_quota,
                        snapshots_quota, gigabytes_quota):
    quotas_values = {"volumes": vols_quota,
                     "snapshots": snapshots_quota,
                     "gigabytes": gigabytes_quota}

    try:
        cinder_client.quotas.update(tenant_id, **quotas_values)
        return True
    except Exception, e:
        print ("Error [update_cinder_quota(cinder_client, '%s', '%s', '%s'"
               "'%s')]:" % (tenant_id, vols_quota,
                            snapshots_quota, gigabytes_quota), e)
        return False


def delete_volume(cinder_client, volume_id, forced=False):
    try:
        if forced:
            try:
                cinder_client.volumes.detach(volume_id)
            except:
                print "Error:", sys.exc_info()[0]
            cinder_client.volumes.force_delete(volume_id)
        else:
            cinder_client.volumes.delete(volume_id)
        return True
    except Exception, e:
        print ("Error [delete_volume(cinder_client, '%s', '%s')]:" %
               (volume_id, str(forced)), e)
        return False


def delete_volume_type(cinder_client, volume_type):
    try:
        cinder_client.volume_types.delete(volume_type)
        return True
    except Exception, e:
        print ("Error [delete_volume_type(cinder_client, '%s')]:" %
               volume_type, e)
        return False


# *********************************************
#   KEYSTONE
# *********************************************
def get_tenants(keystone_client):
    try:
        tenants = keystone_client.tenants.list()
        return tenants
    except Exception, e:
        print "Error [get_tenants(keystone_client)]:", e
        return None


def get_users(keystone_client):
    try:
        users = keystone_client.users.list()
        return users
    except Exception, e:
        print "Error [get_users(keystone_client)]:", e
        return None


def get_tenant_id(keystone_client, tenant_name):
    tenants = keystone_client.tenants.list()
    id = ''
    for t in tenants:
        if t.name == tenant_name:
            id = t.id
            break
    return id


def get_user_id(keystone_client, user_name):
    users = keystone_client.users.list()
    id = ''
    for u in users:
        if u.name == user_name:
            id = u.id
            break
    return id


def get_role_id(keystone_client, role_name):
    roles = keystone_client.roles.list()
    id = ''
    for r in roles:
        if r.name == role_name:
            id = r.id
            break
    return id


def create_tenant(keystone_client, tenant_name, tenant_description):
    try:
        tenant = keystone_client.tenants.create(tenant_name,
                                                tenant_description,
                                                enabled=True)
        return tenant.id
    except Exception, e:
        print ("Error [create_tenant(cinder_client, '%s', '%s')]:" %
               (tenant_name, tenant_description), e)
        return False


def create_user(keystone_client, user_name, user_password,
                user_email, tenant_id):
    try:
        user = keystone_client.users.create(user_name, user_password,
                                            user_email, tenant_id,
                                            enabled=True)
        return user.id
    except Exception, e:
        print ("Error [create_user(keystone_client, '%s', '%s', '%s'"
               "'%s')]:" % (user_name, user_password, user_email, tenant_id),
               e)
        return False


def add_role_user(keystone_client, user_id, role_id, tenant_id):
    try:
        keystone_client.roles.add_user_role(user_id, role_id, tenant_id)
        return True
    except Exception, e:
        print ("Error [add_role_user(keystone_client, '%s', '%s'"
               "'%s')]:" % (user_id, role_id, tenant_id), e)
        return False


def delete_tenant(keystone_client, tenant_id):
    try:
        keystone_client.tenants.delete(tenant_id)
        return True
    except Exception, e:
        print "Error [delete_tenant(keystone_client, '%s')]:" % tenant_id, e
        return False


def delete_user(keystone_client, user_id):
    try:
        keystone_client.users.delete(user_id)
        return True
    except Exception, e:
        print "Error [delete_user(keystone_client, '%s')]:" % user_id, e
        return False