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-rw-r--r--tests/functest/odl-sfc/README.sfc-test-211
-rwxr-xr-xtests/functest/odl-sfc/sfc-test2.py586
-rwxr-xr-xtests/functest/odl-sfc/sfc_tacker_test2.bash29
-rw-r--r--tests/functest/odl-sfc/test2-vnfd1.yaml31
-rw-r--r--tests/functest/odl-sfc/test2-vnfd2.yaml31
5 files changed, 688 insertions, 0 deletions
diff --git a/tests/functest/odl-sfc/README.sfc-test-2 b/tests/functest/odl-sfc/README.sfc-test-2
new file mode 100644
index 00000000..5a9f2ebe
--- /dev/null
+++ b/tests/functest/odl-sfc/README.sfc-test-2
@@ -0,0 +1,11 @@
+### ODL-SFC TEST2 DESCRIPTION ###
+
+This is a simple description of the test case
+
+We create one client and one server using nova. Then, 2 SFs are created using
+tacker. The SFs are deployed in two different compute nodes. A chain is created
+where both SFs are included.
+
+vxlan_tool is started in both SFs and HTTP traffic is sent from the client to
+the server. If it works, the vxlan_tool is modified to block HTTP traffic.
+It is tried again and it should fail because packets are dropped
diff --git a/tests/functest/odl-sfc/sfc-test2.py b/tests/functest/odl-sfc/sfc-test2.py
new file mode 100755
index 00000000..b954d0d4
--- /dev/null
+++ b/tests/functest/odl-sfc/sfc-test2.py
@@ -0,0 +1,586 @@
+import argparse
+import os
+import subprocess
+import sys
+import time
+import functest.utils.functest_logger as ft_logger
+import functest.utils.functest_utils as ft_utils
+import functest.utils.openstack_utils as os_utils
+import re
+import json
+import SSHUtils as ssh_utils
+import ovs_utils
+
+
+parser = argparse.ArgumentParser()
+
+parser.add_argument("-r", "--report",
+ help="Create json result file",
+ action="store_true")
+
+args = parser.parse_args()
+
+""" logging configuration """
+logger = ft_logger.Logger("ODL_SFC").getLogger()
+
+FUNCTEST_RESULTS_DIR = '/home/opnfv/functest/results/odl-sfc'
+FUNCTEST_REPO = ft_utils.FUNCTEST_REPO
+REPO_PATH = os.path.join(os.environ['repos_dir'], 'sfc/')
+CLIENT = "client"
+SERVER = "server"
+FLAVOR = "custom"
+IMAGE_NAME = "sf_nsh_colorado"
+IMAGE_FILENAME = "sf_nsh_colorado.qcow2"
+IMAGE_FORMAT = "qcow2"
+IMAGE_DIR = "/home/opnfv/functest/data"
+IMAGE_PATH = os.path.join(IMAGE_DIR, IMAGE_FILENAME)
+IMAGE_URL = "http://artifacts.opnfv.org/sfc/demo/" + IMAGE_FILENAME
+
+# NEUTRON Private Network parameters
+NET_NAME = "example-net"
+SUBNET_NAME = "example-subnet"
+SUBNET_CIDR = "11.0.0.0/24"
+ROUTER_NAME = "example-router"
+SECGROUP_NAME = "example-sg"
+SECGROUP_DESCR = "Example Security group"
+SFC_TEST_DIR = os.path.join(REPO_PATH, "tests/functest/odl-sfc/")
+TACKER_SCRIPT = os.path.join(SFC_TEST_DIR, "sfc_tacker_test2.bash")
+TACKER_VNFD1 = os.path.join(SFC_TEST_DIR, "test2-vnfd1.yaml")
+TACKER_VNFD2 = os.path.join(SFC_TEST_DIR, "test2-vnfd2.yaml")
+ssh_options = '-q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
+json_results = {"tests": 4, "failures": 0}
+
+PROXY = {
+ 'ip': '10.20.0.2',
+ 'username': 'root',
+ 'password': 'r00tme'
+}
+
+# run given command locally and return commands output if success
+
+
+def run_cmd(cmd, wdir=None, ignore_stderr=False, ignore_no_output=True):
+ pipe = subprocess.Popen(cmd, shell=True,
+ stdin=subprocess.PIPE,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE, cwd=wdir)
+
+ (output, errors) = pipe.communicate()
+ if output:
+ output = output.strip()
+ if pipe.returncode < 0:
+ logger.error(errors)
+ return False
+ if errors:
+ logger.error(errors)
+ if ignore_stderr:
+ return True
+ else:
+ return False
+
+ if ignore_no_output:
+ if not output:
+ return True
+
+ return output
+
+# run given command on OpenStack controller
+
+
+def run_cmd_on_cntlr(cmd):
+ ip_cntlrs = get_openstack_node_ips("controller")
+ if not ip_cntlrs:
+ return None
+
+ ssh_cmd = "ssh %s %s %s" % (ssh_options, ip_cntlrs[0], cmd)
+ return run_cmd_on_fm(ssh_cmd)
+
+# run given command on OpenStack Compute node
+
+
+def run_cmd_on_compute(cmd):
+ ip_computes = get_openstack_node_ips("compute")
+ if not ip_computes:
+ return None
+
+ ssh_cmd = "ssh %s %s %s" % (ssh_options, ip_computes[0], cmd)
+ return run_cmd_on_fm(ssh_cmd)
+
+# run given command on Fuel Master
+
+
+def run_cmd_on_fm(cmd, username="root", passwd="r00tme"):
+ ip = os.environ.get("INSTALLER_IP")
+ ssh_cmd = "sshpass -p %s ssh %s %s@%s %s" % (
+ passwd, ssh_options, username, ip, cmd)
+ return run_cmd(ssh_cmd)
+
+# run given command on Remote Machine, Can be VM
+
+
+def run_cmd_remote(ip, cmd, username="root", passwd="opnfv"):
+ ssh_opt_append = "%s -o ConnectTimeout=50 " % ssh_options
+ ssh_cmd = "sshpass -p %s ssh %s %s@%s %s" % (
+ passwd, ssh_opt_append, username, ip, cmd)
+ return run_cmd(ssh_cmd)
+
+# Get OpenStack Nodes IP Address
+
+
+def get_openstack_node_ips(role):
+ fuel_env = os.environ.get("FUEL_ENV")
+ if fuel_env is not None:
+ cmd = "fuel2 node list -f json -e %s" % fuel_env
+ else:
+ cmd = "fuel2 node list -f json"
+
+ nodes = run_cmd_on_fm(cmd)
+ ips = []
+ nodes = json.loads(nodes)
+ for node in nodes:
+ if role in node["roles"]:
+ ips.append(node["ip"])
+
+ return ips
+
+# Configures IPTABLES on OpenStack Controller
+
+
+def configure_iptables():
+ iptable_cmds = ["iptables -P INPUT ACCEPT",
+ "iptables -t nat -P INPUT ACCEPT",
+ "iptables -A INPUT -m state \
+ --state NEW,ESTABLISHED,RELATED -j ACCEPT"]
+
+ for cmd in iptable_cmds:
+ logger.info("Configuring %s on contoller" % cmd)
+ run_cmd_on_cntlr(cmd)
+
+ return
+
+
+def download_image():
+ if not os.path.isfile(IMAGE_PATH):
+ logger.info("Downloading image")
+ ft_utils.download_url(IMAGE_URL, IMAGE_DIR)
+
+ logger.info("Using old image")
+ return
+
+
+def setup_glance(glance_client):
+ image_id = os_utils.create_glance_image(glance_client,
+ IMAGE_NAME,
+ IMAGE_PATH,
+ disk=IMAGE_FORMAT,
+ container="bare",
+ public=True)
+
+ return image_id
+
+
+def setup_neutron(neutron_client):
+ n_dict = os_utils.create_network_full(neutron_client,
+ NET_NAME,
+ SUBNET_NAME,
+ ROUTER_NAME,
+ SUBNET_CIDR)
+ if not n_dict:
+ logger.error("failed to create neutron network")
+ sys.exit(-1)
+
+ network_id = n_dict["net_id"]
+ return network_id
+
+
+def setup_ingress_egress_secgroup(neutron_client, protocol,
+ min_port=None, max_port=None):
+ secgroups = os_utils.get_security_groups(neutron_client)
+ for sg in secgroups:
+ os_utils.create_secgroup_rule(neutron_client, sg['id'],
+ 'ingress', protocol,
+ port_range_min=min_port,
+ port_range_max=max_port)
+ os_utils.create_secgroup_rule(neutron_client, sg['id'],
+ 'egress', protocol,
+ port_range_min=min_port,
+ port_range_max=max_port)
+ return
+
+
+def setup_security_groups(neutron_client):
+ sg_id = os_utils.create_security_group_full(neutron_client,
+ SECGROUP_NAME, SECGROUP_DESCR)
+ setup_ingress_egress_secgroup(neutron_client, "icmp")
+ setup_ingress_egress_secgroup(neutron_client, "udp", 67, 68)
+ setup_ingress_egress_secgroup(neutron_client, "tcp", 22, 22)
+ setup_ingress_egress_secgroup(neutron_client, "tcp", 80, 80)
+ return sg_id
+
+
+# JIRA: SFC-52 new function
+def setup_availability_zones(nova_client):
+ computes = os_utils.get_hypervisors(nova_client)
+ az = ["nova::" + computes[0], "nova::" + computes[1]]
+ logger.debug("These are the availability zones %s" % az)
+ return az
+
+
+# JIRA: SFC-52 new function
+def modify_vnfd(tacker_vnfd, az):
+ try:
+ with open(tacker_vnfd, 'r') as stream:
+ lines = stream.readlines()
+ with open(tacker_vnfd, 'w') as stream:
+ for line in lines:
+ stream.write(re.sub('nova$', az, line))
+
+ except Exception, e:
+ logger.error("Problem when changing vnfd %s" % e)
+
+
+# JIRA: SFC-52 new function
+def prepare_tacker_vnfd(nova_client):
+ azs = setup_availability_zones(nova_client)
+ modify_vnfd(TACKER_VNFD1, azs[0])
+ modify_vnfd(TACKER_VNFD2, azs[1])
+
+
+def boot_instance(nova_client, name, flavor, image_id, network_id, sg_id,):
+ logger.info("Creating instance '%s'..." % name)
+ logger.debug(
+ "Configuration:\n name=%s \n flavor=%s \n image=%s \n "
+ "network=%s \n" % (name, flavor, image_id, network_id))
+
+ instance = os_utils.create_instance_and_wait_for_active(flavor,
+ image_id,
+ network_id,
+ name)
+
+ if instance is None:
+ logger.error("Error while booting instance.")
+ sys.exit(-1)
+
+ instance_ip = instance.networks.get(NET_NAME)[0]
+ logger.debug("Instance '%s' got private ip '%s'." %
+ (name, instance_ip))
+
+ logger.info("Adding '%s' to security group %s" % (name, SECGROUP_NAME))
+ os_utils.add_secgroup_to_instance(nova_client, instance.id, sg_id)
+
+ return instance_ip
+
+
+def ping(remote, pkt_cnt=1, iface=None, retries=100, timeout=None):
+ ping_cmd = 'ping'
+
+ if timeout:
+ ping_cmd = ping_cmd + ' -w %s' % timeout
+
+ grep_cmd = "grep -e 'packet loss' -e rtt"
+
+ if iface is not None:
+ ping_cmd = ping_cmd + ' -I %s' % iface
+
+ ping_cmd = ping_cmd + ' -i 0 -c %d %s' % (pkt_cnt, remote)
+ cmd = ping_cmd + '|' + grep_cmd
+
+ while retries > 0:
+ output = run_cmd(cmd)
+ if not output:
+ return False
+
+ match = re.search('(\d*)% packet loss', output)
+ if not match:
+ return False
+
+ packet_loss = int(match.group(1))
+ if packet_loss == 0:
+ return True
+
+ retries = retries - 1
+
+ return False
+
+
+def get_floating_ips(nova_client, neutron_client):
+ ips = []
+ instances = nova_client.servers.list(search_opts={'all_tenants': 1})
+ for instance in instances:
+ floatip_dic = os_utils.create_floating_ip(neutron_client)
+ floatip = floatip_dic['fip_addr']
+ instance.add_floating_ip(floatip)
+ logger.info("Instance name and ip %s:%s " % (instance.name, floatip))
+ logger.info("Waiting for instance %s:%s to come up" %
+ (instance.name, floatip))
+ if not ping(floatip):
+ logger.info("Instance %s:%s didn't come up" %
+ (instance.name, floatip))
+ sys.exit(1)
+
+ if instance.name == "server":
+ logger.info("Server:%s is reachable" % floatip)
+ server_ip = floatip
+ elif instance.name == "client":
+ logger.info("Client:%s is reachable" % floatip)
+ client_ip = floatip
+ else:
+ logger.info("SF:%s is reachable" % floatip)
+ ips.append(floatip)
+
+ return server_ip, client_ip, ips[1], ips[0]
+
+# Start http server on a give machine, Can be VM
+
+
+def start_http_server(ip):
+ cmd = "\'python -m SimpleHTTPServer 80"
+ cmd = cmd + " > /dev/null 2>&1 &\'"
+ return run_cmd_remote(ip, cmd)
+
+# Set firewall using vxlan_tool.py on a give machine, Can be VM
+
+
+def vxlan_firewall(sf, iface="eth0", port="22", block=True):
+ cmd = "python vxlan_tool.py"
+ cmd = cmd + " -i " + iface + " -d forward -v off"
+ if block:
+ cmd = "python vxlan_tool.py -i eth0 -d forward -v off -b " + port
+
+ cmd = "sh -c 'cd /root;nohup " + cmd + " > /dev/null 2>&1 &'"
+ run_cmd_remote(sf, cmd)
+
+# Stop the vxlan_tool process if it was working
+
+
+# JIRA: SFC-52 added function
+def vxlan_tool_stop(sf):
+ cmd = "pkill -f vxlan_tool.py"
+ run_cmd_remote(sf, cmd)
+
+# Run netcat on a give machine, Can be VM
+
+
+def netcat(s_ip, c_ip, port="80", timeout=5):
+ cmd = "nc -zv "
+ cmd = cmd + " -w %s %s %s" % (timeout, s_ip, port)
+ cmd = cmd + " 2>&1"
+ output = run_cmd_remote(c_ip, cmd)
+ logger.info("%s" % output)
+ return output
+
+
+def is_ssh_blocked(srv_prv_ip, client_ip):
+ res = netcat(srv_prv_ip, client_ip, port="22")
+ match = re.search("nc:.*timed out:.*", res, re.M)
+ if match:
+ return True
+
+ return False
+
+
+def is_http_blocked(srv_prv_ip, client_ip):
+ res = netcat(srv_prv_ip, client_ip, port="80")
+ match = re.search(".* 80 port.* succeeded!", res, re.M)
+ if match:
+ return False
+
+ return True
+
+
+def capture_err_logs(controller_clients, compute_clients, error):
+ ovs_logger = ovs_utils.OVSLogger(
+ os.path.join(os.getcwd(), 'ovs-logs'),
+ FUNCTEST_RESULTS_DIR)
+
+ timestamp = time.strftime("%Y%m%d-%H%M%S")
+ ovs_logger.dump_ovs_logs(controller_clients,
+ compute_clients,
+ related_error=error,
+ timestamp=timestamp)
+ return
+
+
+def update_json_results(name, result):
+ json_results.update({name: result})
+ if result is not "Passed":
+ json_results["failures"] += 1
+
+ return
+
+
+def get_ssh_clients(role):
+ clients = []
+ for ip in get_openstack_node_ips(role):
+ s_client = ssh_utils.get_ssh_client(ip,
+ 'root',
+ proxy=PROXY)
+ clients.append(s_client)
+
+ return clients
+
+# Check SSH connectivity to VNFs
+
+
+def check_ssh(ips, retries=100):
+ check = [False, False]
+ logger.info("Checking SSH connectivity to the SFs with ips %s" % str(ips))
+ while retries and not all(check):
+ for index, ip in enumerate(ips):
+ check[index] = run_cmd_remote(ip, "exit")
+
+ if all(check):
+ logger.info("SSH connectivity to the SFs established")
+ return True
+
+ time.sleep(3)
+ retries -= 1
+
+ return False
+
+# Measure the time it takes to update the classification rules
+
+
+def capture_time_log(compute_clients):
+ ovs_logger = ovs_utils.OVSLogger(
+ os.path.join(os.getcwd(), 'ovs-logs'),
+ "test")
+ i = 0
+ first_RSP = ""
+ start_time = time.time()
+ while True:
+ rsps = ovs_logger.ofctl_time_counter(compute_clients[0])
+ if not i:
+ if len(rsps) > 0:
+ first_RSP = rsps[0]
+ i = i + 1
+ else:
+ first_RSP = 0
+ i = i + 1
+ if (len(rsps) > 1):
+ if(first_RSP != rsps[0]):
+ if (rsps[0] == rsps[1]):
+ stop_time = time.time()
+ logger.info("classification rules updated")
+ difference = stop_time - start_time
+ logger.info("It took %s seconds" % difference)
+ break
+ time.sleep(1)
+ return
+
+
+def main():
+ installer_type = os.environ.get("INSTALLER_TYPE")
+ if installer_type != "fuel":
+ logger.error(
+ '\033[91mCurrently supported only Fuel Installer type\033[0m')
+ sys.exit(1)
+
+ installer_ip = os.environ.get("INSTALLER_IP")
+ if not installer_ip:
+ logger.error(
+ '\033[91minstaller ip is not set\033[0m')
+ logger.error(
+ '\033[91mexport INSTALLER_IP=<ip>\033[0m')
+ sys.exit(1)
+
+ start_time = time.time()
+ status = "PASS"
+ configure_iptables()
+ download_image()
+ _, custom_flv_id = os_utils.get_or_create_flavor(
+ FLAVOR, 1500, 10, 1, public=True)
+ if not custom_flv_id:
+ logger.error("Failed to create custom flavor")
+ sys.exit(1)
+
+ glance_client = os_utils.get_glance_client()
+ neutron_client = os_utils.get_neutron_client()
+ nova_client = os_utils.get_nova_client()
+
+ controller_clients = get_ssh_clients("controller")
+ compute_clients = get_ssh_clients("compute")
+
+ image_id = setup_glance(glance_client)
+ network_id = setup_neutron(neutron_client)
+ sg_id = setup_security_groups(neutron_client)
+ prepare_tacker_vnfd(nova_client)
+
+ boot_instance(
+ nova_client, CLIENT, FLAVOR, image_id, network_id, sg_id,)
+ srv_prv_ip = boot_instance(
+ nova_client, SERVER, FLAVOR, image_id, network_id, sg_id,)
+
+ subprocess.call(TACKER_SCRIPT, shell=True)
+
+ server_ip, client_ip, sf1, sf2 = get_floating_ips(
+ nova_client, neutron_client)
+
+ if not check_ssh([sf1, sf2]):
+ logger.error("Cannot establish SSH connection to the SFs")
+ sys.exit(1)
+
+ logger.info("Starting HTTP server on %s" % server_ip)
+ if not start_http_server(server_ip):
+ logger.error(
+ '\033[91mFailed to start HTTP server on %s\033[0m' % server_ip)
+ sys.exit(1)
+
+ logger.info("Starting vxlan_tool on %s" % sf2)
+ vxlan_firewall(sf2, block=False)
+ logger.info("Starting vxlan_tool on %s" % sf1)
+ vxlan_firewall(sf1, block=False)
+
+ logger.info("Wait for ODL to update the classification rules in OVS")
+ time.sleep(100)
+
+ logger.info("Test HTTP")
+ if not is_http_blocked(srv_prv_ip, client_ip):
+ logger.info('\033[92mTEST 1 [PASSED] ==> HTTP WORKS\033[0m')
+ update_json_results("Test 1: HTTP works", "Passed")
+ else:
+ error = ('\033[91mTEST 1 [FAILED] ==> HTTP BLOCKED\033[0m')
+ logger.error(error)
+ capture_err_logs(controller_clients, compute_clients, error)
+ update_json_results("Test 1: HTTP works", "Failed")
+
+ logger.info("Changing the vxlan_tool to block HTTP traffic")
+
+ # Make SF1 block now http traffic
+ vxlan_tool_stop(sf1)
+ vxlan_firewall(sf1, port="80")
+
+ logger.info("Test HTTP")
+ if is_http_blocked(srv_prv_ip, client_ip):
+ logger.info('\033[92mTEST 2 [PASSED] ==> HTTP Blocked\033[0m')
+ update_json_results("Test 2: HTTP Blocked", "Passed")
+ else:
+ error = ('\033[91mTEST 2 [FAILED] ==> HTTP WORKS\033[0m')
+ logger.error(error)
+ capture_err_logs(controller_clients, compute_clients, error)
+ update_json_results("Test 2: HTTP Blocked", "Failed")
+
+ if json_results["failures"]:
+ status = "FAIL"
+ logger.error('\033[91mSFC TESTS: %s :( FOUND %s FAIL \033[0m' % (
+ status, json_results["failures"]))
+
+ if args.report:
+ stop_time = time.time()
+ logger.debug("Promise Results json: " + str(json_results))
+ ft_utils.push_results_to_db("sfc",
+ "sfc_one_chain_two_service_functions"
+ "_different_computes",
+ start_time,
+ stop_time,
+ status,
+ json_results)
+
+ if status == "PASS":
+ logger.info('\033[92mSFC ALL TESTS: %s :)\033[0m' % status)
+ sys.exit(0)
+
+ sys.exit(1)
+
+if __name__ == '__main__':
+ main()
diff --git a/tests/functest/odl-sfc/sfc_tacker_test2.bash b/tests/functest/odl-sfc/sfc_tacker_test2.bash
new file mode 100755
index 00000000..04e6506e
--- /dev/null
+++ b/tests/functest/odl-sfc/sfc_tacker_test2.bash
@@ -0,0 +1,29 @@
+#!/bin/bash
+BASEDIR=`dirname $0`
+
+#import VNF descriptor
+tacker vnfd-create --vnfd-file ${BASEDIR}/test2-vnfd1.yaml
+tacker vnfd-create --vnfd-file ${BASEDIR}/test2-vnfd2.yaml
+
+#create instances of the imported VNF
+tacker vnf-create --name testVNF1 --vnfd-name test-vnfd1
+tacker vnf-create --name testVNF2 --vnfd-name test-vnfd2
+
+key=true
+while $key;do
+ sleep 3
+ active=`tacker vnf-list | grep -E 'PENDING|ERROR'`
+ echo -e "checking if SFs are up: $active"
+ if [ -z "$active" ]; then
+ key=false
+ fi
+done
+
+#create service chain
+tacker sfc-create --name red --chain testVNF1,testVNF2
+
+#create classifier
+tacker sfc-classifier-create --name red_http --chain red --match source_port=0,dest_port=80,protocol=6
+
+tacker sfc-list
+tacker sfc-classifier-list
diff --git a/tests/functest/odl-sfc/test2-vnfd1.yaml b/tests/functest/odl-sfc/test2-vnfd1.yaml
new file mode 100644
index 00000000..5c672e38
--- /dev/null
+++ b/tests/functest/odl-sfc/test2-vnfd1.yaml
@@ -0,0 +1,31 @@
+template_name: test-vnfd1
+description: firewall1-example
+
+service_properties:
+ Id: firewall1-vnfd
+ vendor: tacker
+ version: 1
+ type:
+ - firewall1
+vdus:
+ vdu1:
+ id: vdu1
+ vm_image: sf_nsh_colorado
+ instance_type: custom
+ service_type: firewall1
+
+ network_interfaces:
+ management:
+ network: example-net
+ management: true
+
+ placement_policy:
+ availability_zone: nova
+
+ auto-scaling: noop
+ monitoring_policy: noop
+ failure_policy: respawn
+
+ config:
+ param0: key0
+ param1: key1
diff --git a/tests/functest/odl-sfc/test2-vnfd2.yaml b/tests/functest/odl-sfc/test2-vnfd2.yaml
new file mode 100644
index 00000000..8a570ab9
--- /dev/null
+++ b/tests/functest/odl-sfc/test2-vnfd2.yaml
@@ -0,0 +1,31 @@
+template_name: test-vnfd2
+description: firewall2-example
+
+service_properties:
+ Id: firewall2-vnfd
+ vendor: tacker
+ version: 1
+ type:
+ - firewall2
+vdus:
+ vdu1:
+ id: vdu1
+ vm_image: sf_nsh_colorado
+ instance_type: custom
+ service_type: firewall2
+
+ network_interfaces:
+ management:
+ network: example-net
+ management: true
+
+ placement_policy:
+ availability_zone: nova
+
+ auto-scaling: noop
+ monitoring_policy: noop
+ failure_policy: respawn
+
+ config:
+ param0: key0
+ param1: key1