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progetti:cloud-areapd:ced-c:install_and_configure_compute_nodes_draft [2015/10/14 13:09] – [Mute neutron-openvswitch-agent eccessive logging] mazzon@infn.itprogetti:cloud-areapd:ced-c:install_and_configure_compute_nodes_draft [2015/10/30 12:33] (current) – [Configure Neutron's agents] sella@infn.it
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 +======= Installation and Configuration of OpenStack Compute Node =======
  
 +Author:
 +   * Paolo E. Mazzon (DEI)
 +   * Matteo Menguzzato (DFA)
 +   * Gianpietro Sella (DISC)
 +===== Prerequisites =====
 +   * [[http://wiki.infn.it/progetti/cloud-areapd/ced-c/controller_and_network_node|Controller node install & setup]]
 +
 +At least one node with:
 +   * Updated CentOS 7 (7.1)
 +   * Make sure that yum autoupdate is disabled
 +<code bash>
 +[root@cld-blu-11 ~]# grep ENA /etc/sysconfig/yum-autoupdate
 +# ENABLED
 +ENABLED="false"
 +</code> 
 +   * At least 20GB HD for operating system and OpenStack software and related log files 
 +   * Dedicated storage mounted on ''/var/lib/nova/instances'' where to store the instance images (particularly important to get live migration).
 +   * SELinux configured as "Disabled" (''/etc/selinux/config'')
 +   * EPEL 7
 +   * A MySQL (possibly a HA cluster) endpoint each OpenStack service can connect to (in this guide we're using our MySQL Percona cluster's IP 192.168.60.180)
 +   * A HAProxy/Keepalived cluster to use for load-balancing and Virtual IP (in this guide we're using the IP 192.168.60.180 for mgmt net and 90.147.143.10 for public net)
 +   * Disable NetworkManager
 +   * Installed CA INFN certificate on both nodes
 +   * add user "nova" to group "disk" and reboot node
 +<code bash>
 +[root@cld-blu-11 ~]# ll /etc/grid-security/chain.pem
 +-rw-r--r-- 1 root root 5607  9 apr 19.01 chain.pem
 +</code>
 +   * Installed and active libvirt
 +<code bash>
 +yum -y install libvirt
 +systemctl start libvirtd
 +systemctl enable libvirtd
 +</code>
 +   * Activated virtualization on CPU (can be toggled in the BIOS menu):
 +<code bash>
 +cat /proc/cpuinfo | grep vmx
 +flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 lahf_lm dts tpr_shadow vnmi flexpriority
 +
 +lsmod |grep kvm
 +kvm_intel              54285  12 
 +kvm                   332980  1 kvm_intel
 +
 +lscpu |grep -i virtu
 +Virtualization:        VT-x
 +
 +</code>
 +Note: ''kvm_intel'' can be substituted by ''kvm_amd'', and ''VT-x'' can be substituted by ''AMD-V''.
 +===== Naming conventions and networking assumptions =====
 +We assume that the compute node has the following network setup:
 +   * It has two network interface connected to two different networks: **management network** and **data network**
 +   * **Management network** is: ''192.168.60.0/24''
 +   * **Data network** is: ''192.168.61.0/24''
 +   * Node's IP are: ''192.168.60.XYZ'' and ''192.168.61.XYZ''
 +
 +==== Further pre-requisite on data network interface ====
 +In the net-interface configuration script for data network (something like ''/etc/sysconfig/network-scripts/ifcfg-ethX'') put the following parameter:
 +<code bash>
 +MTU="9000"
 +</code>
 +===== IPTables configuration =====
 +Execute the following commands:
 +<code bash>
 +while read i
 +do
 +   firewall-cmd --add-port=${i}/tcp
 +   firewall-cmd --permanent --add-port=${i}/tcp
 +done << EOF
 +5900-5999
 +16509
 +49152-49261
 +EOF
 +
 +# 5900-5999    VNC's TCP ports
 +# 16509        libvirtd's TCP ports
 +# 49152-49261  libvirtd's ephemeral ports
 +
 +# permit ntpd's udp communications
 +firewall-cmd --add-port=123/udp
 +firewall-cmd --permanent --add-port=123/udp
 +firewall-cmd --permanent --direct --add-rule ipv4 filter INPUT 0 -p gre -j ACCEPT
 +</code>
 +===== Naming conventions and networking assumptions =====
 +We assume that the compute node has the following setup:
 +   * It has 2 network interfaces connected to two different networks: **management network**, **Data network**
 +   * **Management network** is: ''192.168.60.0/24''
 +   * **Data network** is: 192.168.61.0/24
 +   * The node is named: ''cld-blu-NN.cloud.pd.infn.it'' (''192.168.60.XYZ'', ''192.168.61.XYZ'')
 +   * In this guide the controller's VIP on the management network is needed: ''192.168.60.180''
 +   * In this guide the MySQL cluster's VIP on the management network is needed: ''192.168.60.180''
 +   * In this guide the controller's public IP is needed: ''90.147.143.10''
 +===== Install software =====
 +Install repo and Nova and Neutron's packages, and update ''iproute'' to support network namespaces:
 +<code bash>
 +yum -y install https://repos.fedorapeople.org/repos/openstack/EOL/openstack-icehouse/rdo-release-icehouse-4.noarch.rpm
 +yum -y install openstack-nova-compute openstack-utils openstack-neutron-openvswitch openstack-neutron-ml2 sysfsutils
 +yum -y update iproute
 +</code>
 +
 +
 +===== Preliminary networking setup =====
 +<code bash>
 +sed -i 's+^net\.ipv4\.conf\.default\.rp_filter+#net\.ipv4\.conf\.default\.rp_filter+' /etc/sysctl.conf
 +sed -i 's+^net\.ipv4\.conf\.all\.rp_filter+#net\.ipv4\.conf\.all\.rp_filter+' /etc/sysctl.conf
 +cat << EOF >> /etc/sysctl.conf
 +net.ipv4.conf.all.rp_filter=0
 +net.ipv4.conf.default.rp_filter=0
 +net.bridge.bridge-nf-call-arptables=1
 +net.bridge.bridge-nf-call-iptables=1
 +net.bridge.bridge-nf-call-ip6tables=1
 +EOF
 +sysctl -p
 +systemctl restart network
 +</code>
 +===== Configure Nova =====
 +**nova.conf**
 +<code bash>
 +openstack-config --set /etc/nova/nova.conf database connection "mysql://nova:<NOVA_DB_PASS>@192.168.60.180:5306/nova"
 +openstack-config --set /etc/nova/nova.conf DEFAULT auth_strategy keystone
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_host 192.168.60.180
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_protocol http
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_port 35357
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_user nova
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_tenant_name services
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_password NOVA_PASS
 +openstack-config --set /etc/nova/nova.conf DEFAULT rpc_backend nova.openstack.common.rpc.impl_kombu
 +openstack-config --set /etc/nova/nova.conf DEFAULT rabbit_hosts 192.168.60.152:5672,192.168.60.153:5672
 +openstack-config --set /etc/nova/nova.conf libvirt live_migration_flag VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE
 + 
 +# Change the following IP with the actual IP of the current compute node on the management network
 +openstack-config --set /etc/nova/nova.conf DEFAULT my_ip 192.168.60.XYZ
 +openstack-config --set /etc/nova/nova.conf DEFAULT vnc_enabled True
 +# vncserver_listen MUST be 0.0.0.0 otherwise the live migration won't work correctly
 +# (http://docs.openstack.org/havana/config-reference/content/configuring-openstack-compute-basics.html#setting-flags-in-nova-conf-file)
 +openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_listen 0.0.0.0
 + 
 +# Change the following IP with the actual IP of the current compute node on the management network
 +openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_proxyclient_address 192.168.60.XYZ
 +openstack-config --set /etc/nova/nova.conf DEFAULT novncproxy_base_url http://90.147.143.10:6080/vnc_auto.html
 +openstack-config --set /etc/nova/nova.conf DEFAULT glance_host 192.168.60.180
 +openstack-config --set /etc/nova/nova.conf DEFAULT compute_driver nova.virt.libvirt.LibvirtDriver
 +openstack-config --set /etc/nova/nova.conf DEFAULT api_paste_config /etc/nova/api-paste.ini
 +openstack-config --set /etc/nova/nova.conf DEFAULT network_api_class nova.network.neutronv2.api.API
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_url http://192.168.60.180:9696
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_auth_strategy keystone
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_admin_tenant_name services
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_admin_username neutron
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_admin_password NEUTRON_PASS
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_admin_auth_url http://192.168.60.180:35357/v2.0
 +openstack-config --set /etc/nova/nova.conf DEFAULT linuxnet_interface_driver nova.network.linux_net.LinuxOVSInterfaceDriver
 +openstack-config --set /etc/nova/nova.conf DEFAULT security_group_api neutron
 +openstack-config --set /etc/nova/nova.conf DEFAULT firewall_driver nova.virt.firewall.NoopFirewallDriver
 +# the following 3 lines enable admin's password inject
 +openstack-config --set /etc/nova/nova.conf libvirt inject_password true
 +openstack-config --set /etc/nova/nova.conf libvirt inject_key true
 +openstack-config --set /etc/nova/nova.conf libvirt inject_partition -1
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_metadata_proxy_shared_secret METADATA_PASS
 +openstack-config --set /etc/nova/nova.conf DEFAULT rabbit_ha_queues True
 +openstack-config --set /etc/nova/nova.conf DEFAULT cpu_allocation_ratio 4.0
 +openstack-config --set /etc/nova/nova.conf DEFAULT allow_resize_to_same_host true
 + 
 + 
 +# this is a temporary workaround untill we understand a problem of cpu not compatible when live-migrating VMs
 +openstack-config --set /etc/nova/nova.conf libvirt cpu_mode custom
 +openstack-config --set /etc/nova/nova.conf libvirt cpu_model kvm64
 +
 +</code>
 +**api-paste.ini**
 +<code bash>
 +while read i
 +do
 +   openstack-config --set /etc/nova/api-paste.ini ${i}
 +done << EOF
 +filter:authtoken paste.filter_factory keystoneclient.middleware.auth_token:filter_factory
 +filter:authtoken auth_host 192.168.60.180
 +filter:authtoken auth_uri http://192.168.60.180:5000
 +filter:authtoken admin_tenant_name services
 +filter:authtoken admin_user nova
 +filter:authtoken admin_password NOVA_PASS
 +EOF
 +</code>
 +
 +
 +===== Configure LibVirt to support Live Migration =====
 +Turn OFF the ''libvirtd'' daemon :
 +<code bash>
 +systemctl stop libvirtd
 +</code>
 +Execute:
 +<code bash>
 +cat << EOF >> /etc/libvirt/libvirtd.conf
 +listen_tls = 0
 +listen_tcp = 1
 +auth_tcp = "none"
 +EOF
 +</code>
 +and
 +<code bash>
 +cat << EOF >> /etc/sysconfig/libvirtd
 +LIBVIRTD_ARGS="--listen"
 +EOF
 +</code>
 +Modify ''qemu.conf'':
 +<code bash>
 +cat << EOF >> /etc/libvirt/qemu.conf 
 +user="nova"
 +group="nova"
 +dynamic_ownership = 0
 +EOF
 +</code>
 +===== Configure Neutron's agents =====
 +As in the compute node the Neutron's L2 agent is running, some Neutron's configuration files need to be customized.
 +
 +**neutron.conf**
 +<code bash>
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT core_plugin ml2
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT service_plugins router
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT api_paste_config /etc/neutron/api-paste.ini
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT rpc_backend neutron.openstack.common.rpc.impl_kombu
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_hosts 192.168.60.152:5672,192.168.60.153:5672
 +openstack-config --set /etc/neutron/neutron.conf keystone_authtoken auth_host 192.168.60.180
 +openstack-config --set /etc/neutron/neutron.conf keystone_authtoken admin_user neutron
 +openstack-config --set /etc/neutron/neutron.conf keystone_authtoken admin_password NEUTRON_PASS
 +openstack-config --set /etc/neutron/neutron.conf keystone_authtoken auth_url http://192.168.60.180:35357/v2.0
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT auth_strategy keystone
 +openstack-config --set /etc/neutron/neutron.conf keystone_authtoken admin_tenant_name services
 +openstack-config --set /etc/neutron/neutron.conf agent root_helper "sudo neutron-rootwrap /etc/neutron/rootwrap.conf"
 +openstack-config --set /etc/neutron/neutron.conf database connection "mysql://neutron:<NEUTRON_DB_PWD>@192.168.60.180:4306/neutron"
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT dhcp_agents_per_network 2
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT dhcp_lease_duration 86400
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT rabbit_ha_queues True
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT agent_down_time 75 
 +openstack-config --set /etc/neutron/neutron.conf agent report_interval 30 
 +openstack-config --set /etc/neutron/neutron.conf filter:authtoken auth_port 35357
 +</code>
 +
 +**ml2_conf.ini**
 +
 +for local_ip parameter use the correct value
 +<code bash>
 +while read i
 +do
 +   openstack-config --set /etc/neutron/plugins/ml2/ml2_conf.ini ${i}
 +done << EOF
 +ml2 type_drivers gre
 +ml2 tenant_network_types gre
 +ml2 mechanism_drivers openvswitch
 +ml2_type_gre tunnel_id_ranges 1:1000
 +securitygroup firewall_driver neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
 +securitygroup enable_security_group True
 +ovs tenant_network_type gre
 +ovs tunnel_id_ranges 1:1000
 +ovs local_ip 192.168.61.XYZ
 +ovs enable_tunneling True
 +ovs integration_bridge br-int
 +ovs tunnel_bridge br-tun
 +EOF
 +
 +ln -s /etc/neutron/plugins/ml2/ml2_conf.ini /etc/neutron/plugin.ini
 +</code>
 +(Neutron L2 agent's) **api-paste.ini**
 +<code bash>
 +openstack-config --set /etc/neutron/api-paste.ini filter:authtoken paste.filter_factory keystoneclient.middleware.auth_token:filter_factory
 +openstack-config --set /etc/neutron/api-paste.ini filter:authtoken auth_host 192.168.60.180
 +openstack-config --set /etc/neutron/api-paste.ini filter:authtoken admin_tenant_name services 
 +openstack-config --set /etc/neutron/api-paste.ini filter:authtoken admin_user neutron 
 +openstack-config --set /etc/neutron/api-paste.ini filter:authtoken admin_password NEUTRON_PASS
 +</code>
 +===== Bridge creation and start of the services =====
 +Open vSwitch start and bridge creation
 +<code bash>
 +systemctl start openvswitch
 +systemctl enable openvswitch
 +ovs-vsctl add-br br-int
 +</code>
 +L2 Agent configuration:
 +<code bash>
 +sed -i 's,plugins/openvswitch/ovs_neutron_plugin.ini,plugin.ini,g' /usr/lib/systemd/system/neutron-openvswitch-agent.service
 +systemctl daemon-reload
 +</code>
 +Mute neutron-openvswitch-agent eccessive logging:
 +
 +The openvswitch service execs every two seconds the command ''ovs-ofctl dump-flows br-int table=22'' through ''sudo''. The execution of the command itself produces 43200 entries a day in ''/var/log/secure''. To mute the logging we add the ''!syslog'' directive to ''/etc/sudoers.d/neutron'' file:
 +<code bash>
 +sed -i 's/Defaults:neutron !requiretty$/Defaults:neutron !requiretty, !syslog/' /etc/sudoers.d/neutron
 +</code>
 +Start all the services:
 +<code bash>
 +systemctl start neutron-openvswitch-agent
 +systemctl enable neutron-openvswitch-agent
 +systemctl start libvirtd
 +systemctl start messagebus
 +systemctl start openstack-nova-compute
 +systemctl enable openstack-nova-compute
 +</code>
 +===== Check all =====
 +When done, log into the controller node, or wherever you've installed the Openstack CLI and copied the ''keystone_admin.sh'' into (which was created in the [[http://wiki.infn.it/progetti/cloud-areapd/keystone-glance_high_availability/openstack_ha/controller_node|controller node]] installation procedure). Execute the commands:
 +<code bash>
 +[root@cld-blu-03 ~]# neutron agent-list
 +
 ++--------------------------------------+--------------------+-----------------------------+-------+----------------+
 +| id                                   | agent_type         | host                        | alive | admin_state_up |
 ++--------------------------------------+--------------------+-----------------------------+-------+----------------+
 +| 22cf4da6-3925-4a31-ba95-73e3332b1a36 | Open vSwitch agent | cld-blu-NN.cloud.pd.infn.it | :-)   | True           |
 +| 2d6aed8f-5a6d-46b1-8ce8-c07f4022d1d5 | DHCP agent         | cld-blu-03.cloud.pd.infn.it | :-)   | True           |
 +| 4d01a60a-b25c-4530-9860-c37490069e5e | Metadata agent     | cld-blu-03.cloud.pd.infn.it | :-)   | True           |
 +| 662f5529-675a-41e8-9490-4f0149edb6ce | Open vSwitch agent | cld-blu-03.cloud.pd.infn.it | :-)   | True           |
 +| c4c512b8-68cc-4deb-8451-d4c3d827809c | L3 agent           | cld-blu-03.cloud.pd.infn.it | :-)   | True           |
 ++--------------------------------------+--------------------+-----------------------------+-------+----------------+
 +
 +
 +[root@cld-blu-03 ~]# nova service-list
 ++------------------+-----------------------------+----------+---------+-------+----------------------------+-----------------+
 +| Binary           | Host                        | Zone     | Status  | State | Updated_at                 | Disabled Reason |
 ++------------------+-----------------------------+----------+---------+-------+----------------------------+-----------------+
 +| nova-consoleauth | cld-blu-03.cloud.pd.infn.it | internal | enabled | up    | 2015-03-27T10:26:58.000000 | -               |
 +| nova-conductor   | cld-blu-03.cloud.pd.infn.it | internal | enabled | up    | 2015-03-27T10:26:58.000000 | -               |
 +| nova-scheduler   | cld-blu-03.cloud.pd.infn.it | internal | enabled | up    | 2015-03-27T10:27:00.000000 | -               |
 +| nova-cert        | cld-blu-03.cloud.pd.infn.it | internal | enabled | up    | 2015-03-27T10:26:58.000000 | -               |
 +| nova-cert        | cld-blu-04.cloud.pd.infn.it | internal | enabled | up    | 2015-03-27T10:26:58.000000 | -               |
 +| nova-consoleauth | cld-blu-04.cloud.pd.infn.it | internal | enabled | up    | 2015-03-27T10:26:56.000000 | -               |
 +| nova-scheduler   | cld-blu-04.cloud.pd.infn.it | internal | enabled | up    | 2015-03-27T10:27:01.000000 | -               |
 +| nova-conductor   | cld-blu-04.cloud.pd.infn.it | internal | enabled | up    | 2015-03-27T10:27:04.000000 | -               |
 +| nova-compute     | cld-blu-NN.cloud.pd.infn.it | nova     | enabled | up    | 2015-03-27T10:27:02.000000 | -               |
 ++------------------+-----------------------------+----------+---------+-------+----------------------------+-----------------+
 +</code>
 +
 +===== Add SSH passwordless access from Compute node to virtual instances =====
 +This is needed to allow nova to resize virtual instances. Execute the following commands:
 +<code bash>
 +usermod -s /bin/bash nova
 +mkdir -p -m 700 ~nova/.ssh
 +chown nova.nova ~nova/.ssh
 +cd ~nova/.ssh
 +scp cld-blu-03:/var/lib/nova/.ssh/* .
 +chown nova.nova * 
 +</code>
 +
 +===== Optional: Configure Nova Compute for SSL =====
 +<code bash>
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_host cloud.cedc.csia.unipd.it
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_protocol https
 +openstack-config --set /etc/nova/nova.conf keystone_authtoken cafile /etc/grid-security/chain.pem
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_ca_certificates_file /etc/grid-security/chain.pem
 +openstack-config --set /etc/nova/nova.conf DEFAULT cinder_ca_certificates_file /etc/grid-security/chain.pem
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_admin_auth_url https://cloud.cedc.csia.unipd.it:35357/v2.0
 +openstack-config --set /etc/nova/nova.conf DEFAULT novncproxy_base_url https://cloud.cedc.csia.unipd.it:6080/vnc_auto.html
 + 
 +openstack-config --set /etc/neutron/neutron.conf keystone_authtoken auth_host cloud.cedc.csia.unipd.it
 +openstack-config --set /etc/neutron/neutron.conf keystone_authtoken auth_url https://cloud.cedc.csia.unipd.it:35357/v2.0
 +openstack-config --set /etc/neutron/neutron.conf keystone_authtoken auth_protocol https
 +openstack-config --set /etc/neutron/neutron.conf DEFAULT ssl_ca_file /etc/grid-security/chain.pem
 +openstack-config --set /etc/neutron/api-paste.ini filter:authtoken auth_host cloud.cedc.csia.unipd.it
 + 
 +openstack-config --set /etc/nova/api-paste.ini filter:authtoken auth_host cloud.cedc.csia.unipd.it
 +openstack-config --set /etc/nova/api-paste.ini filter:authtoken auth_protocol https
 + 
 + 
 +openstack-config --set /etc/nova/nova.conf DEFAULT glance_host cloud.cedc.csia.unipd.it
 +openstack-config --set /etc/nova/nova.conf DEFAULT glance_protocol https
 +openstack-config --set /etc/nova/nova.conf DEFAULT glance_api_servers https://cloud.cedc.csia.unipd.it:9292
 +openstack-config --set /etc/nova/nova.conf DEFAULT ssl_ca_file /etc/grid-security/chain.pem
 +#openstack-config --set /etc/nova/nova.conf ssl ca_file /etc/grid-security/chain.pem
 +openstack-config --set /etc/nova/nova.conf DEFAULT glance_api_insecure true
 + 
 +openstack-config --set /etc/nova/nova.conf DEFAULT neutron_url https://cloud.cedc.csia.unipd.it:9696
 +</code>
 +Restart L2 agent and Nova Compute
 +<code bash>
 +systemctl restart openstack-nova-compute
 +systemctl restart neutron-openvswitch-agent
 +
 +</code>
 +=== Fix metadata agent ===
 +To address this [[https://bugs.launchpad.net/neutron/+bug/1263872|bug]], apply this [[https://review.openstack.org/#/c/79658/|patch]], or follow the instructions below:
 +<code bash>
 +curl -o agent.py https://raw.githubusercontent.com/CloudPadovana/SSL_Patches/master/agent.py
 +mv /usr/lib/python2.6/site-packages/neutron/agent/metadata/agent.py /usr/lib/python2.6/site-packages/neutron/agent/metadata/agent.py.bak
 +cp agent.py /usr/lib/python2.6/site-packages/neutron/agent/metadata/agent.py
 +
 +service openstack-nova-compute restart
 +service neutron-openvswitch-agent restart
 +
 +</code>
 +
 +=== ===
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