add README file for neutron cascaded_l3_patch and timestamp_cascaded_patch
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Openstack Neutron cascaded_l3_patch
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===============================
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Neutron cascaded_l3_patch is mainly used to achieve L3 communications crossing OpenStack. To solve the problem, we add 'onlink' field for extra route of router based on the ip range in neutron-server, and add GRE Tunnel in l3-agent. This patch should be made to the Cascaded Neutron nodes.
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Key modules
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-----------
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* We add GRE Tunnel in l3-agent by modifying some files:
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neutron/agent/linux/ip_lib.py
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neutron/agent/l3_agent.py
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* We add 'onlink' field for extra route of router based on the ip range in neutron-server by modifying some files:
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neutron/common/config.py
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neutron/db/extraroute_db.py
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Requirements
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------------
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* openstack neutron-2014.2 has been installed.
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Installation
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------------
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We provide two ways to install the Neutron cascaded_l3_patch. In this section, we will guide you through installing the Neutron cascaded_l3_patch with modifying the configuration.
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* **Note:**
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- Make sure you have an existing installation of **Openstack Neutron of Juno Version**.
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- We recommend that you Do backup at least the following files before installation, because they are to be overwritten or modified:
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$NEUTRON_PARENT_DIR/neutron
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(replace the $... with actual directory names.)
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* **Manual Installation**
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- Navigate to the local repository and copy the contents in 'neutron' sub-directory to the corresponding places in existing neutron, e.g.
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```cp -r $LOCAL_REPOSITORY_DIR/neutron $NEUTRON_PARENT_DIR```
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(replace the $... with actual directory name.)
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```
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- you can modify neutron config file
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$CONFIG_FILE_PATH/plugins/ml2/ml2_conf.ini
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Modify the value of firewall_driver option as:
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[securitygroup]
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firewall_driver=neutron.agent.firewall.NoopFirewallDriver
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$CONFIG_FILE_PATH/l3_agent.ini
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Modify the value of agent_mode option as:
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[DEFAULT]
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agent_mode=dvr_snat
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$CONFIG_FILE_PATH/neutron.conf, you can also don't modify
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Default value of 3gw_extern_net_ip_range option in config file, is
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l3gw_extern_net_ip_range=100.64.0.0/16
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- Restart the neutron-server and neutron-l3-agent.
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```service neutron-server restart```
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```service neutron-l3-agent restart```
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- Done.
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* **Automatic Installation**
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- Navigate to the installation directory and run installation script.
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```
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cd $LOCAL_REPOSITORY_DIR/installation
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sudo bash ./install.sh
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```
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(replace the $... with actual directory name.)
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- Done. The installation script will automatically modify the neutron code and the configurations.
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* **Troubleshooting**
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In case the automatic installation process is not complete, please check the followings:
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- Make sure your OpenStack version is Juno.
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- Check the variables in the beginning of the install.sh scripts. Your installation directories may be different from the default values we provide.
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- The installation code will automatically modify the related codes to $NEUTRON_PARENT_DIR/neutron and the related configuration.
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- In case the automatic installation does not work, try to install manually.
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Openstack Neutron timestamp_cascaded_patch
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===============================
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Neutron timestamp_cascaded_patch is mainly used to provide query filter 'sinces_change' for "list ports" API. To achieve the goal, we add three fields ('created_at'/'updated_at'/'delete_at') for ports table in neutron DB, and modify few lines of code in _apply_filters_to_query() function. This patch should be made to the Cascaded Neutron nodes.
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Key modules
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-----------
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* add three fields ('created_at'/'updated_at'/'delete_at') for ports table, and modify few lines of code in _apply_filters_to_query() function:
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neutron/db/migration/alembic_migrations/versions/238cf36dab26_add_port_timestamp_revision.py
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neutron/db/migration/core_init_ops.py
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neutron/db/common_db_mixin.py
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neutron/db/models_v2.py
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Requirements
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------------
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* openstack neutron-2014.2 has been installed.
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Installation
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------------
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We provide two ways to install the Neutron timestamp_cascaded_patch. In this section, we will guide you through installing the Neutron timestamp_cascaded_patch without modifying the configuration.
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* **Note:**
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- Make sure you have an existing installation of **Openstack Neutron of Juno Version**.
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- We recommend that you Do backup at least the following files before installation, because they are to be overwritten or modified:
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$NEUTRON_PARENT_DIR/neutron
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(replace the $... with actual directory names.)
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* **Manual Installation**
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- Navigate to the local repository and copy the contents in 'neutron' sub-directory to the corresponding places in existing neutron, e.g.
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```cp -r $LOCAL_REPOSITORY_DIR/neutron $NEUTRON_PARENT_DIR```
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(replace the $... with actual directory name.)
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- Upgrade DB
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```neutron-db-manage --config-file $CONFIG_FILE_PATH/neutron.conf --config-file $CONFIG_FILE_PATH/plugins/ml2/ml2_conf.ini upgrade head```
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(replace the $... with actual directory name.)
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- Restart the neutron-server.
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```service neutron-server restart```
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- Done.
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* **Automatic Installation**
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- Navigate to the installation directory and run installation script.
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```
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cd $LOCAL_REPOSITORY_DIR/installation
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sudo bash ./install.sh
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```
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(replace the $... with actual directory name.)
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- Done. The installation script will automatically modify the neutron code, upgrade DB and restart neutron-server.
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* **Troubleshooting**
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In case the automatic installation process is not complete, please check the followings:
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- Make sure your OpenStack version is Juno.
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- Check the variables in the beginning of the install.sh scripts. Your installation directories may be different from the default values we provide.
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- The installation code will automatically modify the related codes to $NEUTRON_PARENT_DIR/neutron.
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- In case the automatic installation does not work, try to install manually.
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