How to install Savanna

Pre-conditions: openstack has been installed successfully.


解压软件包中的savanna-all.tar.gz安装tar -C / -xzf savanna-all.tar.gz安装了下列软件
1、/openstack-horizon
2、/etc/savanna/savanna.conf
3、/usr/local/bin/savanna-api和savanna-db-manage
4、/usr/local/lib/python2.7/dist-packages
5、上传镜像到glance服务器：glance image-create --name=vanilla-hadoop.image --disk-format=qcow2 --container-format=bare < ./savanna-0.1.2-hadoop.qcow2
一、horizon的安装和配置。
1、将软件包中openstack-horizon拷贝到目标机器的根目录下 /
2、cp openstack_dashboard/local/local_settings.py.example openstack_dashboard/local/local_settings.py
3、修改local_settings.py的配置
[skipped]
OPENSTACK_HOST = "172.18.79.139" <------ KeyStone address
OPENSTACK_KEYSTONE_URL = "http://%s:5000/v2.0" % OPENSTACK_HOST
OPENSTACK_KEYSTONE_DEFAULT_ROLE = "Member"
[skipped]
4、在keystone服务器上面注册horizon的服务（如果openstack已经安装成功，这个已经注册过了，可以省略）。
5、启动horizon服务 python manage.py runserver 0.0.0.0:6666(端口号可以任意)
6、在客户端浏览器上输入horizon所在的目标主机ip加端口进行访问。

可能存在的问题
1、缺少lessc的CSS样式
回答：
解决方案按照如下的次序安装软件包中savanna依赖的包.
libc-ares2 amd64
libv8-3.8.9.20 amd64                                                     
libev4 amd64                                                               
nodejs amd64                                                     
node-less
设置样式链接，使用系统/usr/bin/lessc样式来展示horizon的页面
ln -s /usr/bin/lessc <path_to_horizon>/bin/less/lessc

二、savanna的安装和配置
1、修改/etc/savanna/savanna.conf配置文件，可以修改端口prot和进行keystone认证的参数
os_auth_host=10.0.0.100
os_auth_port=35357
os_admin_username=nova
os_admin_password=service_pass
os_admin_tenant_name=service

2、在keystone上面注册savanna服务
keystone service-create --name savanna --type mapreduce --description "Savanna"

keystone endpoint-create --service-id ed08fa240cbd40898eab09eb9d5c3d0c --internalurl "http://25.8.67.32:9000/v0.2/%(tenant_id)s" --publicurl "http://25.8.67.32:9000/v0.2/%(tenant_id)s" --adminurl "none"

上面service-id为第一步成说那话是的id地址，ip地址为horizon的ip地址，端口为savanna配置文件中指定的端口。

这个过程中可能需要修改keystone所在主机的/root/.bashrc
export OS_TENANT_NAME=admin
export OS_USERNAME=admin
export OS_PASSWORD=keystone_admin
export OS_AUTH_URL="http://25.8.67.32:5000/v2.0/"
source /root/.bashrc

3、产生savanna使用的数据库
savanna‐db-manage ‐‐config‐file /etc/savanna/savanna.conf 后面参数自己尝试，可以参见软件包中savanna-db-manage

4、启动savanna服务
savanna‐api ‐‐config‐file /etc/savanna/savanna.conf

按照上述的步骤完成后可能存在着一下的问题，就是savanna的提供的服务由于版本号关系不能正确解析，由于savanna-all中的版本是1.0的版本的，由于1.0版本中有些服务还没有开发完，因此在创建node-temple的时候有问题（cluster-templete可以成功创建），因此我们将将savanna的版本降到稳定版上面，主要替换savanna的api文件以及savanna原始文件中被1.0版本所覆盖的文件。
a、将软件包中savanna文件拷贝到目标机器
b、使用setup.py来安装
c、主要的工作主要包括：替换/usr/local/bin下面关于savanna的运行文件；替换savanna.conf文件这个可能需要注意进行重新进行配置；主要替换/usr/local/lib/python2.7/dist-packages文件中的内容，主要看api文件中的都换成0.2的版本。
sudo savanna--manage --config-file /etc/savanna/savanna.conf reset-db --with-gen-templates
sudo savanna-api --config-file /etc/savanna/savanna.conf

5. Questions and Answers.
Q1: can not create DataNode Template through the website
Answer: go to /openstack-horizon/openstack_dashboard/api/savanna.py and modify line 139 and change "task_tracker_opts" to " job_tracker_opts"
if "tt" in str(node_type).lower():
        #template_data["task_tracker"] = task_tracker_opts
        template_data["task_tracker"] = job_tracker_opts
if "dn" in str(node_type).lower():
        #template_data["data_node"] = data_node_opts
        template_data["data_node"] = name_node_opts


Q2: when I start the hadoop cluster and find that the namenode  can no get the correct ip addresses of slavers
Answer:go to /usr/local/lib/python2.7/dist-packages/savanna-0.1.2.a3.gda0f4b7-py2.7.egg/savanna/service/cluster_ops.py and modify the function _check_if_up(nova, node):
    if len(nets) == 0:
            print "VM's networking is not configured yet"
            eventlet.sleep(10)
            return
    This could be improved by another methods.

Q3: when starting hadoop, through the logging file we can see hadoop can not find the host "ubuntu"
Answer: go to cluster_ops.py and modify the following function. adding the mapping between hostname and ip address.
def _generate_hosts(clmap):
    hosts = "127.0.0.1 localhost\n"
    hosts += "127.0.0.1 ubuntu\n"

Q4: through the log, we found the the hadoop can not create the following files.
Answer: go to cluster_ops.py and add the following code in fucntion _setup_node(node,clmap) before ret=_open_channel_and_execute()
     sftp.mkdir('/var/run/hadoop')
        sftp.chmod('/var/run/hadoop',0777)

Q5: how to configure the ip to address http://%s:50030 to see the details of jobtracker
Answers: go to node1 and configure the ip routers
    ipvsadm -A -t node1:port -s rr
    ipvsadm -a -t node1:port -r privateIP:50030 -m -w 1

Q6: hadoop has no privilige to create /tmp/savanna-hadoop-start-all.log
Answers: go to cluster.py and modify the function _start_cluster()
    change the direction of the log file.

Q7: Maybe there is somethings wrong in function _setup_ssh_connection(host,ssh) in cluster_opts.py, you should specify the prot 22 in ssh.connection(host,port,username,passowrd)