Ceph对象存储网关安装配置
引言
基于已部署好的Ceph集群，部署一个网关服务器，进行对象存储服务。操作系统CentOS6.5 CEPH0.94.3其实基于librados可以直接进行访问，但是我看了百度，UCLOUD的对象存储，用户在网页上进行文件的上传、下载时，都通过web服务器间接和存储集群打交道，进行了一层隔离，而不是直接和集群进行通信操作。我得理解是便于访问控制以及隔离。
1.依赖包安装
Ceph rados-gateway依赖Apache和FastCGI, 用户的请求先到web服务器，再走rados-gateway进入集群之中。
1.1 安装Apache服务
sudo yum install httpd Package httpd-2.2.15-47.el6.centos.x86_64 already installed and latest version
1.2 配置http服务器
sudo vim /etc/httpd/conf/httpd.conf将ServerName的注释号去掉，添加上自己网关服务器的IP地址
272 # If your host doesn't have a registered DNS name, enter its IP address here. 273 # You will have to access it by its address anyway, and this will make 274 # redirections work in a sensible way. 275 # 276 ServerName 101.67.163.34:80在配置中增加如下信息，加载mod_proxy_fcgi
<IfModule !proxy_fcgi_module> LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so </IfModule>此处需注意，需要将该段内容加载LoadModule系列的后面，否则会报如下错误：
sudo service httpd start Starting httpd: httpd: Syntax error on line 129 of /etc/httpd/conf/httpd.conf: Cannot load /etc/httpd/modules/mod_proxy_fcgi.so into server: /etc/httpd/modules/mod_proxy_fcgi.so: undefined symbol: ap_proxy_release_connection
修改配置中的LISTEN字段，将网关所在主机的IP地址添加进去
# Listen: Allows you to bind Apache to specific IP addresses and/or # ports, in addition to the default. See also the <VirtualHost> # directive. # # Change this to Listen on specific IP addresses as shown below to # prevent Apache from glomming onto all bound IP addresses (0.0.0.0) # Listen 101.67.163.34:80 #Listen 80
1.3 SSL支持 （此处是否必须不是很清楚，只是按照官方文档走）
秘钥文件生成sudo yum install mod_ssl openssl openssl genrsa -out ca.key 2048 openssl req -new -key ca.key -out ca.csr openssl x509 -req -days 365 -in ca.csr -signkey ca.key -out ca.crt
文件目录放置sudo cp ca.crt /etc/pki/tls/certs
sudo cp ca.key /etc/pki/tls/private/ca.key sudo cp ca.csr /etc/pki/tls/private/ca.csr
配置文件修改/etc/httpd/conf.d/ssl.conf.
SSLCertificateFile /etc/pki/tls/certs/ca.crt SSLCertificateKeyFile /etc/pki/tls/private/ca.key
重启httpd服务sudo service httpd restart
1.4 网关服务安装
sudo yum install ceph-radosgw至此，相关依赖包安装完毕
2. CEPH网关服务配置
ceph网关其实是ceph集群的一个客户端，用户通过这个网关间接访问ceph集群，作为客户端，它需要准备如下内容：网关名称，此处用gateway称呼
一个可以访问存储集群的用户以及对应的KEYRING
数据资源池，这个由ceph集群提供
为网关服务示例准备一个数据存放空间
在ceph.conf配置文件中设置gateway信息
2.1 创建访问用户及权限设置
创建gateway keyring，一开始该文件为空sudo ceph-authtool --create-keyring /etc/ceph/ceph.client.radosgw.keyring sudo chmod +r /etc/ceph/ceph.client.radosgw.keyring创建网关用户名以及key 此处名字为 client.radosgw.gateway
sudo ceph-authtool /etc/ceph/ceph.client.radosgw.keyring -n client.radosgw.gateway --gen-key为KEYRING添加权限
sudo ceph-authtool -n client.radosgw.gateway --cap osd 'allow rwx' --cap mon 'allow rwx' /etc/ceph/ceph.client.radosgw.keyring将key添加到集群中
sudo ceph -k /etc/ceph/ceph.client.admin.keyring auth add client.radosgw.gateway -i /etc/ceph/ceph.client.radosgw.keyring
将相关的KEYRING文件拷贝到rados-gateway所在的主机 /etc/ceph/目录下
2.2 数据资源池创建
.rgw.root .rgw.control .rgw.gc .rgw.buckets .rgw.buckets.index .rgw.buckets.extra .log .intent-log .usage .users .users.email .users.swift .users.uid
[root@gnop029-ct-zhejiang_wenzhou-16-34 conf]# ceph osd lspools 4 rbd,6 pool-1,7 pool-2,8 .rgw,9 .rgw.root,10 .rgw.control,11 .rgw.gc,12 .rgw.buckets,13 .rgw.buckets.index,14 .log,15 .intent-log,16 .usage,17 .users,18 .users.email,19 .users.swift,20 .users.uid
2.3 将网关配置信息添加到集群配置中
[client.radosgw.gateway] host=ceph-24 keyring=/etc/ceph/ceph.client.radosgw.keyring rgw socket path=/var/run/ceph/ceph.radosgw.gateway.fastcgi.sock log file=/var/log/radosgw/client.radosgw.gateway.log rgw frontends=fastcgi socket_port=9000 socket_host=0.0.0.0 rgw print continue=false
2.4 目录及权限调整
创建数据目录sudo mkdir -p /var/lib/ceph/radosgw/ceph-radosgw.gateway 调整apache运行权限 sudo chown apache:apache /var/run/ceph调整日志权限
sudo chown apache:apache /var/log/radosgw/client.radosgw.gateway.log
启动网关服务sudo /etc/init.d/ceph-radosgw start
2.5 网关配置文件
一个配置文件，用于web server和FastCGI之间的交互sudo vi /etc/httpd/conf.d/rgw.conf
<VirtualHost *:80>
ServerName 101.67.163.34
DocumentRoot /var/www/html
ErrorLog /var/log/httpd/rgw_error.log
CustomLog /var/log/httpd/rgw_access.log combined
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
SetEnv proxy-nokeepalive 1
ProxyPass / fcgi://101.67.163.34:9000/
</VirtualHost>
其中标红的地方是要根据实际情况填写
2.6 用户创建
radosgw-admin user create --uid=xuwenping --display-name="ceph xuwenping" [email protected] { "user_id": "xuwenping", "display_name": "ceph xuwenping", "email": "[email protected]", "suspended": 0, "max_buckets": 1000, "auid": 0, "subusers": [], "keys": [ { "user": "xuwenping", "access_key": "4J3GD7GJIJKSDCVS1I9T", "secret_key": "yfmxvzQdWT4EmVDijOFp6oNt4kZ25y9wRVARas4I" } ], "swift_keys": [], "caps": [], "op_mask": "read, write, delete", "default_placement": "", "placement_tags": [], "bucket_quota": { "enabled": false, "max_size_kb": -1, "max_objects": -1 }, "user_quota": { "enabled": false, "max_size_kb": -1, "max_objects": -1 }, "temp_url_keys": [] }创建SWIFT类型USER
sudo radosgw-admin subuser create --uid=xuwenping --subuser=xuwenping :swift --access=full
2015-10-10 14:19:19.854951 7f402eadc8a0 0 max_buckets=1000 specified=0
{
"user_id": "xuwenping",
"display_name": "ceph xuwenping",
"email": "[email protected]",
"suspended": 0,
"max_buckets": 1000,
"auid": 0,
"subusers": [
{
"id": "xuwenping:swift",
"permissions": "full-control"
}
],
"keys": [
{
"user": "xuwenping",
"access_key": "4J3GD7GJIJKSDCVS1I9T",
"secret_key": "yfmxvzQdWT4EmVDijOFp6oNt4kZ25y9wRVARas4I"
},
{
"user": "xuwenping:swift",
"access_key": "PEIT99BBWMZP31BD6S3I",
"secret_key": ""
}
],
"swift_keys": [
{
"user": "xuwenping:swift",
"secret_key": "qWHPhvUy4md1XSa2PSbcxUyMU5YXodlqxt0ZC2hn"
}
],
"caps": [],
"op_mask": "read, write, delete",
"default_placement": "",
"placement_tags": [],
"bucket_quota": {
"enabled": false,
"max_size_kb": -1,
"max_objects": -1
},
"user_quota": {
"enabled": false,
"max_size_kb": -1,
"max_objects": -1
},
"temp_url_keys": []
}
2.7 实际验证
编写了一段python代码，用于访问网关，并创建bucket，并通过list方法罗列出当前所有的bucket （官方示例）
依赖库安装
sudo yum install python-boto
import boto
import boto.s3.connection
access_key = '4J3GD7GJIJKSDCVS1I9T'
secret_key = 'yfmxvzQdWT4EmVDijOFp6oNt4kZ25y9wRVARas4I'
conn = boto.connect_s3(
aws_access_key_id = access_key,
aws_secret_access_key = secret_key,
host = '101.67.163.34',
is_secure=False,
calling_format = boto.s3.connection.OrdinaryCallingFormat(),
)
bucket = conn.create_bucket('my-new-bucket')
for bucket in conn.get_all_buckets():
print "{name}\t{created}".format(
name = bucket.name,
created = bucket.creation_date,
)
运行结果
[root@gnop029-ct-zhejiang_wenzhou-16-34 ceph-rados]# python s3test.py my-new-bucket 2015-10-10T06:23:48.000Z
至此，Ceph集群的对象存储网关安装设置完毕
附：
有时候通过yum安装软件是报如下错误：
Downloading Packages: warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 GPG key retrieval failed: [Errno 14] Could not open/read file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
yum install mod_proxy_fcgi --nogpgcheck