Ceph對象存儲網關安裝配置

引言

基於已部署好的Ceph集羣，部署一個網關服務器，進行對象存儲服務。操做系統CentOS6.5 CEPH0.94.3其實基於librados能夠直接進行訪問，可是我看了百度，UCLOUD的對象存儲，用戶在網頁上進行文件的上傳、下載時，都經過web服務器間接和存儲集羣打交道，進行了一層隔離，而不是直接和集羣進行通訊操做。我得理解是便於訪問控制以及隔離。

1.依賴包安裝

Ceph rados-gateway依賴Apache和FastCGI, 用戶的請求先到web服務器，再走rados-gateway進入集羣之中。

 

1.1 安裝Apache服務

sudo yum install httpd
Package httpd-2.2.15-47.el6.centos.x86_64 already installed and latest version

 

1.2 配置http服務器

 

sudo vim /etc/httpd/conf/httpd.conf

將ServerName的註釋號去掉，添加上本身網關服務器的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

在配置中增長以下信息，加載mod_proxy_fcgi

 

<IfModule !proxy_fcgi_module>
LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so
</IfModule>

此處需注意，須要將該段內容加載LoadModule系列的後面，不然會報以下錯誤：

 

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，將網關所在主機的IP地址添加進去

# 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 （此處是否必須不是很清楚，只是按照官方文檔走）

祕鑰文件生成

 

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

文件目錄放置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

重啓httpd服務sudo service httpd restart

 

1.4 網關服務安裝

sudo yum install ceph-radosgw

至此，相關依賴包安裝完畢

 

 

 

2. CEPH網關服務配置

ceph網關實際上是ceph集羣的一個客戶端，用戶經過這個網關間接訪問ceph集羣，做爲客戶端，它須要準備以下內容：
網關名稱，此處用gateway稱呼
一個能夠訪問存儲集羣的用戶以及對應的KEYRING
數據資源池，這個由ceph集羣提供
爲網關服務示例準備一個數據存放空間
在ceph.conf配置文件中設置gateway信息

 

 

 

 

 

2.1 建立訪問用戶及權限設置

建立gateway keyring，一開始該文件爲空

 

 

 

sudo ceph-authtool --create-keyring /etc/ceph/ceph.client.radosgw.keyring
sudo chmod +r /etc/ceph/ceph.client.radosgw.keyring

建立網關用戶名以及key  此處名字爲 client.radosgw.gateway 

 

sudo ceph-authtool /etc/ceph/ceph.client.radosgw.keyring -n client.radosgw.gateway --gen-key

爲KEYRING添加權限

 

sudo ceph-authtool -n client.radosgw.gateway --cap osd 'allow rwx' --cap mon 'allow rwx' /etc/ceph/ceph.client.radosgw.keyring

將key添加到集羣中

 

sudo ceph -k /etc/ceph/ceph.client.admin.keyring auth add client.radosgw.gateway -i /etc/ceph/ceph.client.radosgw.keyring

將相關的KEYRING文件拷貝到rados-gateway所在的主機 /etc/ceph/目錄下

 

2.2 數據資源池建立

.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 將網關配置信息添加到集羣配置中

 

[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 目錄及權限調整

建立數據目錄

 

sudo mkdir -p /var/lib/ceph/radosgw/ceph-radosgw.gateway   
調整apache運行權限
sudo chown apache:apache /var/run/ceph

調整日誌權限

 

sudo chown apache:apache /var/log/radosgw/client.radosgw.gateway.log

啓動網關服務sudo /etc/init.d/ceph-radosgw start

 

2.5 網關配置文件

一個配置文件，用於web server和FastCGI之間的交互
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>

其中標紅的地方是要根據實際狀況填寫

 

2.6 用戶建立

radosgw-admin user create --uid=xuwenping --display-name="ceph xuwenping" --email=xuwenping@d***n.com
{
    "user_id": "xuwenping",
    "display_name": "ceph xuwenping",
    "email": "xuwenping@dnion.com",
    "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": []
}

建立SWIFT類型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": "xuwenping@dnion.com",
    "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 實際驗證

編寫了一段python代碼，用於訪問網關，並建立bucket，並經過list方法羅列出當前全部的bucket （官方示例）

依賴庫安裝

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,
)

運行結果

[root@gnop029-ct-zhejiang_wenzhou-16-34 ceph-rados]# python s3test.py 
my-new-bucket	2015-10-10T06:23:48.000Z

至此，Ceph集羣的對象存儲網關安裝設置完畢

 

附：

有時候經過yum安裝軟件是報以下錯誤：

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

 

 

在執行 安裝命令時帶上以下參數便可：

yum install mod_proxy_fcgi   --nogpgcheck