Bolog
0%

Ceph提供NFS服务 —— RGW＋nfs-ganesha

Posted on Edited on In

nfs-ganesha.jpg

Ceph是统一存储，包括块、文件、对象。其中块存储必须映射给linux内核，然后才能用，而内核客户端代码的更新收到了linus的限制，已经好久没更新了。librbd又不能直接用，不过道是可以用nbd映射一下使用。cephfs目前还不太适合生产环境。目前*nix对nfs的支持还是很全面的，而对librbd、cephfs的支持就是大不一样了。so，使ceph支持nfs协议很有意义了，but！ceph是分布式存储，被ganesha一搞，出现了单节点问题，所以只能想办法从HA角度解决了，这也是一种无奈，唉。。。

（～～一丝光～～）从nfs v4.1开始支持并行存储，这或许是一缕新曙光。

NFS-Ganesha架构

ceph-nfs-service-by-rgw-with-nfs-ganesha.png

实施

RGW搭建

关于RGW的安装搭建请于Ceph官网查看

用户创建

创建一个S3用户专门服务于nfs-ganesha

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
$ sudo radosgw-admin --uid=nfs_ganesha_user --display="User for NFS-Ganesha"
{
    "user_id": "nfs_ganesha_user",
    "display_name": "User for NFS-Ganesha",
    "email": "",
    "suspended": 0,
    "max_buckets": 1000,
    "auid": 0,
    "subusers": [],
    "keys": [
        {
            "user": "nfs_ganesha_user",
            "access_key": "xxxxxxxxxxxxxxxxxxxx",
            "secret_key": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
        }
    ],
    "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": []
}

user、access_key、secret_key是后续nfs-ganesha配置是需要使用到的。

nfs-ganesha编译部署

获取Project

1
2
3
4
5
6
7
8
9
// clone nfs-ganesha project
$ git clone https://github.com/nfs-ganesha/nfs-ganesha.git
$ cd ./nfs-ganesha

// 切换到v2.4 stable版本
$ git checkout V2.4-stable

// 获取submodule libntirpc
$ git submodule update --init

在正式开始编译前，需要安装一些包，libntirpc强制使用了GSS，使用-DUSE_GSS=OFF是不能关闭GSS使用的。所以在编译nfs-ganesha时不需要关闭GSS。
本人编译使用的系统是rhel7.2，需要安装一些软件包krb5-libs-1.14.1-27.el7_3.x86_64、krb5-devel-1.14.1-27.el7_3.x86_64、libgssglue-0.4-2.el7.nux.x86_64、libgssglue-devel-0.4-2.el7.nux.x86_64

编译安装

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
// libntirpc 编译 
$ cd ./nfs-ganesha/src/libntirpc
$ cmake ./
...
$ make
...

// nfs-ganesha 编译
$ cd ./nfs-ganesha
$ mkdir ./build
$ cd ./build
$ cmake -DUSE_NLM=OFF -DRGW_PREFIX=/usr -DUSE_FSAL_RGW=ON -DUSE_FSAL_CEPH=OFF -DCMAKE_INSTALL_PREFIX=/home/xxxxx/.local -DUSE_GSS=ON -DUSE_FSAL_ZFS=OFF -DUSE_NFSIDMAP=OFF -DUSE_FSAL_GLUSTER=OFF ../src
...
$ make
...
$ make install
...

// 为了能让ganesha正常运行，需要更新一下ld.cache，保证动态库可以正常加载
$ sudo echo "/home/xxxxx/.local/lib64/ganesha" >> /etc/ld.so.conf
$ sudo ldconfig -v

//生成RPM包
$ cpack -G RPM
...

配置启动

配置RGW的Keyring

librgw 访问ceph时会用到keyring，它回去/var/lib/ceph/radosgw/ceph-admin这个目录下去找keyring，这个目录需要用户自己创建并，copy一个keyring进去，这个keyring可以是admin，也可以是rgw实用的keyring，从权限管理角度建议使用rgw的keyring

撰写ganesha.conf.rgw

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
###################################################
#
# EXPORT
#
# To function, all that is required is an EXPORT
#
# Define the absolute minimal export
#
###################################################

EXPORT
{
        # Export Id (mandatory, each EXPORT must have a unique Export_Id)
        Export_Id = 1;

        # Exported path (mandatory)
        Path = "nfs_bucket";

        # Pseudo Path (required for NFS v4)
        Pseudo = "/nfs_bucket";

        # Required for access (default is None)
        # Could use CLIENT blocks instead
        Access_Type = RW;
        Protocols = 4;
        Transports = TCP;

        # Exporting FSAL
        FSAL {
             # Name = VFS;
             Name = RGW;
             User_Id = "xxxxxxxxxxx";
             Access_Key_Id = "xxxxxxxxxxxxxxxxxxxx";
             Secret_Access_Key = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
        }
}

RGW {
        ceph_conf = "/etc/ceph/ceph.conf";
        name = "client.admin";
        cluster = "ceph";
}

运行ganesha进程

1
sudo ganesha.nfsd -f /home/xxxxx/.local/etc/ganesha/ganesha.conf.rgw -F -L /var/log/ganesha.log

客户端连接

1
sudo mount -t nfs4 192.168.1.82:/nfs_bucket /mnt

docker容器部署

镜像

ananace/nfs-ganesha-ceph

gannesha配置

配置上来讲与编译部署没有太大差别

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
# NFS protocol options
EXPORT
{
  # Export Id (mandatory, each EXPORT must have a unique Export_Id)
  Export_Id = 77;

  # Exported path (mandatory)
  Path = /;

  # Pseudo Path (for NFS v4)
  Pseudo = /;

  # Access control options
  Access_Type = RW;
  Squash = No_Root_Squash;

  # NFS protocol options
  SecType = "sys";
  Transports = TCP;
  Protocols = 4;

  # Exporting FSAL
  FSAL {
    Name = RGW;
    User_Id = "admin";
    Access_Key_Id = "8I4K2USDV5SK3UFLQUB0";
    Secret_Access_Key = "A4JuvB468tmnDpmkZMfwesb2zmGZeSiCJlzJMALc";
  }
}

RGW {
    cluster = "ceph";
    ceph_conf = "/etc/ceph/ceph.conf";
    name = "client.rgw.host-10-100-13-111";
}

运行ganesha容器

由于Ganesha 的 FSAL 使用到了librgw，所以在镜像中会装好ceph-common、librgw2等。

1
docker run -d --net=host  -v /home/xxx/ceph/etc_ceph/:/etc/ceph:ro -v /home/xxx/ceph/ganesha/:/etc/ganesha:ro -v /home/xxx/ceph/var_lib_ceph/:/var/lib/ceph --name nfs -e GANESHA_BOOTSTRAP_CONFIG=no ananace/nfs-ganesha-ceph

docker 启动是需要设置环境变量GANESHA_BOOTSTRAP_CONFIG=no，默认配置为yes；若为yes的化，nfs-ganesha在启动的时候会重置/etc/ganesha/ganesha.conf配置文件。

参考&鸣谢