Creating Ceph block devices and snapshots based on Go-ceph

First, prepare the code before execution

1. Ceph cluster installed in the system

2. Src/github.com/noahdesu/go-ceph code base exists in Gopath directory

3, under Ubuntu 14.04 also need to Apt-get Librados-dev and Librbd-dev two packs

Second, code example

Package main import ("FMT" "Github.com/noahdesu/go-ceph/rados" "GITHUB.COM/NOAHDESU/GO-CEPH/RBD") const ( Defaultradosconfigfile = "/etc/ceph/ceph.conf" defaultbaseimagesize = ten * 1024x768 * 1024x768 * 1024DefaultPoolName = "RBD") func m Ain () {//Connect to the Clusterconn,_: = Rados. Newconn () If ERR: = conn. Readconfigfile (Defaultradosconfigfile); Err! = Nil {fmt. Printf ("Rbd read config failed:%v", err) return}if ERR: = conn. Connect (); Err! = Nil {fmt. Printf ("RBD Connect failed:%v", err) return}//connect to the POOLIOCTX,ERR: = conn. Openiocontext (defaultpoolname) if err! = Nil {fmt. Printf ("RBD Open pool failed:%v", err) return}//Create base imagebaseimagename: = "Test" _,err = Rbd. Create (IOCTX,BASEIMAGENAME,DEFAULTBASEIMAGESIZE,RBD. rbdfeaturelayering) If err! = Nil {fmt. Printf ("RBD Create image failed:%v", err) return}img: = Rbd. GetImage (Ioctx,baseimagename)//We should open base image firstif ERR: = img. Open (); Err! = Nil {fmt. Printf ("RBD Open image failed:%v", err) return}defer img. Close ()//Create SNAPshotsnapname: = "Test-snap" snapshot,err: = img. CreateSnapshot (snapname) if err! = Nil {fmt. Printf ("RBD Create snapshot failed:%v", err) return}//Protect Snapshot If err: = Snapshot. Protect (); Err! = Nil {fmt. Printf ("RBD Create snapshot failed:%v", err) return}//make a clone image based on the snap shotcloneimagename: = "clone-t EST "_,err = img. Clone (SNAPNAME,IOCTX,CLONEIMAGENAME,RBD. rbdfeaturelayering) If err! = Nil {fmt. Printf ("Rbd clone snapshot failed:%v", err) return}return}

　　

Finally, a base image named "Test" is generated and a snapshot based on "test" named "Test-snap", and finally a clone based on snapshot "Test-snap".

Note: When you create the "test", the size parameter cannot be too small, or an error occurs when the snapshot is created.

Creating Ceph block devices and snapshots based on Go-ceph