1. 14 1月, 2013 1 次提交
  2. 09 1月, 2013 1 次提交
  3. 21 12月, 2012 6 次提交
  4. 13 12月, 2012 4 次提交
    • D
      Add support for re-exec() of virtlockd upon SIGUSR1 · f234dc93
      Daniel P. Berrange 提交于
      The virtlockd daemon maintains file locks on behalf of libvirtd
      and any VMs it is running. These file locks must be held for as
      long as any VM is running. If virtlockd itself ever quits, then
      it is expected that a node would be fenced/rebooted. Thus to
      allow for software upgrads on live systemd, virtlockd needs the
      ability to re-exec() itself.
      
      Upon receipt of SIGUSR1, virtlockd will save its current live
      state out to a file /var/run/virtlockd-restart-exec.json
      It then re-exec()'s itself with exactly the same argv as it
      originally had, and loads the state file, reconstructing any
      objects as appropriate.
      
      The state file contains information about all locks held and
      all network services and clients currently active. An example
      state document is
      
       {
          "server": {
              "min_workers": 1,
              "max_workers": 20,
              "priority_workers": 0,
              "max_clients": 20,
              "keepaliveInterval": 4294967295,
              "keepaliveCount": 0,
              "keepaliveRequired": false,
              "services": [
                  {
                      "auth": 0,
                      "readonly": false,
                      "nrequests_client_max": 1,
                      "socks": [
                          {
                              "fd": 6,
                              "errfd": -1,
                              "pid": 0,
                              "isClient": false
                          }
                      ]
                  }
              ],
              "clients": [
                  {
                      "auth": 0,
                      "readonly": false,
                      "nrequests_max": 1,
                      "sock": {
                          "fd": 9,
                          "errfd": -1,
                          "pid": 0,
                          "isClient": true
                      },
                      "privateData": {
                          "restricted": true,
                          "ownerPid": 1722,
                          "ownerId": 6,
                          "ownerName": "f18x86_64",
                          "ownerUUID": "97586ba9-df27-9459-c806-f016c8bbd224"
                      }
                  },
                  {
                      "auth": 0,
                      "readonly": false,
                      "nrequests_max": 1,
                      "sock": {
                          "fd": 10,
                          "errfd": -1,
                          "pid": 0,
                          "isClient": true
                      },
                      "privateData": {
                          "restricted": true,
                          "ownerPid": 1784,
                          "ownerId": 7,
                          "ownerName": "f16x86_64",
                          "ownerUUID": "7b8e5e42-b875-61e9-b981-91ad8fa46979"
                      }
                  }
              ]
          },
          "defaultLockspace": {
              "resources": [
                  {
                      "name": "/var/lib/libvirt/images/f16x86_64.raw",
                      "path": "/var/lib/libvirt/images/f16x86_64.raw",
                      "fd": 14,
                      "lockHeld": true,
                      "flags": 0,
                      "owners": [
                          1784
                      ]
                  },
                  {
                      "name": "/var/lib/libvirt/images/shared.img",
                      "path": "/var/lib/libvirt/images/shared.img",
                      "fd": 12,
                      "lockHeld": true,
                      "flags": 1,
                      "owners": [
                          1722,
                          1784
                      ]
                  },
                  {
                      "name": "/var/lib/libvirt/images/f18x86_64.img",
                      "path": "/var/lib/libvirt/images/f18x86_64.img",
                      "fd": 11,
                      "lockHeld": true,
                      "flags": 0,
                      "owners": [
                          1722
                      ]
                  }
              ]
          },
          "lockspaces": [
      
          ],
          "magic": "30199"
       }
      Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      f234dc93
    • D
      Enable systemd socket activation with virtlockd · 74c0353e
      Daniel P. Berrange 提交于
      This enhancement virtlockd so that it can receive a pre-opened
      UNIX domain socket from systemd at launch time, and adds the
      systemd service/socket unit files
      
      * daemon/libvirtd.service.in: Require virtlockd to be running
      * libvirt.spec.in: Add virtlockd systemd files
      * src/Makefile.am: Install systemd files
      * src/locking/lock_daemon.c: Support socket activation
      * src/locking/virtlockd.service.in, src/locking/virtlockd.socket.in:
        systemd unit files
      * src/rpc/virnetserverservice.c, src/rpc/virnetserverservice.h:
        Add virNetServerServiceNewFD() method
      * src/rpc/virnetsocket.c, src/rpc/virnetsocket.h: Add virNetSocketNewListenFD
        method
      Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      74c0353e
    • D
      Implement dispatch functions for lock protocol in virtlockd · 0e49b839
      Daniel P. Berrange 提交于
      Introduce a lock_daemon_dispatch.c file which implements the
      server side dispatcher the RPC APIs previously defined in the
      lock protocol.
      Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      0e49b839
    • D
      Introduce basic infrastructure for virtlockd daemon · c57e3d89
      Daniel P. Berrange 提交于
      The virtlockd daemon will maintain locks on behalf of libvirtd.
      There are two reasons for it to be separate
      
       - Avoid risk of other libvirtd threads accidentally
         releasing fcntl() locks by opening + closing a file
         that is locked
       - Ensure locks can be preserved across libvirtd restarts.
         virtlockd will need to be able to re-exec itself while
         maintaining locks. This is simpler to achieve if its
         sole job is maintaining locks
      Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      c57e3d89