Freezer Scheduler

Client Registration

Make the agent/scheduler available to the api/cli/ui:

   freezer-scheduler register

Verify the client is registered correctly:

for kilo, liberty and mitaka:

   freezer-scheduler client-list

for newton onwards:

   freezer client-list

Scheduler Start/Stop

Start the scheduler

In order to poll the api to get new jobs, actions, etc. we need to start the scheduler

make sure to use the credentials for keystone v2.0 or v3 and you are root or Administrator on Windows

Keystone v2.0 and v3 authentication is supported for freezer

v2.0:

   export OS_BACKUP_URL=http://192.168.33.10:9090
   export OS_AUTH_URL=http://192.168.33.10:5000/v2.0
   export OS_USERNAME=admin
   export OS_PASSWORD=quiet
   export OS_TENANT_NAME=admin
   export OS_REGION_NAME=RegionOne
   export OS_IDENTITY_API_VERSION=2

v3:

   export OS_BACKUP_URL=http://192.168.33.10:9090
   export OS_AUTH_URL=http://192.168.33.10:5000/v3
   export OS_USERNAME=admin
   export OS_PASSWORD=quiet
   export OS_PROJECT_DOMAIN_NAME=admin
   export OS_USER_DOMAIN_NAME=admin
   export OS_PROJECT_NAME=admin
   export OS_REGION_NAME=RegionOne
   export OS_IDENTITY_API_VERSION=3

   freezer-scheduler start

Verify the scheduler is running:

   freezer-scheduler status

Stop the scheduler

   freezer-scheduler stop

It can be also be started as a foreground process using the –no-daemon flag:

  freezer-scheduler --no-daemon start

This can be useful for testing purposes, when launched in a Docker container, or by a babysitting process such as systemd.

Using the Scheduler

The cli-tool version is used to manage the jobs in the API. A “job” is basically a container; a document which contains one or more “actions”. An action contains the instructions for the freezer-agent. They are the same parameters that would be passed to the agent on the command line. For example: “backup_name”, “path_to_backup”, “max_level”

To sum it up, a job is a sequence of parameters that the scheduler pulls from the API and passes to a newly spawned freezer-agent process at the right time.

The scheduler understands the “scheduling” part of the job document, which it uses to actually schedule the job, while the rest of the parameters are substantially opaque.

It may also be useful to use the “-c” parameter to specify the client-id that the scheduler will use when interacting with the API.

The purpose of the client-id is to associate a job with the scheduler instance which is supposed to execute that job.

A single openstack user could manage different resources on different nodes (and actually may even have different freezer-scheduler instances running on the same node with different local privileges, for example), and the client-id allows him to associate the specific scheduler instance with its specific jobs.

When not provided with a custom client-id, the scheduler falls back to the default which is composed from the tenant-id and the hostname of the machine on which it is running.

Create a job

The first step to use the scheduler is creating a document with the job:

   {
       "job_actions": [{
            "freezer_action": {
                 "action": "backup",
                      "mode": "fs",
                      "backup_name": "backup1",
                       "path_to_backup": "/home/me/datadir",
                       "container": "schedule_backups",
                       "log_file": "/home/me/.freezer/freezer.log"
                },
               "max_retries": 3,
               "max_retries_interval": 60
         }],
         "job_schedule": {
              "schedule_interval": "4 hours",
              "schedule_start_date": "2015-08-16T17:58:00"
        },
        "description": "schedule_backups 6"
   }

Then upload that job into the API

for kilo, liberty and mitaka:

  freezer-scheduler -c node12 job-create --file test_job.json

for newton onwards:

  freezer job-create --file test_job.json  -C node12

List jobs

for kilo, liberty and mitaka:

  freezer-scheduler -c node12 job-list

for newton onwards:

 freezer job-list -C node12

Get the content of a job

for kilo, liberty and mitaka:

  freezer-scheduler -c node12 job-get -j 07999ea33a494ccf84590191d6fe850c

for newton onwards:

 freezer job-get 07999ea33a494ccf84590191d6fe850c -C node12

Freezer-docs

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