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Lifecycle errands are BOSH errands (scripts) that run at the beginning and end of an installed product’s availability time. Product teams create errands as part of a product package, and a product can only run errands it includes.
For more information about BOSH errands, see BOSH documentation, and for more information about errands in Ops Manager, see Managing Errands in Ops Manager.
In Ops Manager v2.0 and later, tile authors can choose to colocate errands on existing VMs. When errands are not colocated, BOSH deploys a new VM for each errand defined in the tile metadata. Colocated errands can run alongside other jobs or errands on existing VMs in an operator’s deployment.
Products can have two kinds of errands. Post-deploy errands run after a product installs but before Ops Manager displays makes it available for use. Pre-delete errands run after an operator chooses to delete a product, but before Ops Manager finishes removing it from use.
To save deployment time, operators can set errand run rules that dictate whether or not errands run. Tile authors can set defaults for these run rules.
Define a Colocated Errand
Note: Ops Manager v2.0 and later supports colocated errands.
Instead of deploying a new VM for each errand, colocated errands run on an existing VM. Errands can run alongside other jobs on a VM, and multiple errands can be colocated on the same VM. Colocated errands run faster than traditional errands and use fewer resources, including disk and IP space.
To configure a colocated errand, define the following properties in the
post_deploy_errands sections of the tile metadata:
||Provide the name of the errand job. The example manifest in the following section uses
||Set this value to
||(Optional) You can set the run rules to
If you do not define this property, Ops Manager sets the run default to
||(Optional) Provide an array that tells BOSH where to run the errand.
Use the name of an instance group, such as
If you do not define this property or you provide an empty array, the errand runs on every instance of the job in the operator’s deployment.
||Define the errand name to be shown in the tile’s Errand Config tab and
above Apply Changes.
The example manifest in the following section uses
||(Optional) Provide a description for the errand that appears in the tile’s Errand Config tab.|
||(Optional) Provide an impact warning that appears in the Review Pending Changes tab before running the errand.|
After defining the errand in the sections above, add the errand to the job properties in the
Colocated Errand Example Manifest
The following example shows colocated
in the tile metadata:
post_deploy_errands: - name: example-errand colocated: false impact_warning: "This is an impact warning for your post-deploy errand." - name: example_colocated_errand colocated: true run_default: on instances: - web_server/first label: colocated errand on web_server description: This errand does little more than print a message to prove colocated errands work. pre_delete_errands: - name: example-errand impact_warning: "This is an impact warning for your pre-delete errand."
The following example shows the colocated errands referenced within the
job_types: - name: web_server resource_label: Web Server templates: - name: web_server release: example-release provides: | web_server_info: (( .properties.example_selector.selected_option.parsed_manifest(provides_section) )) consumes: | web_server_info: (( .properties.example_selector.selected_option.parsed_manifest(consumes_section) )) - name: time_logger release: example-release - name: example_colocated_errand release: example-release release: example-release static_ip: 1 dynamic_ip: 0 max_in_flight: 1
Post-deploy errands run after a product installs, but before Ops Manager makes it available for use.
Typical post-install errands include smoke or acceptance tests, database initialization or database migration, and service broker registration.
Post-deploy errands run by default. An operator can prevent a post-deploy errand from running by setting its run rule to Off under Pending Changes in the Ops Manager Installation Dashboard or on the service’s Settings tab Errands pane, before installing the product.
For example, Redis has a Broker Registrar post-deploy errand that the VMware Tanzu Application Service for VMs tile uses to register its service broker with the Cloud Controller and publish its service plans.
If an operator selects Off in dropdown for Redis’s Broker Registrar errand before installation, Redis’s service broker is not registered with the Cloud Controller and its service plans are not made public.
Pre-delete errands run after an operator chooses to delete a product, but before Ops Manager actually finishes deleting it.
Typical pre-delete errands include cleanup of application artifacts and service broker de-registration. For example, MySQL for VMware Tanzu has a Broker Deregistrar pre-delete errand that:
- Purges the service offering
- Purges all service instances
- Purges all application bindings
- Deletes the service broker from the Cloud Controller
When an operator chooses to delete the MySQL for VMware Tanzu product, Ops Manager first runs the Broker Deregistrar pre-delete errand, then deletes the product.
Pre-delete errands run by default. An operator can prevent a pre-delete errand from running by setting its run rule to Off under Pending Changes in the Ops Manager Installation Dashboard or on the product tile’s Settings tab Errands pane, before installing the product.
Errand Run Rules
Some errands do not always need to run. For example, installing a minor patch to a existing service might not require re-registering its broker. Ops Manager lets operators save installation time by turning errands off or on. They set these errand run rules in two places:
One-Time Rules under Pending Changes in the Ops Manager Installation Dashboard. These rules only apply to the next time you run Apply Changes and do not persist after the next successful installation.
Persistent Rules in the tile’s Errands pane. These rules persist through subsequent installations, until changed in the Errands pane.
For more information, see Configure Run Rules in Ops Manager.