When you call a Compute Engine API that mutates a resource, Compute Engine adds an entryto the list of operations. For example, when you make an update to a VM thatmutates (alters) data, or when ahost eventoccurs that changes the state of a VM, operations are created. This pagedescribes how you can view a list of Compute Engine operations byusing theGoogle Cloud console, theGoogle Cloud CLI,orREST.

Remember that operations can take some time to complete, so you may findincomplete operations while viewing. When you want to see the final status ofincomplete operations, repeatedly viewing operations is not recommended;instead, you shouldwait for operations to be done.

Before you begin

• If you haven't already, set upauthentication. Authentication verifies your identity for access to Google Cloud services and APIs. To run code or samples from a local development environment, you can authenticate to Compute Engine by selecting one of the following options:

  Select the tab for how you plan to use the samples on this page:

  Console

  When you use the Google Cloud console to access Google Cloud services and APIs, you don't need to set up authentication.

  gcloud

  1. Install the Google Cloud CLI. After installation,initialize the Google Cloud CLI by running the following command:

     gcloudinit

     If you're using an external identity provider (IdP), you must first sign in to the gcloud CLI with your federated identity.

     Note: If you installed the gcloud CLI previously, make sure you have the latest version by runninggcloud components update.
  2. Set a default region and zone.

  REST

  To use the REST API samples on this page in a local development environment, you use the credentials you provide to the gcloud CLI.

  Install the Google Cloud CLI. After installation,initialize the Google Cloud CLI by running the following command:

  gcloudinit

  If you're using an external identity provider (IdP), you must first sign in to the gcloud CLI with your federated identity.

  Note: If you installed the gcloud CLI previously, make sure you have the latest version by runninggcloud components update.

  For more information, seeAuthenticate for using REST in the Google Cloud authentication documentation.

Operation Retention Period

While querying operations, keep in mind that completed operations areautomatically removed from the database after a certain period.

Compute Engine retains completed operations for at least the minimumretention period of 1 hour, and up to the maximum retention period of 14 days.Although projects often observe a retention period for completed operations thatis longer than the minimum of 1 hour, depending on the additional retentionperiod is not recommended.

Note that the retention periods don't apply to operations deleted by the usersthroughOperations.delete method.

Viewing operations

To view a list of operations for your project, perform the following steps:

gcloud compute operations list --filter="zone:(ZONE)"

gcloud compute operations list --filter="zone:(us-central1-c)"

NAME                            TYPE                                        TARGET                                HTTP_STATUS  STATUS  TIMESTAMPsystemevent-1543845145000...    compute.instances.migrateOnHostMaintenance  us-central1-c/instances/my-instance   200          DONE    2018-12-03T05:52:25.000-08:00

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/zones/ZONE/operations

{ "kind": "compute#operation", "id": "3216798767364213712", "name": "systemevent-1543845145000-57c1e7574b840-a195b637-5ff74d9b", "zone": "https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-c", "operationType": "compute.instances.migrateOnHostMaintenance", "targetLink": "https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-c/instances/my-instance", "targetId": "3070988523247098025", "status": "DONE", "statusMessage": "Instance migrated during Compute Engine maintenance.", "user": "system", "progress": 100, "insertTime": "2018-12-03T05:52:25.000-08:00", "startTime": "2018-12-03T05:52:25.000-08:00", "endTime": "2018-12-03T05:52:25.000-08:00", "selfLink": "https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-c/operations/systemevent-1543845145000-57c1e7574b840-a195b637-5ff74d9b"}