Workspace reconciliation logic

This document shows how different events change the database records and how the communication between rails and agentk reflects these events.

Two kinds of workspace reconciliation updates exist: full and partial. For more information, see Types of messages.

Modeling scenarios for partial synchronization

• request - The event that occurs. CURRENT_DB_STATE describes the state of the database before any event occurs.
• include config_to_apply in workspace_rails_info response?
  • For events CURRENT_DB_STATE and USER_ACTION, this is not applicable. Signified by a -.
  • For events AGENT_ACTION - Based on the state of the database before the database is updated by the information received from agentk about the workspace, should Rails send the config_to_apply information to agentk based on the condition desired_state_updated_at >= responded_to_agent_at?
• include deployment_resource_version in workspace_rails_info response? - Should Rails send the deployment_resource_version information to agentk?
  • This field is not shown in the table below for brevity as it always evaluates to true in the scenarios below (except for the one scenario where it is called out).
  • Rules of evaluation:
    • If information about the workspace was received from agentk, then Yes
    • If configuration to apply for the workspace is being sent to agentk, then Yes
    • Else, No
• desired_state_updated_at, responded_to_agent_at, desired_state, actual_state - The state of the database after the event occurs
• responded_to_agent_at is always updated to the current timestamp when Rails responds to agent with information about the workspace. The information can include config_to_apply or deployment_resource_version or both.

desired: Running / actual: CreationRequested → desired: Running / actual: Running

New workspace is requested by the user which results in a Running actual state.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Empty database	-
USER_ACTION - User has requested a new workspace	-	Running	CreationRequested	05:00
AGENT_ACTION - agentk reports no info	Y	Running	CreationRequested	05:00	05:01
AGENT_ACTION - agentk reports it as Starting	N	Running	Starting	05:00	05:02
AGENT_ACTION - agentk reports it as Running	N	Running	Running	05:00	05:03

desired: Running / actual: CreationRequested → desired: Running / actual: Failed

New workspace is requested by the user which results in a Failed actual state (for example, the container is crashing).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Empty database	-
USER_ACTION - User has requested a new workspace	-	Running	CreationRequested	05:00
AGENT_ACTION - agentk reports no info	Y	Running	CreationRequested	05:00	05:01
AGENT_ACTION - agentk reports it as Starting	N	Running	Starting	05:00	05:02
AGENT_ACTION - agentk reports it as Failing	N	Running	Failed	05:00	05:03

desired: Running / actual: CreationRequested → desired: Running / actual: Error

New workspace is requested by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Empty database	-
USER_ACTION - User has requested a new workspace	-	Running	CreationRequested	05:00
AGENT_ACTION - agentk reports no info	Y	Running	CreationRequested	05:00	05:01
AGENT_ACTION - agentk reports it as Error	N	Running	Error	05:00	05:02

desired: Running / actual: Running → desired: Stopped / actual: Stopped

Running workspace is stopped by the user which results in a Stopped actual state.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
USER_ACTION - User stops the workspace	-	Stopped	Running	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Stopped	Running	05:02	05:03
AGENT_ACTION - agentk reports it as Stopping	N	Stopped	Stopping	05:02	05:04
AGENT_ACTION - agentk reports it as Stopped	N	Stopped	Stopped	05:02	05:05

desired: Running / actual: Running → desired: Stopped / actual: Failed

Running workspace is stopped by the user which results in a Failed actual state (for example, could not unmount volume and stop the workspace).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
USER_ACTION - User stops the workspace	-	Stopped	Running	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Stopped	Running	05:02	05:03
AGENT_ACTION - agentk reports it as Stopping	N	Stopped	Stopping	05:02	05:04
AGENT_ACTION - agentk reports it as Failed	N	Stopped	Failed	05:02	05:05

desired: Running / actual: Running → desired: Stopped / actual: Error

Running workspace is stopped by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
USER_ACTION - User stops the workspace	-	Stopped	Running	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Stopped	Running	05:02	05:03
AGENT_ACTION - agentk reports it as Error	N	Stopped	Error	05:02	05:04

desired: Running / actual: Running → desired: Terminated / actual: Terminated

Running workspace is terminated by the user which results in a Terminated actual state.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Running	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Running	05:02	05:03
AGENT_ACTION - agentk reports it as Terminated	N	Terminated	Terminated	05:02	05:04

desired: Running / actual: Running → desired: Terminated / actual: Failed

Running workspace is terminated by the user which results in a Failed actual state (for example, could not unmount volume and terminate the workspace).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Running	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Running	05:02	05:03
AGENT_ACTION - agentk reports it as Failed	N	Terminated	Failed	05:02	05:04

desired: Running / actual: Running → desired: Terminated / actual: Error

Running workspace is terminated by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Running	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Running	05:02	05:03
AGENT_ACTION - agentk reports it as Error	N	Terminated	Error	05:02	05:04

desired: Stopped / actual: Stopped → desired: Running / actual: Running

Stopped workspace is started by the user which results in a Running actual state.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Stopped state	-	Stopped	Stopped	05:00	05:01
USER_ACTION - User starts the workspace	-	Running	Stopped	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Running	Stopped	05:02	05:03
AGENT_ACTION - agentk reports it as Starting	N	Running	Starting	05:02	05:04
AGENT_ACTION - agentk reports it as Running	N	Running	Running	05:02	05:05

desired: Stopped / actual: Stopped → desired: Running / actual: Failed

Stopped workspace is started by the user which results in a Failed actual state (for example, container is crashing).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Stopped state	-	Stopped	Stopped	05:00	05:01
USER_ACTION - User starts the workspace	-	Running	Stopped	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Running	Stopped	05:02	05:03
AGENT_ACTION - agentk reports it as Starting	N	Running	Starting	05:02	05:04
AGENT_ACTION - agentk reports it as Failed	N	Running	Failed	05:02	05:05

desired: Stopped / actual: Stopped → desired: Running / actual: Error

Stopped workspace is started by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Stopped state	-	Stopped	Stopped	05:00	05:01
USER_ACTION - User starts the workspace	-	Running	Stopped	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Running	Stopped	05:02	05:03
AGENT_ACTION - agentk reports it as Error	N	Running	Error	05:02	05:04

desired: Stopped / actual: Stopped → desired: Terminated / actual: Terminated

Stopped workspace is terminated by the user which results in a Terminated actual state.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Stopped state	-	Stopped	Stopped	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Stopped	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Stopped	05:02	05:03
AGENT_ACTION - agentk reports it as Terminated	N	Terminated	Terminated	05:02	05:04

desired: Stopped / actual: Stopped → desired: Terminated / actual: Failed

Stopped workspace is terminated by the user which results in a Failed actual state (for example, could not unmount volume and terminate the workspace).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Stopped state	-	Stopped	Stopped	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Stopped	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Stopped	05:02	05:03
AGENT_ACTION - agentk reports it as Failed	N	Terminated	Failed	05:02	05:04

desired: Stopped / actual: Stopped → desired: Terminated / actual: Error

Stopped workspace is terminated by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Stopped state	-	Stopped	Stopped	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Stopped	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Stopped	05:02	05:03
AGENT_ACTION - agentk reports it as Error	N	Terminated	Error	05:02	05:04

desired: Running / actual: Failed → desired: Running / actual: Running

Failed workspace becomes ready which results in a Running actual state (for example, container is no longer crashing).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
AGENT_ACTION - agentk reports it as Starting	N	Running	Starting	05:00	05:02
AGENT_ACTION - agentk reports it as Running	N	Running	Running	05:00	05:03

desired: Running / actual: Failed → desired: Stopped / actual: Stopped

Failed workspace is stopped by the user which results in a Stopped actual state.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
USER_ACTION - User stops the workspace	-	Stopped	Failed	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Stopped	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Stopping	N	Stopped	Stopping	05:02	05:04
AGENT_ACTION - agentk reports it as Stopped	N	Stopped	Stopped	05:02	05:05

desired: Running / actual: Failed → desired: Stopped / actual: Failed

Failed workspace is stopped by the user which results in a Failed actual state (for example, could not unmount the volume and stop the workspace).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
USER_ACTION - User stops the workspace	-	Stopped	Failed	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Stopped	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Failed	N	Stopped	Failed	05:02	05:04

desired: Running / actual: Failed → desired: Stopped / actual: Error

Failed workspace is stopped by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
USER_ACTION - User stops the workspace	-	Stopped	Failed	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Stopped	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Error	N	Stopped	Error	05:02	05:04

desired: Running / actual: Failed → desired: Terminated / actual: Terminated

Failed workspace is terminated by the user which results in a Terminated actual state.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Failed	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Terminated	N	Terminated	Terminated	05:02	05:04

desired: Running / actual: Failed → desired: Terminated / actual: Failed

Failed workspace is terminated by the user which results in a Failed actual state (for example, could not unmount volume and terminate the workspace).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Failed	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Failed	N	Terminated	Failed	05:02	05:04

desired: Running / actual: Failed → desired: Terminated / actual: Error

Failed workspace is terminated by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Failed	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Error	N	Terminated	Error	05:02	05:04

desired: Running / actual: Error → desired: Stopped / actual: Error

Error workspace is stopped by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

[!note] This transition might not be allowed.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Failed	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Error	N	Terminated	Error	05:02	05:04

desired: Running / actual: Error → desired: Terminated / actual: Error

Error workspace is terminated by the user which results in an Error actual state (for example, failed to apply Kubernetes resources).

[!note] This transition might not be allowed. Further evaluation is needed to determine if uncleaned state is left behind if this isn't allowed. Consider what happens if the workspace was never created in the first place, or if the workspace was successfully created but entered the Error state while it was being stopped.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Failed state	-	Running	Failed	05:00	05:01
USER_ACTION - User terminates the workspace	-	Terminated	Failed	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	Terminated	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Error	N	Terminated	Error	05:02	05:04

Other scenarios

Agent reports update for a workspace and user has also updated desired state of the workspace

This scenario shows when agentk is reporting on a workspace and the user has also performed an action on the workspace. This highlights that this logic works even in cases where there is new information on both sides (agent and Rails).

Details of the scenario:

• Workspace was earlier running
• Workspace has now started crashing (Failed state)
• User stops the workspace because they no longer need it (without being aware that the workspace has started crashing)

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
USER_ACTION - User stops the workspace	-	Stopped	Running	05:02	05:01
AGENT_ACTION - agentk reports it as Failed	Y	Stopped	Failed	05:02	05:03
AGENT_ACTION - agentk reports it as Stopping	N	Stopped	Stopping	05:02	05:04
AGENT_ACTION - agentk reports it as Stopped	N	Stopped	Stopped	05:02	05:05

Restarting a workspace

Running workspace is restarted by the user which results in a Running actual state.

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
User restarts the workspace	-	RestartRequested	Running	05:02	05:01
AGENT_ACTION - agentk reports no info	Y	RestartRequested	Running	05:02	05:03
AGENT_ACTION - agentk reports it as Stopping	N	RestartRequested	Stopping	05:02	05:04
AGENT_ACTION - agentk reports it as Stopped, desired_state automatically changed to Running	Y	Running	Stopped	05:05	05:05
AGENT_ACTION - agentk reports it as Starting	N	Running	Starting	05:05	05:07
AGENT_ACTION - agentk reports it as Running	N	Running	Running	05:05	05:08

No update for workspace from agentk or from user

Since Rails does not information about this workspace in the response to agentk:

• include deployment_resource_version in workspace_rails_info response? is set to N
• responded_to_agent_at is not updated

request	include config_to_apply in workspace_rails_info response?	desired_state	actual_state	desired_state_updated_at	responded_to_agent_at
CURRENT_DB_STATE - Workspace is in Running state	-	Running	Running	05:00	05:01
AGENT_ACTION - agentk reports no info	N	Running	Running	05:00	05:01

[!note] The Unknown actual state has not been modeled yet because when that would occur and what would happen is not known. Unknown is a fail-safe state which should never occur ideally.