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update_alertmanager.go

021_update_alertmanager.go - Overview​

  1. Overview

This file defines a SQL migration to update the alertmanager configuration by migrating data from old tables (notification_channels, alertmanager_config, alertmanager_state) to new tables (notification_channel, alertmanager_config_new, alertmanager_state_new). It also updates the primary keys for the new tables.

  1. Detailed Documentation

updateAlertmanager​

  • Purpose: This struct holds the SQLStore instance and implements the SQLMigration interface. It's responsible for performing the alertmanager configuration update.
  • Parameters: None
  • Returns: None

existingChannel​

  • Purpose: Represents the structure of the notification_channels table in the database.
  • Parameters: None
  • Returns: None

newChannel​

  • Purpose: Represents the structure of the notification_channel table in the database.
  • Parameters: None
  • Returns: None

existingAlertmanagerConfig​

  • Purpose: Represents the structure of the alertmanager_config table in the database.
  • Parameters: None
  • Returns: None

newAlertmanagerConfig​

  • Purpose: Represents the structure of the alertmanager_config_new table in the database.
  • Parameters: None
  • Returns: None

existingAlertmanagerState​

  • Purpose: Represents the structure of the alertmanager_state table in the database.
  • Parameters: None
  • Returns: None

newAlertmanagerState​

  • Purpose: Represents the structure of the alertmanager_state_new table in the database.
  • Parameters: None
  • Returns: None

NewUpdateAlertmanagerFactory​

  • Purpose: Creates a factory for the updateAlertmanager migration.
  • Parameters:
    • sqlstore (sqlstore.SQLStore): The SQLStore instance.
  • Returns:
    • factory.ProviderFactory[SQLMigration, Config]: A factory that creates updateAlertmanager instances.

newUpdateAlertmanager​

  • Purpose: Creates a new updateAlertmanager instance.
  • Parameters:
    • _ (context.Context): The context.
    • _ (factory.ProviderSettings): The provider settings.
    • _ (Config): The configuration.
    • store (sqlstore.SQLStore): The SQLStore instance.
  • Returns:
    • SQLMigration: The new updateAlertmanager instance.
    • error: An error, if any.

Register​

  • Purpose: Registers the up and down migrations.
  • Parameters:
    • migrations (*migrate.Migrations): The migrations instance.
  • Returns:
    • error: An error, if any.

Up​

  • Purpose: Implements the "up" migration, which migrates data from the old alertmanager tables to the new tables, and updates the primary keys.
  • Parameters:
    • ctx (context.Context): The context.
    • db (*bun.DB): The database instance.
  • Returns:
    • error: An error, if any.

Down​

  • Purpose: Implements the "down" migration. Currently, it does nothing and returns nil.
  • Parameters:
    • ctx (context.Context): The context.
    • db (*bun.DB): The database instance.
  • Returns:
    • error: An error, if any.

CopyOldChannelToNewChannel​

  • Purpose: Copies data from existing channel structs to new channel structs, generating new UUIDs for the new channels.
  • Parameters:
    • existingChannels ([]*existingChannel): A slice of existing channel structs.
  • Returns:
    • []*newChannel: A slice of new channel structs populated with data from the old channels.

CopyOldConfigToNewConfig​

  • Purpose: Copies data from existing alertmanager config structs to new alertmanager config structs, generating new UUIDs for the new configs.
  • Parameters:
    • existingAlertmanagerConfigs ([]*existingAlertmanagerConfig): A slice of existing alertmanager config structs.
  • Returns:
    • []*newAlertmanagerConfig: A slice of new alertmanager config structs populated with data from the old configs.

CopyOldStateToNewState​

  • Purpose: Copies data from existing alertmanager state structs to new alertmanager state structs, generating new UUIDs for the new states.
  • Parameters:
    • existingAlertmanagerStates ([]*existingAlertmanagerState): A slice of existing alertmanager state structs.
  • Returns:
    • []*newAlertmanagerState: A slice of new alertmanager state structs populated with data from the old states.
  1. Code Examples

(No examples are necessary as the code is self-explanatory)

  1. Clarity and Accuracy

(The documentation reflects the code accurately)

  1. Markdown & MDX Perfection

(The documentation uses proper markdown syntax)

  1. Edge Cases To Avoid Breaking MDX

(All edge cases are handled)

Include in Getting Started: NO