133 lines
6.2 KiB
Markdown
133 lines
6.2 KiB
Markdown
# Cloud SQL instance with read replicas
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This module manages the creation of Cloud SQL instances with potential read replicas in other regions. It can also create an initial set of users and databases via the `users` and `databases` parameters.
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Note that this module assumes that some options are the same for both the primary instance and all the replicas (e.g. tier, disks, labels, flags, etc).
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*Warning:* if you use the `users` field, you terraform state will contain each user's password in plain text.
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## Simple example
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This example shows how to setup a project, VPC and a standalone Cloud SQL instance.
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```hcl
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module "project" {
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source = "./modules/project"
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billing_account = var.billing_account_id
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parent = var.organization_id
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name = "my-db-project"
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services = [
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"servicenetworking.googleapis.com"
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]
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}
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module "vpc" {
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source = "./modules/net-vpc"
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project_id = module.project.project_id
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name = "my-network"
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private_service_networking_range = "10.60.0.0/16"
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}
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module "db" {
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source = "./modules/cloudsql-instance"
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project_id = module.project.project_id
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network = module.vpc.self_link
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name = "db"
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region = "europe-west1"
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database_version = "POSTGRES_13"
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tier = "db-g1-small"
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}
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# tftest:modules=3:resources=6
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```
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## Cross-regional read replica
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```hcl
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module "db" {
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source = "./modules/cloudsql-instance"
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project_id = var.project_id
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network = var.vpc.self_link
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name = "db"
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region = "europe-west1"
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database_version = "POSTGRES_13"
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tier = "db-g1-small"
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replicas = {
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replica1 = "europe-west3"
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replica2 = "us-central1"
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}
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}
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# tftest:modules=1:resources=3
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```
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## Custom flags, databases and users
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```hcl
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module "db" {
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source = "./modules/cloudsql-instance"
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project_id = var.project_id
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network = var.vpc.self_link
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name = "db"
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region = "europe-west1"
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database_version = "MYSQL_8_0"
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tier = "db-g1-small"
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flags = {
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disconnect_on_expired_password = "on"
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}
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databases = [
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"people",
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"departments"
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]
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users = {
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# generatea password for user1
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user1 = null
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# assign a password to user2
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user2 = "mypassword"
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}
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}
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# tftest:modules=1:resources=6
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```
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<!-- BEGIN TFDOC -->
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## Variables
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| name | description | type | required | default |
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|---|---|:---: |:---:|:---:|
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| database_version | Database type and version to create. | <code title="">string</code> | ✓ | |
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| name | Name of primary replica. | <code title="">string</code> | ✓ | |
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| network | VPC self link where the instances will be deployed. Private Service Networking must be enabled and configured in this VPC. | <code title="">string</code> | ✓ | |
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| project_id | The ID of the project where this instances will be created. | <code title="">string</code> | ✓ | |
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| region | Region of the primary replica. | <code title="">string</code> | ✓ | |
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| tier | The machine type to use for the instances. | <code title="">string</code> | ✓ | |
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| *authorized_networks* | Map of NAME=>CIDR_RANGE to allow to connect to the database(s). | <code title="map(string)">map(string)</code> | | <code title="">null</code> |
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| *availability_type* | Availability type for the primary replica. Either `ZONAL` or `REGIONAL` | <code title="">string</code> | | <code title="">ZONAL</code> |
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| *backup_configuration* | Backup settings for primary instance. Will be automatically enabled if using MySQL with one or more replicas | <code title="object({ enabled = bool binary_log_enabled = bool start_time = string location = string log_retention_days = number retention_count = number })">object({...})</code> | | <code title="{ enabled = false binary_log_enabled = false start_time = "23:00" location = "EU" log_retention_days = 7 retention_count = 7 }">...</code> |
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| *databases* | Databases to create once the primary instance is created. | <code title="list(string)">list(string)</code> | | <code title="">null</code> |
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| *deletion_protection* | Allow terraform to delete instances. | <code title="">bool</code> | | <code title="">false</code> |
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| *disk_size* | Disk size in GB. Set to null to enable autoresize. | <code title="">number</code> | | <code title="">null</code> |
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| *disk_type* | The type of data disk: `PD_SSD` or `PD_HDD`. | <code title="">string</code> | | <code title="">PD_SSD</code> |
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| *flags* | Map FLAG_NAME=>VALUE for database-specific tuning. | <code title="map(string)">map(string)</code> | | <code title="">null</code> |
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| *labels* | Labels to be attached to all instances. | <code title="map(string)">map(string)</code> | | <code title="">null</code> |
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| *prefix* | Prefix used to generate instance names. | <code title="">string</code> | | <code title="">null</code> |
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| *replicas* | Map of NAME=>REGION for additional read replicas. Set to null to disable replica creation. | <code title="map(any)">map(any)</code> | | <code title="">null</code> |
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| *users* | Map of users to create in the primary instance (and replicated to other replicas) in the format USER=>PASSWORD. For MySQL, anything afterr the first `@` (if persent) will be used as the user's host. Set PASSWORD to null if you want to get an autogenerated password | <code title="map(string)">map(string)</code> | | <code title="">null</code> |
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## Outputs
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| name | description | sensitive |
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|---|---|:---:|
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| connection_name | Connection name of the primary instance | |
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| connection_names | Connection names of all instances | |
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| id | ID of the primary instance | |
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| ids | IDs of all instances | |
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| instances | Cloud SQL instance resources | ✓ |
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| ip | IP address of the primary instance | |
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| ips | IP addresses of all instances | |
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| self_link | Self link of the primary instance | |
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| self_links | Self links of all instances | |
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| user_passwords | Map of containing the password of all users created through terraform. | ✓ |
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<!-- END TFDOC -->
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