Difference between revisions of "Terraform Operations"

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==AWS Operations==
 
==AWS Operations==
 
{{Internal|Terraform AWS Operations|Terraform AWS Operations}}
 
{{Internal|Terraform AWS Operations|Terraform AWS Operations}}
 +
 +
=Logs=
 +
 +
/tmp/terraform-log402289911

Latest revision as of 02:57, 4 December 2019

Internal

Version

terraform version

Help

terraform --help
terraform <command> --help

Initialization

The initialization operation initializes various local settings that will be used by subsequent commands.

The command also downloads provider binaries and, if any modules are used, the module source. The command needs to be re-run if new modules are set or changed, or backend configuration changes.

terraform init

The command creates a .terraform directory, which contains a "plugins" sub-directory.

-upgrade

The -upgrade option will additionally check for any newer versions of existing modules and providers that may be available.

Configuration File Formatting

terraform fmt

Formats all .tf in the current directory. It aligns equals, etc. Formatting enables standardization.

Validation

terraform validate

Plan

Apply

https://www.terraform.io/docs/commands/apply.html
terraform apply

The output shows the execution plan, in a format similar to diff.

-/+ means the resource will be destroyed and recreated rather than update it in-place. ~ means update in-place.

An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # aws_instance.terraform-test-01 will be created
  + resource "aws_instance" "terraform-test-01" {
      + ami                          = "ami-a6faba49dddaecfb7"
      + arn                          = (known after apply)
      + associate_public_ip_address  = (known after apply)
      + availability_zone            = (known after apply)
      + cpu_core_count               = (known after apply)
      + cpu_threads_per_core         = (known after apply)
      + get_password_data            = false
      + host_id                      = (known after apply)
      + id                           = (known after apply)
      + instance_state               = (known after apply)
      + instance_type                = "m5.4xlarge"
      + ipv6_address_count           = (known after apply)
      + ipv6_addresses               = (known after apply)
      + key_name                     = (known after apply)
      + network_interface_id         = (known after apply)
      + password_data                = (known after apply)
      + placement_group              = (known after apply)
      + primary_network_interface_id = (known after apply)
      + private_dns                  = (known after apply)
      + private_ip                   = (known after apply)
      + public_dns                   = (known after apply)
      + public_ip                    = (known after apply)
      + security_groups              = (known after apply)
      + source_dest_check            = true
      + subnet_id                    = (known after apply)
      + tenancy                      = (known after apply)
      + volume_tags                  = (known after apply)
      + vpc_security_group_ids       = (known after apply)

      + ebs_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + snapshot_id           = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }

      + ephemeral_block_device {
          + device_name  = (known after apply)
          + no_device    = (known after apply)
          + virtual_name = (known after apply)
        }

      + network_interface {
          + delete_on_termination = (known after apply)
          + device_index          = (known after apply)
          + network_interface_id  = (known after apply)
        }

      + root_block_device {
          + delete_on_termination = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }
    }

Plan: 1 to add, 0 to change, 0 to destroy.

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

aws_instance.terraform-test-01: Creating...
aws_instance.terraform-test-01: Still creating... [10s elapsed]
aws_instance.terraform-test-01: Still creating... [20s elapsed]
aws_instance.terraform-test-01: Creation complete after 24s [id=i-afbbc2c4a789ab871]

Apply Options

-auto-approve

Skip interactive approval of plan before applying.

Show

terraform show

Shows the state. It contain interesting information obtained after installation, such as IP addresses, etc.

It also shows content of terraform.tfstate state file.

Output

Used to extract the value of an output variable from the state file.

All variables are extracted with:

terraform output

A specific variable is extracted with:

terraform output <output-var-name>

Options

-json

-no-color

Import

Instances can be imported using their ID:

terraform import aws_instance.web i-00000000000

Destroy

https://learn.hashicorp.com/terraform/getting-started/destroy#destroy
terraform destroy

State

https://www.terraform.io/docs/commands/state/index.html

Advanced state management.

terraform state

Provider-Specific Operations

AWS Operations

Terraform AWS Operations

Logs

/tmp/terraform-log402289911