In this repository, I have documented my hands on experience with Terrafrom for the purpose of Container Engine for Kubernetes (aka OCI OKE) deployment. This set of HCL based Terraform files which can customized according to any requirements.
Clone the repo from github by executing the command as follows and then go to terraform-oci-oke directory:
[opc@terraform-server ~]$ git clone https://github.com/mlinxfeld/terraform-oci-oke.git
Cloning into 'terraform-oci-oke'...
remote: Enumerating objects: 10, done.
remote: Counting objects: 100% (10/10), done.
remote: Compressing objects: 100% (10/10), done.
remote: Total 10 (delta 0), reused 10 (delta 0), pack-reused 0
Unpacking objects: 100% (10/10), done.
[opc@terraform-server ~]$ cd terraform-oci-oke/
[opc@terraform-server terraform-oci-oke]$ ls -latr
-rw-r--r-- 1 opc opc 144 18 gru 2019 compartment.tf
-rw-r--r-- 1 opc opc 468 18 gru 2019 oke_kube_config.tf
-rw-r--r-- 1 opc opc 249 18 gru 2019 oke_policy.tf
drwxr-xr-x 58 opc opc 1856 13 sty 14:46 ..
-rw-r--r-- 1 opc opc 203 24 mar 12:25 provider.tf
-rw-r--r-- 1 opc opc 998 24 mar 12:45 variables.tf
-rw-r--r-- 1 opc opc 2368 24 mar 12:45 network.tf
-rw-r--r-- 1 opc opc 348 24 mar 12:47 datasources.tf
-rw-r--r-- 1 opc opc 1045 24 mar 12:47 outputs.tf
-rw-r--r-- 1 opc opc 1937 24 mar 12:47 oke_cluster.tf
drwxr-xr-x 14 opc opc 448 24 mar 13:32 .git
drwxr-xr-x 15 opc opc 480 24 mar 13:33 .
-rw-r--r--@ 1 opc opc 8296 24 mar 13:35 README.md
Within web browser go to URL: https://www.terraform.io/downloads.html. Find your platform and download the latest version of your terraform runtime. Add directory of terraform binary into PATH and check terraform version:
[opc@terraform-server terraform-oci-oke]$ export PATH=$PATH:/home/opc/terraform
[opc@terraform-server terraform-oci-oke]$ terraform --version
Terraform v0.12.16
Your version of Terraform is out of date! The latest version
is 0.12.17. You can update by downloading from https://www.terraform.io/downloads.html
Next create environment file with TF_VARs:
[opc@terraform-server terraform-oci-oke]$ vi setup_oci_tf_vars.sh
export TF_VAR_user_ocid="ocid1.user.oc1..aaaaaaaaob4qbf2(...)uunizjie4his4vgh3jx5jxa"
export TF_VAR_tenancy_ocid="ocid1.tenancy.oc1..aaaaaaaas(...)krj2s3gdbz7d2heqzzxn7pe64ksbia"
export TF_VAR_compartment_ocid="ocid1.tenancy.oc1..aaaaaaaasbktyckn(...)ldkrj2s3gdbz7d2heqzzxn7pe64ksbia"
export TF_VAR_fingerprint="00:f9:d1:41:bb:57(...)82:47:e6:00"
export TF_VAR_private_key_path="/tmp/oci_api_key.pem"
export TF_VAR_region="eu-frankfurt-1"
export TF_VAR_private_key_oci="/tmp/id_rsa"
export TF_VAR_public_key_oci="/tmp/id_rsa.pub"
[opc@terraform-server terraform-oci-oke]$ source setup_oci_tf_vars.sh
Run terraform init with upgrade option just to download the lastest neccesary providers:
[opc@terraform-server terraform-oci-oke]$ terraform init -upgrade
Initializing the backend...
Initializing provider plugins...
- Finding latest version of hashicorp/local...
- Finding latest version of hashicorp/oci...
- Installing hashicorp/oci v4.18.0...
- Installed hashicorp/oci v4.18.0 (signed by HashiCorp)
- Installing hashicorp/local v2.1.0...
- Installed hashicorp/local v2.1.0 (signed by HashiCorp)
Terraform has created a lock file .terraform.lock.hcl to record the provider
selections it made above. Include this file in your version control repository
so that Terraform can guarantee to make the same selections by default when
you run "terraform init" in the future.
Terraform has been successfully initialized!
You may now begin working with Terraform. Try running "terraform plan" to see
any changes that are required for your infrastructure. All Terraform commands
should now work.
If you ever set or change modules or backend configuration for Terraform,
rerun this command to reinitialize your working directory. If you forget, other
commands will detect it and remind you to do so if necessary.
Run terraform apply to provision the content of this repo (type yes to confirm the the apply phase):
[opc@terraform-server terraform-oci-oke]$ terraform apply
data.oci_containerengine_cluster_option.FoggyKitchenOKEClusterOption: Refreshing state...
data.oci_containerengine_node_pool_option.FoggyKitchenOKEClusterNodePoolOption: Refreshing state...
An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
+ create
<= read (data resources)
Terraform will perform the following actions:
# data.oci_containerengine_cluster_kube_config.FoggyKitchenKubeConfig will be read during apply
# (config refers to values not yet known)
<= data "oci_containerengine_cluster_kube_config" "FoggyKitchenKubeConfig" {
+ cluster_id = (known after apply)
+ content = (known after apply)
+ id = (known after apply)
+ token_version = "2.0.0"
}
(...)
Plan: 10 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
oci_identity_compartment.FoggyKitchenCompartment: Creating...
oci_identity_compartment.FoggyKitchenCompartment: Creation complete after 1s [id=ocid1.compartment.oc1..aaaaaaaagillnk7ttj6wpdhmewpibpxc5gbmrfxdtmaa3gfgjzbudesm3tsq]
oci_core_vcn.FoggyKitchenVCN: Creating...
(...)
local_file.FoggyKitchenKubeConfigFile: Creating...
local_file.FoggyKitchenKubeConfigFile: Creation complete after 0s [id=75873c1ec199bf2e88ba41b687f4e8b63616f5ac]
oci_containerengine_node_pool.FoggyKitchenOKENodePool: Creation complete after 7s [id=ocid1.nodepool.oc1.iad.aaaaaaaaaftdizbqgm2gkodggzsdmyjqgqytcolehazgcnlcgnzwcojzgbsd]
Apply complete! Resources: 10 added, 0 changed, 0 destroyed.
Outputs:
FoggyKitchenOKECluster = {
"id" = "ocid1.cluster.oc1.iad.aaaaaaaawxgqsiqjmwb7m3scdk3awgj4xjc6p3mzkusqc6zivcbpcau3dxya"
"kubernetes_version" = "v1.19.7"
"name" = "FoggyKitchenOKECluster"
}
FoggyKitchenOKENodePool = {
"id" = "ocid1.nodepool.oc1.iad.aaaaaaaaaftdizbqgm2gkodggzsdmyjqgqytcolehazgcnlcgnzwcojzgbsd"
"kubernetes_version" = "v1.19.7"
"name" = "FoggyKitchenOKENodePool"
"subnet_ids" = toset([
"ocid1.subnet.oc1.iad.aaaaaaaa2sy3vwoxfhvv4dgyamo36ofzz6yah37xoakbffk4pldzzre3eoma",
])
}
FoggyKitchen_Cluster_Kubernetes_Versions = [
tolist([
"v1.16.8",
"v1.16.15",
"v1.17.9",
"v1.17.13",
"v1.18.10",
"v1.19.7",
]),
]
FoggyKitchen_Cluster_NodePool_Kubernetes_Version = [
tolist([
"v1.16.8",
"v1.16.15",
"v1.17.9",
"v1.17.13",
"v1.18.10",
"v1.19.7",
]),
]
After testing the environment you can remove the OCI OKE infra. You should just run terraform destroy (type yes for confirmation of the destroy phase):
[opc@terraform-server terraform-oci-oke]$ terraform destroy
data.oci_containerengine_node_pool_option.FoggyKitchenOKEClusterNodePoolOption: Refreshing state...
(…)
An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
- destroy
Terraform will perform the following actions:
# local_file.FoggyKitchenKubeConfigFile will be destroyed
- resource "local_file" "FoggyKitchenKubeConfigFile" {
- content = <<~EOT
apiVersion: v1
clusters:
- cluster:
(…)
# oci_identity_compartment.FoggyKitchenCompartment will be destroyed
- resource "oci_identity_compartment" "FoggyKitchenCompartment" {
- compartment_id = "ocid1.tenancy.oc1..aaaaaaaasbktycknc4n4ja673cmnldkrj2s3gdbz7d2heqzzxn7pe64ksbia" -> null
- defined_tags = {} -> null
- description = "FoggyKitchen Compartment" -> null
- freeform_tags = {} -> null
- id = "ocid1.compartment.oc1..aaaaaaaagillnk7ttj6wpdhmewpibpxc5gbmrfxdtmaa3gfgjzbudesm3tsq" -> null
- is_accessible = true -> null
- name = "FoggyKitchenCompartment" -> null
- state = "ACTIVE" -> null
- time_created = "2019-12-02 19:22:17.767 +0000 UTC" -> null
}
Plan: 0 to add, 0 to change, 10 to destroy.
Do you really want to destroy all resources?
Terraform will destroy all your managed infrastructure, as shown above.
There is no undo. Only 'yes' will be accepted to confirm.
Enter a value: yes
(...)
oci_core_vcn.FoggyKitchenVCN: Destruction complete after 1s
oci_identity_compartment.FoggyKitchenCompartment: Destroying... [id=ocid1.compartment.oc1..aaaaaaaagillnk7ttj6wpdhmewpibpxc5gbmrfxdtmaa3gfgjzbudesm3tsq]
oci_identity_compartment.FoggyKitchenCompartment: Destruction complete after 0s
Destroy complete! Resources: 10 destroyed.