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Relax terraform-provider-ct version constraint

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* Allow terraform-provider-ct versions v0.6+ (e.g. v0.7.1)
Before, only v0.6.x point updates were allowed
* Update terraform-provider-ct to v0.7.1 in docs
* READ the docs before updating terraform-provider-ct,
as changing worker user-data is handled differently
by different cloud platforms
This commit is contained in:
Dalton Hubble
2020-11-25 14:48:08 -08:00
parent 22565e57e0
commit fa3184fb9c
28 changed files with 41 additions and 52 deletions
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39
docs/topics/maintenance.md
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@ -129,34 +129,22 @@ Typhoon supports multi-controller clusters, so it is possible to upgrade a clust
### Upgrade terraform-provider-ct
The [terraform-provider-ct](https://github.com/poseidon/terraform-provider-ct) plugin parses, validates, and converts Container Linux Configs into Ignition user-data for provisioning instances. Since Typhoon v1.12.2+, the plugin can be updated in-place so that on apply, only workers will be replaced.
Add the [terraform-provider-ct](https://github.com/poseidon/terraform-provider-ct) plugin binary for your system to `~/.terraform.d/plugins/`, noting the final name.
```sh
wget https://github.com/poseidon/terraform-provider-ct/releases/download/v0.5.0/terraform-provider-ct-v0.6.1-linux-amd64.tar.gz
tar xzf terraform-provider-ct-v0.6.1-linux-amd64.tar.gz
mv terraform-provider-ct-v0.6.1-linux-amd64/terraform-provider-ct ~/.terraform.d/plugins/terraform-provider-ct_v0.6.1
```
Binary names are versioned. This enables the ability to upgrade different plugins and have clusters pin different versions.
```
$ tree ~/.terraform.d/
/home/user/.terraform.d/
└── plugins
├── terraform-provider-ct_v0.2.1
├── terraform-provider-ct_v0.3.0
├── terraform-provider-ct_v0.6.1
└── terraform-provider-matchbox_v0.4.1
```
The [terraform-provider-ct](https://github.com/poseidon/terraform-provider-ct) plugin parses, validates, and converts Fedora CoreOS or Flatcar Linux Configs into Ignition user-data for provisioning instances. Since Typhoon v1.12.2+, the plugin can be updated in-place so that on apply, only workers will be replaced.
Update the version of the `ct` plugin in each Terraform working directory. Typhoon clusters managed in the working directory **must** be v1.12.2 or higher.
```tf
provider "ct" {
version = "0.6.1"
```diff
provider "ct" {}
terraform {
required_providers {
ct = {
source = "poseidon/ct"
- version = "0.6.1"
+ version = "0.7.1"
}
...
}
}
```
@ -169,7 +157,6 @@ terraform plan
Apply the change. Worker nodes' user-data will be changed and workers will be replaced. Rollout happens slightly differently on each platform:
#### AWS
AWS creates a new worker ASG, then removes the old ASG. New workers join the cluster and old workers disappear. `terraform apply` will hang during this process.