Check if firewall exists before deleting

[zulh-civo]

Close #76

---

Here is the full logs when I destroy the resources in #76 using this branch. Look for Unable to find firewall 78d936aa-bd2c-4831-8f91-2df957332f3e - probably it's been deleted line. It will no longer throw an error.

$ tf destroy --auto-approve
2021-08-30T10:07:39.887+0800 [INFO]  Terraform version: 1.0.3
2021-08-30T10:07:39.887+0800 [INFO]  Go runtime version: go1.16.4
2021-08-30T10:07:39.887+0800 [INFO]  CLI args: []string{"/usr/local/bin/terraform", "destroy", "--auto-approve"}
2021-08-30T10:07:39.887+0800 [INFO]  Loading CLI configuration from /Users/zulh/.terraformrc
2021-08-30T10:07:39.888+0800 [INFO]  CLI command args: []string{"destroy", "--auto-approve"}
2021-08-30T10:07:39.964+0800 [INFO]  Failed to read plugin lock file .terraform/plugins/darwin_amd64/lock.json: open .terraform/plugins/darwin_amd64/lock.json: no such file or directory
2021-08-30T10:07:39.964+0800 [INFO]  backend/local: starting Apply operation
2021-08-30T10:07:39.965+0800 [INFO]  provider: configuring client automatic mTLS
2021-08-30T10:07:40.014+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: configuring server automatic mTLS: timestamp=2021-08-30T10:07:40.014+0800
2021-08-30T10:07:40.086+0800 [INFO]  terraform: building graph: GraphTypeValidate
2021-08-30T10:07:40.088+0800 [INFO]  provider: configuring client automatic mTLS
2021-08-30T10:07:40.135+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: configuring server automatic mTLS: timestamp=2021-08-30T10:07:40.135+0800
2021-08-30T10:07:40.212+0800 [INFO]  backend/local: apply calling Plan
2021-08-30T10:07:40.212+0800 [INFO]  terraform: building graph: GraphTypePlan
2021-08-30T10:07:40.214+0800 [INFO]  provider: configuring client automatic mTLS
2021-08-30T10:07:40.260+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: configuring server automatic mTLS: timestamp=2021-08-30T10:07:40.260+0800
2021-08-30T10:07:40.331+0800 [WARN]  ValidateProviderConfig from "provider[\"registry.terraform.io/civo/civo\"]" changed the config value, but that value is unused
civo_network.my_custom_network: Refreshing state... [id=9b2d3da4-baa0-482a-812e-1b6743ba9330]
2021-08-30T10:07:40.332+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:40 [INFO] retriving the network 9b2d3da4-baa0-482a-812e-1b6743ba9330: timestamp=2021-08-30T10:07:40.332+0800
2021-08-30T10:07:42.142+0800 [WARN]  Provider "registry.terraform.io/civo/civo" produced an invalid plan for civo_network.my_custom_network, but we are tolerating it because it is using the legacy plugin SDK.
    The following problems may be the cause of any confusing errors from downstream operations:
      - .region: planned value cty.StringVal("") for a non-computed attribute
civo_firewall.my_custom_firewall: Refreshing state... [id=78d936aa-bd2c-4831-8f91-2df957332f3e]
2021-08-30T10:07:42.146+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:42 [INFO] retriving the firewall 78d936aa-bd2c-4831-8f91-2df957332f3e: timestamp=2021-08-30T10:07:42.146+0800
2021-08-30T10:07:42.542+0800 [INFO]  ReferenceTransformer: reference not found: "civo_firewall.my_custom_firewall"
civo_firewall_rule.http: Refreshing state... [id=a200ad52-4b48-4251-8575-4bade7ed0952]
2021-08-30T10:07:42.544+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:42 [INFO] firewallID: 78d936aa-bd2c-4831-8f91-2df957332f3e: timestamp=2021-08-30T10:07:42.544+0800
2021-08-30T10:07:42.544+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:42 [INFO] RuleID: a200ad52-4b48-4251-8575-4bade7ed0952: timestamp=2021-08-30T10:07:42.544+0800
2021-08-30T10:07:42.544+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:42 [INFO] retriving the firewall rule a200ad52-4b48-4251-8575-4bade7ed0952: timestamp=2021-08-30T10:07:42.544+0800
civo_kubernetes_cluster.my_cluster: Refreshing state... [id=7345d915-5168-4fe2-b6f6-3c75fb946a50]
2021-08-30T10:07:42.548+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:42 [INFO] retrieving the kubernetes cluster 7345d915-5168-4fe2-b6f6-3c75fb946a50: timestamp=2021-08-30T10:07:42.548+0800
2021-08-30T10:07:43.552+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:43 [INFO] rules &{ID:a200ad52-4b48-4251-8575-4bade7ed0952 FirewallID:78d936aa-bd2c-4831-8f91-2df957332f3e Protocol:tcp StartPort:80 EndPort: Cidr:[] Direction: Label:web-server}: timestamp=2021-08-30T10:07:43.552+0800
2021-08-30T10:07:43.553+0800 [WARN]  Provider "registry.terraform.io/civo/civo" produced an unexpected new value for civo_firewall_rule.http during refresh.
      - .direction: was cty.StringVal("ingress"), but now cty.StringVal("")
2021-08-30T10:07:44.718+0800 [WARN]  Provider "registry.terraform.io/civo/civo" produced an invalid plan for civo_kubernetes_cluster.my_cluster, but we are tolerating it because it is using the legacy plugin SDK.
    The following problems may be the cause of any confusing errors from downstream operations:
      - .tags: planned value cty.StringVal("") for a non-computed attribute
2021-08-30T10:07:44.722+0800 [INFO]  terraform: building graph: GraphTypePlanDestroy
2021-08-30T10:07:44.723+0800 [INFO]  provider: configuring client automatic mTLS
2021-08-30T10:07:44.768+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: configuring server automatic mTLS: timestamp=2021-08-30T10:07:44.768+0800

Note: Objects have changed outside of Terraform

Terraform detected the following changes made outside of Terraform since the last "terraform apply":

  # civo_firewall_rule.http has been changed
  ~ resource "civo_firewall_rule" "http" {
      - direction   = "ingress" -> null
        id          = "a200ad52-4b48-4251-8575-4bade7ed0952"
        # (6 unchanged attributes hidden)
    }

Unless you have made equivalent changes to your configuration, or ignored the relevant attributes using ignore_changes, the following plan may include actions to undo or respond to these changes.

─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  - destroy

Terraform will perform the following actions:

  # civo_firewall.my_custom_firewall will be destroyed
  - resource "civo_firewall" "my_custom_firewall" {
      - id         = "78d936aa-bd2c-4831-8f91-2df957332f3e" -> null
      - name       = "my-custom-firewall" -> null
      - network_id = "9b2d3da4-baa0-482a-812e-1b6743ba9330" -> null
    }

  # civo_firewall_rule.http will be destroyed
  - resource "civo_firewall_rule" "http" {
      - cidr        = [
          - "",
        ] -> null
      - end_port    = "80" -> null
      - firewall_id = "78d936aa-bd2c-4831-8f91-2df957332f3e" -> null
      - id          = "a200ad52-4b48-4251-8575-4bade7ed0952" -> null
      - label       = "web-server" -> null
      - protocol    = "tcp" -> null
      - start_port  = "80" -> null
    }

  # civo_kubernetes_cluster.my_cluster will be destroyed
  - resource "civo_kubernetes_cluster" "my_cluster" {
      - api_endpoint           = "https://212.2.243.143:6443" -> null
      - created_at             = "2021-08-30 02:04:02 +0000 UTC" -> null
      - dns_entry              = "7345d915-5168-4fe2-b6f6-3c75fb946a50.k8s.civo.com" -> null
      - firewall_id            = "78d936aa-bd2c-4831-8f91-2df957332f3e" -> null
      - id                     = "7345d915-5168-4fe2-b6f6-3c75fb946a50" -> null
      - installed_applications = [] -> null
      - instances              = [
          - {
              - cpu_cores = 2
              - disk_gb   = 15
              - hostname  = "k3s-my-cluster-20130122-node-pool-91e4"
              - ram_mb    = 4096
              - size      = ""
              - status    = "ACTIVE"
              - tags      = []
            },
        ] -> null
      - kubeconfig             = (sensitive value)
      - kubernetes_version     = "1.20.0-k3s1" -> null
      - master_ip              = "212.2.243.143" -> null
      - name                   = "my_cluster" -> null
      - network_id             = "9b2d3da4-baa0-482a-812e-1b6743ba9330" -> null
      - num_target_nodes       = 1 -> null
      - pools                  = [
          - {
              - count          = 1
              - id             = "8ee0af9c-b600-4c06-a554-7fd4302eb51c"
              - instance_names = [
                  - "k3s-my-cluster-20130122-node-pool-91e4",
                ]
              - instances      = [
                  - {
                      - cpu_cores = 2
                      - disk_gb   = 15
                      - hostname  = "k3s-my-cluster-20130122-node-pool-91e4"
                      - ram_mb    = 4096
                      - size      = "g3.k3s.medium"
                      - status    = "ACTIVE"
                      - tags      = []
                    },
                ]
              - size           = "g3.k3s.medium"
            },
        ] -> null
      - ready                  = true -> null
      - status                 = "ACTIVE" -> null
      - target_nodes_size      = "g3.k3s.medium" -> null
    }

  # civo_network.my_custom_network will be destroyed
  - resource "civo_network" "my_custom_network" {
      - default = false -> null
      - id      = "9b2d3da4-baa0-482a-812e-1b6743ba9330" -> null
      - label   = "my-custom-network" -> null
      - name    = "cust-433e075e-a401-my-custom-network" -> null
    }

Plan: 0 to add, 0 to change, 4 to destroy.
2021-08-30T10:07:44.846+0800 [INFO]  backend/local: apply calling Apply
2021-08-30T10:07:44.846+0800 [INFO]  terraform: building graph: GraphTypeApply
2021-08-30T10:07:44.848+0800 [INFO]  provider: configuring client automatic mTLS
2021-08-30T10:07:44.895+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: configuring server automatic mTLS: timestamp=2021-08-30T10:07:44.895+0800
2021-08-30T10:07:44.967+0800 [WARN]  ValidateProviderConfig from "provider[\"registry.terraform.io/civo/civo\"]" changed the config value, but that value is unused
civo_firewall_rule.http: Destroying... [id=a200ad52-4b48-4251-8575-4bade7ed0952]
2021-08-30T10:07:44.968+0800 [INFO]  Starting apply for civo_firewall_rule.http
2021-08-30T10:07:44.969+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:44 [INFO] retriving the firewall rule a200ad52-4b48-4251-8575-4bade7ed0952: timestamp=2021-08-30T10:07:44.969+0800
civo_kubernetes_cluster.my_cluster: Destroying... [id=7345d915-5168-4fe2-b6f6-3c75fb946a50]
2021-08-30T10:07:44.969+0800 [INFO]  Starting apply for civo_kubernetes_cluster.my_cluster
2021-08-30T10:07:44.970+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:44 [INFO] deleting the kubernetes cluster 7345d915-5168-4fe2-b6f6-3c75fb946a50: timestamp=2021-08-30T10:07:44.970+0800
civo_firewall_rule.http: Destruction complete after 3s
civo_kubernetes_cluster.my_cluster: Destruction complete after 4s
civo_firewall.my_custom_firewall: Destroying... [id=78d936aa-bd2c-4831-8f91-2df957332f3e]
2021-08-30T10:07:49.213+0800 [INFO]  Starting apply for civo_firewall.my_custom_firewall
2021-08-30T10:07:49.214+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:49 [INFO] Checking if firewall 78d936aa-bd2c-4831-8f91-2df957332f3e exists: timestamp=2021-08-30T10:07:49.214+0800
2021-08-30T10:07:50.165+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:50 [INFO] Unable to find firewall 78d936aa-bd2c-4831-8f91-2df957332f3e - probably it's been deleted: timestamp=2021-08-30T10:07:50.165+0800
civo_firewall.my_custom_firewall: Destruction complete after 1s
civo_network.my_custom_network: Destroying... [id=9b2d3da4-baa0-482a-812e-1b6743ba9330]
2021-08-30T10:07:50.195+0800 [INFO]  Starting apply for civo_network.my_custom_network
2021-08-30T10:07:50.195+0800 [INFO]  provider.terraform-provider-civo_v99.0.0: 2021/08/30 10:07:50 [INFO] deleting the network 9b2d3da4-baa0-482a-812e-1b6743ba9330: timestamp=2021-08-30T10:07:50.195+0800
civo_network.my_custom_network: Destruction complete after 3s

Destroy complete! Resources: 4 destroyed.