fix: handle placement_ads for 1 AD regions. (#581)

Added additional examples for other nodepool parameters

Resolves #577

Signed-off-by: Ali Mukadam <[email protected]>

Signed-off-by: Ali Mukadam <[email protected]>

Author: hyder

docs/terraformoptions.adoc

@@ -758,15 +758,20 @@ EOT
 |31
 
 |node_pools
-|The number, shape of node pools and node_pool_size to create. Each key and tuple pair corresponds to 1 node pool.
+|The number, shape of node pool, node_pool_size to create. Use this input variable to also set other nodepool parameters. See terraform.tfvars.example. Each key and tuple pair corresponds to 1 node pool that will be created. 
 
 Refer to {uri-topology}[topology] for more thorough examples.
 |e.g.
 
 node_pools = {
-np1 = { shape = "VM.Standard.E4.Flex", ocpus = 1, memory = 16, node_pool_size = 1, boot_volume_size = 150, label = { app = "frontend", pool = "np1" } }
-  np2 = {shape="VM.Standard.E2.2",node_pool_size=2,boot_volume_size=150,label={app="application",name="test"}}
-  np3 = {shape="VM.Standard.E2.2",node_pool_size=1,placement_ads=[1]} 
+  # Basic node pool
+  np1 = {
+    shape            = "VM.Standard.E4.Flex",
+    ocpus            = 2,
+    memory           = 32,
+    node_pool_size   = 1,
+    boot_volume_size = 150,
+  } 
 } 
 |{}
 

modules/oke/nodepools.tf

@@ -20,10 +20,15 @@ resource "oci_containerengine_node_pool" "nodepools" {
     kms_key_id = var.node_pool_volume_kms_key_id
 
     # iterating over ADs
+    ## If placement_ads are specified, use them.
+    ## Else, iterate over all ADs.
+    ## If a single AD region is used, pick the only AD returned from the data source.
+    
     dynamic "placement_configs" {
       iterator = ad_iterator
       for_each = [for n in lookup(each.value, "placement_ads", local.ad_numbers) :
-      local.ad_number_to_name[n]]
+        length(local.ad_numbers) == 1 ? local.ad_number_to_name[1] : local.ad_number_to_name[n]
+      ]
       content {
         availability_domain = ad_iterator.value
         subnet_id           = var.cluster_subnets["workers"]

terraform.tfvars.example

@@ -179,20 +179,96 @@ image_signing_keys = []
 check_node_active = "all"
 enable_pv_encryption_in_transit = false
 node_pools = {
-  np1 = { shape = "VM.Standard.E4.Flex", ocpus = 1, memory = 16, node_pool_size = 1, boot_volume_size = 150, label = { app = "frontend", pool = "np1" }, nodepool_freeform_tags = { app = "frontend", pool = "np1" }, nodepool_defined_tags = { "Operations.CostCenter" = "42" } }
-  np2 = { shape = "VM.Standard.E4.Flex", ocpus = 1, memory = 16, node_pool_size = 1, boot_volume_size = 150, label = { app = "frontend", pool = "np2" } }
-  # np3 = { shape = "VM.Standard.E4.Flex", ocpus = 1, memory = 16, node_pool_size = 1, boot_volume_size = 150, label = { app = "frontend", pool = "np1" } }
-  # np4 = { shape = "VM.Standard.E4.Flex", ocpus = 1, memory = 16, node_pool_size = 1, placement_ads = [1] }
-  # np2 = {shape="VM.Standard.E4.Flex",ocpus=4,memory=16,node_pool_size=1,boot_volume_size=150, label={app="backend",pool="np2"}}
-  # np3 = {shape="VM.Standard.A1.Flex",ocpus=8,memory=16,node_pool_size=1,boot_volume_size=150, label={pool="np3"}}
-  # np4 = {shape="BM.Standard2.52",node_pool_size=1,boot_volume_size=150}
-  # np5 = {shape="VM.Optimized3.Flex",node_pool_size=6}
-  # np5 = {shape="BM.Standard.A1.160",node_pool_size=6}
-  # np6 = {shape="VM.Standard.E2.2", node_pool_size=5}
-  # np7 = {shape="BM.DenseIO2.52", node_pool_size=5}
-  # np8 = {shape="BM.GPU3.8", node_pool_size=1}
-  # np9 = {shape="BM.GPU4.8", node_pool_size=5}
-  # np10 = {shape="BM.HPC2.36	", node_pool_size=5}
+  # Basic node pool
+  np1 = {
+    shape            = "VM.Standard.E4.Flex",
+    ocpus            = 2,
+    memory           = 32,
+    node_pool_size   = 1,
+    boot_volume_size = 150,
+  }
+  # # node pool with initial node labels
+  # np2 = {
+  #   shape            = "VM.Standard.E4.Flex",
+  #   ocpus            = 2,
+  #   memory           = 32,
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  #   label            = { app = "frontend", pool = "np2" },
+  # }
+  # # node pool with freeform tags 
+  # np3 = {
+  #   shape                  = "VM.Standard.E4.Flex",
+  #   ocpus                  = 2,
+  #   memory                 = 32,
+  #   node_pool_size         = 1,
+  #   boot_volume_size       = 150,
+  #   nodepool_freeform_tags = { app = "frontend", pool = "np2" },
+  #   node_freeform_tags     = { app = "frontend", nodes = "np2" },
+  # }
+  # # node pool with defined tags
+  # np4 = {
+  #   shape                 = "VM.Standard.E4.Flex",
+  #   ocpus                 = 2,
+  #   memory                = 32,
+  #   node_pool_size        = 1,
+  #   boot_volume_size      = 150,
+  #   nodepool_defined_tags = { "cn.environment" = "prod" },
+  #   node_defined_tags     = { "cn.environment" = "prod" },
+  # }
+  # # node pool with placement ads
+  # np5 = {
+  #   shape            = "VM.Standard.E4.Flex",
+  #   ocpus            = 2,
+  #   memory           = 32,
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  #   placement_ads    = [1]
+  # }
+  # # node pool using ARM Flex shape
+  # np6 = {
+  #   shape            = "VM.Standard.A1.Flex",
+  #   ocpus            = 2,
+  #   memory           = 32,
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  # }
+  # # node pool using Baremetal X86_64
+  # np7 = {
+  #   shape            = "BM.Standard2.52",
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  # }
+  # # node pool using Baremetal ARM
+  # np8 = {
+  #   shape            = "BM.Standard.A1.160",
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  # }
+  # # node pool using Optimized Flex
+  # np9 = {
+  #   shape            = "VM.Optimized3.Flex",
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  # }
+  # # node pool using DenseIO2
+  # np9 = {
+  #   shape            = "BM.DenseIO2.52",
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  # }
+  # # node pool using BM.GPU3.8
+  # np10 = {
+  #   shape            = "BM.GPU3.8",
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  # }
+  # # node pool using BM.GPU4.8
+  # np11 = {
+  #   shape            = "BM.GPU4.8",
+  #   node_pool_size   = 1,
+  #   boot_volume_size = 150,
+  # }
 }
 node_pool_image_id    = "none"
 node_pool_image_type  = "oke"