Make placement groups optional

group_vars/all.yml.example

@@ -31,7 +31,7 @@ chain_custom_environment:
     ETHEREUM_JSONRPC_TRACE_URL: "http://localhost:8545" # Network RPC endpoint in trace mode. Can be the same as the previous variable
     ETHEREUM_JSONRPC_WS_URL: "ws://localhost:8546" # Network RPC endpoint in websocket mode
     NETWORK_PATH: "/poa/core" # relative URL path, for example: blockscout.com/$NETWORK_PATH
-    SECRET_KEY_BASE: "TPGMvGK0iIwlXBQuQDA5KRqk77VETbEBlG4gAWeb93TvBsYAjvoAvdODMd6ZeguPwf2YTRY3n7uvxXzQP4WayQ==" # Secret key for production assets protection. Use mix phx.gen.secret to generate
+    SECRET_KEY_BASE: "TPGMvGK0iIwlXBQuQDA5KRqk77VETbEBlG4gAWeb93TvBsYAjvoAvdODMd6ZeguPwf2YTRY3n7uvxXzQP4WayQ==" # Secret key for production assets protection. Use `mix phx.gen.secret` or `openssl rand -base64 64 | tr -d '\n'` to generate
     CHECK_ORIGIN: false # Used to check the origin of requests when the origin header is present
     PORT: 4000 # Port the application runs on
     COIN: "POA" # Coin name at the Coinmarketcap, used to display current exchange rate

group_vars/infrastructure.yml.example

@@ -34,6 +34,9 @@ pool_size: 30
 ## The following variable represents the elixir version that will be used to run BlockScout instance. Will be used to download the Elixir at the following link: https://github.com/elixir-lang/elixir/releases/download/{{ elixir_version }}/Precompiled.zip
 elixir_version: "v1.7.4"
 
+## Whether or not to use the placement group for the BlockScout instances.
+use_placement_group: false
+
 # DB related variables
 
 ## This value represents the name of the DB that will be created/attached. Must be unique. Will be prefixed with `prefix` variable.

roles/check/tasks/main.yml

@@ -7,7 +7,7 @@
   fail:
     msg: "The prefix '{{ item }}' is invalid. It must consist only of the lowercase characters a-z and digits 0-9, and must not more than 5 characters long."
   when: item.key|length > 5 or item.key is not match("^[a-z0-9]+$")
-  with_dict: "{{ chains }}"
+  with_dict: "{{ chain_custom_environment }}"
 
 - name: Check if terraform is installed
   command: which terraform

roles/main_infra/files/hosts.tf

@@ -40,7 +40,7 @@ resource "aws_launch_configuration" "explorer" {
 }
 
 resource "aws_placement_group" "explorer" {
-  count    = "${length(var.chains)}"
+  count    = "${var.use_placement_group ? length(var.chains): 0}"
   name     = "${var.prefix}-explorer-placement-group${count.index}"
   strategy = "cluster"
 }
@@ -51,7 +51,7 @@ resource "aws_autoscaling_group" "explorer" {
   max_size             = "${length(var.chains) * 4}"
   min_size             = "${length(var.chains)}"
   desired_capacity     = "${length(var.chains)}"
-  placement_group      = "${aws_placement_group.explorer.*.id[count.index]}"
+  placement_group      = "${var.use_placement_group ? aws_placement_group.explorer.*.id[count.index] : "zero"}"
   launch_configuration = "${aws_launch_configuration.explorer.name}"
   vpc_zone_identifier  = ["${aws_subnet.default.id}"]
   availability_zones   = ["${data.aws_availability_zones.available.names}"]
@@ -69,25 +69,7 @@ resource "aws_autoscaling_group" "explorer" {
   ]
 
   depends_on = [
-    "aws_ssm_parameter.new_relic_app_name",
-    "aws_ssm_parameter.new_relic_license_key",
-    "aws_ssm_parameter.pool_size",
-    "aws_ssm_parameter.ecto_use_ssl",
-    "aws_ssm_parameter.exq_blocks_concurrency",
-    "aws_ssm_parameter.exq_concurrency",
-    "aws_ssm_parameter.exq_internal_transactions_concurrency",
-    "aws_ssm_parameter.exq_receipts_concurrency",
-    "aws_ssm_parameter.exq_transactions_concurrency",
-    "aws_ssm_parameter.secret_key_base",
-    "aws_ssm_parameter.port",
-    "aws_ssm_parameter.db_username",
-    "aws_ssm_parameter.db_password",
-    "aws_ssm_parameter.db_host",
-    "aws_ssm_parameter.db_port",
-    "aws_ssm_parameter.ethereum_url",
-    "aws_ssm_parameter.trace_url",
-    "aws_ssm_parameter.ws_url",
-    "aws_ssm_parameter.network_path",
+    "aws_ssm_parameter.db_host"
   ]
 
   lifecycle {

roles/main_infra/files/variables.tf

@@ -9,44 +9,14 @@ variable "instance_type" {}
 variable "root_block_size" {}
 variable "pool_size" {}
 variable "elixir_version" {}
-
+variable "use_placement_group" {}
 variable "key_content" {
   default = ""
 }
 
-variable "chain_jsonrpc_variant" {
-  default = {}
-}
 variable "chains" {
   default = {}
 }
-variable "chain_trace_endpoint" {
-  default = {}
-}
-variable "chain_ws_endpoint" {
-  default = {}
-}
-variable "chain_logo" {
-  default = {}
-}
-variable "chain_coin" {
-  default = {}
-}
-variable "chain_network" {
-  default = {}
-}
-variable "chain_subnetwork" {
-  default = {}
-}
-variable "chain_network_path" {
-  default = {}
-}
-variable "chain_network_icon" {
-  default = {}
-}
-variable "chain_graphiql_transaction" {
-  default = {}
-}
 
 variable "chain_db_id" {
   default = {}
@@ -84,25 +54,11 @@ variable "chain_db_version" {
   default = {}
 }
 
-variable "new_relic_app_name" {}
-variable "new_relic_license_key" {}
-variable "secret_key_base" {}
+variable "secret_key_base" {
+default = {} 
+}
 variable "alb_ssl_policy" {}
 variable "alb_certificate_arn" {}
-variable "use_ssl" {}
-
-variable "chain_block_transformer" {
-  default = {}
-}
-
-variable "chain_heart_beat_timeout" {
-  default = {}
-}
-
-variable "chain_heart_command" {
-  default = {}
-}
-
-variable "chain_blockscout_version" {
+variable "use_ssl" {
 default = {} 
 }

roles/main_infra/tasks/main.yml

@@ -55,6 +55,13 @@
     prompt: "Are you absolutely sure you want to execute the deployment plan shown above? [False]"
   register: user_answer
 
+- name: Insert vars into parameter store
+  include: parameter_store.yml
+  loop: "{{ chain_custom_environment.keys() }}"
+  loop_control:
+    loop_var: chain
+    index_var: index
+
 - name: Terraform provisioning
   shell: "echo yes | {{ terraform_location }} apply" 
   args:
@@ -75,13 +82,6 @@
     chdir: "roles/main_infra/files"
   when: user_answer.user_input|bool == True
 
-- name: Use role in loop
-  include: parameter_store.yml
-  loop: "{{ chain_custom_environment.keys() }}"
-  loop_control:
-    loop_var: chain
-    index_var: index
-
 - name: Output info from Terraform
   debug:
     value: output.stdout_lines.instructions.value

roles/main_infra/tasks/parameter_store.yml

@@ -1,6 +1,6 @@
 - name: Prepare variables for Parameter Store
   set_fact:
-    chain_upper_env: "{{ chain_ps_env | combine ({item.key|lower : item.value})  }}"
+    chain_ps_env: "{{ chain_ps_env | combine ({item.key|lower : item.value})  }}"
   with_dict: "{{ chain_custom_environment[chain] }}"
   vars:
     chain_ps_env: {}

roles/main_infra/templates/terraform.tfvars.j2

@@ -8,7 +8,7 @@ db_subnet_cidr        = "{{ db_subnet_cidr }}"
 dns_zone_name         = "{{ dns_zone_name }}"
 instance_type         = "{{ instance_type }}"
 root_block_size       = "{{ root_block_size }}"
-
+use_placement_group   = "{{ use_placement_group }}"
 alb_ssl_policy        = "{{ alb_ssl_policy }}"
 alb_certificate_arn   = "{{ alb_certificate_arn }}"
 elixir_version        = "{{ elixir_version }}"