feat(terraform): Refactor Alertmanager

- prepare for ETL

Signed-off-by: Peter Mikus <pmikus@cisco.com>
Change-Id: I8931f76f78b5acee39716398b92e4b107d399773

8 files changed, 305 insertions, 160 deletions

diff --git a/fdio.infra.terraform/1n_nmd/alertmanager/conf/nomad/alertmanager.hcl b/fdio.infra.terraform/1n_nmd/alertmanager/conf/nomad/alertmanager.hcl.tftpl
index ab92761ac2..d1bb8e85cd 100644
--- a/fdio.infra.terraform/1n_nmd/alertmanager/conf/nomad/alertmanager.hcl
+++ b/fdio.infra.terraform/1n_nmd/alertmanager/conf/nomad/alertmanager.hcl.tftpl
@@ -1,28 +1,26 @@
 job "${job_name}" {
   # The "region" parameter specifies the region in which to execute the job.
   # If omitted, this inherits the default region name of "global".
-  # region = "global"
-  #
+  # region    = "${region}"
+
   # The "datacenters" parameter specifies the list of datacenters which should
   # be considered when placing this task. This must be provided.
-  datacenters         = "${datacenters}"
+  datacenters = "${datacenters}"
 
   # The "type" parameter controls the type of job, which impacts the scheduler's
   # decision on placement. This configuration is optional and defaults to
   # "service". For a full list of job types and their differences, please see
   # the online documentation.
   #
-  # For more information, please see the online documentation at:
-  #
   #     https://www.nomadproject.io/docs/jobspec/schedulers
   #
-  type                = "service"
+  type        = "service"
 
   update {
     # The "max_parallel" parameter specifies the maximum number of updates to
     # perform in parallel. In this case, this specifies to update a single task
     # at a time.
-    max_parallel      = 1
+    max_parallel      = ${max_parallel}
 
     health_check      = "checks"
 
@@ -56,46 +54,51 @@ job "${job_name}" {
     # Further, setting "canary" equal to the count of the task group allows
     # blue/green deployments. When the job is updated, a full set of the new
     # version is deployed and upon promotion the old version is stopped.
-    canary            = 1
+    canary            = ${canary}
 
     # Specifies if the job should auto-promote to the canary version when all
     # canaries become healthy during a deployment. Defaults to false which means
     # canaries must be manually updated with the nomad deployment promote
     # command.
-    auto_promote      = true
+    auto_promote      = ${auto_promote}
 
     # The "auto_revert" parameter specifies if the job should auto-revert to the
     # last stable job on deployment failure. A job is marked as stable if all the
     # allocations as part of its deployment were marked healthy.
-    auto_revert       = true
+    auto_revert       = ${auto_revert}
 %{ endif }
   }
 
-  # The reschedule stanza specifies the group's rescheduling strategy. If
-  # specified at the job level, the configuration will apply to all groups
-  # within the job. If the reschedule stanza is present on both the job and the
-  # group, they are merged with the group stanza taking the highest precedence
-  # and then the job.
-  reschedule {
-    delay             = "30s"
-    delay_function    = "constant"
-    unlimited         = true
+  # All groups in this job should be scheduled on different hosts.
+  constraint {
+    operator = "distinct_hosts"
+    value    = "true"
   }
 
   # The "group" stanza defines a series of tasks that should be co-located on
   # the same Nomad client. Any task within a group will be placed on the same
   # client.
   #
-  # For more information and examples on the "group" stanza, please see
-  # the online documentation at:
-  #
   #     https://www.nomadproject.io/docs/job-specification/group
   #
-  group "prod-group1-${service_name}" {
+  group "${job_name}-group-1" {
     # The "count" parameter specifies the number of the task groups that should
     # be running under this group. This value must be non-negative and defaults
     # to 1.
-    count             = ${group_count}
+    count = ${group_count}
+
+    # The volume stanza allows the group to specify that it requires a given
+    # volume from the cluster. The key of the stanza is the name of the volume
+    # as it will be exposed to task configuration.
+    #
+    # https://www.nomadproject.io/docs/job-specification/volume
+    %{ if use_host_volume }
+    volume "${job_name}-volume-1" {
+      type      = "host"
+      read_only = false
+      source    = "${volume_source}"
+    }
+    %{ endif }
 
     # The restart stanza configures a tasks's behavior on task failure. Restarts
     # happen on the client that is running the task.
@@ -103,57 +106,75 @@ job "${job_name}" {
     # https://www.nomadproject.io/docs/job-specification/restart
     #
     restart {
-      interval  = "30m"
-      attempts  = 40
-      delay     = "15s"
-      mode      = "delay"
+      interval = "30m"
+      attempts = 40
+      delay    = "15s"
+      mode     = "delay"
     }
 
     # The constraint allows restricting the set of eligible nodes. Constraints
     # may filter on attributes or client metadata.
     #
-    # For more information and examples on the "volume" stanza, please see
-    # the online documentation at:
-    #
     #     https://www.nomadproject.io/docs/job-specification/constraint
     #
     constraint {
-      attribute       = "$${attr.cpu.arch}"
-      operator        = "!="
-      value           = "arm64"
+      attribute = "$${attr.cpu.arch}"
+      operator  = "!="
+      value     = "arm64"
     }
 
     constraint {
-      attribute      = "$${node.class}"
-      value          = "builder"
+      attribute = "$${node.class}"
+      value     = "builder"
+    }
+
+    # The network stanza specifies the networking requirements for the task
+    # group, including the network mode and port allocations. When scheduling
+    # jobs in Nomad they are provisioned across your fleet of machines along
+    # with other jobs and services. Because you don't know in advance what host
+    # your job will be provisioned on, Nomad will provide your tasks with
+    # network configuration when they start up.
+    #
+    #     https://www.nomadproject.io/docs/job-specification/network
+    #
+    network {
+      port "${service_name}" {
+        static = ${port}
+        to     = ${port}
+      }
     }
 
     # The "task" stanza creates an individual unit of work, such as a Docker
     # container, web application, or batch processing.
     #
-    # For more information and examples on the "task" stanza, please see
-    # the online documentation at:
-    #
     #     https://www.nomadproject.io/docs/job-specification/task
     #
-    task "prod-task1-${service_name}" {
+    task "${job_name}-task-1" {
       # The "driver" parameter specifies the task driver that should be used to
       # run the task.
-      driver          = "exec"
+      driver = "exec"
+
+    %{ if use_host_volume }
+      volume_mount {
+        volume      = "${job_name}-volume-1"
+        destination = "${volume_destination}"
+        read_only   = false
+      }
+    %{ endif }
 
-      %{ if use_vault_provider }
+    %{ if use_vault_provider }
       vault {
-        policies        = "${vault_kv_policy_name}"
+        policies = "${vault_kv_policy_name}"
       }
-      %{ endif }
+    %{ endif }
 
       # The "config" stanza specifies the driver configuration, which is passed
       # directly to the driver to start the task. The details of configurations
       # are specific to each driver, so please see specific driver
       # documentation for more information.
       config {
-        command       = "local/alertmanager-${version}.linux-amd64/alertmanager"
-        args          = [
+        command = "local/alertmanager-${version}.linux-amd64/alertmanager"
+        args    = [
           "--config.file=secrets/alertmanager.yml"
         ]
       }
@@ -163,22 +184,16 @@ job "${job_name}" {
       # popular go-getter library, which permits downloading artifacts from a
       # variety of locations using a URL as the input source.
       #
-      # For more information and examples on the "artifact" stanza, please see
-      # the online documentation at:
-      #
       #     https://www.nomadproject.io/docs/job-specification/artifact
       #
       artifact {
-        source          = "${url}"
+        source = "${url}"
       }
 
       # The "template" stanza instructs Nomad to manage a template, such as
       # a configuration file or script. This template can optionally pull data
       # from Consul or Vault to populate runtime configuration data.
       #
-      # For more information and examples on the "template" stanza, please see
-      # the online documentation at:
-      #
       #     https://www.nomadproject.io/docs/job-specification/template
       #
       template {
@@ -337,15 +352,15 @@ EOH
       #     https://www.nomadproject.io/docs/job-specification/service
       #
       service {
-        name            = "${service_name}"
-        port            = "${service_name}"
-        tags            = [ "${service_name}$${NOMAD_ALLOC_INDEX}" ]
+        name       = "${service_name}"
+        port       = "${service_name}"
+        tags       = [ "${service_name}$${NOMAD_ALLOC_INDEX}" ]
         check {
-          name          = "Alertmanager Check Live"
-          type          = "http"
-          path          = "/-/healthy"
-          interval      = "10s"
-          timeout       = "2s"
+          name     = "Alertmanager Check Live"
+          type     = "http"
+          path     = "/-/healthy"
+          interval = "10s"
+          timeout  = "2s"
         }
       }
 
@@ -354,32 +369,12 @@ EOH
       # This ensures the task will execute on a machine that contains enough
       # resource capacity.
       #
-      # For more information and examples on the "resources" stanza, please see
-      # the online documentation at:
-      #
       #     https://www.nomadproject.io/docs/job-specification/resources
       #
       resources {
-        cpu             = ${cpu}
-        memory          = ${mem}
-        # The network stanza specifies the networking requirements for the task
-        # group, including the network mode and port allocations. When scheduling
-        # jobs in Nomad they are provisioned across your fleet of machines along
-        # with other jobs and services. Because you don't know in advance what host
-        # your job will be provisioned on, Nomad will provide your tasks with
-        # network configuration when they start up.
-        #
-        # For more information and examples on the "template" stanza, please see
-        # the online documentation at:
-        #
-        #     https://www.nomadproject.io/docs/job-specification/network
-        #
-        network {
-          port "${service_name}" {
-            static      = ${port}
-          }
-        }
+        cpu    = ${cpu}
+        memory = ${memory}
       }
     }
   }
-}
\ No newline at end of file
+}
diff --git a/fdio.infra.terraform/1n_nmd/alertmanager/fdio/main.tf b/fdio.infra.terraform/1n_nmd/alertmanager/fdio/main.tf
new file mode 100644
index 0000000000..745e450a8c
--- /dev/null
+++ b/fdio.infra.terraform/1n_nmd/alertmanager/fdio/main.tf
@@ -0,0 +1,14 @@
+module "alertmanager" {
+  providers = {
+    nomad = nomad.yul1
+  }
+  source = "../"
+
+  # alertmanager
+  datacenters           = ["yul1"]
+  slack_jenkins_api_key = "TE07RD1V1/B01U1NV9HV3/hKZXJJ74g2JcISq4K3QC1eG9"
+  slack_jenkins_channel = "fdio-jobs-monitoring"
+  slack_default_api_key = "TE07RD1V1/B01UUK23B6C/hZTcCu42FUv8d6rtirHtcYIi"
+  slack_default_channel = "fdio-infra-monitoring"
+  am_version            = "0.23.0"
+}
\ No newline at end of file
diff --git a/fdio.infra.terraform/1n_nmd/alertmanager/fdio/providers.tf b/fdio.infra.terraform/1n_nmd/alertmanager/fdio/providers.tf
new file mode 100644
index 0000000000..42a6a45ce0
--- /dev/null
+++ b/fdio.infra.terraform/1n_nmd/alertmanager/fdio/providers.tf
@@ -0,0 +1,13 @@
+provider "nomad" {
+  address = var.nomad_provider_address
+  alias   = "yul1"
+  #  ca_file   = var.nomad_provider_ca_file
+  #  cert_file = var.nomad_provider_cert_file
+  #  key_file  = var.nomad_provider_key_file
+}
+
+provider "vault" {
+  address         = var.vault_provider_address
+  skip_tls_verify = var.vault_provider_skip_tls_verify
+  token           = var.vault_provider_token
+}
\ No newline at end of file
diff --git a/fdio.infra.terraform/1n_nmd/alertmanager/fdio/variables.tf b/fdio.infra.terraform/1n_nmd/alertmanager/fdio/variables.tf
new file mode 100644
index 0000000000..7d5be09d21
--- /dev/null
+++ b/fdio.infra.terraform/1n_nmd/alertmanager/fdio/variables.tf
@@ -0,0 +1,47 @@
+variable "nomad_acl" {
+  description = "Nomad ACLs enabled/disabled."
+  type        = bool
+  default     = false
+}
+
+variable "nomad_provider_address" {
+  description = "FD.io Nomad cluster address."
+  type        = string
+  default     = "http://10.32.8.14:4646"
+}
+
+variable "nomad_provider_ca_file" {
+  description = "A local file path to a PEM-encoded certificate authority."
+  type        = string
+  default     = "/etc/nomad.d/ssl/nomad-ca.pem"
+}
+
+variable "nomad_provider_cert_file" {
+  description = "A local file path to a PEM-encoded certificate."
+  type        = string
+  default     = "/etc/nomad.d/ssl/nomad-cli.pem"
+}
+
+variable "nomad_provider_key_file" {
+  description = "A local file path to a PEM-encoded private key."
+  type        = string
+  default     = "/etc/nomad.d/ssl/nomad-cli-key.pem"
+}
+
+variable "vault_provider_address" {
+  description = "Vault cluster address."
+  type        = string
+  default     = "http://10.30.51.28:8200"
+}
+
+variable "vault_provider_skip_tls_verify" {
+  description = "Verification of the Vault server's TLS certificate."
+  type        = bool
+  default     = false
+}
+
+variable "vault_provider_token" {
+  description = "Vault root token."
+  type        = string
+  sensitive   = true
+}
\ No newline at end of file
diff --git a/fdio.infra.terraform/1n_nmd/alertmanager/fdio/versions.tf b/fdio.infra.terraform/1n_nmd/alertmanager/fdio/versions.tf
new file mode 100644
index 0000000000..385c5c3f18
--- /dev/null
+++ b/fdio.infra.terraform/1n_nmd/alertmanager/fdio/versions.tf
@@ -0,0 +1,17 @@
+terraform {
+  backend "consul" {
+    address = "10.32.8.14:8500"
+    scheme  = "http"
+    path    = "terraform/alertmanager"
+  }
+  required_providers {
+    nomad = {
+      source  = "hashicorp/nomad"
+      version = ">= 1.4.16"
+    }
+    vault = {
+      version = ">= 3.2.1"
+    }
+  }
+  required_version = ">= 1.1.4"
+}
\ No newline at end of file
diff --git a/fdio.infra.terraform/1n_nmd/alertmanager/main.tf b/fdio.infra.terraform/1n_nmd/alertmanager/main.tf
index b7ab5dce92..e8a1389150 100644
--- a/fdio.infra.terraform/1n_nmd/alertmanager/main.tf
+++ b/fdio.infra.terraform/1n_nmd/alertmanager/main.tf
@@ -1,40 +1,48 @@
 locals {
-  datacenters = join(",", var.nomad_datacenters)
-
-  alertmanager_url = join("",
+  datacenters = join(",", var.datacenters)
+  url         = join("",
     [
       "https://github.com",
       "/prometheus/alertmanager/releases/download/",
-      "v${var.alertmanager_version}/",
-      "alertmanager-${var.alertmanager_version}.linux-amd64.tar.gz"
+      "v${var.am_version}/",
+      "alertmanager-${var.am_version}.linux-amd64.tar.gz"
     ]
   )
 }
 
-data "template_file" "nomad_job_alertmanager" {
-  template = file("${path.module}/conf/nomad/alertmanager.hcl")
-  vars = {
-    datacenters            = local.datacenters
-    url                    = local.alertmanager_url
-    job_name               = var.alertmanager_job_name
-    use_canary             = var.alertmanager_use_canary
-    group_count            = var.alertmanager_group_count
-    service_name           = var.alertmanager_service_name
-    use_vault_provider     = var.alertmanager_vault_secret.use_vault_provider
-    version                = var.alertmanager_version
-    cpu                    = var.alertmanager_cpu
-    mem                    = var.alertmanager_mem
-    port                   = var.alertmanager_port
-    slack_jenkins_api_key  = var.alertmanager_slack_jenkins_api_key
-    slack_jenkins_channel  = var.alertmanager_slack_jenkins_channel
-    slack_jenkins_receiver = var.alertmanager_slack_jenkins_receiver
-    slack_default_api_key  = var.alertmanager_slack_default_api_key
-    slack_default_channel  = var.alertmanager_slack_default_channel
-    slack_default_receiver = var.alertmanager_slack_default_receiver
-  }
-}
-
 resource "nomad_job" "nomad_job_alertmanager" {
-  jobspec = data.template_file.nomad_job_alertmanager.rendered
-  detach  = false
-}
\ No newline at end of file
+  jobspec = templatefile(
+    "${path.module}/conf/nomad/alertmanager.hcl.tftpl",
+    {
+      auto_promote              = var.auto_promote,
+      auto_revert               = var.auto_revert,
+      canary                    = var.canary,
+      cpu                       = var.cpu,
+      datacenters               = local.datacenters,
+      group_count               = var.group_count,
+      job_name                  = var.job_name,
+      max_parallel              = var.max_parallel,
+      memory                    = var.memory
+      port                      = var.port,
+      region                    = var.region,
+      service_name              = var.service_name,
+      slack_jenkins_api_key     = var.slack_jenkins_api_key,
+      slack_jenkins_channel     = var.slack_jenkins_channel,
+      slack_jenkins_receiver    = var.slack_jenkins_receiver,
+      slack_default_api_key     = var.slack_default_api_key,
+      slack_default_channel     = var.slack_default_channel,
+      slack_default_receiver    = var.slack_default_receiver,
+      url                       = local.url,
+      use_canary                = var.use_canary,
+      use_host_volume           = var.use_host_volume,
+      use_vault_provider        = var.vault_secret.use_vault_provider,
+      vault_kv_policy_name      = var.vault_secret.vault_kv_policy_name,
+      vault_kv_path             = var.vault_secret.vault_kv_path,
+      vault_kv_field_access_key = var.vault_secret.vault_kv_field_access_key,
+      vault_kv_field_secret_key = var.vault_secret.vault_kv_field_secret_key,
+      version                   = var.am_version,
+      volume_destination        = var.volume_destination,
+      volume_source             = var.volume_source
+  })
+  detach = false
+}
diff --git a/fdio.infra.terraform/1n_nmd/alertmanager/variables.tf b/fdio.infra.terraform/1n_nmd/alertmanager/variables.tf
index e24ceb64c6..e452598fa6 100644
--- a/fdio.infra.terraform/1n_nmd/alertmanager/variables.tf
+++ b/fdio.infra.terraform/1n_nmd/alertmanager/variables.tf
@@ -1,43 +1,102 @@
 # Nomad
-variable "nomad_datacenters" {
-  description = "Nomad data centers"
+variable "datacenters" {
+  description = "Specifies the list of DCs to be considered placing this task"
   type        = list(string)
   default     = ["dc1"]
 }
 
-# Alermanager
-variable "alertmanager_job_name" {
-  description = "Job name"
+variable "region" {
+  description = "Specifies the list of DCs to be considered placing this task"
   type        = string
-  default     = "alertmanager"
+  default     = "global"
+}
+
+variable "volume_source" {
+  description = "The name of the volume to request"
+  type        = string
+  default     = "persistence"
+}
+
+# Alertmanager
+variable "am_version" {
+  description = "Alertmanager version"
+  type        = string
+  default     = "0.21.0"
+}
+
+variable "auto_promote" {
+  description = "Specifies if the job should auto-promote to the canary version"
+  type        = bool
+  default     = true
+}
+
+variable "auto_revert" {
+  description = "Specifies if the job should auto-revert to the last stable job"
+  type        = bool
+  default     = true
 }
 
-variable "alertmanager_group_count" {
-  description = "Number of group instances"
+variable "canary" {
+  description = "Equal to the count of the task group allows blue/green depl."
   type        = number
   default     = 1
 }
 
-variable "alertmanager_service_name" {
-  description = "Service name"
+variable "cpu" {
+  description = "CPU allocation"
+  type        = number
+  default     = 1000
+}
+
+variable "group_count" {
+  description = "Specifies the number of the task groups running under this one"
+  type        = number
+  default     = 1
+}
+
+variable "job_name" {
+  description = "Specifies a name for the job"
   type        = string
   default     = "alertmanager"
 }
 
-variable "alertmanager_version" {
-  description = "Version"
+variable "max_parallel" {
+  description = "Specifies the maximum number of updates to perform in parallel"
+  type        = number
+  default     = 1
+}
+
+variable "memory" {
+  description = "Specifies the memory required in MB"
+  type        = number
+  default     = 1024
+}
+
+variable "port" {
+  description = "Specifies the static TCP/UDP port to allocate"
+  type        = number
+  default     = 9093
+}
+
+variable "service_name" {
+  description = "Specifies the name this service will be advertised in Consul"
   type        = string
-  default     = "0.21.0"
+  default     = "alertmanager"
 }
 
-variable "alertmanager_use_canary" {
+variable "use_canary" {
   description = "Uses canary deployment"
   type        = bool
+  default     = true
+}
+
+variable "use_host_volume" {
+  description = "Use Nomad host volume feature"
+  type        = bool
   default     = false
 }
 
-variable "alertmanager_vault_secret" {
-  description = "Set of properties to be able to fetch secret from vault"
+variable "vault_secret" {
   type = object({
     use_vault_provider        = bool,
     vault_kv_policy_name      = string,
@@ -45,57 +104,53 @@ variable "alertmanager_vault_secret" {
     vault_kv_field_access_key = string,
     vault_kv_field_secret_key = string
   })
+  description = "Set of properties to be able to fetch secret from vault."
+  default = {
+    use_vault_provider        = false
+    vault_kv_policy_name      = "kv"
+    vault_kv_path             = "secret/data/alertmanager"
+    vault_kv_field_access_key = "access_key"
+    vault_kv_field_secret_key = "secret_key"
+  }
 }
 
-variable "alertmanager_cpu" {
-  description = "CPU allocation"
-  type        = number
-  default     = 1000
-}
-
-variable "alertmanager_mem" {
-  description = "RAM allocation"
-  type        = number
-  default     = 1024
-}
-
-variable "alertmanager_port" {
-  description = "TCP allocation"
-  type        = number
-  default     = 9093
+variable "volume_destination" {
+  description = "Specifies where the volume should be mounted inside the task"
+  type        = string
+  default     = "/data/"
 }
 
-variable "alertmanager_slack_jenkins_api_key" {
+variable "slack_jenkins_api_key" {
   description = "Alertmanager jenkins slack API key"
   type        = string
   default     = "XXXXXXXXX/XXXXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXX"
 }
 
-variable "alertmanager_slack_jenkins_receiver" {
+variable "slack_jenkins_receiver" {
   description = "Alertmanager jenkins slack receiver"
   type        = string
   default     = "jenkins-slack-receiver"
 }
 
-variable "alertmanager_slack_jenkins_channel" {
+variable "slack_jenkins_channel" {
   description = "Alertmanager jenkins slack channel"
   type        = string
   default     = "jenkins-channel"
 }
 
-variable "alertmanager_slack_default_api_key" {
+variable "slack_default_api_key" {
   description = "Alertmanager default slack API key"
   type        = string
   default     = "XXXXXXXXX/XXXXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXX"
 }
 
-variable "alertmanager_slack_default_receiver" {
+variable "slack_default_receiver" {
   description = "Alertmanager default slack receiver"
   type        = string
   default     = "default-slack-receiver"
 }
 
-variable "alertmanager_slack_default_channel" {
+variable "slack_default_channel" {
   description = "Alertmanager default slack channel"
   type        = string
   default     = "default-channel"
diff --git a/fdio.infra.terraform/1n_nmd/alertmanager/versions.tf b/fdio.infra.terraform/1n_nmd/alertmanager/versions.tf
index b80610a525..5f283ed4ea 100644
--- a/fdio.infra.terraform/1n_nmd/alertmanager/versions.tf
+++ b/fdio.infra.terraform/1n_nmd/alertmanager/versions.tf
@@ -2,12 +2,8 @@ terraform {
   required_providers {
     nomad = {
       source  = "hashicorp/nomad"
-      version = "~> 1.4.15"
-    }
-    template = {
-      source  = "hashicorp/template"
-      version = "~> 2.2.0"
+      version = ">= 1.4.16"
     }
   }
-  required_version = ">= 1.0.3"
-}
+  required_version = ">= 1.1.4"
+}
\ No newline at end of file