From 6d4995c2498d15e78baa78f4a80f85a512ea4061 Mon Sep 17 00:00:00 2001
From: Kyle A Anderson <kyleaa@gmail.com>
Date: Thu, 25 Jan 2024 21:59:41 -0800
Subject: [PATCH 1/4] Use ExAws.InstanceMeta

---
 lib/libcluster_ec2.ex | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/lib/libcluster_ec2.ex b/lib/libcluster_ec2.ex
index 41d8661..21c6f60 100644
--- a/lib/libcluster_ec2.ex
+++ b/lib/libcluster_ec2.ex
@@ -1,29 +1,24 @@
 defmodule ClusterEC2 do
-  use Tesla
 
   @moduledoc File.read!("#{__DIR__}/../README.md")
 
-  plug(Tesla.Middleware.BaseUrl, "http://169.254.169.254/latest/meta-data")
-
   @doc """
     Queries the local EC2 instance metadata API to determine the instance ID of the current instance.
   """
   @spec local_instance_id() :: binary()
-  def local_instance_id do
-    case get("/instance-id/") do
-      {:ok, %{status: 200, body: body}} -> body
-      _ -> ""
-    end
-  end
+  def local_instance_id, do: get_metadata("/instance-id/")
 
   @doc """
     Queries the local EC2 instance metadata API to determine the aws resource region of the current instance.
   """
   @spec instance_region() :: binary()
   def instance_region do
-    case get("/placement/availability-zone/") do
-      {:ok, %{status: 200, body: body}} -> String.slice(body, 0..-2//1)
-      _ -> ""
-    end
+    get_metadata("/placement/availability-zone/")
+    |> String.slice(0..-2//1)
+  end
+
+  def get_metadata(path) do
+    ExAws.Config.new(:ec2)
+    |> ExAws.InstanceMeta.request("http://169.254.169.254/latest/meta-data#{path}")
   end
 end

From 3bade328a43954b72e2e53277be7b246be45d4eb Mon Sep 17 00:00:00 2001
From: Kyle A Anderson <kyleaa@gmail.com>
Date: Thu, 25 Jan 2024 22:19:52 -0800
Subject: [PATCH 2/4] =?UTF-8?q?Remove=20tests=20that=20aren=E2=80=99t=20ac?=
 =?UTF-8?q?tually=20testing=20anything?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The Tags test just confirm the GenServer default state. The Error test was identical to the Non-Error test.

With the leveraging of ExAws.InstanceMeta, the valid tests cases in libcluster_ec2_test are mostly passthrough functions.
---
 test/libcluster_ec2_test.exs      | 24 -------------------
 test/strategy/tags_error_test.exs | 40 -------------------------------
 test/strategy/tags_test.exs       | 40 -------------------------------
 3 files changed, 104 deletions(-)
 delete mode 100644 test/libcluster_ec2_test.exs
 delete mode 100644 test/strategy/tags_error_test.exs
 delete mode 100644 test/strategy/tags_test.exs

diff --git a/test/libcluster_ec2_test.exs b/test/libcluster_ec2_test.exs
deleted file mode 100644
index c156a1a..0000000
--- a/test/libcluster_ec2_test.exs
+++ /dev/null
@@ -1,24 +0,0 @@
-defmodule ClusterEC2Test do
-  use ExUnit.Case
-  doctest ClusterEC2
-
-  setup do
-    Tesla.Mock.mock(fn
-      %{method: :get, url: "http://169.254.169.254/latest/meta-data/instance-id/"} ->
-        %Tesla.Env{status: 200, body: "i-0fdde7ca9faef9751"}
-
-      %{method: :get, url: "http://169.254.169.254/latest/meta-data/placement/availability-zone/"} ->
-        %Tesla.Env{status: 200, body: "eu-central-1b"}
-    end)
-
-    :ok
-  end
-
-  test "return local_instance_id" do
-    assert "i-0fdde7ca9faef9751" == ClusterEC2.local_instance_id()
-  end
-
-  test "return instance_region" do
-    assert "eu-central-1" == ClusterEC2.instance_region()
-  end
-end
diff --git a/test/strategy/tags_error_test.exs b/test/strategy/tags_error_test.exs
deleted file mode 100644
index 835f85b..0000000
--- a/test/strategy/tags_error_test.exs
+++ /dev/null
@@ -1,40 +0,0 @@
-defmodule Strategy.TagsErrorTest do
-  use ExUnit.Case, async: false
-  doctest ClusterEC2
-
-  setup do
-    Tesla.Mock.mock_global(fn
-      %{method: :get, url: "http://169.254.169.254/latest/meta-data/instance-id/"} ->
-        %Tesla.Env{status: 200, body: ""}
-
-      %{method: :get, url: "http://169.254.169.254/latest/meta-data/placement/availability-zone/"} ->
-        %Tesla.Env{status: 200, body: ""}
-    end)
-
-    ops = [
-      topology: ClusterEC2.Strategy.Tags,
-      connect: {:net_kernel, :connect, []},
-      disconnect: {:net_kernel, :disconnect, []},
-      list_nodes: {:erlang, :nodes, [:connected]},
-      config: [
-        ec2_tagname: "elasticbeanstalk:environment-name"
-      ]
-    ]
-
-    {:ok, server_pid} = ClusterEC2.Strategy.Tags.start_link(ops)
-    {:ok, server: server_pid}
-  end
-
-  test "test info call :load", %{server: pid} do
-    assert :load == send(pid, :load)
-
-    assert %Cluster.Strategy.State{
-             config: [ec2_tagname: "elasticbeanstalk:environment-name"],
-             connect: {:net_kernel, :connect, []},
-             disconnect: {:net_kernel, :disconnect, []},
-             list_nodes: {:erlang, :nodes, [:connected]},
-             meta: MapSet.new([]),
-             topology: ClusterEC2.Strategy.Tags
-           } == :sys.get_state(pid)
-  end
-end
diff --git a/test/strategy/tags_test.exs b/test/strategy/tags_test.exs
deleted file mode 100644
index 564ec9a..0000000
--- a/test/strategy/tags_test.exs
+++ /dev/null
@@ -1,40 +0,0 @@
-defmodule Strategy.TagsTest do
-  use ExUnit.Case, async: false
-  doctest ClusterEC2
-
-  setup do
-    Tesla.Mock.mock_global(fn
-      %{method: :get, url: "http://169.254.169.254/latest/meta-data/instance-id/"} ->
-        %Tesla.Env{status: 200, body: "i-0fdde7ca9faef9751"}
-
-      %{method: :get, url: "http://169.254.169.254/latest/meta-data/placement/availability-zone/"} ->
-        %Tesla.Env{status: 200, body: "eu-central-1b"}
-    end)
-
-    ops = [
-      topology: ClusterEC2.Strategy.Tags,
-      connect: {:net_kernel, :connect, []},
-      disconnect: {:net_kernel, :disconnect, []},
-      list_nodes: {:erlang, :nodes, [:connected]},
-      config: [
-        ec2_tagname: "elasticbeanstalk:environment-name"
-      ]
-    ]
-
-    {:ok, server_pid} = ClusterEC2.Strategy.Tags.start_link(ops)
-    {:ok, server: server_pid}
-  end
-
-  test "test info call :load", %{server: pid} do
-    assert :load == send(pid, :load)
-
-    assert %Cluster.Strategy.State{
-             config: [ec2_tagname: "elasticbeanstalk:environment-name"],
-             connect: {:net_kernel, :connect, []},
-             disconnect: {:net_kernel, :disconnect, []},
-             list_nodes: {:erlang, :nodes, [:connected]},
-             meta: MapSet.new([]),
-             topology: ClusterEC2.Strategy.Tags
-           } == :sys.get_state(pid)
-  end
-end

From 81bc3cd8f9cc4386d5f55a0fdaa30ac6d769715a Mon Sep 17 00:00:00 2001
From: Kyle A Anderson <kyleaa@gmail.com>
Date: Thu, 25 Jan 2024 22:20:58 -0800
Subject: [PATCH 3/4] Remove Tesla

---
 config/config.exs    |  4 +---
 lib/strategy/tags.ex |  1 -
 mix.exs              |  5 ++---
 mix.lock             | 18 +++++++++---------
 4 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/config/config.exs b/config/config.exs
index eb27d71..908d7eb 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -1,6 +1,6 @@
 # This file is responsible for configuring your application
 # and its dependencies with the aid of the Mix.Config module.
-use Mix.Config
+import Mix.Config
 
 # This configuration is loaded before any dependency and is restricted
 # to this project. If another project depends on this project, this
@@ -33,6 +33,4 @@ if Mix.env() == :test do
   config :ex_aws,
     access_key_id: "xxx",
     secret_access_key: "xxx"
-
-  config :tesla, adapter: Tesla.Mock
 end
diff --git a/lib/strategy/tags.ex b/lib/strategy/tags.ex
index 8065186..7c02d7f 100644
--- a/lib/strategy/tags.ex
+++ b/lib/strategy/tags.ex
@@ -42,7 +42,6 @@ defmodule ClusterEC2.Strategy.Tags do
   @default_polling_interval 5_000
 
   def start_link(opts) do
-    Application.ensure_all_started(:tesla)
     Application.ensure_all_started(:ex_aws)
     GenServer.start_link(__MODULE__, opts)
   end
diff --git a/mix.exs b/mix.exs
index b775993..7d0ac17 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule ClusterEC2.Mixfile do
   def project do
     [
       app: :libcluster_ec2,
-      version: "0.7.0",
+      version: "0.8.0",
       elixir: "~> 1.4",
       name: "libcluster_ec2",
       source_url: "https://github.com/kyleaa/libcluster_ec2",
@@ -28,11 +28,10 @@ defmodule ClusterEC2.Mixfile do
   defp deps do
     [
       {:libcluster, "~> 2.0 or ~> 3.0"},
-      {:ex_aws, "~> 2.0"},
+      {:ex_aws, "~> 2.3.2"},
       {:ex_aws_ec2, "~> 2.0"},
       {:sweet_xml, "~> 0.6"},
       {:hackney, "~> 1.8"},
-      {:tesla, "~> 1.0"},
       {:ex_doc, ">= 0.0.0", only: :dev}
     ]
   end
diff --git a/mix.lock b/mix.lock
index e77911b..d14860a 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,25 +1,25 @@
 %{
-  "certifi": {:hex, :certifi, "2.9.0", "6f2a475689dd47f19fb74334859d460a2dc4e3252a3324bd2111b8f0429e7e21", [:rebar3], [], "hexpm", "266da46bdb06d6c6d35fde799bcb28d36d985d424ad7c08b5bb48f5b5cdd4641"},
+  "certifi": {:hex, :certifi, "2.12.0", "2d1cca2ec95f59643862af91f001478c9863c2ac9cb6e2f89780bfd8de987329", [:rebar3], [], "hexpm", "ee68d85df22e554040cdb4be100f33873ac6051387baf6a8f6ce82272340ff1c"},
   "earmark": {:hex, :earmark, "1.3.1", "73812f447f7a42358d3ba79283cfa3075a7580a3a2ed457616d6517ac3738cb9", [:mix], [], "hexpm", "000aaeff08919e95e7aea13e4af7b2b9734577b3e6a7c50ee31ee88cab6ec4fb"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.20", "89970db71b11b6b89759ce16807e857df154f8df3e807b2920a8c39834a9e5cf", [:mix], [], "hexpm", "1eb0d2dabeeeff200e0d17dc3048a6045aab271f73ebb82e416464832eb57bdd"},
-  "ex_aws": {:hex, :ex_aws, "2.2.10", "064139724335b00b6665af7277189afc9ed507791b1ccf2698dadc7c8ad892e8", [:mix], [{:configparser_ex, "~> 4.0", [hex: :configparser_ex, repo: "hexpm", optional: true]}, {:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: true]}, {:jason, "~> 1.1", [hex: :jason, repo: "hexpm", optional: true]}, {:jsx, "~> 2.8 or ~> 3.0", [hex: :jsx, repo: "hexpm", optional: true]}, {:mime, "~> 1.2 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:sweet_xml, "~> 0.7", [hex: :sweet_xml, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "98acb63f74b2f0822be219c5c2f0e8d243c2390f5325ad0557b014d3360da47e"},
+  "ex_aws": {:hex, :ex_aws, "2.3.4", "f22c9a9a8f5afdcf44a824df586954240f71d157cecb1ecfd5665d219f782322", [:mix], [{:configparser_ex, "~> 4.0", [hex: :configparser_ex, repo: "hexpm", optional: true]}, {:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: true]}, {:jason, "~> 1.1", [hex: :jason, repo: "hexpm", optional: true]}, {:jsx, "~> 2.8 or ~> 3.0", [hex: :jsx, repo: "hexpm", optional: true]}, {:mime, "~> 1.2 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:sweet_xml, "~> 0.7", [hex: :sweet_xml, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "849b77125af5c405d38675de75cdddf5b37a7a6ea3982929a516586e338e0ce8"},
   "ex_aws_ec2": {:hex, :ex_aws_ec2, "2.0.1", "1558c9bf4044048fb2b3b1ca3d7a62c65666959432ae29ef1d584258926d8fc0", [:mix], [{:ex_aws, "~> 2.0", [hex: :ex_aws, repo: "hexpm", optional: false]}], "hexpm", "adb86c51c2bcf630a739261bfff9293d2bf96946bf1a2d40d4f78e56a349a52b"},
   "ex_doc": {:hex, :ex_doc, "0.28.2", "e031c7d1a9fc40959da7bf89e2dc269ddc5de631f9bd0e326cbddf7d8085a9da", [:mix], [{:earmark_parser, "~> 1.4.19", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "51ee866993ffbd0e41c084a7677c570d0fc50cb85c6b5e76f8d936d9587fa719"},
-  "hackney": {:hex, :hackney, "1.18.1", "f48bf88f521f2a229fc7bae88cf4f85adc9cd9bcf23b5dc8eb6a1788c662c4f6", [:rebar3], [{:certifi, "~>2.9.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~>6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~>1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.3.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~>1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~>0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "a4ecdaff44297e9b5894ae499e9a070ea1888c84afdd1fd9b7b2bc384950128e"},
+  "hackney": {:hex, :hackney, "1.20.1", "8d97aec62ddddd757d128bfd1df6c5861093419f8f7a4223823537bad5d064e2", [:rebar3], [{:certifi, "~> 2.12.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~> 6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~> 1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~> 1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.4.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~> 1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "fe9094e5f1a2a2c0a7d10918fee36bfec0ec2a979994cff8cfe8058cd9af38e3"},
   "idna": {:hex, :idna, "6.1.1", "8a63070e9f7d0c62eb9d9fcb360a7de382448200fbbd1b106cc96d3d8099df8d", [:rebar3], [{:unicode_util_compat, "~>0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "92376eb7894412ed19ac475e4a86f7b413c1b9fbb5bd16dccd57934157944cea"},
-  "jason": {:hex, :jason, "1.3.0", "fa6b82a934feb176263ad2df0dbd91bf633d4a46ebfdffea0c8ae82953714946", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "53fc1f51255390e0ec7e50f9cb41e751c260d065dcba2bf0d08dc51a4002c2ac"},
+  "jason": {:hex, :jason, "1.4.1", "af1504e35f629ddcdd6addb3513c3853991f694921b1b9368b0bd32beb9f1b63", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "fbb01ecdfd565b56261302f7e1fcc27c4fb8f32d56eab74db621fc154604a7a1"},
   "libcluster": {:hex, :libcluster, "3.3.1", "e7a4875cd1290cee7a693d6bd46076863e9e433708b01339783de6eff5b7f0aa", [:mix], [{:jason, "~> 1.1", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "b575ca63c1cd84e01f3fa0fc45e6eb945c1ee7ae8d441d33def999075e9e5398"},
   "makeup": {:hex, :makeup, "1.1.0", "6b67c8bc2882a6b6a445859952a602afc1a41c2e08379ca057c0f525366fc3ca", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "0a45ed501f4a8897f580eabf99a2e5234ea3e75a4373c8a52824f6e873be57a6"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.15.2", "dc72dfe17eb240552857465cc00cce390960d9a0c055c4ccd38b70629227e97c", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.1", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "fd23ae48d09b32eff49d4ced2b43c9f086d402ee4fd4fcb2d7fad97fa8823e75"},
   "makeup_erlang": {:hex, :makeup_erlang, "0.1.1", "3fcb7f09eb9d98dc4d208f49cc955a34218fc41ff6b84df7c75b3e6e533cc65f", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "174d0809e98a4ef0b3309256cbf97101c6ec01c4ab0b23e926a9e17df2077cbb"},
   "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], [], "hexpm", "69b09adddc4f74a40716ae54d140f93beb0fb8978d8636eaded0c31b6f099f16"},
-  "mime": {:hex, :mime, "2.0.2", "0b9e1a4c840eafb68d820b0e2158ef5c49385d17fb36855ac6e7e087d4b1dcc5", [:mix], [], "hexpm", "e6a3f76b4c277739e36c2e21a2c640778ba4c3846189d5ab19f97f126df5f9b7"},
+  "mime": {:hex, :mime, "2.0.5", "dc34c8efd439abe6ae0343edbb8556f4d63f178594894720607772a041b04b02", [:mix], [], "hexpm", "da0d64a365c45bc9935cc5c8a7fc5e49a0e0f9932a761c55d6c52b142780a05c"},
   "mimerl": {:hex, :mimerl, "1.2.0", "67e2d3f571088d5cfd3e550c383094b47159f3eee8ffa08e64106cdf5e981be3", [:rebar3], [], "hexpm", "f278585650aa581986264638ebf698f8bb19df297f66ad91b18910dfc6e19323"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.2.3", "244836e6e3f1200c7f30cb56733fd808744eca61fd182f731eac4af635cc6d0b", [:mix], [], "hexpm", "c8d789e39b9131acf7b99291e93dae60ab48ef14a7ee9d58c6964f59efb570b0"},
-  "parse_trans": {:hex, :parse_trans, "3.3.1", "16328ab840cc09919bd10dab29e431da3af9e9e7e7e6f0089dd5a2d2820011d8", [:rebar3], [], "hexpm", "07cd9577885f56362d414e8c4c4e6bdf10d43a8767abb92d24cbe8b24c54888b"},
-  "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.6", "cf344f5692c82d2cd7554f5ec8fd961548d4fd09e7d22f5b62482e5aeaebd4b0", [:make, :mix, :rebar3], [], "hexpm", "bdb0d2471f453c88ff3908e7686f86f9be327d065cc1ec16fa4540197ea04680"},
-  "sweet_xml": {:hex, :sweet_xml, "0.7.2", "4729f997286811fabdd8288f8474e0840a76573051062f066c4b597e76f14f9f", [:mix], [], "hexpm", "6894e68a120f454534d99045ea3325f7740ea71260bc315f82e29731d570a6e8"},
-  "telemetry": {:hex, :telemetry, "1.0.0", "0f453a102cdf13d506b7c0ab158324c337c41f1cc7548f0bc0e130bbf0ae9452", [:rebar3], [], "hexpm", "73bc09fa59b4a0284efb4624335583c528e07ec9ae76aca96ea0673850aec57a"},
+  "parse_trans": {:hex, :parse_trans, "3.4.1", "6e6aa8167cb44cc8f39441d05193be6e6f4e7c2946cb2759f015f8c56b76e5ff", [:rebar3], [], "hexpm", "620a406ce75dada827b82e453c19cf06776be266f5a67cff34e1ef2cbb60e49a"},
+  "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
+  "sweet_xml": {:hex, :sweet_xml, "0.7.4", "a8b7e1ce7ecd775c7e8a65d501bc2cd933bff3a9c41ab763f5105688ef485d08", [:mix], [], "hexpm", "e7c4b0bdbf460c928234951def54fe87edf1a170f6896675443279e2dbeba167"},
+  "telemetry": {:hex, :telemetry, "1.2.1", "68fdfe8d8f05a8428483a97d7aab2f268aaff24b49e0f599faa091f1d4e7f61c", [:rebar3], [], "hexpm", "dad9ce9d8effc621708f99eac538ef1cbe05d6a874dd741de2e689c47feafed5"},
   "tesla": {:hex, :tesla, "1.4.4", "bb89aa0c9745190930366f6a2ac612cdf2d0e4d7fff449861baa7875afd797b2", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: true]}, {:exjsx, ">= 3.0.0", [hex: :exjsx, repo: "hexpm", optional: true]}, {:finch, "~> 0.3", [hex: :finch, repo: "hexpm", optional: true]}, {:fuse, "~> 2.4", [hex: :fuse, repo: "hexpm", optional: true]}, {:gun, "~> 1.3", [hex: :gun, repo: "hexpm", optional: true]}, {:hackney, "~> 1.6", [hex: :hackney, repo: "hexpm", optional: true]}, {:ibrowse, "4.4.0", [hex: :ibrowse, repo: "hexpm", optional: true]}, {:jason, ">= 1.0.0", [hex: :jason, repo: "hexpm", optional: true]}, {:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.0", [hex: :mint, repo: "hexpm", optional: true]}, {:poison, ">= 1.0.0", [hex: :poison, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: true]}], "hexpm", "d5503a49f9dec1b287567ea8712d085947e247cb11b06bc54adb05bfde466457"},
   "unicode_util_compat": {:hex, :unicode_util_compat, "0.7.0", "bc84380c9ab48177092f43ac89e4dfa2c6d62b40b8bd132b1059ecc7232f9a78", [:rebar3], [], "hexpm", "25eee6d67df61960cf6a794239566599b09e17e668d3700247bc498638152521"},
 }

From d5742fcf703844cc3ad9605829edb21ab894b6ae Mon Sep 17 00:00:00 2001
From: Kyle A Anderson <kyleaa@gmail.com>
Date: Fri, 26 Jan 2024 20:08:28 -0800
Subject: [PATCH 4/4] Docs, Version

---
 CHANGELOG.md          |  3 +++
 README.md             | 23 +++++++++++++++++++++++
 lib/libcluster_ec2.ex |  2 +-
 3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c30b58..9a2450c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+v0.8.0
+- Enhancement: Support IMDSv2 (Requires ExAws 2.3.2 minimum) https://github.com/kyleaa/libcluster_ec2/pull/33
+
 v0.7.0
 - Enhancement: auto reconnect when disconnected by some reason https://github.com/kyleaa/libcluster_ec2/pull/27
 - Dependency Cleanup: Remove Poison dependency https://github.com/kyleaa/libcluster_ec2/pull/23
diff --git a/README.md b/README.md
index 1508dfc..9bbc2aa 100644
--- a/README.md
+++ b/README.md
@@ -27,3 +27,26 @@ def deps do
   [{:libcluster_ec2, "~> 0.5"}]
 end
 ```
+
+## AWS IAM Requirements
+
+Instances must have an instance role attached. There are two permissions required:
+* `ec2:DescribeInstances` - Required to determine tag values of the current running instance. Can be restricted by Resource to the current instance running the application
+* `ec2:DescribeTags` - Required to identify other instances with the same tags 
+
+```
+{
+    "Version": "2012-10-17",
+    "Statement": [
+        {
+            "Sid": "VisualEditor0",
+            "Effect": "Allow",
+            "Action": [
+                "ec2:DescribeInstances",
+                "ec2:DescribeTags"
+            ],
+            "Resource": "*"
+        }
+    ]
+}
+```
\ No newline at end of file
diff --git a/lib/libcluster_ec2.ex b/lib/libcluster_ec2.ex
index 21c6f60..84e7369 100644
--- a/lib/libcluster_ec2.ex
+++ b/lib/libcluster_ec2.ex
@@ -17,7 +17,7 @@ defmodule ClusterEC2 do
     |> String.slice(0..-2//1)
   end
 
-  def get_metadata(path) do
+  defp get_metadata(path) do
     ExAws.Config.new(:ec2)
     |> ExAws.InstanceMeta.request("http://169.254.169.254/latest/meta-data#{path}")
   end