Use upstream net-http-persistent, connection_pool (un-vendored)

.github/workflows/run-tests.yml

@@ -10,13 +10,13 @@ jobs:
       fail-fast: false
       matrix:
         # https://endoflife.date/ruby
-        ruby: ["2.7", "3.0", "3.1", "3.2"]
-        vault: ["1.11.9", "1.12.5", "1.13.1"]
+        ruby: ["3.1", "3.2", "3.3", "3.4"]
+        vault: ["1.14.10", "1.15.6", "1.16.3", "1.17.6", "1.18.4"]
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      - uses: ruby/setup-ruby@22fdc77bf4148f810455b226c90fb81b5cbc00a7 # v1.171.0
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: ruby/setup-ruby@32110d4e311bd8996b2a82bf2a43b714ccc91777 # v1.221.0
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically

lib/vault/client.rb

@@ -5,7 +5,8 @@
 require "json"
 require "uri"
 
-require_relative "persistent"
+require "net/http/persistent"
+
 require_relative "configurable"
 require_relative "errors"
 require_relative "version"
@@ -50,6 +51,14 @@ class Client
       a << Errno::ECONNREFUSED
       a << Errno::EADDRNOTAVAIL
 
+      # Broken connection errors
+      a << Errno::ECONNRESET
+      a << Errno::ECONNABORTED
+      a << Errno::EPIPE
+      a << Errno::ETIMEDOUT
+      a << OpenSSL::SSL::SSLError
+      a << IOError
+
       # Failed to read body or no response body given
       a << EOFError
 
@@ -61,7 +70,7 @@ class Client
       a << Net::ReadTimeout if defined?(Net::ReadTimeout)
       a << Net::OpenTimeout if defined?(Net::OpenTimeout)
 
-      a << PersistentHTTP::Error
+      a << Net::HTTP::Persistent::Error
     end.freeze
 
     # Vault requires at least TLS1.2
@@ -92,7 +101,8 @@ def pool
       @lock.synchronize do
         return @nhp if @nhp
 
-        @nhp = PersistentHTTP.new("vault-ruby", nil, pool_size, pool_timeout)
+        @nhp = Net::HTTP::Persistent.new(name: "vault-ruby", pool_size:)
+        @nhp.pool.instance_variable_set(:@timeout, pool_timeout)
 
         if proxy_address
           proxy_uri = URI.parse "http://#{proxy_address}"