create a new method for inferring the PPID

Dockerfile

@@ -9,8 +9,6 @@ RUN <<EOT
   apk upgrade --no-cache
 EOT
 
-RUN mkdir -p /run/app
-
 
 FROM base AS build
 
@@ -40,10 +38,6 @@ FROM base
 # RUN useradd ruby --home /app --shell /bin/sh
 RUN adduser ruby -h /app -D
 
-RUN mkdir -p /run/app
-
-RUN chown ruby:ruby /run/app
-
 USER ruby:ruby
 
 COPY --from=build /usr/local/bundle /usr/local/bundle

app.rb

@@ -28,7 +28,6 @@ DEFAULT_FLAKEY = 50
 ENV_PREFIX = "KUBERNAUT"
 
 CLK_TCK = 100
-PID_FILE_PATH = "/run/app/pid".freeze
 PROC_UPTIME_PATH = "/proc/uptime".freeze
 
 SECONDS_PER_YEAR = 31_556_952
@@ -109,7 +108,7 @@ end
 
 class TickTock
   def initialize
-    @pid = master_pid
+    @pid = ppid
     @procfs_f = format "/proc/%s/stat", @pid
     puts @pid
   end
@@ -178,9 +177,22 @@ class Sleep
   end
 end
 
-def master_pid
+def ppid
-  pid_s = File.read PID_FILE_PATH
+  pid = Process.pid
-  Integer pid_s.strip
+  # self
+  ps = File.open "/proc/#{pid}/stat", &:readline
+  ps = ps.split(" ")
+  ppid = Integer(ps[3])
+
+  # ppid
+  ps = File.open "/proc/#{ppid}/stat", &:readline
+  ps = ps.split(" ")
+
+  if ps[1].include? "ruby"
+    ppid
+  else
+    pid
+  end
 end
 
 def system_uptime
@@ -350,19 +362,19 @@ get "/snowflake" do
 end
 
 post "/quit" do
-  Process.kill("TERM", master_pid)
+  Process.kill("TERM", ppid)
   nil
 end
 
 post "/halt" do
-  Process.kill("QUIT", master_pid)
+  Process.kill("QUIT", ppid)
   nil
 end
 
 get "/pid" do
   pretty = params.key? :pretty
 
-  jsonify({puma: master_pid, pid: Process.pid}, pretty:)
+  jsonify({ppid: ppid, pid: Process.pid}, pretty:)
 end
 
 get "/token" do

config/puma.rb

@@ -1,3 +0,0 @@
-# workers 3
-pidfile "/run/app/pid"
-preload_app!