Make bats tests refuse to start on non-VMs (#24315)

The bats tests are descructive and must be run as root. This is a
horrible combination on any sane system but perfectly fine to do
in a VM. This change modifies the tests so they revuse to start
unless they are in an environment with an `/etc/is_vagrant_vm`
file. The Vagrantfile creates it on startup.

Closes #24137

Vagrantfile

@@ -104,6 +104,12 @@ SOURCE_PROMPT
 source /etc/profile.d/elasticsearch_prompt.sh
 SOURCE_PROMPT
       SHELL
+      # Creates a file to mark the machine as created by vagrant. Tests check
+      # for this file and refuse to run if it is not present so that they can't
+      # be run unexpectedly.
+      config.vm.provision "markerfile", type: "shell", inline: <<-SHELL
+        touch /etc/is_vagrant_vm
+      SHELL
     end
     config.config_procs.push ['2', set_prompt]
   end

qa/vagrant/src/test/resources/packaging/tests/20_tar_package.bats

@@ -3,9 +3,14 @@
 # This file is used to test the tar gz package.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/tests/30_deb_package.bats

@@ -4,9 +4,14 @@
 # of a Debian package.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/tests/40_rpm_package.bats

@@ -3,9 +3,14 @@
 # This file is used to test the installation of a RPM package.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/tests/60_systemd.bats

@@ -3,9 +3,14 @@
 # This file is used to test the elasticsearch Systemd setup.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/tests/70_sysv_initd.bats

@@ -3,9 +3,14 @@
 # This file is used to test the elasticsearch init.d scripts.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/tests/75_bad_data_paths.bats

@@ -4,9 +4,14 @@
 # default.data.path setting into the data.path even when it doesn't belong.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/tests/80_upgrade.bats

@@ -5,9 +5,14 @@
 # fancy rolling restarts.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/tests/90_reinstall.bats

@@ -5,9 +5,14 @@
 # fancy rolling restarts.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/tests/module_and_plugin_test_cases.bash

@@ -5,9 +5,14 @@
 # rpm, and deb.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # The test case can be executed with the Bash Automated
 # Testing System tool available at https://github.com/sstephenson/bats

qa/vagrant/src/test/resources/packaging/utils/modules.bash

@@ -4,9 +4,14 @@
 # the .deb/.rpm packages and the SysV/Systemd scripts.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # Licensed to Elasticsearch under one or more contributor
 # license agreements. See the NOTICE file distributed with

qa/vagrant/src/test/resources/packaging/utils/packages.bash

@@ -4,9 +4,14 @@
 # the .deb/.rpm packages.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # Licensed to Elasticsearch under one or more contributor
 # license agreements. See the NOTICE file distributed with

qa/vagrant/src/test/resources/packaging/utils/plugins.bash

@@ -1,12 +1,17 @@
 #!/bin/bash
 
-# This file contains some utilities to test the elasticsearch scripts,
-# the .deb/.rpm packages and the SysV/Systemd scripts.
+# This file contains some utilities to test the elasticsearch
+# plugin installation and uninstallation process.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # Licensed to Elasticsearch under one or more contributor
 # license agreements. See the NOTICE file distributed with

qa/vagrant/src/test/resources/packaging/utils/tar.bash

@@ -1,12 +1,17 @@
 #!/bin/bash
 
-# This file contains some utilities to test the elasticsearch scripts,
-# the .deb/.rpm packages and the SysV/Systemd scripts.
+# This file contains some utilities to test the elasticsearch
+# tar distribution.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # Licensed to Elasticsearch under one or more contributor
 # license agreements. See the NOTICE file distributed with

qa/vagrant/src/test/resources/packaging/utils/utils.bash

@@ -4,9 +4,14 @@
 # the .deb/.rpm packages and the SysV/Systemd scripts.
 
 # WARNING: This testing file must be executed as root and can
-# dramatically change your system. It removes the 'elasticsearch'
-# user/group and also many directories. Do not execute this file
-# unless you know exactly what you are doing.
+# dramatically change your system. It should only be executed
+# in a throw-away VM like those made by the Vagrantfile at
+# the root of the Elasticsearch source code. This should
+# cause the script to fail if it is executed any other way:
+[ -f /etc/is_vagrant_vm ] || {
+  >&2 echo "must be run on a vagrant VM"
+  exit 1
+}
 
 # Licensed to Elasticsearch under one or more contributor
 # license agreements. See the NOTICE file distributed with