Class: TrainPlugins::TrainKubernetes::File::Linux

Inherits:
Train::File::Remote::Linux
  • Object
show all
Defined in:
lib/train-kubernetes/file/linux.rb

Instance Method Summary collapse

Constructor Details

#initialize(backend, path, pod:, follow_symlink: true, **args) ⇒ Linux

Returns a new instance of Linux.



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# File 'lib/train-kubernetes/file/linux.rb', line 8

def initialize(backend, path, pod:, follow_symlink: true, **args)
  @backend = backend
  @path = path || ""
  @follow_symlink = follow_symlink
  @pod = pod
  @container = args[:container]
  @namespace = args[:namespace]

  sanitize_filename(path)
  super(backend, path, follow_symlink)
end

Instance Method Details

#content ⇒ Object 



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# File 'lib/train-kubernetes/file/linux.rb', line 20

def content
  return @content if defined?(@content)

  @content = @backend.run_command("cat #{@spath} || echo -n",
                                  { pod: pod, namespace: namespace, container: container })
    .stdout
  return @content unless @content.empty?

  @content = nil if directory? || size.nil? || (size > 0)
  @content
end

#content=(new_content) ⇒ Object 



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# File 'lib/train-kubernetes/file/linux.rb', line 32

def content=(new_content)
  execute_result = @backend.run_command("base64 --help", { pod: pod, namespace: namespace, container: container })
  if execute_result.exit_status != 0
    raise TransportError, "#{self.class} found no base64 binary for file writes"
  end

  unix_cmd = format("echo '%<base64>s' | base64 --decode > %<file>s",
                    base64: Base64.strict_encode64(new_content),
                    file: @spath)

  @backend.run_command(unix_cmd, { pod: pod, namespace: namespace, container: container })

  @content = new_content
end

#exist? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/train-kubernetes/file/linux.rb', line 47

def exist?
  @exist ||= begin
    f = @follow_symlink ? "" : " || test -L #{@spath}"
    @backend.run_command("test -e #{@spath}" + f,
                         { pod: pod, namespace: namespace, container: container })
      .exit_status == 0
  end
end

#inherited? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/train-kubernetes/file/linux.rb', line 124

def inherited?
  return false unless exist?

  skip_resource "`inherited?` is not supported on your Linux Containers yet."
end

#mounted ⇒ Object 



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# File 'lib/train-kubernetes/file/linux.rb', line 56

def mounted
  @mounted ||=
    @backend.run_command("mount | grep -- ' on #{@path} '",
                         { pod: pod, namespace: namespace, container: container })
end

#path ⇒ Object 



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# File 'lib/train-kubernetes/file/linux.rb', line 62

def path
  return @path unless @follow_symlink && symlink?

  @link_path ||= read_target_path
end

#shallow_link_path ⇒ Object 



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# File 'lib/train-kubernetes/file/linux.rb', line 68

def shallow_link_path
  return nil unless symlink?

  @shallow_link_path ||=
    @backend.run_command("readlink #{@spath}", { pod: pod, namespace: namespace, container: container })
      .stdout
      .chomp
end

#source ⇒ Object 



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# File 'lib/train-kubernetes/file/linux.rb', line 110

def source
  if @follow_symlink
    self.class.new(@backend, @path, false, pod: pod, container: container, namespace: namespace)
  else
    self
  end
end

#stat ⇒ Object 



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# File 'lib/train-kubernetes/file/linux.rb', line 77

def stat
  @stat ||= begin
    shell_escaped_path = @spath
    backend = @backend
    follow_symlink = @follow_symlink
    lstat = follow_symlink ? " -L" : ""
    format = "--printf"
    res = backend.run_command("stat#{lstat} #{shell_escaped_path} 2>/dev/null #{format} '%s\n%f\n%U\n%u\n%G\n%g\n%X\n%Y\n%C'",
                              { pod: pod, namespace: namespace, container: container })
    # ignore the exit_code: it is != 0 if selinux labels are not supported
    # on the system.

    fields = res.stdout.split("\n")
    return {} if fields.length != 9

    tmask = fields[1].to_i(16)
    selinux = fields[8]
    ## selinux security context string not available on esxi
    selinux = nil if (selinux == "?") || (selinux == "(null)") || (selinux == "C")
    {
      type: Train::Extras::Stat.find_type(tmask),
      mode: tmask & 07777,
      owner: fields[2],
      uid: fields[3].to_i,
      group: fields[4],
      gid: fields[5].to_i,
      mtime: fields[7].to_i,
      size: fields[0].to_i,
      selinux_label: selinux,
    }
  end
end

#user_permissions ⇒ Object 



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# File 'lib/train-kubernetes/file/linux.rb', line 118

def user_permissions
  return {} unless exist?

  skip_reource "`user_permissions` is not supported on your Linux Containers yet."
end