bundler: failed to load command: puma

エラー内容

pumaを起動するとbundler: failed to load command: pumaと言われる。

$ bundle exec puma -t 5:5 -p 3000 -e development -C config/puma.rb
Puma starting in single mode...
* Version 3.12.1 (ruby 2.5.1-p57), codename: Llamas in Pajamas
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://0.0.0.0:3000
bundler: failed to load command: puma (/PRJ_ROOT/vendor/bundle/ruby/2.5.0/bin/puma)
Errno::ENOENT: No such file or directory @ rb_sysopen - tmp/pids/server.pid
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/gems/puma-3.12.1/lib/puma/launcher.rb:133:in `initialize'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/gems/puma-3.12.1/lib/puma/launcher.rb:133:in `open'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/gems/puma-3.12.1/lib/puma/launcher.rb:133:in `write_pid'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/gems/puma-3.12.1/lib/puma/launcher.rb:106:in `write_state'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/gems/puma-3.12.1/lib/puma/single.rb:103:in `run'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/gems/puma-3.12.1/lib/puma/launcher.rb:186:in `run'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/gems/puma-3.12.1/lib/puma/cli.rb:80:in `run'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/gems/puma-3.12.1/bin/puma:10:in `<top (required)>'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/bin/puma:23:in `load'
  /PRJ_ROOT/vendor/bundle/ruby/2.5.0/bin/puma:23:in `<top (required)>'

解決策

以下2つのディレクトリを作成する。

$ mkdir tmp/sockets
$ mkdir tmp/pids

起動した。

$ bundle exec puma -t 5:5 -p 3000 -e development -C config/puma.rb
Puma starting in single mode...
* Version 3.12.1 (ruby 2.5.1-p57), codename: Llamas in Pajamas
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://0.0.0.0:3000
Use Ctrl-C to stop