fluentd unknown plugin elasticsearch

[vasanthaneppali]

Describe the bug

Hi
i am new to new fluentd, i am trying to upgrade the fluentd version from v1.11-debian to v1.14-debian.
i am running fluend with docker container
while copying volume i am unable to start the fluentd, in the logs it is showing like
2022-05-07 01:46:57 +0530 [error]: config error file="/fluentd/etc/fluent.conf" error_class=Fluent::ConfigError error="Unknown output plugin 'elasticsearch'. Run 'gem search -rd fluent-plugin' to find plugins"
please help

To Reproduce

....

Expected behavior

Want the fluentd container to be up

Your Environment

- Fluentd version:
- TD Agent version:
- Operating system:
- Kernel version:

Your Configuration

<match *.**>
  @type copy
  <store>
    @type elasticsearch
    host elasticsearchoss
    port 9200
    logstash_format true
    logstash_prefix fluentd
    logstash_dateformat %Y%m%d
    include_tag_key true
    type_name access_log
    tag_key @log_name
    flush_interval 1s
    rollover_index true # defaults to false
    index_date_pattern "now/w{xxxx.ww}" # defaults to "now/d"

Your Error Log

2022-05-07 14:33:57 +0530 [info]: parsing config file is succeeded path="/fluentd/etc/fluent.conf"
2022-05-07 14:33:58 +0530 [info]: gem 'fluentd' version '1.14.0'
2022-05-07 14:33:58 +0530 [error]: config error file="/fluentd/etc/fluent.conf" error_class=Fluent::ConfigError error="Unknown output plugin 'elasticsearch'. Run 'gem search -rd fluent-plugin' to find plugins"

Additional context

I am running it as docker image