Filebeat unable to connect to ECE

ntran · February 19, 2020, 10:59am

Hi all,

I have installed filebeat to send logs to a production ECE deployment.
Filebeat was installed successfully and I can see it is harvesting files, however, it is unable to ship them to ECE.

These are the logs:

Feb 19 14:52:49 hrc-ece-centos74 filebeat[47017]: 2020-02-19T14:52:49.148+0400 ERROR pipeline/output.go:100 Failed to connect to backoff(elasticsearch(https://4f02406a0dashdiasd33a23725be1f.dns:9243)): Get https://4f02406a0dashdiasd33a23725be1f.dns:9243: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
Feb 19 14:52:49 ece-centos74 filebeat[47017]: 2020-02-19T14:52:49.149+0400 INFO pipeline/output.go:93 Attempting to reconnect to backoff(elasticsearch(https://4f02406a0dashdiasd33a23725be1f.dns:9243)) with 75 reconnect attempt(s)
Feb 19 14:52:49 ece-centos74 filebeat[47017]: 2020-02-19T14:52:49.149+0400 INFO [publisher] pipeline/retry.go:196 retryer: send unwait-signal to consumer
Feb 19 14:52:49 ece-centos74 filebeat[47017]: 2020-02-19T14:52:49.149+0400 INFO [publisher] pipeline/retry.go:198 done
Feb 19 14:52:49 ece-centos74 filebeat[47017]: 2020-02-19T14:52:49.149+0400 INFO [publisher] pipeline/retry.go:173 retryer: send wait signal to consumer
Feb 19 14:52:49 ece-centos74 filebeat[47017]: 2020-02-19T14:52:49.149+0400 INFO [publisher] pipeline/retry.go:175 done

This is my filebeat.yml file

########Filebeat Configuration Example ###############
#=========================== Filebeat inputs =============================
filebeat.inputs:
- type: log
  enabled: true
  paths:
    - var/log/messages
#==================== Elasticsearch template setting ==========================

setup.template.settings:
  index.number_of_shards: 1
  #index.codec: best_compression
  #_source.enabled: false
  output.elasticsearch.index: "test-%{[agent.version]}-%{+yyyy.MM.dd}"
  setup.template.name: "test-case"
  setup.template.pattern: "test-*"
#================================ Outputs =====================================

#-------------------------- Elasticsearch output ------------------------------
output.elasticsearch:
  # Array of hosts to connect to.
  hosts: ["4f02406a0d9a3yfhdsufdsf23725be1f.dns:9243"]
  #index: "test-%{[agent.version]}-%{+yyyy.MM.dd}"

  # Protocol - either `http` (default) or `https`.
  protocol: "https"

  # Authentication credentials - either API key or username/password.
  #api_key: "id:api_key"
  username: "elastic"
  password: "changeme"

#----------------------------- Logstash output --------------------------------
#output.logstash:
  # The Logstash hosts
  #hosts: ["localhost:5044"]

  # Optional SSL. By default is off.
  # List of root certificates for HTTPS server verifications
  #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

  # Certificate for SSL client authentication
  #ssl.certificate: "/etc/pki/client/cert.pem"

  # Client Certificate Key
  #ssl.key: "/etc/pki/client/cert.key"

Any help is greatly appreciated.
Thanks,
Nhung

Alex_Piggott · February 19, 2020, 2:49pm

Does curl -k -u elastic:changeme 'https://$CLUSTER_ID.dns:9243' from the same host work? If not what does it return (-vvv)

My guess would be that there's a firewall or something in the way based on Client.Timeout exceeded while awaiting headers ... timeout would indicate that something is blocking the connection

ntran · February 20, 2020, 9:34am

Thanks for your help @Alex_Piggott

This is the response:

[root@ece-centos74 bin]# curl -k -u elastic:changeme 'https://$CLUSTER_ID.dns:9243'
curl: (7) Failed connect to $CLUSTER_ID.dns:9243; Connection timed out

[root@hrc-ece-centos74 bin]# curl -k -u elastic:changeme 'https://$CLUSTER_ID.dns:9243' -vvv
* About to connect() to $CLUSTER_ID.dns:9243 (#0)
* Trying $IP_ADDRESS...

I have resolved the issue now. The host was trying to connect to an IP it doesn't have access to. I've put in a manual entry to my etc/hosts file which routes the correct IP to my DNS entry. After doing so,

[root@hrc-ece-centos74 ~]# curl -k -u elastic:changeme 'https://$CLOUD_ID.dns:9243' -vvv
* About to connect() to CLOUD_ID.dns port 9243 (#0)
* Trying $IP_ADDRESS...
* Connected to $CLOUD_ID.dns ($IP_ADDRESS) port 9243 (#0)

ntran · February 23, 2020, 1:05pm

Hi @Alex_Piggott,

I am now getting these error messages:

Feb 23 16:55:42 ece-centos74 filebeat: 2020-02-23T16:55:42.524+0400#011ERROR#011pipeline/output.go:100#011Failed to connect to backoff(elasticsearch(https://$CLOUD_ID.dns:9243)): Get https://$CLOUD_ID.dns:9243: x509: certificate signed by unknown authority

Feb 23 16:55:42 ece-centos74 filebeat: 2020-02-23T16:55:42.524+0400#011INFO#011pipeline/output.go:93#011Attempting to reconnect to backoff(elasticsearch(https://$CLOUD_ID.dns:9243)) with 8 reconnect attempt(s)

Feb 23 16:55:42 ece-centos74 filebeat: 2020-02-23T16:55:42.524+0400#011DEBUG#011[elasticsearch]#011elasticsearch/client.go:733#011ES Ping(url=https://4f02406a0d9a4181a44233a23725be1f.10.60.34.13:9243)

Feb 23 16:55:42 centos74 filebeat: 2020-02-23T16:55:42.524+0400#011INFO#011[publisher]#011pipeline/retry.go:196#011retryer: send unwait-signal to consumer

Feb 23 16:55:42 hrc-ece-centos74 filebeat: 2020-02-23T16:55:42.524+0400#011INFO#011[publisher]#011pipeline/retry.go:198#011 done

Feb 23 16:55:42 ece-centos74 filebeat: 2020-02-23T16:55:42.524+0400#011INFO#011[publisher]#011pipeline/retry.go:173#011retryer: send wait signal to consumer

Feb 23 16:55:42 ece-centos74 filebeat: 2020-02-23T16:55:42.524+0400#011INFO#011[publisher]#011pipeline/retry.go:175#011 done

Feb 23 16:55:42 ece-centos74 filebeat: 2020-02-23T16:55:42.537+0400#011DEBUG#011[elasticsearch]#011elasticsearch/client.go:737#011Ping request failed with: Get https://$CLOUD_ID.dns:9243: x509: certificate signed by unknown authority

I am still able to curl successfully and in ECE, my certificates are fine. The certificates are single sign-on and I created them with elasticsearch-certutil on a different machine, NOT on one of my ECE machines.

Thanks,
Nhung

ntran · February 23, 2020, 2:31pm

This is really interesting now

The configuration below produces the above logs where I am getting a certificate error.

###################### Filebeat Configuration Example #########################
#=========================== Filebeat inputs =============================
filebeat.inputs:
- type: log
 # Change to true to enable this input configuration.
 enabled: true
 # Paths that should be crawled and fetched. Glob based paths.
 paths:
  - /var/log/*.log
  #- c:\programdata\elasticsearch\logs\*
  - /var/log/elasticsearch/elasticsearch-*.json
#================================ Outputs =====================================
# Configure what output to use when sending the data collected by the beat.
#-------------------------- Elasticsearch output ------------------------------
output.elasticsearch:
 # Array of hosts to connect to.
 hosts: ["localhost:9200"]
 index: "filebeat-test"
setup.template:
 enabled: false
 # Protocol - either `http` (default) or `https`.
 protocol: "https"
 ssl.verification_mode: "none"
 # Authentication credentials - either API key or username/password.
 #api_key: "id:api_key"
 username: "elastic"
 password: "changeme"
#----------------------------- Logstash output --------------------------------
#output.logstash:
 # The Logstash hosts
 #hosts: ["https://$CLOUD_ID.dns:9243"]
 # Optional SSL. By default is off.
 # List of root certificates for HTTPS server verifications
 #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]
 # Certificate for SSL client authentication
 #ssl.certificate: "/etc/pki/client/cert.pem"
 # Client Certificate Key
 #ssl.key: "/etc/pki/client/cert.key"
#================================ Logging =====================================
# Sets log level. The default log level is info.
# Available log levels are: error, warning, info, debug
#logging.level: debug
# At debug level, you can selectively enable logging only for some components.
# To enable all selectors use ["*"]. Examples of other selectors are "beat",
# "publish", "service".
#logging.selectors: ["*"]
logging.level: info
logging.to_files: true 
logging.files:
 path: /var/log/filebeat

This configuration below DOES NOT produce the above logs and I can see the index in elasticsearch:

###################### Filebeat Configuration Example #########################
#=========================== Filebeat inputs =============================
filebeat.inputs:
- type: log
# Change to true to enable this input configuration.
enabled: true
# Paths that should be crawled and fetched. Glob based paths.
paths:
- /var/log/.log
#- c:\programdata\elasticsearch\logs*
- /var/log/elasticsearch/elasticsearch-.json
#================================ Outputs =====================================
# Configure what output to use when sending the data collected by the beat.
#-------------------------- Elasticsearch output ------------------------------
output.elasticsearch:
# Array of hosts to connect to.
hosts: ["localhost:9200"]
#index: "filebeat-test"
#setup.template:
#enabled: false
# Protocol - either http (default) or https.
protocol: "https"
ssl.verification_mode: "none"
# Authentication credentials - either API key or username/password.
#api_key: "id:api_key"
username: "elastic"
password: "changeme"
#----------------------------- Logstash output --------------------------------
#output.logstash:
# The Logstash hosts
#hosts: ["https://$CLOUD_ID.dns:9243"]
# Optional SSL. By default is off.
# List of root certificates for HTTPS server verifications
#ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]
# Certificate for SSL client authentication
#ssl.certificate: "/etc/pki/client/cert.pem"
# Client Certificate Key
#ssl.key: "/etc/pki/client/cert.key"
#================================ Logging =====================================
# Sets log level. The default log level is info.
# Available log levels are: error, warning, info, debug
#logging.level: debug
# At debug level, you can selectively enable logging only for some components.
# To enable all selectors use [""]. Examples of other selectors are "beat",
# "publish", "service".
#logging.selectors: [""]
logging.level: info
logging.to_files: true
logging.files:
path: /var/log/filebeat

Have you seen this issue before?
Thanks,
Nhung

Alex_Piggott · February 24, 2020, 2:12pm

Are those 2 config files both definitely what you used?

The top one appears to have no output configured at all, while the second has https but hosts: ["localhost:9200"] (which is the HTTP port)

And in both files you have output.logstash: pointing to hosts: ["https://$CLOUD_ID.dns:9243"] but commented out?

ntran · February 25, 2020, 4:40am

Hi @Alex_Piggott,

Sorry, that was my fault

This filebeat.yml file (the only difference is that I am trying to change the index name) gives me the error messages above - x509: certificate signed by unknown authority

###################### Filebeat Configuration Example #########################
#=========================== Filebeat inputs =============================

filebeat.inputs:

- type: log

 # Change to true to enable this input configuration.
 enabled: true

 # Paths that should be crawled and fetched. Glob based paths.
 paths:
  - /var/log/*.log
  #- c:\programdata\elasticsearch\logs\*
  - /var/log/elasticsearch/elasticsearch-*.json

#================================ Outputs =====================================

# Configure what output to use when sending the data collected by the beat.

#-------------------------- Elasticsearch output ------------------------------
output.elasticsearch:
  # Array of hosts to connect to.
  hosts: ["https://$CLOUD_ID.dns:9243"]
  index: "filebeat-test"

setup.template:
  name: "filebeat"
  pattern: "filebeat*"
  enabled: "false"

  # Protocol - either `http` (default) or `https`.
  protocol: "https"
  ssl.verification_mode: "none"
  ssl.enabled: "true"
  ssl.certificate_authorities: ["/usr/share/elasticsearch/ca/ca/ca.crt"]
  ssl.certificate: "/usr/share/elasticsearch/ca/instance/instance.crt"
  ssl.key: "/usr/share/elasticsearch/ca/instance/instance.key"

  # Authentication credentials - either API key or username/password.
  #api_key: "id:api_key"
  username: "elastic"
  password: "changeme"

#----------------------------- Logstash output --------------------------------
#output.logstash:
 # The Logstash hosts
 #hosts: ["localhost:5044"]

 # Optional SSL. By default is off.
 # List of root certificates for HTTPS server verifications
 #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

 # Certificate for SSL client authentication
 #ssl.certificate: "/etc/pki/client/cert.pem"

 # Client Certificate Key
 #ssl.key: "/etc/pki/client/cert.key"

#================================ Logging =====================================

# Sets log level. The default log level is info.
# Available log levels are: error, warning, info, debug
#logging.level: debug

# At debug level, you can selectively enable logging only for some components.
# To enable all selectors use ["*"]. Examples of other selectors are "beat",
# "publish", "service".
#logging.selectors: ["*"]
logging.level: info
logging.to_files: true 
logging.files:
 path: /var/log/filebeat

This filebeat.yml file (the only difference is that I am using the default index name) gives me NO error messages and I can see the index in elasticsearch plus the logs

###################### Filebeat Configuration Example #########################
#=========================== Filebeat inputs =============================

filebeat.inputs:

- type: log

 # Change to true to enable this input configuration.
 enabled: true

 # Paths that should be crawled and fetched. Glob based paths.
 paths:
  - /var/log/*.log
  #- c:\programdata\elasticsearch\logs\*
  - /var/log/elasticsearch/elasticsearch-*.json

#================================ Outputs =====================================

# Configure what output to use when sending the data collected by the beat.

#-------------------------- Elasticsearch output ------------------------------
output.elasticsearch:
  # Array of hosts to connect to.
  hosts: ["https://$CLOUD_ID.dns:9243"]
  #index: "filebeat-test"

#setup.template:
  #name: "filebeat"
  #pattern: "filebeat*"
  #enabled: "false"

  # Protocol - either `http` (default) or `https`.
  protocol: "https"
  ssl.verification_mode: "none"
  ssl.enabled: "true"
  ssl.certificate_authorities: ["/usr/share/elasticsearch/ca/ca/ca.crt"]
  ssl.certificate: "/usr/share/elasticsearch/ca/instance/instance.crt"
  ssl.key: "/usr/share/elasticsearch/ca/instance/instance.key"

  # Authentication credentials - either API key or username/password.
  #api_key: "id:api_key"
  username: "elastic"
  password: "changeme"

#----------------------------- Logstash output --------------------------------
#output.logstash:
 # The Logstash hosts
 #hosts: ["localhost:5044"]

 # Optional SSL. By default is off.
 # List of root certificates for HTTPS server verifications
 #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

 # Certificate for SSL client authentication
 #ssl.certificate: "/etc/pki/client/cert.pem"

 # Client Certificate Key
 #ssl.key: "/etc/pki/client/cert.key"

#================================ Logging =====================================

# Sets log level. The default log level is info.
# Available log levels are: error, warning, info, debug
#logging.level: debug

# At debug level, you can selectively enable logging only for some components.
# To enable all selectors use ["*"]. Examples of other selectors are "beat",
# "publish", "service".
#logging.selectors: ["*"]
logging.level: info
logging.to_files: true 
logging.files:
 path: /var/log/filebeat

Thanks,
Nhung

ntran · February 25, 2020, 4:43am

How I created my certificates:

/usr/share/elasticsearch/bin/elasticsearch- **cert** util cert --pem --dns '*.$ECE_IP_[1.ip.es.io](http://1.ip.es.io/)' --dns '*.$ECE_IP_[2.ip.es.io](http://2.ip.es.io/)' --dns '*.$ECE_IP_[3.ip.es.io](http://3.ip.es.io/)' --ip '$ECE_IP_1 --ip '$ECE_IP_2' --ip '$ECE_IP_3' --dns '*.$ECE_[LB.ip.es.io](http://lb.ip.es.io/)' -ip '$PUBLIC_IP_USED_TO_SEND_LOGS' --dns '*.$ECE_LB'

I get three outputs:

ca.crt - CA cert which is signed ( All certificates that are generated by this command are signed by a CA - https://www.elastic.co/guide/en/elasticsearch/reference/current/certutil.html)
instance.key - private key
instance.crt - certificate

I concatenated them and uploaded it successfully into the Cloud UI
I then copied the certificates into this server I am trying to send logs from. The path to the certificates are referenced in the filebeat.yml

Alex_Piggott · February 25, 2020, 2:56pm

Oh I think I see ... all those ssl.* fields are under setup.template in the YAML, so don't get applied?

When you comment out setup.template then they "switch" to being under output.elasticsearch instead and get applied?!

Try moving setup.template to immediately above the "Logstash output" header line and comment things back in

ntran · February 26, 2020, 4:20am

THANK YOU SO MUCH @Alex_Piggott!!!

For those who had the same issue as me, this was my final filebeat.yml file

 ###################### Filebeat Configuration Example #########################
    #=========================== Filebeat inputs =============================

    filebeat.inputs:

    - type: log

     # Change to true to enable this input configuration.
     enabled: true

     # Paths that should be crawled and fetched. Glob based paths.
     paths:
      - /var/log/*.log
      #- c:\programdata\elasticsearch\logs\*
      - /var/log/elasticsearch/elasticsearch-*.json

    #================================ Outputs =====================================

    # Configure what output to use when sending the data collected by the beat.

    #-------------------------- Elasticsearch output ------------------------------
    output.elasticsearch:
      # Array of hosts to connect to.
      hosts: ["https://$CLOUD_ID.dns:9243"]
      index: "filebeat-test"

      # Protocol - either `http` (default) or `https`.
      protocol: "https"
      ssl.verification_mode: "none"
      ssl.enabled: "true"
      ssl.certificate_authorities: ["/usr/share/elasticsearch/ca/ca/ca.crt"]
      ssl.certificate: "/usr/share/elasticsearch/ca/instance/instance.crt"
      ssl.key: "/usr/share/elasticsearch/ca/instance/instance.key"

      # Authentication credentials - either API key or username/password.
      #api_key: "id:api_key"
      username: "elastic"
      password: "changeme"

    setup.template:
      name: "filebeat"
      pattern: "filebeat*"
      enabled: "false"
    #----------------------------- Logstash output --------------------------------
    #output.logstash:
     # The Logstash hosts
     #hosts: ["localhost:5044"]

     # Optional SSL. By default is off.
     # List of root certificates for HTTPS server verifications
     #ssl.certificate_authorities: ["/etc/pki/root/ca.pem"]

     # Certificate for SSL client authentication
     #ssl.certificate: "/etc/pki/client/cert.pem"

     # Client Certificate Key
     #ssl.key: "/etc/pki/client/cert.key"

    #================================ Logging =====================================

    # Sets log level. The default log level is info.
    # Available log levels are: error, warning, info, debug
    #logging.level: debug

    # At debug level, you can selectively enable logging only for some components.
    # To enable all selectors use ["*"]. Examples of other selectors are "beat",
    # "publish", "service".
    #logging.selectors: ["*"]
    logging.level: info
    logging.to_files: true 
    logging.files:
     path: /var/log/filebeat

system · March 11, 2020, 4:20am

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