Hello,
I was trying to start Kibana as a service, but I noticed that after a few seconds from the start Kibana goes down.
In the /var/log/syslog file I saw this error:
Oct 24 17:24:18 ubuntu-linux-22-04-desktop kibana[40582]: FATAL Error: [config validation of [elasticsearch].u
sername]: value of "elastic" is forbidden. This is a superuser account that cannot write to system indices that
Kibana needs to function. Use a service account token instead. Learn more: https://www.elastic.co/guide/en/elast
icsearch/reference/8.0/service-accounts.html
So I'm trying to configure the service account token for the service account elastic/kibana.
I give this command to produce the following value for my token:
root@ubuntu-linux-22-04-desktop:/usr/share/elasticsearch/bin# ./elasticsearch-service-tokens create elastic/kibana kibana_token-1
SERVICE_TOKEN elastic/kibana/kibana_token-1 = AAEAAWVsYXN0aWMva2liYW5hL2tpYmFuYV90b2tlbi0xOk51WGNnUUxnUlVHckhYNTRlc2RXQlE
And when I try to visualise the file "service_tokens" I got this:
root@ubuntu-linux-22-04-desktop:/usr/share/elasticsearch/bin# cat /etc/elasticsearch/service_tokens
elastic/kibana/kibana_token-1:{PBKDF2_STRETCH}10000$nzu5ZW87KX0Q6woAMwhRvqftgx04vBjH2JbDV3xGWIA=$PKXIPPD2EbrKGjNidZ69YzZ6ydmyTzkY1xPm2EGD79Y=
that is different from the previous value I got from the prompt.
I tried both values to understand If kibana could connect to ES, but I receive always the same error.
root@ubuntu-linux-22-04-desktop:/etc/elasticsearch# curl -H "Authorization: Bearer AAEAAWVsYXN0aWMva2liYW5hL2tpYmFuYV90b2tlbi0xOk51WGNnUUxnUlVHckhYNTRlc2RXQlE" https://10.211.55.7:9200/_cluster/health
curl: (60) SSL certificate problem: unable to get local issuer certificate
More details here: https://curl.se/docs/sslcerts.html
curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.
ES
# ======================== Elasticsearch Configuration =========================
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
# Before you set out to tweak and tune the configuration, make sure you
# understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
#cluster.name: my-application
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
node.name: node-1
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
path.data: /var/lib/elasticsearch
#
# Path to log files:
#
path.logs: /var/log/elasticsearch
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
#bootstrap.memory_lock: true
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# By default Elasticsearch is only accessible on localhost. Set a different
# address here to expose this node on the network:
#
network.host: 10.211.55.7
#
# By default Elasticsearch listens for HTTP traffic on the first free port it
# finds starting at 9200. Set a specific HTTP port here:
#
http.port: 9200
#
# For more information, consult the network module documentation.
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when this node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
#discovery.seed_hosts: ["host1", "host2"]
#
# Bootstrap the cluster using an initial set of master-eligible nodes:
#
cluster.initial_master_nodes: ["node-1"]
#
# For more information, consult the discovery and cluster formation module documentation.
#
# --------------------------------- Readiness ----------------------------------
#
# Enable an unauthenticated TCP readiness endpoint on localhost
#
#readiness.port: 9399
#
# ---------------------------------- Various -----------------------------------
#
# Allow wildcard deletion of indices:
#
#action.destructive_requires_name: false
#----------------------- BEGIN SECURITY AUTO CONFIGURATION -----------------------
#
# The following settings, TLS certificates, and keys have been automatically
# generated to configure Elasticsearch security features on 19-10-2022 13:57:07
#
# --------------------------------------------------------------------------------
# Enable X-Pack security features
xpack.security.enabled: true
xpack.security.enrollment.enabled: true
# Enable encryption for HTTP API client connections, such as Kibana, Logstash, and Agents
#xpack.security.http.ssl:
# enabled: true
# keystore.path: certs/http.p12
# Enable encryption and mutual authentication between cluster nodes
#xpack.security.transport.ssl:
# enabled: true
# verification_mode: certificate
# keystore.path: certs/transport.p12
# truststore.path: certs/transport.p12
# Create a new cluster with the current node only
# Additional nodes can still join the cluster later
#cluster.initial_master_nodes: ["ubuntu-linux-22-04-desktop"]
# Allow HTTP API connections from anywhere
# Connections are encrypted and require user authentication
http.host: 0.0.0.0
# Allow other nodes to join the cluster from anywhere
# Connections are encrypted and mutually authenticated
#transport.host: 0.0.0.0
# Transport layer
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.key: /etc/elasticsearch/Elastic_CERTS/elasticsearch.key
xpack.security.transport.ssl.certificate: /etc/elasticsearch/Elastic_CERTS/elasticsearch.crt
xpack.security.transport.ssl.certificate_authorities: [ "/etc/elasticsearch/Elastic_CERTS/ca/ca.crt" ]
# HTTP layer
xpack.security.http.ssl.enabled: true
xpack.security.http.ssl.verification_mode: certificate
xpack.security.http.ssl.key: /etc/elasticsearch/Elastic_CERTS/elasticsearch.key
xpack.security.http.ssl.certificate: /etc/elasticsearch/Elastic_CERTS/elasticsearch.crt
xpack.security.http.ssl.certificate_authorities: [ "/etc/elasticsearch/Elastic_CERTS/ca/ca.crt" ]
#----------------------- END SECURITY AUTO CONFIGURATION -------------------------
Kibana
# For more configuration options see the configuration guide for Kibana in
# https://www.elastic.co/guide/index.html
# =================== System: Kibana Server ===================
# Kibana is served by a back end server. This setting specifies the port to use.
server.port: 5601
# Specifies the address to which the Kibana server will bind. IP addresses and host names are both valid values.
# The default is 'localhost', which usually means remote machines will not be able to connect.
# To allow connections from remote users, set this parameter to a non-loopback address.
server.host: "10.211.55.7"
# Enables you to specify a path to mount Kibana at if you are running behind a proxy.
# Use the `server.rewriteBasePath` setting to tell Kibana if it should remove the basePath
# from requests it receives, and to prevent a deprecation warning at startup.
# This setting cannot end in a slash.
#server.basePath: ""
# Specifies whether Kibana should rewrite requests that are prefixed with
# `server.basePath` or require that they are rewritten by your reverse proxy.
# Defaults to `false`.
#server.rewriteBasePath: false
# Specifies the public URL at which Kibana is available for end users. If
# `server.basePath` is configured this URL should end with the same basePath.
#server.publicBaseUrl: ""
# The maximum payload size in bytes for incoming server requests.
#server.maxPayload: 1048576
# The Kibana server's name. This is used for display purposes.
#server.name: "your-hostname"
# =================== System: Kibana Server (Optional) ===================
# Enables SSL and paths to the PEM-format SSL certificate and SSL key files, respectively.
# These settings enable SSL for outgoing requests from the Kibana server to the browser.
# These settings enable SSL for outgoing requests from the Kibana server to the>
server.ssl.enabled: true
server.ssl.certificate: "/etc/kibana/certs/kibana.crt"
server.ssl.key: "/etc/kibana/certs/kibana.key"
# =================== System: Elasticsearch ===================
# The URLs of the Elasticsearch instances to use for all your queries.
elasticsearch.hosts: ["https://10.211.55.7:9200"]
elasticsearch.ssl.certificateAuthorities: ["/etc/kibana/certs/ca/ca.crt"]
elasticsearch.ssl.certificate: "/etc/kibana/certs/kibana.crt"
elasticsearch.ssl.key: "/etc/kibana/certs/kibana.key"
# If your Elasticsearch is protected with basic authentication, these settings provide
# the username and password that the Kibana server uses to perform maintenance on the Kibana
# index at startup. Your Kibana users still need to authenticate with Elasticsearch, which
# is proxied through the Kibana server.
# Elastic Credentials
#The xpack.security.enabled setting no longer exists in Kibana 8.X.X
#xpack.security.enabled: true
elasticsearch.username: "elastic"
elasticsearch.password: "+hvLtT0MMhiqZu_D6_uL"
# Kibana can also authenticate to Elasticsearch via "service account tokens".
# Service account tokens are Bearer style tokens that replace the traditional username/password based configurat
ion.
# Use this token instead of a username/password.
# elasticsearch.serviceAccountToken: "my_token"
# Time in milliseconds to wait for Elasticsearch to respond to pings. Defaults to the value of
# the elasticsearch.requestTimeout setting.
#elasticsearch.pingTimeout: 1500
# Time in milliseconds to wait for responses from the back end or Elasticsearch. This value
# must be a positive integer.
#elasticsearch.requestTimeout: 30000
# The maximum number of sockets that can be used for communications with elasticsearch.
# Defaults to `Infinity`.
#elasticsearch.maxSockets: 1024
# Specifies whether Kibana should use compression for communications with elasticsearch
# Defaults to `false`.
#elasticsearch.compression: false
# List of Kibana client-side headers to send to Elasticsearch. To send *no* client-side
# headers, set this value to [] (an empty list).
#elasticsearch.requestHeadersWhitelist: [ authorization ]
# Header names and values that are sent to Elasticsearch. Any custom headers cannot be overwritten
# by client-side headers, regardless of the elasticsearch.requestHeadersWhitelist configuration.
#elasticsearch.customHeaders: {}
# Time in milliseconds for Elasticsearch to wait for responses from shards. Set to 0 to disable.
#elasticsearch.shardTimeout: 30000
# =================== System: Elasticsearch (Optional) ===================
# These files are used to verify the identity of Kibana to Elasticsearch and are required when
# xpack.security.http.ssl.client_authentication in Elasticsearch is set to required.
#elasticsearch.ssl.certificate: /path/to/your/client.crt
#elasticsearch.ssl.key: /path/to/your/client.key
# Enables you to specify a path to the PEM file for the certificate
# authority for your Elasticsearch instance.
#elasticsearch.ssl.certificateAuthorities: [ "/path/to/your/CA.pem" ]
# To disregard the validity of SSL certificates, change this setting's value to 'none'.
#elasticsearch.ssl.verificationMode: full
# =================== System: Logging ===================
# Set the value of this setting to off to suppress all logging output, or to debug to log everything. Defaults t
o 'info'
#logging.root.level: debug
# Enables you to specify a file where Kibana stores log output.
logging:
appenders:
file:
type: file
fileName: /var/log/kibana/kibana.log
layout:
type: json
root:
appenders:
- default
- file
# layout:
# type: json
# Logs queries sent to Elasticsearch.
#logging.loggers:
# - name: elasticsearch.query
# level: debug
# Logs http responses.
#logging.loggers:
# - name: http.server.response
# level: debug
# Logs system usage information.
#logging.loggers:
# - name: metrics.ops
# level: debug
# =================== System: Other ===================
# The path where Kibana stores persistent data not saved in Elasticsearch. Defaults to data
#path.data: data
# Specifies the path where Kibana creates the process ID file.
pid.file: /run/kibana/kibana.pid
# Set the interval in milliseconds to sample system and process performance
# metrics. Minimum is 100ms. Defaults to 5000ms.
#ops.interval: 5000
# Specifies locale to be used for all localizable strings, dates and number formats.
# Supported languages are the following: English (default) "en", Chinese "zh-CN", Japanese "ja-JP", French "fr-F
R".
#i18n.locale: "en"
# =================== Frequently used (Optional)===================
# =================== Saved Objects: Migrations ===================
# Saved object migrations run at startup. If you run into migration-related issues, you might need to adjust the
se settings.
# The number of documents migrated at a time.
# If Kibana can't start up or upgrade due to an Elasticsearch `circuit_breaking_exception`,
# use a smaller batchSize value to reduce the memory pressure. Defaults to 1000 objects per batch.
#migrations.batchSize: 1000
# The maximum payload size for indexing batches of upgraded saved objects.
# To avoid migrations failing due to a 413 Request Entity Too Large response from Elasticsearch.
# This value should be lower than or equal to your Elasticsearch cluster’s `http.max_content_length`
# configuration option. Default: 100mb
#migrations.maxBatchSizeBytes: 100mb
# The number of times to retry temporary migration failures. Increase the setting
# if migrations fail frequently with a message such as `Unable to complete the [...] step after
# 15 attempts, terminating`. Defaults to 15
#migrations.retryAttempts: 15
# =================== Search Autocomplete ===================
# Time in milliseconds to wait for autocomplete suggestions from Elasticsearch.
# This value must be a whole number greater than zero. Defaults to 1000ms
#unifiedSearch.autocomplete.valueSuggestions.timeout: 1000
# Maximum number of documents loaded by each shard to generate autocomplete suggestions.
# This value must be a whole number greater than zero. Defaults to 100_000
#unifiedSearch.autocomplete.valueSuggestions.terminateAfter: 100000
Now I'm trying to understand how service accounts work, and how can I add the service account token and the service account in the .tml files.
And why I'm receiving the last error when I try to curl es, when the certificates and public/private keys are configured.
Thank u very much