High CPU Usage on Coordination Nodes with enabled Security

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):

Opensearch 2.9
Clustersize 300 Data Nodes
Coordiating Nodes 4
Leaders 3

Describe the issue:
When activating security the cpu usage on our coordinating nodes which are the first contact of the incoming bulk requests spike up to 100%+ . Without enabled security they are running with ~5-10% cpu usage.

Configuration:
User which performs the bulk requests has all_access role.
Bulk Size 5000
Indices ~9000
User is internal user and basic_internal_auth_domain has prio 0, ldap is configured with prio 5

Audit logging disabled

Relevant Logs or Screenshots:


Security was activated on the cpu spikes and got deactivated arrount 0:00

Output of hot_threads of one of the coordinating nodes:
   47.3% (236.6ms out of 500ms) cpu usage by thread 'opensearch[hostname][transport_worker][T#12]'
     6/10 snapshots sharing following 110 elements
       app//org.opensearch.cluster.metadata.IndexNameExpressionResolver.concreteIndexNames(IndexNameExpressionResolver.java:233)
       app//org.opensearch.cluster.metadata.IndexNameExpressionResolver.concreteIndexNames(IndexNameExpressionResolver.java:160)
       org.opensearch.security.securityconf.ConfigModelV7$IndexPattern.getResolvedIndexPattern(ConfigModelV7.java:827)
       org.opensearch.security.securityconf.ConfigModelV7$IndexPattern.attemptResolveIndexNames(ConfigModelV7.java:791)
       org.opensearch.security.securityconf.ConfigModelV7.lambda$impliesTypePerm$4(ConfigModelV7.java:1062)
       org.opensearch.security.securityconf.ConfigModelV7$$Lambda$5257/0x00000008013f3040.apply(Unknown Source)
       java.base@11.0.16.1/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
       java.base@11.0.16.1/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621)
       java.base@11.0.16.1/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
       java.base@11.0.16.1/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
       java.base@11.0.16.1/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:550)
       java.base@11.0.16.1/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
       java.base@11.0.16.1/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:517)
       org.opensearch.security.securityconf.ConfigModelV7.impliesTypePerm(ConfigModelV7.java:1063)
       org.opensearch.security.securityconf.ConfigModelV7$SecurityRoles.impliesTypePermGlobal(ConfigModelV7.java:516)
       org.opensearch.security.privileges.PrivilegesEvaluator.evaluate(PrivilegesEvaluator.java:524)
       org.opensearch.security.filter.SecurityFilter.apply0(SecurityFilter.java:377)
       org.opensearch.security.filter.SecurityFilter.apply(SecurityFilter.java:165)


Are we configuring something wrong? As the user has all_access the permission check should be quite fast?

@David2 Could you share your config.yml file?

Hi,

its an adapted default config which is running in other cluster quite fine - it seams that the amout of log ingest is just to much for the coordination nodes with enabled security:
Config:

---

# This is the main Open Distro Security configuration file where authentication
# and authorization is defined.
#
# You need to configure at least one authentication domain in the authc of this file.
# An authentication domain is responsible for extracting the user credentials from
# the request and for validating them against an authentication backend like Active Directory for example.
#
# If more than one authentication domain is configured the first one which succeeds wins.
# If all authentication domains fail then the request is unauthenticated.
# In this case an exception is thrown and/or the HTTP status is set to 401.
#
# After authentication authorization (authz) will be applied. There can be zero or more authorizers which collect
# the roles from a given backend for the authenticated user.
#
# Both, authc and auth can be enabled/disabled separately for REST and TRANSPORT layer. Default is true for both.
#        http_enabled: true
#        transport_enabled: true
#
# For HTTP it is possible to allow anonymous authentication. If that is the case then the HTTP authenticators try to
# find user credentials in the HTTP request. If credentials are found then the user gets regularly authenticated.
# If none can be found the user will be authenticated as an "anonymous" user. This user has always the username "anonymous"
# and one role named "anonymous_backendrole".
# If you enable anonymous authentication all HTTP authenticators will not challenge.
#
#
# Note: If you define more than one HTTP authenticators make sure to put non-challenging authenticators like "proxy" or "clientcert"
# first and the challenging one last.
# Because it's not possible to challenge a client with two different authentication methods (for example
# Kerberos and Basic) only one can have the challenge flag set to true. You can cope with this situation
# by using pre-authentication, e.g. sending a HTTP Basic authentication header in the request.
#
# Default value of the challenge flag is true.
#
#
# HTTP
#   basic (challenging)
#   proxy (not challenging, needs xff)
#   kerberos (challenging)
#   clientcert (not challenging, needs https)
#   jwt (not challenging)
#   host (not challenging) #DEPRECATED, will be removed in a future version.
#                          host based authentication is configurable in roles_mapping

# Authc
#   internal
#   noop
#   ldap

# Authz
#   ldap
#   noop



_meta:
  type: "config"
  config_version: 2

config:
  dynamic:
    # Set filtered_alias_mode to 'disallow' to forbid more than 2 filtered aliases per index
    # Set filtered_alias_mode to 'warn' to allow more than 2 filtered aliases per index but warns about it (default)
    # Set filtered_alias_mode to 'nowarn' to allow more than 2 filtered aliases per index silently
    #filtered_alias_mode: warn
    #do_not_fail_on_forbidden: false
    #kibana:
    # Kibana multitenancy
    #multitenancy_enabled: true
    #server_username: kibanaserver
    #index: '.kibana'
    http:
      anonymous_auth_enabled: false
      xff:
        enabled: false
        internalProxies: '192\.168\.0\.10|192\.168\.0\.11' # regex pattern
        #internalProxies: '.*' # trust all internal proxies, regex pattern
        #remoteIpHeader:  'x-forwarded-for'
        ###### see https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html for regex help
        ###### more information about XFF https://en.wikipedia.org/wiki/X-Forwarded-For
        ###### and here https://tools.ietf.org/html/rfc7239
        ###### and https://tomcat.apache.org/tomcat-8.0-doc/config/valve.html#Remote_IP_Valve
    authc:
      kerberos_auth_domain:
        http_enabled: false
        transport_enabled: false
        order: 6
        http_authenticator:
          type: kerberos
          challenge: true
          config:
            # If true a lot of kerberos/security related debugging output will be logged to standard out
            krb_debug: false
            # If true then the realm will be stripped from the user name
            strip_realm_from_principal: true
        authentication_backend:
          type: noop
      basic_internal_auth_domain:
        description: "Authenticate via HTTP Basic against internal users database"
        http_enabled: true
        transport_enabled: true
        order: 4
        http_authenticator:
          type: basic
          challenge: true
        authentication_backend:
          type: intern
      proxy_auth_domain:
        description: "Authenticate via proxy"
        http_enabled: false
        transport_enabled: false
        order: 3
        http_authenticator:
          type: proxy
          challenge: false
          config:
            user_header: "x-proxy-user"
            roles_header: "x-proxy-roles"
        authentication_backend:
          type: noop
      jwt_auth_domain:
        description: "Authenticate via Json Web Token"
        http_enabled: false
        transport_enabled: false
        order: 0
        http_authenticator:
          type: jwt
          challenge: false
          config:
            signing_key: "base64 encoded HMAC key or public RSA/ECDSA pem key"
            jwt_header: "Authorization"
            jwt_url_parameter: null
            roles_key: null
            subject_key: null
        authentication_backend:
          type: noop
      clientcert_auth_domain:
        description: "Authenticate via SSL client certificates"
        http_enabled: false
        transport_enabled: false
        order: 2
        http_authenticator:
          type: clientcert
          config:
            username_attribute: cn #optional, if omitted DN becomes username
          challenge: false
        authentication_backend:
          type: noop
      ldap:
        description: "Authenticate via LDAP or Active Directory"
        http_enabled: true
        transport_enabled: true
        order: 1
        http_authenticator:
          type: basic
          challenge: false
        authentication_backend:
          # LDAP authentication backend (authenticate users against a LDAP or Active Directory)
          type: ldap
          config:
            # enable ldaps
            enable_ssl: true
            # enable start tls, enable_ssl should be false
            enable_start_tls: false
            # send client certificate
            enable_ssl_client_auth: false
            # verify ldap hostname
            verify_hostnames: true
            hosts:
            - $LDAPSERVER
            bind_dn: $LDAPUSER
            password: $LDAPPASS
            userbase: 'cn=enterprise,o=something,c=de'
            # Filter to search for users (currently in the whole subtree beneath userbase)
            # {0} is substituted with the username
            usersearch: '(uid={0})'
            # Use this attribute from the user as username (if not set then DN is used)
            username_attribute: cn
    authz:
      roles_from_myldap:
        description: "Authorize via LDAP or Active Directory"
        http_enabled: true
        transport_enabled: true
        authorization_backend:
          # LDAP authorization backend (gather roles from a LDAP or Active Directory, you have to configure the above LDAP authentication backend settings too)
          type: ldap
          config:
            # enable ldaps
            enable_ssl: true
            # enable start tls, enable_ssl should be false
            enable_start_tls: false
            # send client certificate
            enable_ssl_client_auth: false
            # verify ldap hostname
            verify_hostnames: true
            hosts:
            - $LDAPSERVER
            bind_dn: $LDAPUSER
            password: $LDAPPASS
            rolebase: 'ou=corporation,cn=enterprise,o=something,c=de'
            # Filter to search for roles (currently in the whole subtree beneath rolebase)
            # {0} is substituted with the DN of the user
            # {1} is substituted with the username
            # {2} is substituted with an attribute value from user's directory entry, of the authenticated user. Use userroleattribute to specify the name of the attribute
            rolesearch: '(member={0})'
            # Specify the name of the attribute which value should be substituted with {2} above
            userroleattribute: null
            # Roles as an attribute of the user entry
            userrolename: disabled
            #userrolename: memberOf
            # The attribute in a role entry containing the name of that role, Default is "name".
            # Can also be "dn" to use the full DN as rolename.
            rolename: cn
            # Resolve nested roles transitive (roles which are members of other roles and so on ...)
            resolve_nested_roles: false
            userbase: 'cn=something,o=something,c=de'
            # Filter to search for users (currently in the whole subtree beneath userbase)
            # {0} is substituted with the username
            usersearch: '(uid={0})'
            # Skip users matching a user name, a wildcard or a regex pattern
            skip_users:
            - kibanaserver
            #  - 'cn=Michael Jackson,ou*people,o=TEST'
            #  - '/\S*/'
      roles_from_another_ldap:
        description: "Authorize via another Active Directory"
        http_enabled: false
        transport_enabled: false
        authorization_backend:
          type: ldap
          #config goes here ...
  #    auth_failure_listeners:
  #      ip_rate_limiting:
  #        type: ip
  #        allowed_tries: 10
  #        time_window_seconds: 3600
  #        block_expiry_seconds: 600
  #        max_blocked_clients: 100000
  #        max_tracked_clients: 100000
  #      internal_authentication_backend_limiting:
  #        type: username
  #        authentication_backend: intern
  #        allowed_tries: 10
  #        time_window_seconds: 3600
  #        block_expiry_seconds: 600
  #        max_blocked_clients: 100000
  #        max_tracked_clients: 100000