log is the following
{"type":"log","@timestamp":"2021-09-10T07:31:14+00:00","tags":["info","plugins-service"],"pid":1212,"message":"Plugin \"metricsEntities\" is disabled."}
{"type":"log","@timestamp":"2021-09-10T07:31:14+00:00","tags":["warning","config","deprecation"],"pid":1212,"message":"Support for setting server.host to \"0\" in kibana.yml is deprecated and will be removed in Kibana version 8.0.0. Instead use \"0.0.0.0\" to bind to all interfaces."}
{"type":"log","@timestamp":"2021-09-10T07:31:14+00:00","tags":["warning","config","deprecation"],"pid":1212,"message":"plugins.scanDirs is deprecated and is no longer used"}
{"type":"log","@timestamp":"2021-09-10T07:31:14+00:00","tags":["warning","config","deprecation"],"pid":1212,"message":"Config key [monitoring.cluster_alerts.email_notifications.email_address] will be required for email notifications to work in 8.0.\""}
{"type":"log","@timestamp":"2021-09-10T07:31:14+00:00","tags":["warning","config","deprecation"],"pid":1212,"message":"\"xpack.reporting.roles\" is deprecated. Granting reporting privilege through a \"reporting_user\" role will not be supported starting in 8.0. Please set \"xpack.reporting.roles.enabled\" to \"false\" and grant reporting privileges to users using Kibana application privileges **Management > Security > Roles**."}
{"type":"log","@timestamp":"2021-09-10T07:31:14+00:00","tags":["info","http","server","NotReady"],"pid":1212,"message":"http server running at http://0.0.0.0:5601"}
{"type":"log","@timestamp":"2021-09-10T07:31:14+00:00","tags":["info","plugins-system"],"pid":1212,"message":"Setting up [106] plugins: [translations,taskManager,licensing,globalSearch,globalSearchProviders,banners,licenseApiGuard,code,usageCollection,xpackLegacy,telemetryCollectionManager,telemetryCollectionXpack,kibanaUsageCollection,securityOss,share,screenshotMode,telemetry,newsfeed,mapsEms,mapsLegacy,legacyExport,kibanaLegacy,embeddable,uiActionsEnhanced,expressions,charts,esUiShared,bfetch,data,savedObjects,visualizations,visTypeXy,visTypeVislib,visTypeTimelion,features,visTypeTagcloud,visTypeTable,visTypePie,visTypeMetric,visTypeMarkdown,tileMap,regionMap,presentationUtil,timelion,home,searchprofiler,painlessLab,grokdebugger,graph,visTypeVega,management,watcher,licenseManagement,indexPatternManagement,advancedSettings,discover,discoverEnhanced,dashboard,dashboardEnhanced,visualize,visTypeTimeseries,savedObjectsManagement,spaces,security,transform,savedObjectsTagging,lens,reporting,canvas,lists,ingestPipelines,fileUpload,maps,dataVisualizer,encryptedSavedObjects,dataEnhanced,timelines,dashboardMode,cloud,upgradeAssistant,snapshotRestore,fleet,indexManagement,rollup,remoteClusters,crossClusterReplication,indexLifecycleManagement,enterpriseSearch,eventLog,actions,alerting,triggersActionsUi,stackAlerts,ruleRegistry,osquery,ml,cases,securitySolution,observability,uptime,infra,monitoring,logstash,console,apmOss,apm]"}
{"type":"log","@timestamp":"2021-09-10T07:31:14+00:00","tags":["info","plugins","taskManager"],"pid":1212,"message":"TaskManager is identified by the Kibana UUID: 242f7a18-fc19-4e93-bcc0-dd911b2f68ed"}
{"type":"log","@timestamp":"2021-09-10T07:31:15+00:00","tags":["warning","plugins","security","config"],"pid":1212,"message":"Generating a random key for xpack.security.encryptionKey. To prevent sessions from being invalidated on restart, please set xpack.security.encryptionKey in the kibana.yml or use the bin/kibana-encryption-keys command."}
{"type":"log","@timestamp":"2021-09-10T07:31:15+00:00","tags":["warning","plugins","security","config"],"pid":1212,"message":"Session cookies will be transmitted over insecure connections. This is not recommended."}
{"type":"log","@timestamp":"2021-09-10T07:31:15+00:00","tags":["warning","plugins","reporting","config"],"pid":1212,"message":"Generating a random key for xpack.reporting.encryptionKey. To prevent sessions from being invalidated on restart, please set xpack.reporting.encryptionKey in the kibana.yml or use the bin/kibana-encryption-keys command."}
{"type":"log","@timestamp":"2021-09-10T07:31:15+00:00","tags":["warning","plugins","reporting","config"],"pid":1212,"message":"Chromium sandbox provides an additional layer of protection, but is not supported for Linux CentOS 8.4.2105\n OS. Automatically setting 'xpack.reporting.capture.browser.chromium.disableSandbox: true'."}
{"type":"log","@timestamp":"2021-09-10T07:31:15+00:00","tags":["warning","plugins","encryptedSavedObjects"],"pid":1212,"message":"Saved objects encryption key is not set. This will severely limit Kibana functionality. Please set xpack.encryptedSavedObjects.encryptionKey in the kibana.yml or use the bin/kibana-encryption-keys command."}
{"type":"log","@timestamp":"2021-09-10T07:31:15+00:00","tags":["warning","plugins","actions","actions"],"pid":1212,"message":"APIs are disabled because the Encrypted Saved Objects plugin is missing encryption key. Please set xpack.encryptedSavedObjects.encryptionKey in the kibana.yml or use the bin/kibana-encryption-keys command."}
{"type":"log","@timestamp":"2021-09-10T07:31:15+00:00","tags":["warning","plugins","alerting","plugins","alerting"],"pid":1212,"message":"APIs are disabled because the Encrypted Saved Objects plugin is missing encryption key. Please set xpack.encryptedSavedObjects.encryptionKey in the kibana.yml or use the bin/kibana-encryption-keys command."}
{"type":"log","@timestamp":"2021-09-10T07:31:15+00:00","tags":["info","plugins","ruleRegistry"],"pid":1212,"message":"Write is disabled, not installing assets"}
{"type":"log","@timestamp":"2021-09-10T07:31:16+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"Waiting until all Elasticsearch nodes are compatible with Kibana before starting saved objects migrations..."}
{"type":"log","@timestamp":"2021-09-10T07:31:17+00:00","tags":["error","savedobjects-service"],"pid":1212,"message":"Unable to retrieve version information from Elasticsearch nodes. connect ECONNREFUSED 172.27.0.2:9200"}
{"type":"log","@timestamp":"2021-09-10T07:31:21+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"Starting saved objects migrations"}
{"type":"log","@timestamp":"2021-09-10T07:31:22+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana] INIT -> OUTDATED_DOCUMENTS_SEARCH_OPEN_PIT. took: 51ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:22+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana] OUTDATED_DOCUMENTS_SEARCH_OPEN_PIT -> OUTDATED_DOCUMENTS_SEARCH_READ. took: 19ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:22+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana_task_manager] INIT -> OUTDATED_DOCUMENTS_SEARCH_OPEN_PIT. took: 92ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:22+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana_task_manager] OUTDATED_DOCUMENTS_SEARCH_OPEN_PIT -> OUTDATED_DOCUMENTS_SEARCH_READ. took: 15ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:22+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana_task_manager] OUTDATED_DOCUMENTS_SEARCH_READ -> OUTDATED_DOCUMENTS_SEARCH_CLOSE_PIT. took: 41ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:22+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana_task_manager] OUTDATED_DOCUMENTS_SEARCH_CLOSE_PIT -> UPDATE_TARGET_MAPPINGS. took: 13ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:22+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana_task_manager] UPDATE_TARGET_MAPPINGS -> UPDATE_TARGET_MAPPINGS_WAIT_FOR_TASK. took: 480ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:23+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana_task_manager] UPDATE_TARGET_MAPPINGS_WAIT_FOR_TASK -> DONE. took: 646ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:23+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana_task_manager] Migration completed after 1288ms"}
{"type":"log","@timestamp":"2021-09-10T07:31:28+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana] Starting to process 19 documents."}
{"type":"log","@timestamp":"2021-09-10T07:31:28+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana] OUTDATED_DOCUMENTS_SEARCH_READ -> OUTDATED_DOCUMENTS_TRANSFORM. took: 6594ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:50+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana] OUTDATED_DOCUMENTS_TRANSFORM -> TRANSFORMED_DOCUMENTS_BULK_INDEX. took: 21885ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:52+00:00","tags":["info","savedobjects-service"],"pid":1212,"message":"[.kibana] TRANSFORMED_DOCUMENTS_BULK_INDEX -> FATAL. took: 2384ms."}
{"type":"log","@timestamp":"2021-09-10T07:31:52+00:00","tags":["error","savedobjects-service"],"pid":1212,"message":"[.kibana] migration failed, dumping execution log:"}