Hi,
can you show us your configuration? If you just start filebeat / metricbeat/ any-beat you see it with docker container logs ...
e.g.
$ docker run -d --name=filebeat docker.elastic.co/beats/filebeat:7.4.1
3d0c9f1a7325cdd905c508a1030703dc55c0e86ddc6cb2ad31b9e4ec5af0b4ca
$ docker container logs filebeat
2019-11-12T18:12:37.894Z INFO instance/beat.go:607 Home path: [/usr/share/filebeat] Config path: [/usr/share/filebeat] Data path: [/usr/share/filebeat/data] Logs path: [/usr/share/filebeat/logs]
2019-11-12T18:12:37.897Z INFO instance/beat.go:615 Beat ID: 336fd8da-136e-4a21-b09c-ef60cfef44dc
2019-11-12T18:12:37.898Z INFO [seccomp] seccomp/seccomp.go:124 Syscall filter successfully installed
2019-11-12T18:12:37.899Z INFO [beat] instance/beat.go:903 Beat info {"system_info": {"beat": {"path": {"config": "/usr/share/filebeat", "data": "/usr/share/filebeat/data", "home": "/usr/share/filebeat", "logs": "/usr/share/filebeat/logs"}, "type": "filebeat", "uuid": "336fd8da-136e-4a21-b09c-ef60cfef44dc"}}}
2019-11-12T18:12:37.899Z INFO [beat] instance/beat.go:912 Build info {"system_info": {"build": {"commit": "12ee6cd05c1bfdc69721ddab1f473417b1514576", "libbeat": "7.4.1", "time": "2019-10-22T16:22:37.000Z", "version": "7.4.1"}}}
2019-11-12T18:12:37.899Z INFO [beat] instance/beat.go:915 Go runtime info {"system_info": {"go": {"os":"linux","arch":"amd64","max_procs":8,"version":"go1.12.9"}}}
2019-11-12T18:12:37.900Z INFO add_cloud_metadata/add_cloud_metadata.go:87 add_cloud_metadata: hosting provider type not detected.
2019-11-12T18:12:37.900Z INFO [beat] instance/beat.go:919 Host info {"system_info": {"host": {"architecture":"x86_64","boot_time":"2019-11-12T18:10:58Z","containerized":true,"name":"3d0c9f1a7325","ip":["127.0.0.1/8","172.17.0.2/16"],"kernel_version":"4.9.184-linuxkit","mac":["02:42:ac:11:00:02"],"os":{"family":"redhat","platform":"centos","name":"CentOS Linux","version":"7 (Core)","major":7,"minor":6,"patch":1810,"codename":"Core"},"timezone":"UTC","timezone_offset_sec":0}}}
2019-11-12T18:12:37.901Z INFO [beat] instance/beat.go:948 Process info {"system_info": {"process": {"capabilities": {"inheritable":["chown","dac_override","fowner","fsetid","kill","setgid","setuid","setpcap","net_bind_service","net_raw","sys_chroot","mknod","audit_write","setfcap"],"permitted":null,"effective":null,"bounding":["chown","dac_override","fowner","fsetid","kill","setgid","setuid","setpcap","net_bind_service","net_raw","sys_chroot","mknod","audit_write","setfcap"],"ambient":null}, "cwd": "/usr/share/filebeat", "exe": "/usr/share/filebeat/filebeat", "name": "filebeat", "pid": 1, "ppid": 0, "seccomp": {"mode":"filter"}, "start_time": "2019-11-12T18:12:36.630Z"}}}
2019-11-12T18:12:37.901Z INFO instance/beat.go:292 Setup Beat: filebeat; Version: 7.4.1
2019-11-12T18:12:37.901Z INFO [index-management] idxmgmt/std.go:178 Set output.elasticsearch.index to 'filebeat-7.4.1' as ILM is enabled.
2019-11-12T18:12:37.901Z INFO elasticsearch/client.go:170 Elasticsearch url: http://elasticsearch:9200
2019-11-12T18:12:37.902Z INFO [publisher] pipeline/module.go:97 Beat name: 3d0c9f1a7325
2019-11-12T18:12:37.903Z INFO [monitoring] log/log.go:118 Starting metrics logging every 30s
2019-11-12T18:12:37.903Z INFO instance/beat.go:422 filebeat start running.
2019-11-12T18:12:37.903Z INFO registrar/migrate.go:104 No registry home found. Create: /usr/share/filebeat/data/registry/filebeat
2019-11-12T18:12:37.903Z INFO registrar/migrate.go:112 Initialize registry meta file
2019-11-12T18:12:37.905Z INFO registrar/registrar.go:108 No registry file found under: /usr/share/filebeat/data/registry/filebeat/data.json. Creating a new registry file.
2019-11-12T18:12:37.907Z INFO registrar/registrar.go:145 Loading registrar data from /usr/share/filebeat/data/registry/filebeat/data.json
2019-11-12T18:12:37.907Z INFO registrar/registrar.go:152 States Loaded from registrar: 0
2019-11-12T18:12:37.907Z INFO crawler/crawler.go:72 Loading Inputs: 0
2019-11-12T18:12:37.907Z INFO crawler/crawler.go:106 Loading and starting Inputs completed. Enabled inputs: 0
2019-11-12T18:12:37.907Z INFO cfgfile/reload.go:171 Config reloader started
2019-11-12T18:12:37.908Z INFO cfgfile/reload.go:226 Loading of config files completed.