this is my docker-compose.yml
version: '3.8'
services:
els01:
image: docker.elastic.co/elasticsearch/elasticsearch:8.11.3
hostname: els01
volumes:
- /mnt/data/els01:/usr/share/elasticsearch/data
ulimits:
memlock:
soft: -1
hard: -1
environment:
- node.name=els01
- node.roles=master
- xpack.security.transport.ssl.enabled=false
- xpack.security.enabled=false
- xpack.license.self_generated.type=basic
- cluster.initial_master_nodes=els01,els02,els03
- cluster.name=elk-cluster
- discovery.seed_hosts=els02,els03
- network.host=0.0.0.0
- bootstrap.memory_lock=true
- ES_JAVA_OPTS=-Xms2g -Xmx2g
ports:
- "9200:9200"
- "9300:9300"
deploy:
replicas: 1
healthcheck:
test: ["CMD", "curl", "-f", "http://localhost:9200/_cluster/health"]
interval: 30s
timeout: 10s
retries: 5
networks:
- elk
els02:
image: docker.elastic.co/elasticsearch/elasticsearch:8.11.3
hostname: els02
volumes:
- /mnt/data/els02:/usr/share/elasticsearch/data
ulimits:
memlock:
soft: -1
hard: -1
environment:
- node.name=els02
- xpack.security.transport.ssl.enabled=false
- node.roles=master
- xpack.security.enabled=false
- xpack.license.self_generated.type=basic
- network.host=0.0.0.0
- cluster.initial_master_nodes=els01,els02,els03
- cluster.name=elk-cluster
- discovery.seed_hosts=els01,els03
- bootstrap.memory_lock=true
- ES_JAVA_OPTS=-Xms2g -Xmx2g
ports:
- "9201:9200"
- "9301:9300"
deploy:
replicas: 1
healthcheck:
test: ["CMD", "curl", "-f", "http://localhost:9200/_cluster/health"]
interval: 30s
timeout: 10s
retries: 5
networks:
- elk
els03:
image: docker.elastic.co/elasticsearch/elasticsearch:8.11.3
hostname: els03
volumes:
- /mnt/data/els03:/usr/share/elasticsearch/data
ulimits:
memlock:
soft: -1
hard: -1
environment:
- node.name=els03
- xpack.security.transport.ssl.enabled=false
- node.roles=master
- network.host=0.0.0.0
- xpack.security.enabled=false
- xpack.license.self_generated.type=basic
- cluster.initial_master_nodes=els01,els02,els03
- cluster.name=elk-cluster
- discovery.seed_hosts=els01,els02
- bootstrap.memory_lock=true
- ES_JAVA_OPTS=-Xms2g -Xmx2g
ports:
- "9202:9200"
- "9302:9300"
deploy:
replicas: 1
healthcheck:
test: ["CMD", "curl", "-f", "http://localhost:9200/_cluster/health"]
interval: 30s
timeout: 10s
retries: 5
networks:
- elk
kibana:
image: docker.elastic.co/kibana/kibana:8.11.3
hostname: kibana
ports:
- "5601:5601"
environment:
- node.name=kibana
- ES_HOSTS=http://els01:9200,http://els02:9201,http://els03:9202
- elasticsearch.username=elastic
- elasticsearch.password=changeme
deploy:
replicas: 1
depends_on:
- els01
- els02
- els03
networks:
- elk
logstash:
image: docker.elastic.co/logstash/logstash:8.11.3
hostname: logstash
ports:
- "5044:5044"
- "9600:9600"
- "5000:5000/tcp"
- "5000:5000/udp"
environment:
- node.name=logstash
deploy:
replicas: 1
depends_on:
- els01
- els02
- els03
networks:
- elk
networks:
elk:
driver: overlay
internal: true
volumes:
els01:
driver: local
els02:
driver: local
els03:
driver: local
can anyone point on something false?
all of them "els01,els02,els03" says fail to resolve, but kibana container resolve logstash 
log of els01 :
rch.cluster.name":"elk-cluster","error.type":"java.net.UnknownHostException","error.message":"els03","error.stack_trace":"java.net.UnknownHostException: els03\n\tat java.base/java.net.InetAddress$CachedLookup.get(InetAddress.java:988)\n\tat java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1818)\n\tat java.base/java.net.InetAddress.getAllByName(InetAddress.java:1688)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.parse(TcpTransport.java:659)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.addressesFromString(TcpTransport.java:601)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TransportService.addressesFromString(TransportService.java:1089)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.discovery.SeedHostsResolver.lambda$resolveHosts$0(SeedHostsResolver.java:92)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:916)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\n"}
elk-cluster_els01.1.n1eep7o6442d@node03 | {"@timestamp":"2024-01-11T00:01:47.185Z", "log.level": "WARN", "message":"failed to resolve host [els02]", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[els01][cluster_coordination][T#1]","log.logger":"org.elasticsearch.discovery.SeedHostsResolver","elasticsearch.node.name":"els01","elasticsearch.cluster.name":"elk-cluster","error.type":"java.net.UnknownHostException","error.message":"els02: Name or service not known","error.stack_trace":"java.net.UnknownHostException: els02: Name or service not known\n\tat java.base/java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)\n\tat java.base/java.net.Inet4AddressImpl.lookupAllHostAddr(Inet4AddressImpl.java:43)\n\tat java.base/java.net.InetAddress$PlatformResolver.lookupByName(InetAddress.java:1211)\n\tat java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1828)\n\tat java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:1139)\n\tat java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1818)\n\tat java.base/java.net.InetAddress.getAllByName(InetAddress.java:1688)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.parse(TcpTransport.java:659)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.addressesFromString(TcpTransport.java:601)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TransportService.addressesFromString(TransportService.java:1089)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.discovery.SeedHostsResolver.lambda$resolveHosts$0(SeedHostsResolver.java:92)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:916)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\n"}
elk-cluster_els01.1.n1eep7o6442d@node03 | {"@timestamp":"2024-01-11T00:01:47.185Z", "log.level": "WARN", "message":"failed to resolve host [els03]", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[els01][cluster_coordination][T#1]","log.logger":"org.elasticsearch.discovery.SeedHostsResolver","elasticsearch.node.name":"els01","elasticsearch.cluster.name":"elk-cluster","error.type":"java.net.UnknownHostException","error.message":"els03: Name or service not known","error.stack_trace":"java.net.UnknownHostException: els03: Name or service not known\n\tat java.base/java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)\n\tat java.base/java.net.Inet4AddressImpl.lookupAllHostAddr(Inet4AddressImpl.java:43)\n\tat java.base/java.net.InetAddress$PlatformResolver.lookupByName(InetAddress.java:1211)\n\tat java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1828)\n\tat java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:1139)\n\tat java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1818)\n\tat java.base/java.net.InetAddress.getAllByName(InetAddress.java:1688)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.parse(TcpTransport.java:659)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.addressesFromString(TcpTransport.java:601)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TransportService.addressesFromString(TransportService.java:1089)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.discovery.SeedHostsResolver.lambda$resolveHosts$0(SeedHostsResolver.java:92)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:916)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\n"}
elk-cluster_els01.1.n1eep7o6442d@node03 | {"@timestamp":"2024-01-11T00:01:47.446Z", "log.level": "WARN", "message":"path: /_cluster/health, params: {}", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[els01][generic][T#3]","log.logger":"rest.suppressed","elasticsearch.node.name":"els01","elasticsearch.cluster.name":"elk-cluster","error.type":"org.elasticsearch.discovery.MasterNotDiscoveredException","error.stack_trace":"org.elasticsearch.discovery.MasterNotDiscoveredException\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$2.onTimeout(TransportMasterNodeAction.java:317)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.cluster.ClusterStateObserver$ContextPreservingListener.onTimeout(ClusterStateObserver.java:355)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:293)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.cluster.service.ClusterApplierService$NotifyTimeout.run(ClusterApplierService.java:645)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:916)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\n"}
elk-cluster_els01.1.n1eep7o6442d@node03 | {"@timestamp":"2024-01-11T00:01:48.134Z", "log.level": "WARN", "message":"failed to resolve host [els02]", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[els01][cluster_coordination][T#1]","log.logger":"org.elasticsearch.discovery.SeedHostsResolver","elasticsearch.node.name":"els01","elasticsearch.cluster.name":"elk-cluster","error.type":"java.net.UnknownHostException","error.message":"els02","error.stack_trace":"java.net.UnknownHostException: els02\n\tat java.base/java.net.InetAddress$CachedLookup.get(InetAddress.java:988)\n\tat java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1818)\n\tat java.base/java.net.InetAddress.getAllByName(InetAddress.java:1688)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.parse(TcpTransport.java:659)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.addressesFromString(TcpTransport.java:601)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TransportService.addressesFromString(TransportService.java:1089)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.discovery.SeedHostsResolver.lambda$resolveHosts$0(SeedHostsResolver.java:92)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:916)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\n"}
elk-cluster_els01.1.n1eep7o6442d@node03 | {"@timestamp":"2024-01-11T00:01:48.134Z", "log.level": "WARN", "message":"failed to resolve host [els03]", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[els01][cluster_coordination][T#1]","log.logger":"org.elasticsearch.discovery.SeedHostsResolver","elasticsearch.node.name":"els01","elasticsearch.cluster.name":"elk-cluster","error.type":"java.net.UnknownHostException","error.message":"els03","error.stack_trace":"java.net.UnknownHostException: els03\n\tat java.base/java.net.InetAddress$CachedLookup.get(InetAddress.java:988)\n\tat java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1818)\n\tat java.base/java.net.InetAddress.getAllByName(InetAddress.java:1688)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.parse(TcpTransport.java:659)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TcpTransport.addressesFromString(TcpTransport.java:601)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.transport.TransportService.addressesFromString(TransportService.java:1089)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.discovery.SeedHostsResolver.lambda$resolveHosts$0(SeedHostsResolver.java:92)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)\n\tat org.elasticsearch.server@8.11.3/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:916)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\n"}