Why I don't see Tomcat after run docker tomcat? - docker

Question

I am quite new with Docker. I follow this tutorial: https://stackjava.com/docker/huong-dan-cai-apache-tomcat-bang-docker-sua-port-username-password.html
My command
docker pull tomcat
docker run -it tomcat
docker ps -a
docker inspect -f '{{json .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' 5e55df1c76bb
docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' 5e55df1c76bb
docker inspect 5e55df1c76bb
docker inspect --format="{{json .NetworkSettings.Networks}}" 5e55df1c76bb
172.17.0.2
but I access: http://172.17.0.2:8080 see nothing
C:\Users\donhuvy>docker inspect 5e55df1c76bb
[
{
"Id": "5e55df1c76bb8dff9e423b7750b62594e150bb2468b033acad18ea9f7d445229",
"Created": "2020-10-05T16:02:40.7573065Z",
"Path": "catalina.sh",
"Args": [
"run"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 987,
"ExitCode": 0,
"Error": "",
"StartedAt": "2020-10-05T16:02:41.1437801Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:f796d3d2c1954864eae249749f0a17480fb446c22053f4451e2c3514c561638b",
"ResolvConfPath": "/var/lib/docker/containers/5e55df1c76bb8dff9e423b7750b62594e150bb2468b033acad18ea9f7d445229/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/5e55df1c76bb8dff9e423b7750b62594e150bb2468b033acad18ea9f7d445229/hostname",
"HostsPath": "/var/lib/docker/containers/5e55df1c76bb8dff9e423b7750b62594e150bb2468b033acad18ea9f7d445229/hosts",
"LogPath": "/var/lib/docker/containers/5e55df1c76bb8dff9e423b7750b62594e150bb2468b033acad18ea9f7d445229/5e55df1c76bb8dff9e423b7750b62594e150bb2468b033acad18ea9f7d445229-json.log",
"Name": "/recursing_mirzakhani",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"Capabilities": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "private",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
29,
125
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": [],
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DeviceRequests": null,
"KernelMemory": 0,
"KernelMemoryTCP": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": null,
"OomKillDisable": false,
"PidsLimit": null,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"MaskedPaths": [
"/proc/asound",
"/proc/acpi",
"/proc/kcore",
"/proc/keys",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/timer_stats",
"/proc/sched_debug",
"/proc/scsi",
"/sys/firmware"
],
"ReadonlyPaths": [
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger"
]
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/73d16111a45bdfadbd3504d2ce0c252f2fd5f03d7a7f1340b35f68179d06ff52-init/diff:/var/lib/docker/overlay2/4f4ba32e9f0e1ab529e63310679569d7dcc1e661711b9ee4318e2ee65891f994/diff:/var/lib/docker/overlay2/fce4dda91aa387a1637fcac186996c18e34f8972cc7556023a84ceed8f9547c6/diff:/var/lib/docker/overlay2/f57b2ab773944fe913da9c109de5d74d21f79c5f6b00e9362247916de89a480b/diff:/var/lib/docker/overlay2/1fb80e26e111dac4d0afd9cd069da39b0e4d6005f649fefc9f62786d644ef10c/diff:/var/lib/docker/overlay2/71d4caaff5263b8a146f8e512cdc94ddd5a64d0ce06aefd2806b17ba7b2bb1e1/diff:/var/lib/docker/overlay2/94bbeff68944707d4ec182874b3054e241f87f184cc73370fd2a4872cc7ee4f5/diff:/var/lib/docker/overlay2/ff0f6369023d7c463b55141759b930eadbeacb60dcb2f64b27bef652dffb754c/diff:/var/lib/docker/overlay2/0d067db196d1894c9685f3bd71d2f5ee6e321784de6ec2ccd8f2ce0744042083/diff:/var/lib/docker/overlay2/f9bd339ee715bbed03a969664abfe5aa89f39c22cb42a69d89a9a989edd17257/diff:/var/lib/docker/overlay2/a92a068cbd132637742e14d1df96c081342ba8ab10663ef87197058b39e618e5/diff",
"MergedDir": "/var/lib/docker/overlay2/73d16111a45bdfadbd3504d2ce0c252f2fd5f03d7a7f1340b35f68179d06ff52/merged",
"UpperDir": "/var/lib/docker/overlay2/73d16111a45bdfadbd3504d2ce0c252f2fd5f03d7a7f1340b35f68179d06ff52/diff",
"WorkDir": "/var/lib/docker/overlay2/73d16111a45bdfadbd3504d2ce0c252f2fd5f03d7a7f1340b35f68179d06ff52/work"
},
"Name": "overlay2"
},
"Mounts": [],
"Config": {
"Hostname": "5e55df1c76bb",
"Domainname": "",
"User": "",
"AttachStdin": true,
"AttachStdout": true,
"AttachStderr": true,
"ExposedPorts": {
"8080/tcp": {}
},
"Tty": true,
"OpenStdin": true,
"StdinOnce": true,
"Env": [
"PATH=/usr/local/tomcat/bin:/usr/local/openjdk-11/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"LANG=C.UTF-8",
"JAVA_HOME=/usr/local/openjdk-11",
"JAVA_VERSION=11.0.8",
"CATALINA_HOME=/usr/local/tomcat",
"TOMCAT_NATIVE_LIBDIR=/usr/local/tomcat/native-jni-lib",
"LD_LIBRARY_PATH=/usr/local/tomcat/native-jni-lib",
"GPG_KEYS=05AB33110949707C93A279E3D3EFE6B686867BA6 07E48665A34DCAFAE522E5E6266191C37C037D42 47309207D818FFD8DCD3F83F1931D684307A10A5 541FBE7D8F78B25E055DDEE13C370389288584E7 61B832AC2F1C5A90F0F9B00A1C506407564C17A3 79F7026C690BAA50B92CD8B66A3AD3F4F22C4FED 9BA44C2621385CB966EBA586F72C284D731FABEE A27677289986DB50844682F8ACB77FC2E86E29AC A9C5DF4D22E99998D9875A5110C01C5A2F6059E7 DCFD35E0BF8CA7344752DE8B6FB21E8933C60243 F3A04C595DB5B6A5F1ECA43E3B7BBB100D811BBE F7DA48BB64BCB84ECBA7EE6935CD23C10D498E23",
"TOMCAT_MAJOR=9",
"TOMCAT_VERSION=9.0.38",
"TOMCAT_SHA512=37117164c9ab985b4f3032deac9617cee01463f8822586a62a9c498d2720fac23a8207fcf7a76cea2fcb3c6f828ff12b7b31422316a7d92e707c3bd8d687e303"
],
"Cmd": [
"catalina.sh",
"run"
],
"Image": "tomcat",
"Volumes": null,
"WorkingDir": "/usr/local/tomcat",
"Entrypoint": null,
"OnBuild": null,
"Labels": {}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "c2b2e13e21b94eb338ce47eb6f7319f719bd1d617fef7535d81f10210408be2a",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"8080/tcp": null
},
"SandboxKey": "/var/run/docker/netns/c2b2e13e21b9",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "f9582dfa8c2818b7f9846bf45fe3b56e671ca89efd2adab77c512d958beede7d",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "85106b65ae7140fb90ba8edcb0247f2fcf904f84cd540e6689613b5615b95bb5",
"EndpointID": "f9582dfa8c2818b7f9846bf45fe3b56e671ca89efd2adab77c512d958beede7d",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02",
"DriverOpts": null
}
}
}
}
]
C:\Users\donhuvy>
How to see the result of Tomcat on web browser?

Answer 1

I think the tutorial you are referring to is a bit outdated. You can run the tomcat docker container using a command like
docker run --rm --name tomcat-server -p 8080:8080 tomcat:latest
Access tomcat at http://localhost:8080
Further information is here. You would initially get a 404 as the webapp folder is empty. You can refer to this documentation which should help in getting a basic Tomcat installation running. You can then follow from step 3 of the original tutorial you are refer to.
docker exec -it tomcat-server /bin/bash
mv webapps webapps2
mv webapps.dist/ webapps
exit