How do I connect from my host to a mysql server running in a docker container?
Question
I am unable to connect from my host(OSX 10.13.6) to a mysql server running in a docker container.
If I start a mysql server(mariadb) on my host (not using docker), I can use the mysql client to successfully connect to the mysql server:
~$ mysql.server start
Starting MariaDB
.200805 13:41:03 mysqld_safe Logging to '/usr/local/var/mysql/My-MacBook-Pro-2.local.err'.
200805 13:41:03 mysqld_safe Starting mysqld daemon with databases from /usr/local/var/mysql
SUCCESS!
~$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.5.5-10.4.13-MariaDB Homebrew
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use mydb;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> select * from people;
+----+--------+------+
| id | name | info |
+----+--------+------+
| 1 | 7stud | abc |
| 2 | Beth | xxx |
| 3 | Diane | xyz |
| 4 | Kathy | xyz |
| 5 | Kathy | xyz |
| 6 | Dave | efg |
| 7 | Tom | zzz |
| 8 | David | abc |
| 9 | Eloise | abc |
| 10 | Jess | xyz |
| 11 | Jeffsy | 2.0 |
| 12 | XXX | xxx |
| 13 | XXX | xxx |
+----+--------+------+
13 rows in set (0.00 sec)
mysql> exit
Bye
~$ mysql.server stop
Shutting down MariaDB
.. SUCCESS!
Next, if I run a mysql server inside a docker container, I can successfully connect to the mysql server from within the container:
~$ docker run --rm --name my-mysql -e MYSQL_ROOT_PASSWORD=kathy -p 3606:3606 -d mysql
7457d62496b109fda41b57dea026cc6762bb2b7e754cb3e1987228b55ec461f7
~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7457d62496b1 mysql "docker-entrypoint.s…" 2 seconds ago Up 2 seconds 3306/tcp, 33060/tcp, 0.0.0.0:3606->3606/tcp my-mysql
~$ docker exec -it my-mysql bash
root@7457d62496b1:/# mysql -u root -p
Enter password: kathy
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.21 MySQL Community Server - GPL
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.01 sec)
mysql> exit
Bye
root@7457d62496b1:/# exit
exit
~$
But, if I try to connect from my host to the mysql server running in the docker container, I am unsuccessful:
~$ mysql -h 127.0.0.1:3306 -u root -p
Enter password: kathy
ERROR 2005 (HY000): Unknown MySQL server host '127.0.0.1:3306' (0)
~$ docker inspect my-mysql
[
{
"Id": "7457d62496b109fda41b57dea026cc6762bb2b7e754cb3e1987228b55ec461f7",
"Created": "2020-08-05T19:49:32.0561306Z",
"Path": "docker-entrypoint.sh",
"Args": [
"mysqld"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 7109,
"ExitCode": 0,
"Error": "",
"StartedAt": "2020-08-05T19:49:32.4423804Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:0d64f46acfd1af4ee6a162f80c6e07e843761bf14d412060023bf0e69e720fb4",
"ResolvConfPath": "/var/lib/docker/containers/7457d62496b109fda41b57dea026cc6762bb2b7e754cb3e1987228b55ec461f7/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/7457d62496b109fda41b57dea026cc6762bb2b7e754cb3e1987228b55ec461f7/hostname",
"HostsPath": "/var/lib/docker/containers/7457d62496b109fda41b57dea026cc6762bb2b7e754cb3e1987228b55ec461f7/hosts",
"LogPath": "/var/lib/docker/containers/7457d62496b109fda41b57dea026cc6762bb2b7e754cb3e1987228b55ec461f7/7457d62496b109fda41b57dea026cc6762bb2b7e754cb3e1987228b55ec461f7-json.log",
"Name": "/my-mysql",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {
"3606/tcp": [
{
"HostIp": "",
"HostPort": "3606"
}
]
},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": true,
"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": [
0,
0
],
"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/bd8cf726bca86b4a5da2253ba4d8fd809e7888bd0a8585337e365f00d4ce0a3c-init/diff:/var/lib/docker/overlay2/d28436ec5b86d97829d4db76ecac79feedf9d7de78be7fac9364b9030e5501c6/diff:/var/lib/docker/overlay2/b4ccb4e64dccd4466971f59b4ddefc0d69943e8a0bb6327dbeccd602d2550378/diff:/var/lib/docker/overlay2/b033c732901687d589a6bd69df8249f661fc9221b8305b32084dfd506dd6014f/diff:/var/lib/docker/overlay2/7078174167da7480c3bea6bf1bb831c1de53479e6c866ac88634ba83560c702e/diff:/var/lib/docker/overlay2/413086cc620e9c9a9bfab7fccaa0cb7e5836419ad52453ae76accf6c9f09be8d/diff:/var/lib/docker/overlay2/0a2c718ad2009d757554e539995cf5901bca5cd1a5ffb9d430ee137fb843adc8/diff:/var/lib/docker/overlay2/00e175c2a0975b7663ccadde84d5bd2f8ea957e9e302ab5c20a9840e34ddd0c5/diff:/var/lib/docker/overlay2/7be82f60f3b9fcb23d0d6336005987dd2c98667622833b58fa9f6362a2a02ba5/diff:/var/lib/docker/overlay2/8c347ec6ae30e0109728c0a056d36b5c64b8f907ec482dc9680bc2d8cfe6e9ad/diff:/var/lib/docker/overlay2/aaf2ed3d56a5312f4daf6efe6f456d95e54cda92e4efe972862c43489d891d3d/diff:/var/lib/docker/overlay2/88bacf56afbf61f9f8c94037a48df63c9fd549682ecf2c446a705ae661f6fe51/diff:/var/lib/docker/overlay2/3b9cf88d35e75201fd69adf020d396d079f7a513b64bd799c118459fe13446af/diff",
"MergedDir": "/var/lib/docker/overlay2/bd8cf726bca86b4a5da2253ba4d8fd809e7888bd0a8585337e365f00d4ce0a3c/merged",
"UpperDir": "/var/lib/docker/overlay2/bd8cf726bca86b4a5da2253ba4d8fd809e7888bd0a8585337e365f00d4ce0a3c/diff",
"WorkDir": "/var/lib/docker/overlay2/bd8cf726bca86b4a5da2253ba4d8fd809e7888bd0a8585337e365f00d4ce0a3c/work"
},
"Name": "overlay2"
},
"Mounts": [
{
"Type": "volume",
"Name": "f11c80d7d01140465818fac7d5f7e6083ff509abe8591166a20caa1f568c7646",
"Source": "/var/lib/docker/volumes/f11c80d7d01140465818fac7d5f7e6083ff509abe8591166a20caa1f568c7646/_data",
"Destination": "/var/lib/mysql",
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
}
],
"Config": {
"Hostname": "7457d62496b1",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"3306/tcp": {},
"33060/tcp": {},
"3606/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"MYSQL_ROOT_PASSWORD=kathy",
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"GOSU_VERSION=1.12",
"MYSQL_MAJOR=8.0",
"MYSQL_VERSION=8.0.21-1debian10"
],
"Cmd": [
"mysqld"
],
"Image": "mysql",
"Volumes": {
"/var/lib/mysql": {}
},
"WorkingDir": "",
"Entrypoint": [
"docker-entrypoint.sh"
],
"OnBuild": null,
"Labels": {}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "d7ae1d7c552ff3bd8e3b457646a314cddad73082d463ccca4c8d67a4c77aa574",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"3306/tcp": null,
"33060/tcp": null,
"3606/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "3606"
}
]
},
"SandboxKey": "/var/run/docker/netns/d7ae1d7c552f",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "a642243a0c85b09821ab0bb4e42d310e02a8c29e4b6949212776938c37d23019",
"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": "ce024a8603c56f96f22700049e12c7687e804c4f1aa00638ed9156ddab36b152",
"EndpointID": "a642243a0c85b09821ab0bb4e42d310e02a8c29e4b6949212776938c37d23019",
"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
}
}
}
}
]
~$ mysql -h 172.17.0.2:3306 -u root -p
Enter password: kathy
ERROR 2005 (HY000): Unknown MySQL server host '172.17.0.2:3306' (0)
~$ mysql -h localhost -P 3306 --protocol=tcp -u root -p
Enter password: kathy
ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (61)
~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7457d62496b1 mysql "docker-entrypoint.s…" 10 minutes ago Up 10 minutes 3306/tcp, 33060/tcp, 0.0.0.0:3606->3606/tcp my-mysql
What am I doing wrong?
Trying Neo Anderson's suggestion:
~$ docker run --rm --name my-mysql -e MYSQL_ROOT_PASSWORD=kathy -p 3306:3306 -d mysql
4cba45a3d758f53256fe88aa9e33ea709a23d0c55c035d4009bbc5685d2e09ee
~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4cba45a3d758 mysql "docker-entrypoint.s…" 4 seconds ago Up 4 seconds 0.0.0.0:3306->3306/tcp, 33060/tcp my-mysql
~$ mysql --host=127.0.0.1 -P 3306 --user=root -p
Enter password: kathy
ERROR 2026 (HY000): SSL connection error: unknown error number
I didn't have docker-machine installed, so I installed it, but I get:
~$ docker-machine ip default
Docker machine "default" does not exist. Use "docker-machine ls" to list machines. Use "docker-machine create" to add a new one.
~$ docker-machine ls
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
. .
Okay, got it! The reason for the SSL connection error :
mysql8 can not be accessed by mysql clients lower then version 8
On my host, I have mysql version:
~$ mysql --version
mysql Ver 14.14 Distrib 5.7.10, for osx10.9 (x86_64) using EditLine wrapper
and I am using the mysql client that came with mysql 5.7.10 to try to connect to the mysql server running in the docker container. But, the image running in the docker container is mysql:latest , and the latest version of mysql is 8.x . To fix everything, I used the docker image mysql:5.7 instead:
~$ docker run --rm --name my-mysql -e MYSQL_ROOT_PASSWORD=kathy -p 56789:3306 -d mysql:5.7
94dfc72013bec3fada45225153974173a816ffc4b8a424eea735d57fecf50c4c
Now I can connect from my host to a mysql server running in a docker container using the mysql 5.7 client on my host:
~$ mysql -P 56789 -u root -p
Enter password: kathy
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
The error there is due to the fact that tcp is not the default protocol, so you can either specify localhost as -h 127.0.0.1 , which implicitly sets the protocol to tcp, or you can explicitly set the protocol with --protocol=tcp :
~$ mysql -h 127.0.0.1 -P 56789 -u root -p
Enter password: kathy
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.31 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
or:
~$ mysql -P 56789 --protocol=tcp -u root -p
Enter password: kathy
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.31 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
1 answers
solution1
4 ACCPTED 2020-08-05 20:36:33
By default, the mysql image listens on port 3306.
In your docker run command you are using -p 3606:3606 . This creates a DNAT rule from your host 3606 to the container on the same port - where no service is listening.
Try to start the container with this command(note that the source can be any port that is not in use on your host - in the example below I kept your initial port 3606):
docker run --rm --name my-mysql -e MYSQL_ROOT_PASSWORD=kathy -p 3606:3306 -d mysql
To connect with the mysql client from the host to the container, add the -P (port) and specify explicitly that you are not using the default port:
mysql --host=127.0.0.1 -P 3606 --user=root -p
If this still does not work, run docker-machine ip default on your Mac and replace 127.0.0.1 with that IP address.
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