Vagrant port forwarding for Mysql

13
votes

I am trying to setup port forwarding in Vagrantfile to connect to guest mysqld from host system, but get reading initial communication packet error. Host: Yosemite, Guest: Trusty, vagrant 1.7.4

Vagrantfile(host):

config.vm.network "forwarded_port", guest: 80, host: 8080
config.vm.network "forwarded_port", guest: 3306, host: 3309

my.ini(guest):

bind-address            = 127.0.0.1

8080 forwarding works like a charm.

mysql -h127.0.0.1 -uroot -p from guest also works.

mysql -h127.0.0.1 -P 3309 -uroot -p from host results with reading initial communication packet error.

When I telnet from host, the connection instantly closes:

$ telnet localhost 3309
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.

Port forwarding works when I ssh to vagrant box from host:

$ssh vagrant@127.0.0.1 -p 2222 -L3308:localhost:3306

Then I can connect from host mysql -h127.0.0.1 -P3308 -uroot -p without problems, which I use as a temporary workaround.

3
mysqlvagrantportforwardingvagrantfile
do you have firewall rules that would block traffic on those ports ? – Frederic Henri
@FrédéricHenri no, it was my first suspect. There is no single iptable rule. Anyway, I tried to tunnel with ssh, and it works without problems. – Alex Blex
right but with the tunneling you still use the ssh port. – Frederic Henri
well, even with ssh tunnel over 2222, it should use 3306 on guest system to connect to mysqld, and 3309 on host for client. Anyway, I confirm there is no iptable rules on guest, and firewall is turned off on host. – Alex Blex

3 Answers

22
votes

was finally able to make it work -

edit the /etc/mysql/my.cnf file and make sure, either

  • you have bind-address = 0.0.0.0
  • or you comment the line #bind-address ...

You may need to add it to the mysqld section of the my.cnf file:

[mysqld]
bind-address = 0.0.0.0

make sure to restart your mysql server after the change

$ sudo service mysql restart

Then you can connect from your host - so I first had an error like

$ mysql -h127.0.0.1 -P 3309 -uroot -p
Enter password:
ERROR 1130 (HY000): Host '172.16.42.2' is not allowed to connect to this MySQL server

so I came back to the guest and did

vagrant@precise64:~$ mysql -h127.0.0.1 -uroot -p
...
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'172.16.42.2' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

Then I had no issue to connect from the host machine

$ mysql -h127.0.0.1 -P 3309 -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 36
Server version: 5.5.44-0ubuntu0.12.04.1 (Ubuntu)
2
votes

The first answer is right but not enough.when I connect MySQL, I get a error:

Host '10.0.2.2' is not allowed to connect to this MySQL server

Solution:

create user 'root'@'10.0.2.2' identified by 'password';

grant all privileges on . to 'root'@'10.0.2.2' with grant option;

flush privileges;

aha, all problems are solved,

2
votes

Personally I don't bother with modifying MySQL for development Vagrant boxes - it's time consuming and difficult to script in a provisioner meaning you have to do it by hand every time you vagrany destroy or a new developer starts contributing. Instead, I connect via SSH Tunnel which is made super easy using Vagrant's generated private_key file. No additional post-install tweaking necessary.

Follow these steps to SSH Tunnel with SequelPro, MySql Workbench, or any other client that supports SSH connectivity:

  • Choose SSH connection option
  • The "Host" in SSH mode becomes localhost or specifically 127.0.0.1 (more predictable cross-os)
  • The username/password is the database username/password. For development you can just use root and the password is defined/created in the provisioner (see snippet below)
  • The SSH username is Vagrant
  • No SSH password - just use the private_key for the Vagrant machine instead, located in .vagrant/machines/default/virtualbox in the root of your VM project; note that on most OS's this directory, and all starting with a . are hidden

To automate installation and root password creation, add this to your Vagrant provisioner script file (config.vm.provision in Vagrantfile), commonly named provisioner.sh:

debconf-set-selections <<< 'mysql-server mysql-server/root_password password SuperSecretPasswordHere'
debconf-set-selections <<< 'mysql-server mysql-server/root_password_again password SuperSecretPasswordHere'

apt-get install -y mysql-server

Hope this helps save someone else some time!