Connecting to a node over SSH

1. Run cmd.exe or powershell.exe.

2. Use the ssh-keygen command to create a new key. Run the command:

   $ ssh-keygen -t rsa -b 2048
   

   After the command runs, you will be asked to specify the names of files where the keys will be saved and enter the password for the private key. The default name is id_rsa. Keys are created in the C:\Users\<user name>\.ssh\ directory.

   The public part of the key will be saved in a file with the name <key name>.pub.

To create keys for Windows, use the PuTTY application.

1. Download and install PuTTY.

2. Make sure that the directory where you installed PuTTY is included in PATH:

   1. Right-click on My computer. Click Properties.
   2. In the window that opens, select Additional system parameters, then Environment variables (located in the lower part of the window).
   3. Under System variables, find PATH and click Edit.
   4. In the Variable value field, append the path to the directory where you installed PuTTY.

3. Launch the PuTTYgen app.

4. Select RSA for the type of pair to generate and set the length to 2048. Click Generate and move the cursor in the field above it until key creation is complete.

   

5. In Key passphrase, enter a strong password. Enter it again in the field below.

6. Click Save private key and save the private key. Never share it with anyone and do not tell anyone the passphrase for it.

7. Save the key in a text file in a single line. To do this, copy the public key from the text field to a text file with the name id_rsa.pub.

1. Open the Compute Cloud section in the folder where you created your Kubernetes cluster.
2. On the Virtual machines page, go to the Instance groups tab.
3. Click on the instance group with the name that matches the node group ID.
4. In the window that opens, go to the List of VMs tab.
5. Click the virtual machine that you want to find out the public address for.
6. The public IP address is shown in the Network section in Public IPv4.

1. Find out the ID of the instance group that corresponds to the node group.

   This parameter is shown in the INSTANCE GROUP ID column.

   $ yc managed-kubernetes node-group list
   +----------------------+----------------------+----------------+----------------------+---------------------+---------+------+
   |          ID          |      CLUSTER ID      |      NAME      |  INSTANCE GROUP ID   |     CREATED AT      | STATUS  | SIZE |
   +----------------------+----------------------+----------------+----------------------+---------------------+---------+------+
   | cat684ojo3irchtpeg84 | cata9ertn6tcr09bh9rm | test-nodegroup | cl17i6943n92sb98jifg | 2019-04-12 12:38:35 | RUNNING |    2 |
   +----------------------+----------------------+----------------+----------------------+---------------------+---------+------+
   

2. View the list of nodes that belong to this group.

   The public IP address of the node is shown in the IP column after the ~ character.

   $ yc compute instance-group list-instances cl17i6943n92sb98jifg
   +----------------------+---------------------------+--------------------------+---------------+----------------+
   |     INSTANCE ID      |           NAME            |            IP            |    STATUS     | STATUS MESSAGE |
   +----------------------+---------------------------+--------------------------+---------------+----------------+
   | ef31h24k03pg0mhunfm1 | cl17i6943n92sb98jifg-itif | 10.0.0.27~84.201.145.251 | RUNNING [53m] |                |
   | ef37ddhg9i7jhs7tc3pe | cl17i6943n92sb98jifg-ovah | 10.0.0.22~84.201.149.184 | RUNNING [53m] |                |
   +----------------------+---------------------------+--------------------------+---------------+----------------+
   

In Windows, a connection is established using the PuTTY application.

1. Run the Pageant application.
   1. Right-click on the Pageant icon in the task bar.
   2. In the context menu, select Add key.
   3. Select a PuTTY-generated private key in the .ppk format. If a password is set for the key, enter it.
2. Run PuTTY.

   1. In the Host Name (or IP address) field, enter the public IP address of the VM you want to connect to. Specify port 22 and SSH as the connection type.

      

   2. In the tree on the left, select Connection - SSH - Auth.

   3. Set the Allow agent forwarding option.

   4. In the Private key file for authentication field, select the file with the private key.

      

   5. Go back to the Sessions menu. In the Saved sessions field, enter any session name and click Save. The session settings are saved under the specified name. You can use this session profile to connect using Pageant.

      

   6. Click Open. If this is the first time you connect to the node, you might see a warning about an unknown host:

      

      Click Yes. A terminal window opens suggesting that you enter the login of the user on whose behalf the connection is being established. Type the user name you specified in the file with the public key and click Enter. If everything is configured correctly, the connection with the server will be established.

      

If you saved the session profile in PuTTY, you can use Pageant to establish a connection in the future:

1. Right-click on the Pageant icon in the task bar.
2. Select the Saved sessions menu item.
3. In the saved sessions list, select the necessary session.