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op-guide: update tidb-ansible and version note #615

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Sep 11, 2018
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op-guide: update tidb-ansible and version note #615

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18 changes: 14 additions & 4 deletions op-guide/ansible-deployment.md
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Expand Up @@ -89,10 +89,15 @@ Make sure you have logged in to the Control Machine using the `root` user accoun
```
4. Generate the SSH key.

Execute the `su` command to switch the user from `root` to `tidb`. Create the SSH key for the `tidb` user account and hit the Enter key when `Enter passphrase` is prompted. After successful execution, the SSH private key file is `/home/tidb/.ssh/id_rsa`, and the SSH public key file is `/home/tidb/.ssh/id_rsa.pub`.
Execute the `su` command to switch the user from `root` to `tidb`.

```
# su - tidb
```

Create the SSH key for the `tidb` user account and hit the Enter key when `Enter passphrase` is prompted. After successful execution, the SSH private key file is `/home/tidb/.ssh/id_rsa`, and the SSH public key file is `/home/tidb/.ssh/id_rsa.pub`.

```
$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/tidb/.ssh/id_rsa):
Expand All @@ -119,11 +124,16 @@ Make sure you have logged in to the Control Machine using the `root` user accoun

## Step 3: Download TiDB-Ansible to the Control Machine

1. Log in to the Control Machine using the `tidb` user account and enter the `/home/tidb` directory.
1. Log in to the Control Machine using the `tidb` user account and enter the `/home/tidb` directory. The corresponding relationship between the `tidb-ansible` branch and TiDB versions is as follows:

| tidb-ansible branch | TiDB version | Note |
| ------------------- | ------------ | ---- |
| release-2.0 | 2.0 version | This is the latest stable version. You can use it in production. |
| master | master version | This version includes the latest features with a daily update. |

2. Download the corresponding TiDB-Ansible version from the [TiDB-Ansible project](https://github.com/pingcap/tidb-ansible). The default folder name is `tidb-ansible`.
2. Download the corresponding TiDB-Ansible branch from the [TiDB-Ansible project](https://github.com/pingcap/tidb-ansible). The default folder name is `tidb-ansible`.

- Download the 2.0 GA version:
- Download the 2.0 version:

```bash
$ git clone -b release-2.0 https://github.com/pingcap/tidb-ansible.git
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