---
title: Elasticsearch snapshot實作
tags: Elasticsearch
description: View the slide with "Slide Mode".
---

# Elasticsearch snapshot實作 :moyai:

## 實作
[Snapshot and restore](https://www.elastic.co/guide/en/elasticsearch/reference/7.x/snapshot-restore.html)

## 1. [Register a snapshot repository](https://www.elastic.co/guide/en/elasticsearch/reference/7.x/snapshots-register-repository.html)
### 1.1 ~~local repository~~
#### 1.1.1 建立本地 repository

$ mkdir /tmp/es_repo
$ chown -R elasticsearch:elasticsearch /tmp/es_repo

#### 1.1.2 改`elasticsearch.yml`

path.repo: ["/tmp/es_repo"]

#### 1.1.3 對 clsuter 設定

curl -X PUT "localhost:9200/_snapshot/my_backup?pretty" -H 'Content-Type: application/json' -d'
{
  "type": "fs",
  "settings": {
    "location": "/tmp/es_repo"
  }
}
'

>[name=昱齊]會出錯~ 一定要shared filesystem

### 1.2 google cloud storage
#### 1.2.1 安裝套件並重啟服務

$ /usr/share/elasticsearch/bin/elasticsearch-plugin install repository-gcs
$ systemctl restart elasticsearch

#### 1.2.2 [gcs 官方教學](https://www.elastic.co/guide/en/elasticsearch/plugins/7.3/repository-gcs-usage.html)
1. 建立bucket -> 一個儲存單位
2. 建立服務帳戶，並取得json 金鑰

#### 1.2.3 將json金鑰放入`elasticsearch-keystore`，並重啟服務

$ /usr/share/elasticsearch/bin/elasticsearch-keystore add-file gcs.client.default.credentials_file /etc/elasticsearch/金鑰檔案.json

這邊只需要調整金鑰檔名即可
#### 1.2.4 登記 repository

curl -u elastic -X PUT "localhost:9200/_snapshot/my_backup?pretty" -H 'Content-Type: application/json' -d'
{
  "type": "gcs",
  "settings": {
    "bucket": "if_efk",
    "client": "default"
  }
}
'

- 可調整的：my_backup、bucket後面接的是gcs上面設定的名稱

## 2. 建立快照

curl -u elastic -X PUT "localhost:9200/_snapshot/my_backup/snapshot_1?wait_for_completion=true&pretty" -H 'Content-Type: application/json' -d'
{
  "indices": "test,.security-7",
  "ignore_unavailable": true,
  "include_global_state": false,
  "metadata": {
    "taken_by": "yq",
    "taken_because": "backup before upgrading"
  }
}
'

## 3. 還原快照
### 3.1 不設參數

curl -u elastic -X POST "localhost:9200/_snapshot/my_backup/snapshot_1/_restore?pretty"

### 3.2 設參數

curl -u elastic -X POST "localhost:9200/_snapshot/my_backup/snapshot_1/_restore?pretty" -H 'Content-Type: application/json' -d'
{
  "indices": "test",
  "include_global_state": true
}
'

> [name=昱齊]還有bug，暫時無法成功