backup ElasticSearch

backup.js

# Backup ES

## Step 1: Create new index for index you want to backup

PUT /backup_test
```json
{
  "mappings": {
    "faq": {
      "properties": {
        "category": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "id": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "params": {
          "type": "object"
        },
        "r": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          },
          "analyzer": "keyword"
        },
        "intent": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          },
          "analyzer": "keyword"
        },
        "language": {
          "type": "text",
          "analyzer": "keyword"
        }
      }
    }
  }
}
```

## Step 2: Copy old index to new index

POST /_reindex
```json
{
  "source": {
    "index": "test"
  },
  "dest": {
    "index": "backup_test"
  }
}
```

## Step 3: Delete old index

DELETE /test

## Step 4: Create again old index with new mapping data

PUT /test
```json
{
  "mappings": {
    "faq": {
      "properties": {
        "category": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "id": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "params": {
          "type": "object"
        },
        "r": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          },
          "analyzer": "keyword"
        },
        "intent": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          },
          "analyzer": "keyword"
        },
        "language": {
          "type": "text",
          "analyzer": "keyword"
        }
      }
    }
  }
}
```

## Step 5: Copy new index back to old index => done, you can choose to keep backup or delete it

POST /_reindex
```json
{
  "source": {
    "index": "backup_test"
  },
  "dest": {
    "index": "test"
  }
}
```