An Elasticsearch Migration Tool

Elasticsearch cross version data migration.

Features:

Cross version migration supported
Overwrite index name
Copy index settings and mapping
Support http basic auth
Support dump index to local file
Support loading index from local file
Support http proxy
Support sliced scroll ( elasticsearch 5.0 +)
Support run in background
Generate testing data by randomize the source document id
Support rename filed name
Support unify document type name
Support specify which _source fields to return from source
Support specify query string query to filter the data source
Support rename source fields while do bulk indexing

Example:

copy index index_name from 192.168.1.x to 192.168.1.y:9200

./bin/esm  -s http://192.168.1.x:9200   -d http://192.168.1.y:9200 -x index_name  -w=5 -b=10 -c 10000

copy index src_index from 192.168.1.x to 192.168.1.y:9200 and save with dest_index

./bin/esm -s http://localhost:9200 -d http://localhost:9200 -x src_index -y dest_index -w=5 -b=100

support Basic-Auth

./bin/esm -s http://localhost:9200 -x "src_index" -y "dest_index"  -d http://localhost:9201 -n admin:111111

copy settings and override shard size

./bin/esm -s http://localhost:9200 -x "src_index" -y "dest_index"  -d http://localhost:9201 -m admin:111111 -c 10000 --shards=50  --copy_settings

copy settings and mapping, recreate target index, add query to source fetch, refresh after migration

./bin/esm -s http://localhost:9200 -x "src_index" -q=query:phone -y "dest_index"  -d http://localhost:9201  -c 10000 --shards=5  --copy_settings --copy_mappings --force  --refresh

dump elasticsearch documents into local file

./bin/esm -s http://localhost:9200 -x "src_index"  -m admin:111111 -c 5000 -q=query:mixer  --refresh -o=dump.bin

loading data from dump files, bulk insert to another es instance

./bin/esm -d http://localhost:9200 -y "dest_index"   -n admin:111111 -c 5000 -b 5 --refresh -i=dump.bin

support proxy

 ./bin/esm -d http://123345.ap-northeast-1.aws.found.io:9200 -y "dest_index"   -n admin:111111  -c 5000 -b 1 --refresh  -i dump.bin  --dest_proxy=http://127.0.0.1:9743

use sliced scroll(only available in elasticsearch v5) to speed scroll, and update shard number

 ./bin/esm -s=http://192.168.3.206:9200 -d=http://localhost:9200 -n=elastic:changeme -f --copy_settings --copy_mappings -x=bestbuykaggle  --sliced_scroll_size=5 --shards=50 --refresh

migrate 5.x to 6.x and unify all the types to doc

./esm -s http://source_es:9200 -x "source_index*"  -u "doc" -w 10 -b 10 - -t "10m" -d https://target_es:9200 -m elastic:passwd -n elastic:passwd -c 5000

to migrate version 7.x and you may need to rename _type to _doc

./esm -s http://localhost:9201 -x "source" -y "target"  -d https://localhost:9200 --rename="_type:type,age:myage"  -u"_doc"

filter migration with range query

./esm -s https://192.168.3.98:9200 -m elastic:password -o json.out -x kibana_sample_data_ecommerce -q "order_date:[2020-02-01T21:59:02+00:00 TO 2020-03-01T21:59:02+00:00]"

generate testing data, if input.json contains 10 documents, the follow command will ingest 100 documents, good for testing

./bin/esm -i input.json -d  http://localhost:9201 -y target-index1  --regenerate_id  --repeat_times=10

select source fields

 ./bin/esm -s http://localhost:9201 -x my_index -o dump.json --fields=author,title

rename fields while do bulk indexing

./bin/esm -i dump.json -d  http://localhost:9201 -y target-index41  --rename=title:newtitle

Download

https://github.com/medcl/elasticsearch-dump/releases

Compile:

if download version is not fill you environment,you may try to compile it yourself. go required.

make build

go version >= 1.7

Options

Usage:
  esm [OPTIONS]

Application Options:
  -s, --source=                    source elasticsearch instance, ie: http://localhost:9200
  -q, --query=                     query against source elasticsearch instance, filter data before migrate, ie: name:medcl
  -d, --dest=                      destination elasticsearch instance, ie: http://localhost:9201
  -m, --source_auth=               basic auth of source elasticsearch instance, ie: user:pass
  -n, --dest_auth=                 basic auth of target elasticsearch instance, ie: user:pass
  -c, --count=                     number of documents at a time: ie "size" in the scroll request (10000)
  -w, --workers=                   concurrency number for bulk workers (1)
  -b, --bulk_size=                 bulk size in MB (5)
  -t, --time=                      scroll time (1m)
      --sliced_scroll_size=        size of sliced scroll, to make it work, the size should be > 1 (1)
  -f, --force                      delete destination index before copying
  -a, --all                        copy indexes starting with . and _
      --copy_settings              copy index settings from source
      --copy_mappings              copy index mappings from source
      --shards=                    set a number of shards on newly created indexes
  -x, --src_indexes=               indexes name to copy,support regex and comma separated list (_all)
  -y, --dest_index=                indexes name to save, allow only one indexname, original indexname will be used if not specified
  -u, --type_override=             override type name
      --green                      wait for both hosts cluster status to be green before dump. otherwise yellow is okay
  -v, --log=                       setting log level,options:trace,debug,info,warn,error (INFO)
  -o, --output_file=               output documents of source index into local file
  -i, --input_file=                indexing from local dump file
      --input_file_type=           the data type of input file, options: dump, json_line, json_array, log_line (dump)
      --source_proxy=              set proxy to source http connections, ie: http://127.0.0.1:8080
      --dest_proxy=                set proxy to target http connections, ie: http://127.0.0.1:8080
      --refresh                    refresh after migration finished
      --fields=                    output fields, comma separated, ie: col1,col2,col3,...
      --rename=                    rename source fields while do bulk indexing, comma separated, ie: _type:type, name:myname
      --repeat_times=              repeat the data from source N times to dest output, use align with parameter regenerate_id to amplify the data size
  -r, --regenerate_id              regenerate id for documents, this will override the exist document id in data source

Help Options:
  -h, --help                       Show this help message

FAQ

Scroll ID too long, update elasticsearch.yml on source cluster.

http.max_header_size: 16k
http.max_initial_line_length: 8k

Versions

From	To
1.x	1.x
1.x	2.x
1.x	5.0
1.x	6.0
1.x	7.0
2.x	1.x
2.x	2.x
2.x	5.0
2.x	6.0
2.x	7.0
5.0	1.x
5.0	2.x
5.0	5.0
5.x	6.x
5.x	7.x
6.0	1.x
6.0	2.x
6.0	5.0
6.x	6.x
6.x	7.x
7.0	1.x
7.0	2.x
7.0	5.0
7.x	6.x
7.x	7.x

wuyeguo / esm