es-retention-graphs/query.py

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import hashlib
from elasticsearch import Elasticsearch
def remove_prefix(text, prefix):
return text[text.startswith(prefix) and len(prefix):]
def hash_string(text):
return hashlib.sha256(text.encode('utf-8')).hexdigest()
class ESQueryPeers():
def __init__(self, host='localhost', port=9200, timeout=1200):
self.client = Elasticsearch(
[{ 'host': host,
'port': port, }],
timeout=timeout,
retry_on_timeout=True
)
self.cluster = self.client.info().get('cluster_name')
def get_indices(self, pattern='logstash-*'):
return self.client.indices.get(index=pattern).keys()
def get_peers(self, index, field='peer_id', max_query=10000):
body = {
'size': 0, # Don't return actual values
'aggs': { 'peers': {
'terms': {
'field': field,
'size': 10000,
},
}, },
}
# Query
resp = self.client.search(index=index, body=body)
aggs = resp.get('aggregations')
# Collect results as list of dicts
rval = []
for bucket in aggs['peers']['buckets']:
rval.append({
'Date': remove_prefix(index, 'logstash-'),
'Peer': hash_string(bucket['key']),
'Count': bucket['doc_count'],
})
return rval