Elasticsearch cluster unhealthy (RED) (triggered a day ago)
The Elasticsearch cluster state is RED which means shards are unassigned. This usually indicates a crashed and corrupt cluster and needs to be investigated. Graylog will write into the local disk journal. Read how to fix this in the Elasticsearch setup documentation.
index.number_of_shards: 1
index.number_of_replicas: 0
node.local: true
discovery.zen.ping.multicast.enabled: false
discovery.zen.minimum_master_nodes: 1
node.max_local_storage_nodes: 1