Followed the instructions in the blog series to add Squid.
We need an index template for Squid so that it interprets the timestamp field as a timestamp. I did not see this in the blog series, but I might have missed.
PUT _template/values
{
"template": "squid_index*",
"mappings": {
"values_doc": {
"_timestamp": {
"enabled": true
},
"properties": {
"timestamp": {
"type": "date",
"format": "epoch_millis"
}
}
}
}
}