indices.getUpgrade

edit
client.indices.getUpgrade({
  index: string | string[],
  ignore_unavailable: boolean,
  allow_no_indices: boolean,
  expand_wildcards: 'open' | 'closed' | 'none' | 'all'
})

Reference

index

string | string[] - A comma-separated list of index names; use _all or empty string to perform the operation on all indices

ignore_unavailable or ignoreUnavailable

boolean - Whether specified concrete indices should be ignored when unavailable (missing or closed)

allow_no_indices or allowNoIndices

boolean - Whether to ignore if a wildcard indices expression resolves into no concrete indices. (This includes _all string or when no indices have been specified)

expand_wildcards or expandWildcards

'open' | 'closed' | 'none' | 'all' - Whether to expand wildcard expression to concrete indices that are open, closed or both.
Default: open