You can create a alias for multiple collection.
Below is the way you create an alias for multiple collection.
http://localhost:8983/solr/admin/collections?action=CREATEALIAS&name=testalias&collections=collection1,collection2&wt=xml
Please refer the solr documentation for more details.
Collection Alias
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…