pgrade Notes"><meta property=og:type content=website><meta property=og:description content="Important changes operators must understand before upgrading to Istio 1.2."><meta property=og:url content=/v1.4/news/releases/1.2.x/announcing-1.2/upgrade-notes/><meta property=og:image content=/v1.4/img/istio-whitelogo-bluebackground-framed.svg><meta property=og:image:alt content="Istio Logo"><meta property=og:image:width content=112><meta property=og:image:height content=150><meta property=og:site_name content=Isti