1.0.8 release notes (#4278)

content/about/notes/1.0.8/index.md

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+---
+title: Istio 1.0.8
+publishdate: 2019-06-07
+icon: notes
+release: 1.0.8
+---
+
+This release includes several bug fixes and improvements to robustness.  This release note describes what's different between Istio 1.0.7 and Istio 1.0.8.
+
+{{< relnote >}}

content/blog/2019/announcing-1.0.8/index.md

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+---
+title: Announcing Istio 1.0.8
+description: Istio 1.0.8 patch release.
+publishdate: 2019-06-07
+attribution: The Istio Team
+release: 1.0.8
+---
+
+We're pleased to announce the availability of Istio 1.0.8. Please see below for what's changed.
+
+{{< relnote >}}

content/boilerplates/notes/1.0.8.md

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+## Bug fixes
+
+- Fix issue where Citadel could generate a new root CA if it cannot contact the Kubernetes API server, causing mutual TLS verification to incorrectly fail ([Issue 14512](https://github.com/istio/istio/issues/14512)).
+
+## Small enhancements
+
+- Update Citadel's default root CA certificate TTL from 1 year to 10 years.