Delete broken links

SUMMARY.md

@@ -277,6 +277,7 @@
   * [Kubernetes1.12更新日志](appendix/kubernetes-1.12-changelog.md)
   * [Kubernetes1.13更新日志](appendix/kubernetes-1.13-changelog.md)
   * [Kubernetes1.14更新日志](appendix/kubernetes-1.14-changelog.md)
+  * [Kubernetes1.15更新日志](appendix/kubernetes-1.15-changelog.md)
 * [Kubernetes及云原生年度总结及展望](appendix/summary-and-outlook.md)
   * [Kubernetes与云原生2017年年终总结及2018年展望](appendix/kubernetes-and-cloud-native-summary-in-2017-and-outlook-for-2018.md)
   * [Kubernetes与云原生2018年年中总结及2019年展望](appendix/kubernetes-and-cloud-native-summary-in-2018-and-outlook-for-2019.md)

appendix/kubernetes-1.15-changelog.md

@@ -0,0 +1,17 @@
+# Kubernetes 1.15 更新日志
+
+北京时间 2019 年 6 月 20 日，Kubernetes 1.15 发布，这是 2019 年的第二个版本，距离上个版本发布刚好又是三个月的时间。该版本中最显著地改进包括：
+
+- CRD
+- SIG API Machinery 相关的改进
+- 集群生命周期的稳定性和可用性的改进，kubeadm 管理的证书轮换得到进一步加强，还有了自己的 logo
+
+![KubeAdmin Logo](https://d33wubrfki0l68.cloudfront.net/285b361256db9bb624c22ff9cd32557b4bc61aba/759c7/images/blog/2019-06-19-kubernetes-1-15-release-announcement/kubeadm-logo.png)
+
+详细的日志请访问：[Kubernetes 1.15: Extensibility and Continuous Improvement](https://kubernetes.io/blog/2019/06/19/kubernetes-1-15-release-announcement/)。
+
+## 参考
+
+- [Kubernetes 1.15: Extensibility and Continuous Improvement](https://kubernetes.io/blog/2019/06/19/kubernetes-1-15-release-announcement/)
+
+- [Kubernetes 1.15 Changelog](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.15.md)

book.json

@@ -56,7 +56,7 @@
             "size": "small"
         },
         "tbfed-pagefooter": {
-            "copyright": "<p><a href=https://jimmysong.io/about>私信我获取KubeCon China 2019门票折扣码和报名SOFAStack Cloud Native Workshop</a></p><p><a href=https://gw.alipayobjects.com/mdn/site_comm/afts/img/A*HA0uRIfs6UIAAAAAAAAAAABjARQnAQ data-lightbox=2fd927ee-fa64-4eca-8ed5-6bd72b573a3c>点击关注【云原生应用架构】公众号回复【加群】加入学习群</a> | <a href=https://jimmysong.io/jobs/>加入蚂蚁金服金融科技，构建金融级云原生基础设施</a></p>Copyright © <a href=https://jimmysong.io>jimmysong.io</a> 2017-2019",
+            "copyright": "<p><a href=https://gw.alipayobjects.com/mdn/site_comm/afts/img/A*HA0uRIfs6UIAAAAAAAAAAABjARQnAQ data-lightbox=2fd927ee-fa64-4eca-8ed5-6bd72b573a3c>点击关注【云原生应用架构】公众号回复【加群】加入学习群</a> | <a href=https://jimmysong.io/jobs/>加入蚂蚁金服金融科技，构建金融级云原生基础设施</a></p>Copyright © <a href=https://jimmysong.io>jimmysong.io</a> 2017-2019",
             "modify_label": " Updated at ",
             "modify_format": "YYYY-MM-DD HH:mm:ss"
         },

cloud-native/cloud-native-local-quick-start.md

@@ -352,5 +352,4 @@ rm -rf .vagrant
 - [Kubernetes handbook - jimmysong.io](https://jimmysong.io/kubernetes-handbook)
 - [duffqiu/centos-vagrant](https://github.com/duffqiu/centos-vagrant)
 - [coredns/deployment](https://github.com/coredns/deployment)
-- [Kubernetes 1.8 kube-proxy 开启 ipvs](https://mritd.me/2017/10/10/kube-proxy-use-ipvs-on-kubernetes-1.8/#%E4%B8%80%E7%8E%AF%E5%A2%83%E5%87%86%E5%A4%87)
+- [Vistio—使用Netflix的Vizceral可视化Istio service mesh](http://www.servicemesher.com/blog/vistio-visualize-your-istio-mesh-using-netflixs-vizceral/)
-- [Vistio—使用Netflix的Vizceral可视化Istio service mesh](https://servicemesher.github.io/blog/vistio-visualize-your-istio-mesh-using-netflixs-vizceral/)