v0.23.0

Kubernetes 1.12!: 🚀

This release introduces final 1.12 support (v1.12.1 is included). The most interesting change w/ 1.12 is the change from kube-dns to CoreDNS. See here for an overview of CoreDNS:

https://kubernetes.io/docs/tasks/administer-cluster/coredns/

Please consider this a 1st class part of your 1.12 cluster, including upgrading from 1.11 clusters w/ kube-dns. Let us know if you observe any behavioral regressions!

Also, 1.12 is k8s-conformance certified for acs-engine!

https://github.com/cncf/k8s-conformance/tree/master/v1.12/acs-engine

FEATURES: 🌈

• Kubernetes 1.12.1 (PR #3963 @mboersma)
• Kubernetes 1.9.11 (PR #3934 @mboersma)
• Default Kubernetes release (if not user-provided) is now 1.10! (PR #3946 @jackfrancis)
• Add availability zone support for masters (PR #3864 @ritazh)
• Update azure-sdk-for-go to v21.0.0 (PR #3884 @mboersma)
• Add shortcuts for some common command-line arguments (PR #3904 @mboersma)
• Add zip package to VHD image (PR #3912 @mboersma)
• ip-masq-agent to enforce IP non-masquerade (PR #3916 @jackfrancis)
  • See https://github.com/kubernetes-incubator/ip-masq-agent#rationale
• Accelerated networking for Windows (PR #3908 @CecileRobertMichon)
• Enable cgroups needed by kubelet's --system-reserved and --kube-reserved (PRs #3915 #3970 @seanknox @jackfrancis)
• Update Kubernetes node-labels to 1.6+ standard (PR #3980 @lachie83)

BUGS FIXED: 🐞

• Enforce windows password complexity requirements in acs-engine client (PR #3854 @vpatelsj)
• Perform JSON escaping of strings (PR #3919 @tariq1890)
• removed duplication of shellQuote function and added test cases. (PR #3927 @tariq1890)
• Fix accidentally shadowed variable in upgrade cluster. (PR #3943 @mboersma)
• Cleanup Packer directory after VHD build (PRs #3964 #3965 #3967 @CecileRobertMichon)
• Don't set default distro when OSType is Windows (PR #3950 @urld)

DEV IMPROVEMENTS/CHORES: 🔧

• Optimizing template conditional blocks in K8s templates (PR #3871 @tariq1890)
• Replace deprecated Azure SDK method calls (PR #3881 @tariq1890)
• Adding test case for Generate Cluster ID (PR #3879 @tariq1890)
• Handle iterated subtest execution correctly (PR #3894 @tariq1890)
• Extracting property values to make ARM output variables accessible (PR #3877 @tariq1890)
• Fixing unreported gosimple lints (PR #3901 @tariq1890)
• Stop ginkgo tests after first failure (PR #3922 @mboersma)
• Simplify some upgrader version cases (PR #3924 @mboersma)
• Use echo -n to skip adding newline to external command output (PR #3940 @vharsh)
• Migrating Get Addon By Name and Get Container Index By Name methods (PR #3938 @tariq1890)
• change default value for osImage (PR #3944 @CecileRobertMichon)
• Move utility methods to the helper package (PR #3948 @tariq1890)
• Update go-dev tools image for go 1.11.1 (PR #3947 @mboersma)
• Refactor VM prefix to template functions (PR #3925 @CecileRobertMichon)
• Migrating cloud spec config to api package (PR #3953 @tariq1890)
• Fix urls to gofi.sh (PR #3973 @oyvindh)
• Strengthen unit tests for cluster ID (PRs #3972 #3978 @CecileRobertMichon @tariq1890)
• Optimize customData payload by removing comments (PR #3971 @jackfrancis)
• Docs updates!
  • Update docs for AZ (PR #3886 @ritazh)
  • Adding windowsAgent apimodel parameters (PR #3939 @PatrickLang)
• CI/E2E maintenance/improvements!
  • Add acs-engine deploy e2e test (PR #3777 @serbrech)
  • Windows dns connectivity - e2e tests (PR #3760 @jsturtevant)
  • Change 'windowsVersion' to 'imageVersion' in docs (PR #3928 @Azaradel)
  • Retry kubectl delete job (PR #3981 @jackfrancis)
  • k8s component tests should happen before api tests (PR #3991 @jackfrancis)