Require min version of Kubernetes (#4860)

* Require minimum version of Kubernetes

* Remove checksums for kubernetes version 1.12

* Add kube_version to precheck output and add min required version to README

* Fix merge

* Fix defaults

* Fix typo in precheck

README.md

@@ -132,7 +132,7 @@ Note: The list of validated [docker versions](https://github.com/kubernetes/kube
 
 Requirements
 ------------
-
+-   ** Minimum required version of Kubernetes is v1.13**
 -   **Ansible v2.7.8 (or newer) and python-netaddr is installed on the machine
     that will run Ansible commands**
 -   **Jinja 2.9 (or newer) is required to run the Ansible Playbooks**

roles/download/defaults/main.yml

@@ -98,13 +98,6 @@ hyperkube_checksums:
     v1.13.2: a981aa0950e86a4380526a3a53f465ce013b95f6d9d8139a9df4a6406b67316f
     v1.13.1: 1880ba36aae85474bcea42be0bf37dfa70eb23dd71eb8e956c474e004343f5a4
     v1.13.0: 41c05bf9b0272322fc947760030c21907c21dd8a88576b20cdb110003e818b8f
-    v1.12.6: ba47da779e716f87689cfe097252e5a806ada03c932216dafea2aca27e3f7d33
-    v1.12.5: 5308182b6d8b546eb61737a1f962b4283c67e25fa205016f8cb7fcb3b51b8f39
-    v1.12.4: 8e6ee8d10d8d13b453315811ed1ab60b0092f9168c933712fd176085cf080bb0
-    v1.12.3: 303b47eced6b4f8a8e56d0c01c23d17f42ee7527b1537b1243445bb54606fb61
-    v1.12.2: 4e4fff764bef10b092d17be501eb63d2f8a72ce3c44e17155fe0cb0315384a20
-    v1.12.1: 4cc7648c160c6dd57953034e137664072a5de902efc0104062618fbc6e26a304
-    v1.12.0: f061def3fedc3873447998f6a16ed012ba4800b693f4646baac2acb7cd919302
   arm64:
     v1.14.3: f29211d668cbcf1aa415dfa64aad95ffc53b5410482a23cddb680caec4e907a3
     v1.14.2: 959fb7d9c17fc8f7cb1a69920aaf08aefd62c0fbf6b5bdc46250f147ea6a5cd4
@@ -118,13 +111,6 @@ hyperkube_checksums:
     v1.13.2: 7f2c2b0c6dcc81102a89fa41957db214416fc8a0cfae664fc0e150a7d3ad337b
     v1.13.1: 66205d99ec93090c6d814ab1de7c38cd84257d3dcf3a957618fad5878caea13d
     v1.13.0: 4391ea0d8d472c1737f1ce945756bf2a11395c708824c780d1a44fbddf031e59
-    v1.12.6: 29036599f173ceeab2c72dff589aa02d5a55b45143c70de7c08cdea75a282bc2
-    v1.12.5: 0b953f2d564d2f9298f3fc3ad6279cf4b18c1c967ebd2d542b79dda54e3aa27a
-    v1.12.4: f66fc2c945c757d6b34cdd654c3d951f74f366026f9af0dd10eb64e482584811
-    v1.12.3: a6142356fdbc8915cb474437355f809d987f6b983e21081dc3e18ea86c76bf85
-    v1.12.2: 81e6fdd4e3ed8687a37d9b1830aa43d508fb7d5061c81cb2576a17077382b614
-    v1.12.1: 6863440b5516c94f48a3a23bf325a007af09f5412f335444e204bc4b09fbad2a
-    v1.12.0: 3eb06e2344ea5e4988fdda168627319e7b10665f7f9fc9d96c477ccb39d0b061
   amd64:
     v1.14.3: 6c6cb5c118b2129ba4e56697f42567be3587eb636a477cd342b69f87b3b049d1
     v1.14.2: 05546057f2053e085fa8387ab82581c95fe4195cd783408ccbb4fc3487c50176
@@ -138,13 +124,6 @@ hyperkube_checksums:
     v1.13.2: f159b587ec80ad03bf3b9bb09de5d64b773d01b0e34f2a4f1c816879c56aae6d
     v1.13.1: f64c4328d3853f3e5680e7d296b0f3ed25e67ff98321867309edea100ebb4fd7
     v1.13.0: 754f1baae5dc2ba29afc66e1f5d3b676ee59cd5c40ccce813092408d53bde3d9
-    v1.12.6: eb7bd0c21977bca7071c65fa0ef60d5e09c9e9a16c4fd8435be5bd7f5b0d1221
-    v1.12.5: f8b651816b2caa33e8b25a666e5c370e9786356d59f89579bba772f28370ed00
-    v1.12.4: a4697d8f3791f0408fcdb97b3de187e47d7b39a63332c75f68f95e25f4891cc9
-    v1.12.3: 600aad3f0d016716abd85931239806193ffbe95f2edfdcea11532d518ae5cdb1
-    v1.12.2: 566dfed398c20c9944f8999d6370cb584cb8c228b3c5881137b6b3d9306e4b06
-    v1.12.1: 4aa23cfb2fc2e2e4d0cbe0d83a648c38e4baabd6c66f5cdbbb40cbc7582fdc74
-    v1.12.0: f80336201f3152a5307c01f8a7206847398dde15c69b3d20c76a7d9520b60daf
 kubeadm_checksums:
   arm:
     v1.14.3: 270b8c346aeaa309d11d65695c4a90f6bff5b1ea14bdec3c417ca2dfb3de0db3
@@ -159,13 +138,6 @@ kubeadm_checksums:
     v1.13.2: 5bf5d766050245abde802fdea77a85586ce1477e538bcc4fa618bba854c18980
     v1.13.1: c92bc8672a31158e33489ec9285d0a5546cb5be5bdfdb8cd424fff08439fff9c
     v1.13.0: a35e9248fccddb3f2381fd3695c889a576e9ecc63f2b3c9bb0e8daf0308427ef
-    v1.12.6: 12c1bd47bef9ba6a821ee5663714b8330b6d3dad7f0f41a352c3c3959405bc3e
-    v1.12.5: 1f995888976b9d9fe7621a5a77b2ed0c7cf3cd5163dbd621071c6ff99467325c
-    v1.12.4: 9d33673798507959b888f1f82b418e0239c2e9588492b3d7ffee979dbd136c4a
-    v1.12.3: e0e4aa97bb11d92da1785fe4e6c9333a995fd583f5878bcd648bd237723a06d2
-    v1.12.2: 982013a9a3163e64e3cee628d9dbc9550a16e4fdf90e25ad663de85cdb4a5de3
-    v1.12.1: f3c2148d957882fc032c4a3a11d77a8d1f6ab0e77e2532f1ee4f4fe9a599fc3d
-    v1.12.0: bdea48f21f9c55628f9449529bf0ebe9f1ad6712e0b55ad2506236b8203fc240
   arm64:
     v1.14.3: 8edcc07c65f81eea3fc47cd237dd6560c6907c5e0ca52d71eab53ca1164e7d01
     v1.14.2: bff0712b87796509129aa802ad3ac25b8cc83af01762b22b4dcca8dbdb26b520
@@ -179,13 +151,6 @@ kubeadm_checksums:
     v1.13.2: 08279a3bfeff8c4f6768d6fd92ceff8276a555f9e81bf9d541112fc8eb29963e
     v1.13.1: 0f5c2c8a1ffe235785c0a38c9a6530d3d9e67b00e9a07c9d5dca4c36ede2e078
     v1.13.0: efc2669952b05161e181f0805bb0647308891259528a4868e69f4b1b68c70489
-    v1.12.6: 2552b6b623c0c390d495e1fcfbecbebb2ca8853bce4011ce9b9dc3f1763a9b2b
-    v1.12.5: f8b212c4a63d28e800a312c3785a62650c3c5bb26326e414d59e1a548d68fbae
-    v1.12.4: 929ec24bee4d7645a18b157d6987554a131fde8d1efb704391bdfe81e6dcf1d4
-    v1.12.3: e9e54a553447391de59a21d3da5b58d61d3431877de194434b4ae6544594009e
-    v1.12.2: 2230dfabd76a4d0888facccb3ec3c802b658e835aaa817cbce2310d3f8533fc4
-    v1.12.1: 226b9026ef913e98c2966503fde6973e3e33b5621e9c240667093dcb786bd811
-    v1.12.0: c0d4a75615791e6880d051d6d601eb703e0ac3ec64f94f156b76351368b2eb9c
   amd64:
     v1.14.3: 026700dfff3c78be1295417e96d882136e5e1f095eb843e6575e57ef9930b5d3
     v1.14.2: 77510f61352bb6e537e70730b670627963f2c314fbd36a644b0c435b97e9705a
@@ -199,13 +164,6 @@ kubeadm_checksums:
     v1.13.2: 7cb0ce57c1e6e2d85e05de3780a2f35a191fe93f89cfc5816b424efcf39834b9
     v1.13.1: 438173bfa0b7014ecae994c5b9e1f27e1328ab971a3fdb06a393a8095a176ba0
     v1.13.0: f5366206416dc4cfc840a7add2289957b56ccc479cc1b74f7397a4df995d6b06
-    v1.12.6: 9048031930be9cb0506940c04f6ce67408d9caa9384b32d65d7aa5b6f1ad58ec
-    v1.12.5: d61730b3deb4d9825af0cc1e452a4be2292400507128279770c39669f6599af9
-    v1.12.4: 674ad5892ff2403f492c9042c3cea3fa0bfa3acf95bc7d1777c3645f0ddf64d7
-    v1.12.3: c675aa3be82754b3f8dfdde2a1526a72986713312d46d898e65cb564c6aa8ad4
-    v1.12.2: 51bc4bfd1d934a27245111c0ad1f793d5147ed15389415a1509502f23fcfa642
-    v1.12.1: 5d95efd65aad398d85a9802799f36410ae7a95f9cbe73c8b10d2213c10a6d7be
-    v1.12.0: 463fb058b7fa2591fb01f29f2451b054f6cbaa0f8a20394b4a4eb5d68473176f
 
 etcd_binary_checksums:
   # Etcd does not have arm32 builds at the moment, having some dummy value is

roles/kubernetes/preinstall/tasks/0020-verify-settings.yml

@@ -32,6 +32,12 @@
   when: cloud_provider is defined and cloud_provider == 'azure'
   ignore_errors: "{{ ignore_assert_errors }}"
 
+- name: Stop if unsupported version of Kubernetes
+  assert:
+    that: kube_version is version(kube_version_min_required, '>=')
+    msg: "The current release of Kubespray only support newer vesion of Kubernetes than {{ kube_version_min_required }} - You are trying to apply {{ kube_version }}"
+  ignore_errors: "{{ ignore_assert_errors }}"
+
 # simplify this items-list when   https://github.com/ansible/ansible/issues/15753  is resolved
 - name: "Stop if known booleans are set as strings (Use JSON format on CLI: -e \"{'key': true }\")"
   assert:

roles/kubespray-defaults/defaults/main.yaml

@@ -14,6 +14,9 @@ disable_swap: true
 ## Change this to use another Kubernetes version, e.g. a current beta release
 kube_version: v1.14.3
 
+## The minimum version working
+kube_version_min_required: v1.13.0
+
 ## Kube Proxy mode One of ['iptables','ipvs']
 kube_proxy_mode: ipvs