feat: add flagger.app/Canary health check lua script and tests (#3902)

* add flagger.app/Canary health check lua script and tests

* add flagger.app/Canary health check lua script and tests, fix type

* add handle for flagger Initialized phase

* add handle for flagger Initialized phase and test

resource_customizations/flagger.app/Canary/health.lua

@@ -0,0 +1,31 @@
+sep = " --- "
+hs = {}
+if obj.status ~= nil then
+  message = ""
+  if tonumber(obj.status.canaryWeight) > 0 then            
+    message = "Canary Weight: " .. obj.status.canaryWeight .. " %"
+  end
+  for i, condition in ipairs(obj.status.conditions) do
+    if message ~= "" then
+      message = message .. sep
+    end
+    message = message .. condition.message
+  end          
+  if obj.status.phase == "Failed" then
+    hs.status = "Degraded"
+  elseif ( obj.status.phase == "Progressing" or 
+      obj.status.phase == "Finalising" or
+      obj.status.phase == "Promoting" ) then             
+    hs.status = "Progressing"
+  elseif ( obj.status.phase == "Succeeded" or 
+      obj.status.phase == "Initialized" ) then
+    hs.status = "Healthy"
+  else
+    hs.status = "Unknown"
+  end
+  hs.message = obj.status.phase .. sep .. message 
+  return hs
+end        
+hs.status = "Unknown"
+hs.message = "No status"
+return hs

resource_customizations/flagger.app/Canary/health_test.yaml

@@ -0,0 +1,25 @@
+tests:
+- healthStatus:
+    status: Progressing
+    message: "Progressing --- Canary Weight: 10 % --- New revision detected, progressing canary analysis."
+  inputPath: testdata/progressing.yaml
+- healthStatus:
+    status: Progressing
+    message: "Finalising --- Canary analysis completed, routing all traffic to primary."
+  inputPath: testdata/finalising.yaml
+- healthStatus:
+    status: Progressing
+    message: "Promoting --- Canary analysis completed, starting primary rolling update."
+  inputPath: testdata/promoting.yaml
+- healthStatus:
+    status: Degraded
+    message: "Failed --- Canary analysis failed, Deployment scaled to zero."
+  inputPath: testdata/degraded.yaml
+- healthStatus:
+    status: Healthy
+    message: "Succeeded --- Canary analysis completed successfully, promotion finished."
+  inputPath: testdata/succeeded.yaml  
+- healthStatus:
+    status: Healthy
+    message: "Initialized --- Installation successful."
+  inputPath: testdata/initialized.yaml  

resource_customizations/flagger.app/Canary/testdata/degraded.yaml

@@ -0,0 +1,29 @@
+apiVersion: flagger.app/v1beta1
+kind: Canary
+metadata:
+  generation: 1
+  labels:
+    app.kubernetes.io/instance: podinfo
+  name: podinfo
+  namespace: default
+  resourceVersion: "2268395"
+  selfLink: /apis/flagger.app/v1beta1/namespaces/default/canaries/podinfo
+  uid: 82df0136-0248-4a95-9c60-3184792614ea
+spec: {}
+status:
+  canaryWeight: 0
+  conditions:
+  - lastTransitionTime: "2020-07-03T19:13:47Z"
+    lastUpdateTime: "2020-07-03T19:13:47Z"
+    message: Canary analysis failed, Deployment scaled to zero.
+    reason: Failed
+    status: "False"
+    type: Promoted
+  failedChecks: 0
+  iterations: 0
+  lastAppliedSpec: 765c47b8f7
+  lastPromotedSpec: fc74df5fc
+  lastTransitionTime: "2020-07-03T19:13:47Z"
+  phase: Failed
+  trackedConfigs: {}
+

resource_customizations/flagger.app/Canary/testdata/finalising.yaml

@@ -0,0 +1,28 @@
+apiVersion: flagger.app/v1beta1
+kind: Canary
+metadata:
+  generation: 1
+  labels:
+    app.kubernetes.io/instance: podinfo
+  name: podinfo
+  namespace: default
+  resourceVersion: "2268395"
+  selfLink: /apis/flagger.app/v1beta1/namespaces/default/canaries/podinfo
+  uid: 82df0136-0248-4a95-9c60-3184792614ea
+spec: {}
+status:
+  canaryWeight: 0
+  conditions:
+  - lastTransitionTime: "2020-07-03T18:53:02Z"
+    lastUpdateTime: "2020-07-03T18:55:12Z"
+    message: Canary analysis completed, routing all traffic to primary.
+    reason: Finalising
+    status: Unknown
+    type: Promoted
+  failedChecks: 0
+  iterations: 0
+  lastAppliedSpec: fc74df5fc
+  lastPromotedSpec: 744b467645
+  lastTransitionTime: "2020-07-03T18:55:12Z"
+  phase: Finalising
+  trackedConfigs: {}

resource_customizations/flagger.app/Canary/testdata/initialized.yaml

@@ -0,0 +1,28 @@
+apiVersion: flagger.app/v1beta1
+kind: Canary
+metadata:
+  generation: 1
+  labels:
+    app.kubernetes.io/instance: podinfo
+  name: podinfo
+  namespace: default
+  resourceVersion: "2268395"
+  selfLink: /apis/flagger.app/v1beta1/namespaces/default/canaries/podinfo
+  uid: 82df0136-0248-4a95-9c60-3184792614ea
+spec: {}
+status:
+  canaryWeight: 0
+  conditions:
+  - lastTransitionTime: "2020-07-03T13:36:22Z"
+    lastUpdateTime: "2020-07-03T13:36:22Z"
+    message: Installation successful.
+    reason: Initialized
+    status: "True"
+    type: Promoted
+  failedChecks: 0
+  iterations: 0
+  lastAppliedSpec: 658bbf784f
+  lastPromotedSpec: 658bbf784f
+  lastTransitionTime: "2020-07-03T13:36:22Z"
+  phase: Initialized
+  trackedConfigs: {}

resource_customizations/flagger.app/Canary/testdata/progressing.yaml

@@ -0,0 +1,28 @@
+apiVersion: flagger.app/v1beta1
+kind: Canary
+metadata:
+  generation: 1
+  labels:
+    app.kubernetes.io/instance: podinfo
+  name: podinfo
+  namespace: default
+  resourceVersion: "2268395"
+  selfLink: /apis/flagger.app/v1beta1/namespaces/default/canaries/podinfo
+  uid: 82df0136-0248-4a95-9c60-3184792614ea
+spec: {}
+status:
+  canaryWeight: 10
+  conditions:
+  - lastTransitionTime: "2020-07-03T18:46:52Z"
+    lastUpdateTime: "2020-07-03T18:46:52Z"
+    message: New revision detected, progressing canary analysis.
+    reason: Progressing
+    status: Unknown
+    type: Promoted
+  failedChecks: 0
+  iterations: 0
+  lastAppliedSpec: 5c75b466fb
+  lastPromotedSpec: 658bbf784f
+  lastTransitionTime: "2020-07-03T18:47:02Z"
+  phase: Progressing
+  trackedConfigs: {}

resource_customizations/flagger.app/Canary/testdata/promoting.yaml

@@ -0,0 +1,28 @@
+apiVersion: flagger.app/v1beta1
+kind: Canary
+metadata:
+  generation: 1
+  labels:
+    app.kubernetes.io/instance: podinfo
+  name: podinfo
+  namespace: default
+  resourceVersion: "2268395"
+  selfLink: /apis/flagger.app/v1beta1/namespaces/default/canaries/podinfo
+  uid: 82df0136-0248-4a95-9c60-3184792614ea
+spec: {}
+status:
+  canaryWeight: 0
+  conditions:
+  - lastTransitionTime: "2020-07-03T18:53:02Z"
+    lastUpdateTime: "2020-07-03T18:55:02Z"
+    message: Canary analysis completed, starting primary rolling update.
+    reason: Promoting
+    status: Unknown
+    type: Promoted
+  failedChecks: 0
+  iterations: 0
+  lastAppliedSpec: fc74df5fc
+  lastPromotedSpec: 744b467645
+  lastTransitionTime: "2020-07-03T18:55:02Z"
+  phase: Promoting
+  trackedConfigs: {}

resource_customizations/flagger.app/Canary/testdata/succeeded.yaml

@@ -0,0 +1,28 @@
+apiVersion: flagger.app/v1beta1
+kind: Canary
+metadata:
+  generation: 1
+  labels:
+    app.kubernetes.io/instance: podinfo
+  name: podinfo
+  namespace: default
+  resourceVersion: "2268395"
+  selfLink: /apis/flagger.app/v1beta1/namespaces/default/canaries/podinfo
+  uid: 82df0136-0248-4a95-9c60-3184792614ea
+spec: {}
+status:
+  canaryWeight: 0
+  conditions:
+  - lastTransitionTime: "2020-07-03T13:36:22Z"
+    lastUpdateTime: "2020-07-03T13:36:22Z"
+    message: Canary analysis completed successfully, promotion finished.
+    reason: Succeeded
+    status: "True"
+    type: Promoted
+  failedChecks: 0
+  iterations: 0
+  lastAppliedSpec: 658bbf784f
+  lastPromotedSpec: 658bbf784f
+  lastTransitionTime: "2020-07-03T13:36:22Z"
+  phase: Succeeded
+  trackedConfigs: {}