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k8s middleware cleanup, testcases, basic SRV (#181)

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* Removing unnecessary gitignore pattern

* Updating Makefile to run unittests for subpackages

* Adding Corefile validation to ignore overlapping zones

* Fixing SRV query handling

* Updating README.md now that SRV works

* Fixing debug message, adding code comment

* Clarifying implementation of zone normalization

* "Overlapping zones" is ill-defined. Reimplemented zone overlap/subzone
  checking to contain these functions in k8s middleware and provide
  better code comments explaining the normalization.

* Separate build verbosity from test verbosity

* Cleaning up comments to match repo code style

* Merging warning messages into single message
* Moving function docs to before function declaration

* Adding test cases for k8sclient connector

* Tests cover connector create and setting base url
* Fixed bugs in connector create and setting base url functions

* Updaing README to group and order development work

* Priority focused on achieving functional parity with SkyDNS.

* Adding work items to README and cleaning up formatting

* More README format cleaning

* List formating

* Refactoring k8s API call to allow dependency injection

* Add test cases for data parsing from k8s into dataobject structures

* URL is dependency-injected to allow replacement with a mock http
  server during test execution

* Adding more data validation for JSON parsing tests

* Adding test case for GetResourceList()

* Adding notes about SkyDNS embedded IP and port record names

* Marked test case implemented.

* Fixing formatting for example command.

* Fixing formatting

* Adding notes about Docker image building.

* Adding SkyDNS work item

* Updating TODO list

* Adding name template to Corefile to specify how k8s record names are assembled

* Adding template support for multi-segment zones

* Updating example CoreFile for k8s with template comment

* Misc whitespace cleanup

* Adding SkyDNS naming notes

* Adding namespace filtering to CoreFile config

* Updating example k8sCoreFile to specify namespaces

* Removing unused codepath

* Adding check for valid namespace

* More README TODO restructuring to focus effort

* Adding template validation while parsing CoreFile

* Record name template is considered invalid if it contains a symbol of the form ${bar} where the symbol
  "${bar}" is not an accepted template symbol.

* Refactoring generation of answer records

* Parse typeName out of query string
* Refactor answer record creation as operation over list of ServiceItems

* Moving k8s API caching into SkyDNS equivalency segment

* Adding function to assemble record names from template

* Warning: This commit may be broken. Syncing to get laptop code over to dev machine.

* More todo notes

* Adding comment describing sample test data.

* Update k8sCorefile

* Adding comment

* Adding filtering support for kubernetes "type"

* Required refactoring to support reuse of the StringInSlice function.

* Cleaning up formatting

* Adding note about SkyDNS supporting word "any".

* baseUrl -> baseURL

* Also removed debug statement from core/setup/kubernetes.go

* Fixing test breaking from Url -> URL naming changes

* Changing record name template language ${...} -> {...}

* Fix formatting with go fmt

* Updating all k8sclient data getters to return error value

* Adding error message to k8sclient data accessors

* Cleaning up setup for kubernetes

* Removed verbose nils in initial k8s middleware instance
* Set reasonable defaults if CoreFile has no parameters in the
kubernetes block. (k8s endpoint, and name template)

* Formatting cleanup -- go fmt
This commit is contained in:
Michael Richmond
2016-07-07 01:40:58 -07:00
committed by Miek Gieben
parent 558c34a23e
commit 289f53d386
19 changed files with 1610 additions and 304 deletions
Download Patch File Download Diff File Expand all files Collapse all files

129
middleware/kubernetes/nametemplate/nametemplate_test.go Normal file
View File

@@ -0,0 +1,129 @@
package nametemplate
import (
"fmt"
"strings"
"testing"
)
const (
zone = 0
namespace = 1
service = 2
)
// Map of format string :: expected locations of name symbols in the format.
// -1 value indicates that symbol does not exist in format.
var exampleTemplates = map[string][]int{
"{service}.{namespace}.{zone}": []int{2, 1, 0}, // service symbol expected @ position 0, namespace @ 1, zone @ 2
"{namespace}.{zone}": []int{1, 0, -1},
"": []int{-1, -1, -1},
}
func TestSetTemplate(t *testing.T) {
fmt.Printf("\n")
for s, expectedValue := range exampleTemplates {
n := new(NameTemplate)
n.SetTemplate(s)
// check the indexes resulting from calling SetTemplate() against expectedValues
if expectedValue[zone] != -1 {
if n.Element["zone"] != expectedValue[zone] {
t.Errorf("Expected zone at index '%v', instead found at index '%v' for format string '%v'", expectedValue[zone], n.Element["zone"], s)
}
}
}
}
func TestGetServiceFromSegmentArray(t *testing.T) {
var (
n *NameTemplate
formatString string
queryString string
splitQuery []string
expectedService string
actualService string
)
// Case where template contains {service}
n = new(NameTemplate)
formatString = "{service}.{namespace}.{zone}"
n.SetTemplate(formatString)
queryString = "myservice.mynamespace.coredns"
splitQuery = strings.Split(queryString, ".")
expectedService = "myservice"
actualService = n.GetServiceFromSegmentArray(splitQuery)
if actualService != expectedService {
t.Errorf("Expected service name '%v', instead got service name '%v' for query string '%v' and format '%v'", expectedService, actualService, queryString, formatString)
}
// Case where template does not contain {service}
n = new(NameTemplate)
formatString = "{namespace}.{zone}"
n.SetTemplate(formatString)
queryString = "mynamespace.coredns"
splitQuery = strings.Split(queryString, ".")
expectedService = ""
actualService = n.GetServiceFromSegmentArray(splitQuery)
if actualService != expectedService {
t.Errorf("Expected service name '%v', instead got service name '%v' for query string '%v' and format '%v'", expectedService, actualService, queryString, formatString)
}
}
func TestGetZoneFromSegmentArray(t *testing.T) {
var (
n *NameTemplate
formatString string
queryString string
splitQuery []string
expectedZone string
actualZone string
)
// Case where template contains {zone}
n = new(NameTemplate)
formatString = "{service}.{namespace}.{zone}"
n.SetTemplate(formatString)
queryString = "myservice.mynamespace.coredns"
splitQuery = strings.Split(queryString, ".")
expectedZone = "coredns"
actualZone = n.GetZoneFromSegmentArray(splitQuery)
if actualZone != expectedZone {
t.Errorf("Expected zone name '%v', instead got zone name '%v' for query string '%v' and format '%v'", expectedZone, actualZone, queryString, formatString)
}
// Case where template does not contain {zone}
n = new(NameTemplate)
formatString = "{service}.{namespace}"
n.SetTemplate(formatString)
queryString = "mynamespace.coredns"
splitQuery = strings.Split(queryString, ".")
expectedZone = ""
actualZone = n.GetZoneFromSegmentArray(splitQuery)
if actualZone != expectedZone {
t.Errorf("Expected zone name '%v', instead got zone name '%v' for query string '%v' and format '%v'", expectedZone, actualZone, queryString, formatString)
}
// Case where zone is multiple segments
n = new(NameTemplate)
formatString = "{service}.{namespace}.{zone}"
n.SetTemplate(formatString)
queryString = "myservice.mynamespace.coredns.cluster.local"
splitQuery = strings.Split(queryString, ".")
expectedZone = "coredns.cluster.local"
actualZone = n.GetZoneFromSegmentArray(splitQuery)
if actualZone != expectedZone {
t.Errorf("Expected zone name '%v', instead got zone name '%v' for query string '%v' and format '%v'", expectedZone, actualZone, queryString, formatString)
}
}