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Chris O'Haver 2019-04-08 16:21:40 -04:00 • committed by GitHub
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258
kubernetes/migration/versions.go Normal file
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package migration
import (
"github.com/coredns/deployment/kubernetes/migration/corefile"
)
type plugin struct {
status string
replacedBy string
additional string
action pluginActionFn
options map[string]option
}
type option struct {
status string
replacedBy string
additional string
action optionActionFn
}
type release struct {
k8sRelease string
nextVersion string
dockerImageID string
plugins map[string]plugin
// defaultConf hold the default Corefile template packaged with the corresponding k8sRelease.
// Wildcards are used for fuzzy matching:
// "*" matches exactly one token
// "***" matches 0 all remaining tokens on the line
// Order of server blocks, plugins, and options does not matter.
// Order of arguments does matter.
defaultConf string
}
type pluginActionFn func(*corefile.Plugin) (*corefile.Plugin, error)
type optionActionFn func(*corefile.Option) (*corefile.Option, error)
func removePlugin(*corefile.Plugin) (*corefile.Plugin, error) { return nil, nil }
func removeOption(*corefile.Option) (*corefile.Option, error) { return nil, nil }
func renamePlugin(p *corefile.Plugin, to string) (*corefile.Plugin, error) {
p.Name = to
return p, nil
}
var Versions = map[string]release{
"1.5.0": {
dockerImageID: "7987f0908caf",
plugins: map[string]plugin{
"errors": {
options: map[string]option{
"consolidate": {},
},
},
"health": {},
"autopath": {},
"kubernetes": {
options: map[string]option{
"resyncperiod": {
status: deprecated,
action: removeOption,
},
"endpoint": {},
"tls": {},
"kubeconfig": {},
"namespaces": {},
"labels": {},
"pods": {},
"endpoint_pod_names": {},
"ttl": {},
"noendpoints": {},
"transfer": {},
"fallthrough": {},
"ignore": {},
},
},
"k8s_external": {
options: map[string]option{
"apex": {},
"ttl": {},
},
},
"prometheus": {},
"proxy": {
status: removed,
replacedBy: "forward",
action: proxyToForwardPluginAction,
options: proxyToForwardOptionsMigrations,
},
"forward": {},
"cache": {
options: map[string]option{
"success": {},
"denial": {},
"prefetch": {},
},
},
"loop": {},
"reload": {},
"loadbalance": {},
},
},
"1.4.0": {
nextVersion: "1.5.0",
dockerImageID: "a9e015907f63",
plugins: map[string]plugin{
"errors": {
options: map[string]option{
"consolidate": {},
},
},
"health": {},
"autopath": {},
"kubernetes": {
options: map[string]option{
"resyncperiod": {},
"endpoint": {}, // TODO: Multiple endpoint deprecation
"tls": {},
"kubeconfig": {},
"namespaces": {},
"labels": {},
"pods": {},
"endpoint_pod_names": {},
"upstream": {
status: deprecated,
action: removeOption,
},
"ttl": {},
"noendpoints": {},
"transfer": {},
"fallthrough": {},
"ignore": {},
},
},
"k8s_external": {
options: map[string]option{
"apex": {},
"ttl": {},
},
},
"prometheus": {},
"proxy": {
status: deprecated,
replacedBy: "forward",
action: proxyToForwardPluginAction,
options: proxyToForwardOptionsMigrations,
},
"forward": {},
"cache": {
options: map[string]option{
"success": {},
"denial": {},
"prefetch": {},
},
},
"loop": {},
"reload": {},
"loadbalance": {},
},
},
"1.3.1": {
nextVersion: "1.4.0",
k8sRelease: "1.14",
dockerImageID: "eb516548c180",
defaultConf: `.:53 {
errors
health
kubernetes * *** {
pods insecure
upstream
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
forward . *
cache 30
loop
reload
loadbalance
}`,
plugins: map[string]plugin{
"errors": {
options: map[string]option{
"consolidate": {},
},
},
"health": {},
"autopath": {},
"kubernetes": {
options: map[string]option{
"resyncperiod": {},
"endpoint": {}, // TODO: Multiple endpoint deprecation
"tls": {},
"kubeconfig": {},
"namespaces": {},
"labels": {},
"pods": {},
"endpoint_pod_names": {},
"upstream": {},
"ttl": {},
"noendpoints": {},
"transfer": {},
"fallthrough": {},
"ignore": {},
},
},
"k8s_external": {
options: map[string]option{
"apex": {},
"ttl": {},
},
},
"prometheus": {},
"proxy": {},
"forward": {},
"cache": {
options: map[string]option{
"success": {},
"denial": {},
"prefetch": {},
},
},
"loop": {},
"reload": {},
"loadbalance": {},
},
},
}
var proxyToForwardOptionsMigrations = map[string]option{
"policy": {
action: func(o *corefile.Option) (*corefile.Option, error) {
if len(o.Args) == 2 && o.Args[1] == "least_conn" {
o.Name = "force_tcp"
o.Args = nil
}
return o, nil
},
},
"except": {},
"fail_timeout": {action: removeOption},
"max_fails": {action: removeOption},
"health_check": {action: removeOption},
"spray": {action: removeOption},
"protocol": {
action: func(o *corefile.Option) (*corefile.Option, error) {
if len(o.Args) >= 2 && o.Args[1] == "force_tcp" {
o.Name = "force_tcp"
o.Args = nil
return o, nil
}
return nil, nil
},
},
}
var proxyToForwardPluginAction = func(p *corefile.Plugin) (*corefile.Plugin, error) { return renamePlugin(p, "forward") }