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  1574  次浏览      30
 2021-2-26
 
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2¡¢¼òµ¥µ«ÊÇÓеã¹ýʱµÄÀϰæÁ÷Á¿»úÖÆ

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ÏȻعËһϠKnative ¹Ù·½µÄÒ»¸ö¼òµ¥µÄÔ­ÀíʾÒâͼÈçÏÂËùʾ¡£Óû§´´½¨Ò»¸ö Knative Service£¨ksvc£©ºó£¬Knative »á×Ô¶¯´´½¨ Route£¨route£©¡¢Configuration£¨cfg£©×ÊÔ´£¬È»ºó cfg »á´´½¨¶ÔÓ¦µÄ Revision£¨rev£©°æ±¾¡£rev ʵ¼ÊÉÏÓֻᴴ½¨ Deployment Ìṩ·þÎñ£¬Á÷Á¿×îÖÕ»á¸ù¾Ý route µÄÅäÖ㬵¼Èëµ½ÏàÓ¦µÄ rev ÖС£

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ÔÚ¼¯³ÉʹÓà Istio ²¿Êðʱ£¬Route ĬÈϲÉÓõÄÊÇ Istio Ingress Gateway ʵÏÖ£¬´ó¸ÅÔÚ Knative 0.6 °æ±¾Ö®Ç°£¬ÎÒÃÇ¿ÉÒÔ·¢ÏÖ£¬Route µÄÁ÷Á¿×ª·¢±¾ÖÊÉÏÊÇÓÉ Istio virtualservice£¨vs£©¿ØÖÆ¡£¸±±¾ÊýΪ 0 ʱ£¬vs ÈçÏÂËùʾ£¬ÆäÖÐ destination Ö¸ÏòµÄÊÇ Activator ×é¼þ¡£´Ëʱ Activator »á°ïÖúת·¢ÀäÆô¶¯Ê±µÄÇëÇó¡£

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: route-f8c50d56-3f47-11e9-9a9a-08002715c9e6
spec:
gateways:
- knative-ingress-gateway
- mesh
hosts:
- helloworld-go.default.example.com
- helloworld-go.default.svc.cluster.local
http:
- appendHeaders:
route:
- destination:
host: Activator-Service.knative-serving.svc.cluster.local
port:
number: 80
weight: 100

µ±·þÎñ¸±±¾Êý²»Îª 0 Ö®ºó£¬vs ±äΪÈçÏÂËùʾ£¬½« Ingress Gateway µÄÁ÷Á¿Ö±½Óת·¢µ½·þÎñ Pod ÉÏ¡£

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: route-f8c50d56-3f47-11e9-9a9a-08002715c9e6
spec:
hosts:
- helloworld-go.default.example.com
- helloworld-go.default.svc.cluster.local
http:
- match:
route:
- destination:
host: helloworld-go-2xxcn-Service.default.svc.cluster.local
port:
number: 80
weight: 100

ÎÒÃÇ¿ÉÒÔºÜÃ÷ÏԵĿ´³ö£¬Knative ¾ÍÊÇͨ¹ýÐÞ¸Ä vs µÄ destination host À´ÊµÏÖÀäÆô¶¯ÖеÄÁ÷Á¿±£³ÖºÍת·¢¡£

ÏàÐÅĿǰÄãÔÚÍøÉÏÄÜÕÒµ½×ÊÁÏ£¬Ò²»ù±¾ÉÏÍ£ÁôÔڸý׶Ρ£²»¹ý£¬ÓÉÓÚ Knative µÄ¿ìËÙµü´ú£¬ÕâÀïµÄһЩʵÏÖϸ½Ú·ÖÎöÒѾ­¹ýʱ¡£

ÏÂÃæÒÔ 0.9 °æ±¾ÎªÀý£¬ÎÒÃÇ×Ðϸ̽¾¿Ò»ÏÂÏÖÓеÄʵÏÖ·½Ê½£¬ºÍ¹ØÓÚ Knative Á÷Á¿µÄÕæÕýÃØÃÜ¡£

3¡¢¸´ÔÓµ«ÊǸüÓÅÒìµÄаæÁ÷Á¿»úÖÆ

¼øÓÚ¹Ù·½Îĵµ²¢Ã»ÓÐ×îеľßÌåʵÏÖ»úÖÆ½éÉÜ£¬ÎÒÃÇ´´½¨Ò»¸ö¼òµ¥µÄ hello-go ksvc£¬²¢ÒԴ˽øÐзÖÎö¡£ksvc ÈçÏÂËùʾ£º

apiVersion: serving.knative.dev/v1alpha1
kind: Service
metadata:
name: hello-go
namespace: faas
spec:
template:
spec:
containers:
- image: harbor-yx-jd-dev.yx.netease.com/library/helloworld-go:v0.1
env:
- name: TARGET
value: "Go Sample v1"

virtualservice µÄ±ä»¯

±ÊÕߵĻ·¾³¿É¼òµ¥µÄÈÏΪÊÇÒ»¸ö±ê×¼µÄ Istio ²¿Êð£¬Serverless Íø¹ØÎª Istio Ingress Gateway£¬ËùÒÔ´´½¨Íê ksvc ºó£¬ÎªÁËÑéÖ¤·þÎñÊÇ·ñ¿ÉÒÔÕý³£ÔËÐУ¬ÐèÒª·¢ËÍ http ÇëÇóÖÁÍø¹Ø¡£Gateway ×ÊÔ´ÒѾ­ÔÚ²¿Êð Knative µÄʱºò´´½¨£¬ÕâÀïÎÒÃÇÖ»ÐèÒª¹ØÐÄ vs¡£

ÔÚ·þÎñ¸±±¾ÊýΪ 0 µÄʱºò£¬Knative ¿ØÖÆÆ÷´´½¨µÄ vs ¹Ø¼üÅäÖÃÈçÏ£º

spec:
gateways:
- knative-serving/cluster-local-gateway
- knative-serving/knative-ingress-gateway
hosts:
- hello-go.faas
- hello-go.faas.example.com
- hello-go.faas.svc
- hello-go.faas.svc.cluster.local
- f81497077928a654cf9422088e7522d5.probe.invalid
http:
- match:
- authority:
regex: ^hello-go\.faas\.example\.com(?::\d{1,5})?$
gateways:
- knative-serving/knative-ingress-gateway
- authority:
regex: ^hello-go\.faas(\.svc(\.cluster\.local)?)?(?::\d{1,5})?$
gateways:
- knative-serving/cluster-local-gateway
retries:
attempts: 3
perTryTimeout: 10m0s
route:
- destination:
host: hello-go-fpmln.faas.svc.cluster.local
port:
number: 80

vs Ö¸¶¨ÁËÒѾ­´´½¨ºÃµÄ gw£¬Í¬Ê± destination Ö¸ÏòµÄÊÇÒ»¸ö Service ÓòÃû¡£Õâ¸ö Service ¾ÍÊÇ Knative ĬÈÏ×Ô¶¯´´½¨µÄ hello-go ·þÎñµÄ Service¡£Ï¸ÐĵÄÎÒÃÇÓÖ·¢ÏÖ vs µÄ ownerReferences Ö¸ÏòÁËÒ»¸ö Knative µÄ CRD ingress.networking.internal.knative.dev£º

ownerReferences:
- apiVersion: networking.internal.knative.dev/v1alpha1
blockOwnerDeletion: true
controller: true
kind: Ingress
name: hello-go
uid: 4a27a69e-5b9c-11ea-ae53-fa163ec7c05f

¸ù¾ÝÃû×Ö¿ÉÒÔ¿´µ½ÕâÊÇÒ»¸ö Knative ÄÚ²¿Ê¹ÓÃµÄ CRD£¬¸Ã CRD µÄÄÚÈÝÆäʵºÍ vs ±È½ÏÀàËÆ£¬Í¬Ê± ingress.networking.internal.knative.dev µÄ ownerReferences Ö¸ÏòÁËÎÒÃÇÊìϤµÄ route£¬×ܽáÏÂÀ´¾ÍÊÇ£º

route -> kingress(ingress.networking.internal.knative.dev) -> vs

ÔÚÍø¹ØÕâÒ»²ãÉæ¼°µ½µÄ CRD ×ÊÔ´¾ÍÊÇÈçÉÏÕâЩ¡£ÕâÀï kingress µÄÒâÒåÔÚÓÚÔö¼ÓÒ»²ã³éÏó£¬Èç¹ûÎÒÃÇʹÓõÄÊÇ Gloo µÈÆäËûÍø¹Ø£¬Ôò»á½« kingress ת»»³ÉÏàÓ¦µÄÍø¹Ø×ÊÔ´ÅäÖá£×îеİ汾ÖУ¬¸ºÔð kingress µ½ Istio vs µÄ¿ØÖÆÆ÷²¿·Ö´úÂëÒѾ­¶ÀÁ¢³öÒ»¸öÏîÄ¿£¬¿É¼ûÈç½ñµÄ Knative ¶Ô Istio ÒѾ­²»ÊÇÇ¿ÒÀÀµ¡£

ÏÖÔÚ£¬ÎÒÃÇÒѾ­Á˽⵽ Serverless Íø¹ØÊÇÓÉ Knative ¿ØÖÆÆ÷×îÖÕÉú³ÉµÄ vs ÉúЧµ½ Istio Ingress Gateway ÉÏ£¬ÎªÁËÑéÖ¤ÎÒÃǸղŲ¿ÊðµÄ·þÎñÊÇ·ñ¿ÉÒÔÕý³£µÄÔËÐУ¬¼òµ¥µÄÓà curl ÃüÁîÊÔÑéһϡ£ºÍËùÓеÄÍø¹Ø»òÕ߸ºÔؾùºâÆ÷Ò»Ñù£¬¶ÔÓÚ 7 ²ã http ·ÃÎÊ£¬ÎÒÃÇÐèÒªÔÚ Header Àï¼ÓÓòÃû Host£¬ÓÃÓÚÁ÷Á¿×ª·¢µ½¾ßÌåµÄ·þÎñ¡£ÔÚÉÏÃæµÄ vs ÖÐÒѾ­¿ÉÒÔ¿´µ½¶ÔÍâÓòÃûºÍÄÚ²¿ Service ÓòÃû¾ùÒѾ­ÅäÖá£ËùÒÔ£¬Ö»ÐèÒª£º

curl -v -H'Host:hello-go.faas.example.com' <IngressIP>:<Port>

ÆäÖУ¬IngressIP ¼´Íø¹ØÊµÀý¶ÔÍⱩ¶µÄ IP¡£

¶ÔÓÚÀäÆô¶¯À´Ëµ£¬Ä¿Ç°µÄ Knative ÐèÒªµÈÊ®¼¸Ã룬¼´»áÊÕµ½ÇëÇ󡣸ù¾Ý֮ǰÀϰ汾µÄ¾­Ñ飬Õâ¸öʱºò vs »á±»¸üУ¬destination Ö¸Ïò hello-go µÄ Service¡£²»¹ý£¬ÏÖÔÚÎÒÃÇʵ¼Ê·¢ÏÖ£¬vs ûÓÐÈκα仯£¬ÈÔȻָÏòÁË·þÎñµÄ Service¡£

¶Ô±ÈÀϰ汾ÖзþÎñ¸±±¾ÊýΪ 0 ʱ£¬Æäʵ vs µÄ destination Ö¸ÏòµÄÊÇ Activator ×é¼þµÄ¡£µ«ÏÖÔÚ£¬²»¹Ü·þÎñ¸±±¾ÊýÈçºÎ±ä»¯£¬vs Ò»Ö±²»±ä¡£õèõÎÖ»ÄÜ´Ó destination µÄ Service ÓòÃûÈëÊÖ¡£

revision service ̽Ë÷

´´½¨ ksvc ºó£¬Knative »á°ïÎÒÃÇ×Ô¶¯´´½¨ Service ÈçÏÂËùʾ¡£

$ kubectl -n faas get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S)
hello-go ExternalName <none> cluster-local-gateway.istio-system.svc.cluster.local <none>
hello-go-fpmln ClusterIP 10.178.4.126 <none> 80/TCP
hello-go-fpmln-m9mmg ClusterIP 10.178.5.65 <none> 80/TCP,8022/TCP
hello-go-fpmln-metrics ClusterIP 10.178.4.237 <none> 9090/TCP,9091/TCP

hello-go Service ÊÇÒ»¸ö ExternalName Service£¬×÷ÓÃÊǽ« hello-go µÄ Service ÓòÃûÔö¼ÓÒ»¸ö dns CNAME ±ðÃû¼Ç¼£¬Ö¸ÏòÍø¹ØµÄ Service ÓòÃû¡£

¸ù¾Ý Service µÄ annotation ÎÒÃÇ¿ÉÒÔ·¢ÏÖ£¬Knative ¶Ô hello-go-fpmln¡¢hello-go-fpmln-m9mmg ¡¢hello-go-fpmln-metrics ÕâÈý¸ö Service µÄ¶¨Î»·Ö±ðΪ public Service¡¢private Service ºÍ metric Service£¨×îа汾ÒѾ­½« private ºÍ metrics Service ºÏ²¢£©¡£

private Service ºÍ metric Service Æäʵ²»ÄÑÀí½â¡£ÎÊÌâµÄ¹Ø¼ü¾ÍÔÚÕâÀïµÄ public Service£¬×ÐϸÑо¿ hello-go-fpmln Service£¬ÎÒÃÇ¿ÉÒÔ·¢ÏÖÕâÊÇÒ»¸öûÓÐ labelSelector µÄ Service£¬ËüµÄ Endpoint ²»ÊÇ kubernetes ×Ô¶¯´´½¨µÄ£¬ÐèÒª¶îÍâÉú³É¡£

ÔÚ·þÎñ¸±±¾ÊýΪ 0 ʱ£¬²é¿´Ò»Ï Service ¶ÔÓ¦µÄ Endpoint£¬ÈçÏÂËùʾ£º

$ kubectl -n faas get ep
NAME ENDPOINTS AGE
hello-go-fpmln 172.31.16.81:8012
hello-go-fpmln-m9mmg 172.31.16.121:8012,172.31.16.121:8022
hello-go-fpmln-metrics 172.31.16.121:9090,172.31.16.121:9091

ÆäÖУ¬public Service µÄ Endpoint IP ÊÇ Knative Activator µÄ Pod IP£¬Êµ¼Ê·¢ÏÖ Activator µÄ¸±±¾ÊýÔ½¶àÕâÀïÒ²»áÏàÓ¦µÄÔö¼Ó¡£²¢ÇÒÓÉÉÏÃæµÄ·ÖÎö¿ÉÒÔ¿´µ½£¬vs µÄ destination Ö¸ÏòµÄ¾ÍÊÇ public Service¡£

ÊäÈ뼸´Î curl ÃüÁîÄ£ÄâһϠhttp ÇëÇó£¬ËäÈ»¸±±¾Êý´Ó 0 ¿ªÊ¼Ôö¼Óµ½ 1 ÁË£¬µ«ÊÇÕâÀïµÄ Endpoint ȴûÓб仯£¬ÈÔȻΪ Activator Pod IP¡£½Ó×ÅʹÓà hey À´Ñ¹²âһϣº

./hey_linux_amd64 -n 1000000 -c 300 -m GET -host helloworld-go.faas.example.com http://<IngressIP>:80

·¢ÏÖ Endpoint ±ä»¯ÁË£¬Í¨¹ý¶Ô±È·þÎñµÄ Pod IP£¬ÒѾ­±ä³ÉÁËÐÂÆô¶¯µÄ·þÎñ Pod IP£¬²»ÔÙÊÇ Activator Pod µÄ IP¡£

$ kubectl -n faas get ep
NAME ENDPOINTS
helloworld-go-mpk25 172.31.16.121:8012
hello-go-fpmln-m9mmg 172.31.16.121:8012,172.31.16.121:8022
hello-go-fpmln-metrics 172.31.16.121:9090,172.31.16.121:9091

Ô­À´£¬ÏÖÔÚа汾µÄÀäÆô¶¯Á÷Á¿×ª·¢»úÖÆÒѾ­²»ÔÙÊÇͨ¹ýÐÞ¸Ä vs À´¸Ä±äÍø¹ØµÄÁ÷Á¿×ª·¢ÅäÖÃÁË£¬¶øÊÇÖ±½Ó¸üзþÎñµÄ public Service ºó¶Ë Endpoint£¬´Ó¶øÊµÏÖ½«Á÷Á¿´Ó Activator ת·¢µ½Êµ¼ÊµÄ·þÎñ Pod ÉÏ¡£

ͨ¹ý½«Á÷Á¿µÄת·¢¹¦ÄÜÄÚ¾Ûµ½ Service/Endpoint ²ã£¬Ò»·½Ãæ¼õСÁËÍø¹ØµÄÅäÖøüÐÂѹÁ¦£¬Ò»·½Ãæ Knative ¿ÉÒÔÔÚ¶Ô½Ó¸÷ÖÖ²»Í¬µÄÍø¹ØÊ±µÄʵÏÖʱ¸ü¼Ó½âñî£¬Íø¹Ø²ã²»ÔÙÐèÒª¹ØÐÄÀäÆô¶¯Ê±µÄÁ÷Á¿×ª·¢»úÖÆ¡£

Á÷Á¿Â·¾¶

ÔÙÉîÈë´ÓÉÏÊöµÄÈý¸ö Service ÈëÊÖÑо¿£¬ËüÃÇµÄ ownerReference ÊÇ serverlessservice.networking.internal . knative .dev(sks)£¬¶ø sks µÄ ownerReference ÊÇ podautoscaler.autoscaling.internal.knative.dev(kpa)¡£

ÔÚѹ²â¹ý³ÌÖÐͬÑù·¢ÏÖ£¬sks »áÔÚÀäÆô¶¯¹ýºó£¬»á´Ó Proxy ģʽ±äΪ Serve ģʽ£º

$ kubectl -n faas get sks
NAME MODE SERVICENAME PRIVATESERVICENAME READY REASON
hello-go-fpmln Proxy hello-go-fpmln hello-go-fpmln-m9mmg True

$ kubectl -n faas get sks
NAME MODE SERVICENAME PRIVATESERVICENAME READY REASON
hello-go-fpmln Serve hello-go-fpmln hello-go-fpmln-m9mmg True

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