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Draft for Kubernetes support (#138)

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Fixes #64
* Draft for Kubernetes support
* fix image name
* Update kubernetes.md
* Basic outline of kubernetes howto both quickstart and production
This commit is contained in:
C Cirello
2016-10-20 09:08:30 -07:00
committed by Seif Lotfy سيف لطفي
parent 3697fb4ca5
commit 154df15e88
10 changed files with 283 additions and 0 deletions
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7
docs/kubernetes-production/functions-config.yaml Normal file
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kind: ConfigMap
apiVersion: v1
metadata:
name: functions-config
data:
MQ: redis://redis-master.default
DB: postgres://postgres:mysecretpassword@postgresql-master.default/?sslmode=disable

43
docs/kubernetes-production/functions-deployment.yaml Normal file
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---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: functions
labels:
app: functions
spec:
replicas: 1
template:
metadata:
labels:
app: functions
spec:
containers:
- name: functions
image: iron/functions
securityContext:
privileged: true
env:
- name: DOCKER_HOST
value: unix:///var/run/docker.sock
- name: MQ
valueFrom:
configMapKeyRef:
name: functions-config
key: MQ
- name: DB
valueFrom:
configMapKeyRef:
name: functions-config
key: DB
volumeMounts:
- mountPath: "/var/run/docker.sock"
name: docker-socket
readOnly: false
ports:
- name: http-server
containerPort: 8080
volumes:
- name: docker-socket
hostPath:
path: "/var/run/docker.sock"

14
docs/kubernetes-production/functions-service.yaml Normal file
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@@ -0,0 +1,14 @@
---
kind: Service
apiVersion: v1
metadata:
name: functions
labels:
app: functions
spec:
ports:
- port: 8080
targetPort: http-server
selector:
app: functions
type: LoadBalancer

17
docs/kubernetes-production/postgresql-deployment.yaml Normal file
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@@ -0,0 +1,17 @@
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: postgresql-master
spec:
replicas: 1
template:
metadata:
labels:
app: postgresql
role: datastore
spec:
containers:
- name: functions-postgresql
image: postgres
ports:
- containerPort: 5432

14
docs/kubernetes-production/postgresql-service.yaml Normal file
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@@ -0,0 +1,14 @@
apiVersion: v1
kind: Service
metadata:
name: postgresql-master
labels:
app: postgresql
role: datastore
spec:
ports:
- port: 5432
targetPort: 5432
selector:
app: postgresql
role: datastore

17
docs/kubernetes-production/redis-deployment.yaml Normal file
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@@ -0,0 +1,17 @@
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: redis-master
spec:
replicas: 1
template:
metadata:
labels:
app: redis
role: mq
spec:
containers:
- name: functions-redis
image: redis
ports:
- containerPort: 6379

14
docs/kubernetes-production/redis-service.yaml Normal file
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@@ -0,0 +1,14 @@
apiVersion: v1
kind: Service
metadata:
name: redis-master
labels:
app: redis
role: mq
spec:
ports:
- port: 6379
targetPort: 6379
selector:
app: redis
role: mq

33
docs/kubernetes-quick/deployment.yaml Normal file
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@@ -0,0 +1,33 @@
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: functions
labels:
app: functions
spec:
replicas: 1
template:
metadata:
labels:
app: functions
spec:
containers:
- name: functions
image: iron/functions
securityContext:
privileged: true
env:
- name: DOCKER_HOST
value: unix:///var/run/docker.sock
volumeMounts:
- mountPath: "/var/run/docker.sock"
name: docker-socket
readOnly: false
ports:
- name: http-server
containerPort: 8080
volumes:
- name: docker-socket
hostPath:
path: "/var/run/docker.sock"

14
docs/kubernetes-quick/service.yaml Normal file
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@@ -0,0 +1,14 @@
---
kind: Service
apiVersion: v1
metadata:
name: functions
labels:
app: functions
spec:
ports:
- port: 8080
targetPort: http-server
selector:
app: functions
type: LoadBalancer

110
docs/kubernetes.md Normal file
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# HOWTO run IronFunction in Kubernetes at AWS
*Prerequisite 1: it assumes you have a working Kubernetes, and a locally configured kubectl.*
*Prerequisite 2: It assumes you are using Kubernetes 1.4 or newer.*
## Quickstart
### Steps
1. Start IronFunction in the Kubernetes cluster:
```ShellSession
$ cd docs/
$ kubectl create -f kubernetes-quick
```
2. Once the daemon is started, check where it is listening for connections:
```ShellSession
# kubectl describe svc functions
Name: functions
Namespace: default
Labels: app=functions
Selector: app=functions
Type: LoadBalancer
IP: 10.0.116.122
LoadBalancer Ingress: a23122e39900111e681ba0e29b70bb46-630391493.us-east-1.elb.amazonaws.com
Port: <unset> 8080/TCP
NodePort: <unset> 30802/TCP
Endpoints: 10.244.1.12:8080
Session Affinity: None
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
22m 22m 1 {service-controller } Normal CreatingLoadBalancer Creating load balancer
22m 22m 1 {service-controller } Normal CreatedLoadBalancer Created load balancer
```
Note `a23122e39900111e681ba0e29b70bb46-630391493.us-east-1.elb.amazonaws.com` in `LoadBalancer Ingress` line, this is where the service is listening.
3. Test the cluster:
```ShellSession
$ export IRON_FUNCTION=$(kubectl get -o json svc functions | jq -r '.status.loadBalancer.ingress[0].hostname'):8080
$ curl -H "Content-Type: application/json" -X POST -d '{ "app": { "name":"myapp" } }' http://$IRON_FUNCTION/v1/apps
{"message":"App successfully created","app":{"name":"myapp","config":null}}
$ curl -H "Content-Type: application/json" -X POST -d '{ "route": { "type": "sync", "path":"/hello-sync", "image":"iron/hello" } }' http://$IRON_FUNCTION/v1/apps/myapp/routes
{"message":"Route successfully created","route":{"appname":"myapp","path":"/hello-sync","image":"iron/hello","memory":128,"type":"sync","config":null}}
$ curl -H "Content-Type: application/json" -X POST -d '{ "name":"Johnny" }' http://$IRON_FUNCTION/r/myapp/hello-sync
Hello Johnny!
```
## Production
### Steps
1. Start IronFunction and its dependencies:
```ShellSession
$ cd docs/
$ kubectl create -f kubernetes-production
```
*Optionally, you might have both Redis and PostgreSQL started somewhere else, in this case, remember to update kubernetes-production/functions-config.yaml with the appropriate configuration.*
2. Once the daemon is started, check where it is listening for connections:
```ShellSession
# kubectl describe svc functions
Name: functions
Namespace: default
Labels: app=functions
Selector: app=functions
Type: LoadBalancer
IP: 10.0.116.122
LoadBalancer Ingress: a23122e39900111e681ba0e29b70bb46-630391493.us-east-1.elb.amazonaws.com
Port: <unset> 8080/TCP
NodePort: <unset> 30802/TCP
Endpoints: 10.244.1.12:8080
Session Affinity: None
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
22m 22m 1 {service-controller } Normal CreatingLoadBalancer Creating load balancer
22m 22m 1 {service-controller } Normal CreatedLoadBalancer Created load balancer
```
Note `a23122e39900111e681ba0e29b70bb46-630391493.us-east-1.elb.amazonaws.com` in `LoadBalancer Ingress` line, this is where the service is listening.
3. Test the cluster:
```ShellSession
$ export IRON_FUNCTION=$(kubectl get -o json svc functions | jq -r '.status.loadBalancer.ingress[0].hostname'):8080
$ curl -H "Content-Type: application/json" -X POST -d '{ "app": { "name":"myapp" } }' http://$IRON_FUNCTION/v1/apps
{"message":"App successfully created","app":{"name":"myapp","config":null}}
$ curl -H "Content-Type: application/json" -X POST -d '{ "route": { "type": "sync", "path":"/hello-sync", "image":"iron/hello" } }' http://$IRON_FUNCTION/v1/apps/myapp/routes
{"message":"Route successfully created","route":{"appname":"myapp","path":"/hello-sync","image":"iron/hello","memory":128,"type":"sync","config":null}}
$ curl -H "Content-Type: application/json" -X POST -d '{ "name":"Johnny" }' http://$IRON_FUNCTION/r/myapp/hello-sync
Hello Johnny!
```