Kubernetes isn't allowing me to create a pod with securityContext runAsUser - kubernetes

Question

Summary:
I have pods with security context: runAsUser: 1337 that fail to start due to being disallowed by policy. I have altered admission-control to no success (as suggested here
and here)
What else do I need to force through this kind of security context?
Details
I'm working through the https://istio.io/docs/samples/bookinfo.html example to start porting over to istio.
I have a deployment named details-v1 (see below) from which a replica set and pod have been created. The pod is stuck in pending.
NAME READY STATUS RESTARTS AGE
details-v1-3207759430-nt9tt 0/2 Pending 0 34m
describe on the pod shows the cause of the error:
FailedValidation Error validating pod details-v1-3207759430-nt9tt.azs-master from api, ignoring: spec.initContainers[1].securityContext.privileged: Forbidden: disallowed by policy
In order to get this far, I have already made changes to the kube-apiserver:
/usr/local/bin/kube-apiserver \
--admission-control=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota \
--allow-privileged=true \
Deployment:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
annotations:
deployment.kubernetes.io/revision: "1"
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"extensions/v1beta1","kind":"Deployment","metadata":{"annotations":{},"creationTimestamp":null,"name":"details-v1","namespace":"azs-master"},"spec":{"replicas":1,"strategy":{},"template":{"metadata":{"annotations":{"alpha.istio.io/sidecar":"injected","alpha.istio.io/version":"jenkins#ubuntu-16-04-build-12ac793f80be71-0.1.6-dab2033","pod.beta.kubernetes.io/init-containers":"[{\"args\":[\"-p\",\"15001\",\"-u\",\"1337\"],\"image\":\"docker.io/istio/init:0.1\",\"imagePullPolicy\":\"Always\",\"name\":\"init\",\"securityContext\":{\"capabilities\":{\"add\":[\"NET_ADMIN\"]}}},{\"args\":[\"-c\",\"sysctl -w kernel.core_pattern=/tmp/core.%e.%p.%t \\u0026\\u0026 ulimit -c unlimited\"],\"command\":[\"/bin/sh\"],\"image\":\"alpine\",\"imagePullPolicy\":\"Always\",\"name\":\"enable-core-dump\",\"securityContext\":{\"privileged\":true}}]"},"creationTimestamp":null,"labels":{"app":"details","version":"v1"}},"spec":{"containers":[{"image":"istio/examples-bookinfo-details-v1","imagePullPolicy":"IfNotPresent","name":"details","ports":[{"containerPort":9080}],"resources":{}},{"args":["proxy","sidecar","-v","2"],"env":[{"name":"POD_NAME","valueFrom":{"fieldRef":{"fieldPath":"metadata.name"}}},{"name":"POD_NAMESPACE","valueFrom":{"fieldRef":{"fieldPath":"metadata.namespace"}}},{"name":"POD_IP","valueFrom":{"fieldRef":{"fieldPath":"status.podIP"}}}],"image":"docker.io/istio/proxy_debug:0.1","imagePullPolicy":"Always","name":"proxy","resources":{},"securityContext":{"runAsUser":1337},"volumeMounts":[{"mountPath":"/etc/certs","name":"istio-certs","readOnly":true}]}],"volumes":[{"name":"istio-certs","secret":{"secretName":"istio.default"}}]}}},"status":{}}
creationTimestamp: 2017-06-23T13:30:00Z
generation: 1
labels:
app: details
version: v1
name: details-v1
namespace: azs-master
resourceVersion: "29678612"
selfLink: /apis/extensions/v1beta1/namespaces/azs-master/deployments/details-v1
uid: 0eacea4a-5818-11e7-af0e-0a55ca98bb17
spec:
replicas: 1
selector:
matchLabels:
app: details
version: v1
strategy:
rollingUpdate:
maxSurge: 1
maxUnavailable: 1
type: RollingUpdate
template:
metadata:
annotations:
alpha.istio.io/sidecar: injected
alpha.istio.io/version: jenkins#ubuntu-16-04-build-12ac793f80be71-0.1.6-dab2033
pod.alpha.kubernetes.io/init-containers: '[{"name":"init","image":"docker.io/istio/init:0.1","args":["-p","15001","-u","1337"],"resources":{},"imagePullPolicy":"Always","securityContext":{"capabilities":{"add":["NET_ADMIN"]}}},{"name":"enable-core-dump","image":"alpine","command":["/bin/sh"],"args":["-c","sysctl
-w kernel.core_pattern=/tmp/core.%e.%p.%t \u0026\u0026 ulimit -c unlimited"],"resources":{},"imagePullPolicy":"Always","securityContext":{"privileged":true}}]'
pod.beta.kubernetes.io/init-containers: '[{"name":"init","image":"docker.io/istio/init:0.1","args":["-p","15001","-u","1337"],"resources":{},"imagePullPolicy":"Always","securityContext":{"capabilities":{"add":["NET_ADMIN"]}}},{"name":"enable-core-dump","image":"alpine","command":["/bin/sh"],"args":["-c","sysctl
-w kernel.core_pattern=/tmp/core.%e.%p.%t \u0026\u0026 ulimit -c unlimited"],"resources":{},"imagePullPolicy":"Always","securityContext":{"privileged":true}}]'
creationTimestamp: null
labels:
app: details
version: v1
spec:
containers:
- image: istio/examples-bookinfo-details-v1
imagePullPolicy: IfNotPresent
name: details
ports:
- containerPort: 9080
protocol: TCP
resources: {}
terminationMessagePath: /dev/termination-log
- args:
- proxy
- sidecar
- -v
- "2"
env:
- name: POD_NAME
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.namespace
- name: POD_IP
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: status.podIP
image: docker.io/istio/proxy_debug:0.1
imagePullPolicy: Always
name: proxy
resources: {}
securityContext:
runAsUser: 1337
terminationMessagePath: /dev/termination-log
volumeMounts:
- mountPath: /etc/certs
name: istio-certs
readOnly: true
dnsPolicy: ClusterFirst
restartPolicy: Always
securityContext: {}
terminationGracePeriodSeconds: 30
volumes:
- name: istio-certs
secret:
defaultMode: 420
secretName: istio.default
status:
conditions:
- lastTransitionTime: 2017-06-23T13:30:00Z
lastUpdateTime: 2017-06-23T13:30:00Z
message: Deployment has minimum availability.
reason: MinimumReplicasAvailable
status: "True"
type: Available
observedGeneration: 1
replicas: 1
unavailableReplicas: 1
updatedReplicas: 1
Kubernetes server version: 1.5.6

Answer 1

The Pending state indicates that this was blocked by the Kubelet, which also needs the --allow-priveleged flag.