kelseyhightower / certificate-init-container Goto Github PK
View Code? Open in Web Editor NEWBootstrap TLS certificates for Pods using the Kubernetes certificates API.
License: Apache License 2.0
Bootstrap TLS certificates for Pods using the Kubernetes certificates API.
License: Apache License 2.0
Right now the CN will always be the 'default' ip-based CN, but some client certificate auth schemes use only CN to authenticate (namely: http://floragunncom.github.io/search-guard-docs/tls_certificates_production.html). To facilitate glob matching like: *.subdomain.namespace.svc.cluster.local
on CN, I would suggest having a flag that switches the array places of the headless service hostname and the pod ip hostname. Will submit PR soon.
I have a use-case that requires me to specify a bespoke common name (CN) that is different from the first DNS name (dnsName[0]
). It'd be nice to have a flag that let's me overwrite the common name so that it's different from the first DNS name.
kubectl create -f tls-app.yaml
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
tls-app-dc7787455-69rhx 0/1 Init:Error 1 6s
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
tls-app-dc7787455-69rhx 0/1 Init:CrashLoopBackOff 1 12s
$ kubectl logs tls-app-dc7787455-69rhx
Error from server (BadRequest): container "tls-app" in pod "tls-app-dc7787455-69rhx" is waiting to start: PodInitializing
I'm just running the yaml uploaded in keley's github repository. Am I missing something?
context: kubernetes 1.6.0, mongodb stateful set with certificate-init-container
problem: after approving the csr request and a successful exit of the init container, mongo pod has mounted the tls directory, in which a valid key file appears to be present, but the corresponding crt file appears to be empty.
here is the result of executing commands in that container:
Leifs-MacBook-Pro:devops leif$ kubectl --namespace=www exec mongo-0 --container mongo ls /etc/tls
tls.crt
tls.csr
tls.key
Leifs-MacBook-Pro:devops leif$ kubectl --namespace=www exec mongo-0 --container mongo cat /etc/tls/tls.crt
Leifs-MacBook-Pro:devops leif$ kubectl --namespace=www exec mongo-0 --container mongo cat /etc/tls/tls.key
-----BEGIN RSA PRIVATE KEY-----
MIICXAIBAAKBgQDgOIfy6cg0QOa5xdsHqVaTQUMNjx3noKrzIhFcZjkhyEDHBGg7
q79vL412QGh/J4jABDDBlBtJYht6Joif9/CWsJDK8nukCtIUGAkanfqN9LYw6Kx0
+zekhD4VYuqBkdHhX4gPergQEx2KPwYTiMcopHU7ZjcWHhg5KwjKDxWyYQIDAQAB
AoGBAMMw80iIM/0pMrIuh8pXpEJ04cZ//GyT9b3KvopNgxbhmWKnd4XascA9CU0U
LOPkqqtd+oPKRybO/VSNDwsTcKBcH+By2apnruV5Fyq7ajZ9p9FcfKWB8ULJpTGV
ZvxWJmlSN1sBxzHRavxfYUhPxKMta2cAoDcqgd2x6JXg8/txAkEA4dtD9/pS59e0
vfsBl7pN6aobMXFTcs5fNi43u/PgA1BKR8B1uEb79+DqZdlTx74eGQ8rjfA6cJzF
E1fmBXqqdwJBAP4lYUY9DZKBH/m9hw4pe51s1PS/4ysDNklzBFsFRO/mjZhlWEc3
EhfpqIHCC958D2Y7zyPlwejHkoQt/jewZ+cCQEDFrEFyxdH9l7UgRj2oTW3kvfW5
BXCYZM/aA1vgve7VWOgo9tnJabuWAkMBR7ix+lm/cwM60Ne47f/1Jl+N5VMCQCvy
wNiJlEBCbgoc2S78w3CcslLEn/7/JjMbXaRzy9EEeHXjCJoADvPtpwMRUEYgA/W0
4AQgJiEf6dlLrstoiP8CQFMhrjexarF7GkqwdL5uHD+3V8EdkVEh9LPKcEX2zO9e
r6ULfXqfGJrDmH25MRCD3P6AYVubWzQbCUmpCxM1esA=
-----END RSA PRIVATE KEY-----
happy to provide more context or the associated yaml files
I have a use-case that requires me to set the OU (Organizational Unit) and SN (Serial Number). It'd be nice to have a flag that lets me set the OU, and a flag that lets me set the SN or have the SN autogenerated.
I am getting an error while trying to load this init container in my deployment:
2018/06/14 12:32:05 wrote /etc/tls/tls.key
2018/06/14 12:32:05 wrote /etc/tls/tls.csr
2018/06/14 12:32:05 unable to create the certificate signing request: resource not namespaced
Here is my deployment yaml:
apiVersion: apps/v1
kind: Deployment
metadata:
name: users
labels:
app: users
spec:
replicas: 1
selector:
matchLabels:
app: users
template:
metadata:
labels:
app: users
spec:
initContainers:
- name: certificate-init-container
image: gcr.io/hightowerlabs/certificate-init-container:0.0.2
imagePullPolicy: Always
env:
- name: NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
args:
- "-additional-dnsnames=comply-online.com"
- "-cert-dir=/etc/tls"
- "-namespace=$(NAMESPACE)"
- "-pod-ip=$(POD_IP)"
- "-pod-name=$(POD_NAME)"
- "-service-names=users"
volumeMounts:
- name: tls
mountPath: /etc/tls
containers:
- name: users
imagePullPolicy: Always
image: compliance/compliance-users
args:
- "-tls-cert=/etc/tls/tls.crt"
- "-tls-key=/etc/tls/tls.key"
readinessProbe: # Check when application is ready
httpGet:
path: "/api/v1/ready"
port: nodejs-port
initialDelaySeconds: 15
timeoutSeconds: 5
livenessProbe: # healthcheck every 60 seconds
httpGet:
valueFrom:
fieldRef:
fieldPath: status.podIP
args:
- "-additional-dnsnames=comply-online.com"
- "-cert-dir=/etc/tls"
- "-namespace=$(NAMESPACE)"
- "-pod-ip=$(POD_IP)"
- "-pod-name=$(POD_NAME)"
- "-service-names=users"
volumeMounts:
- name: tls
mountPath: /etc/tls
containers:
- name: users
imagePullPolicy: Always
image: compliance/compliance-users
args:
- "-tls-cert=/etc/tls/tls.crt"
- "-tls-key=/etc/tls/tls.key"
readinessProbe: # Check when application is ready
httpGet:
path: "/api/v1/ready"
port: nodejs-port
initialDelaySeconds: 15
timeoutSeconds: 5
livenessProbe: # healthcheck every 60 seconds
httpGet:
path: "/api/v1/ready"
port: nodejs-port
initialDelaySeconds: 15
timeoutSeconds: 10
periodSeconds: 60
ports:
- name: nodejs-port
containerPort: 3000
- name: sslport
containerPort: 3443
volumeMounts:
- name: tls
mountPath: /etc/tls
- name: mongo
image: mongo
ports:
- name: mongo
containerPort: 27017
hostPort: 27017
volumeMounts:
- name: mongo-persistent-storage
mountPath: /data/db
volumes:
- name: tls
emptyDir: {}
- name: mongo-persistent-storage
emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
name: users
labels:
app: users
spec:
selector:
app: users
ports:
- port: 3000
protocol: TCP
type: ClusterIP
---
apiVersion: v1
kind: Service
metadata:
name: mongo
spec:
ports:
- port: 27017
targetPort: 27017
selector:
app: mongo
type: ClusterIP
Which namespace is it referring to?
Capturing thoughts from an email thread:
I think it would possible to leverage
the confidentiality of the service account token to do this e.g. an
approval controller will approve these dual client/server certs if and
only if:
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