Kubernetes: Difference between revisions
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* http://alesnosek.com/blog/2017/02/14/accessing-kubernetes-pods-from-outside-of-the-cluster/ |
* http://alesnosek.com/blog/2017/02/14/accessing-kubernetes-pods-from-outside-of-the-cluster/ |
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= Disable some RBD features (or k8s will fail to launch pod) = |
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= Petsets = |
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* fast-diff |
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* object-map |
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* deep-flatten |
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must all be disabled |
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<pre> |
<pre> |
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rbd feature disable ssd/elasticsearch-data-01 fast-diff object-map deep-flatten |
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Skip to content |
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</pre> |
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Personal Open source Business Explore |
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Sign upSign inPricingBlogSupport |
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= RBD inside kubernetes = |
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This repository |
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* https://github.com/kubernetes/examples/tree/master/staging/volumes/rbd |
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Search |
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Watch 1,512 Star 18,562 Fork 6,134 kubernetes/kubernetes |
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Spent some time toying around with it but couldn't get it to work - it is a must to add the secret as described here: https://github.com/kubernetes/examples/tree/master/staging/volumes/rbd#use-ceph-authentication-secret and also add that part to the manifest: |
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Code Issues 4,613 Pull requests 678 Projects 7 Wiki Pulse Graphs |
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<pre> |
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Branch: master Find file Copy pathkubernetes/test/e2e/testing-manifests/petset/redis/petset.yaml |
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... |
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f2bab13 4 days ago |
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user: admin |
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@janetkuo janetkuo Remove 0 terminationGracePeriodSeconds from statefulset manifests |
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keyring: /etc/ceph/ceph.client.admin.keyring |
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2 contributors @janetkuo @bprashanth |
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secretRef: |
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RawBlameHistory |
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name: ceph-secret |
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98 lines (97 sloc) 2.66 KB |
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... |
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apiVersion: apps/v1beta1 |
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</pre> |
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kind: StatefulSet |
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Link to example rbd manifest: https://github.com/kubernetes/examples/blob/master/staging/volumes/rbd/rbd.yaml |
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= Kube-dns - stub local DNS-servers with ip and zones = |
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<pre> |
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apiVersion: v1 |
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kind: ConfigMap |
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metadata: |
metadata: |
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name: |
name: kube-dns |
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namespace: kube-system |
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spec: |
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data: |
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serviceName: "redis" |
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stubDomains: | |
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{"hq.skytech.dk": ["192.168.0.24", "10.0.0.24"]} |
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template: |
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metadata: |
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labels: |
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app: redis |
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annotations: |
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pod.alpha.kubernetes.io/initialized: "true" |
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pod.alpha.kubernetes.io/init-containers: '[ |
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{ |
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"name": "install", |
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"image": "gcr.io/google_containers/redis-install-3.2.0:e2e", |
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"imagePullPolicy": "Always", |
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"args": ["--install-into=/opt", "--work-dir=/work-dir"], |
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"volumeMounts": [ |
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{ |
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"name": "opt", |
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"mountPath": "/opt" |
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}, |
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{ |
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"name": "workdir", |
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"mountPath": "/work-dir" |
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} |
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] |
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}, |
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{ |
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"name": "bootstrap", |
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"image": "debian:jessie", |
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"command": ["/work-dir/peer-finder"], |
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"args": ["-on-start=\"/work-dir/on-start.sh\"", "-service=redis"], |
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"env": [ |
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{ |
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"name": "POD_NAMESPACE", |
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"valueFrom": { |
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"fieldRef": { |
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"apiVersion": "v1", |
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"fieldPath": "metadata.namespace" |
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} |
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} |
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} |
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], |
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"volumeMounts": [ |
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{ |
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"name": "opt", |
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"mountPath": "/opt" |
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}, |
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{ |
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"name": "workdir", |
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"mountPath": "/work-dir" |
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} |
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] |
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} |
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]' |
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spec: |
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containers: |
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- name: redis |
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image: debian:jessie |
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ports: |
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- containerPort: 6379 |
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name: peer |
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command: |
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- /opt/redis/redis-server |
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args: |
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- /opt/redis/redis.conf |
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readinessProbe: |
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exec: |
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command: |
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- sh |
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- -c |
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- "/opt/redis/redis-cli -h $(hostname) ping" |
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initialDelaySeconds: 15 |
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timeoutSeconds: 5 |
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volumeMounts: |
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- name: datadir |
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mountPath: /data |
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- name: opt |
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mountPath: /opt |
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volumes: |
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- name: opt |
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emptyDir: {} |
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- name: workdir |
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emptyDir: {} |
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volumeClaimTemplates: |
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- metadata: |
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name: datadir |
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annotations: |
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volume.alpha.kubernetes.io/storage-class: anything |
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spec: |
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accessModes: [ "ReadWriteOnce" ] |
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resources: |
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requests: |
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storage: 1Gi |
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</pre> |
</pre> |
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Latest revision as of 09:17, 13 August 2019
How to access Pods externally
Disable some RBD features (or k8s will fail to launch pod)
- fast-diff
- object-map
- deep-flatten
must all be disabled
rbd feature disable ssd/elasticsearch-data-01 fast-diff object-map deep-flatten
RBD inside kubernetes
Spent some time toying around with it but couldn't get it to work - it is a must to add the secret as described here: https://github.com/kubernetes/examples/tree/master/staging/volumes/rbd#use-ceph-authentication-secret and also add that part to the manifest:
...
user: admin
keyring: /etc/ceph/ceph.client.admin.keyring
secretRef:
name: ceph-secret
...
Link to example rbd manifest: https://github.com/kubernetes/examples/blob/master/staging/volumes/rbd/rbd.yaml
Kube-dns - stub local DNS-servers with ip and zones
apiVersion: v1
kind: ConfigMap
metadata:
name: kube-dns
namespace: kube-system
data:
stubDomains: |
{"hq.skytech.dk": ["192.168.0.24", "10.0.0.24"]}