Gerrit

Replication

https://gerrit.googlesource.com/plugins/replication/+doc/master/src/main/resources/Documentation/config.md

Helm Charts

Or get the yamls via

https://gerrit.googlesource.com/k8s-gerrit/

not

https://github.com/helm/charts/tree/master/stable

Triage

following https://gerrit.googlesource.com/k8s-gerrit/+/master/helm-charts/gerrit-master/

https://github.com/helm/charts/tree/master/stable/nfs-server-provisioner

https://github.com/helm/charts/blob/master/stable/nfs-server-provisioner/values.yaml

(look at https://github.com/kubernetes-incubator/external-storage/tree/master/nfs-client)

on vm2 in ~/google

sudo cp gerrit-master/values.yaml .
sudo vi values.yaml 
# added hostname, key, cert

sudo helm install ./gerrit-master -n gerrit-master -f values.yaml 
NAME:   gerrit-master
LAST DEPLOYED: Wed Mar 20 19:03:40 2019
NAMESPACE: default
STATUS: DEPLOYED
RESOURCES:
==> v1/Secret
NAME                                       TYPE    DATA  AGE
gerrit-master-gerrit-master-secure-config  Opaque  1     0s
==> v1/ConfigMap
NAME                                   DATA  AGE
gerrit-master-gerrit-master-configmap  2     0s
==> v1/PersistentVolumeClaim
NAME                                  STATUS   VOLUME          CAPACITY  ACCESS MODES  STORAGECLASS  AGE
gerrit-master-gerrit-master-logs-pvc  Pending  default         0s
gerrit-master-gerrit-master-db-pvc    Pending  default         0s
gerrit-master-git-gc-logs-pvc         Pending  default         0s
gerrit-master-git-filesystem-pvc      Pending  shared-storage  0s
==> v1/Service
NAME                                 TYPE      CLUSTER-IP    EXTERNAL-IP  PORT(S)       AGE
gerrit-master-gerrit-master-service  NodePort  10.43.111.61  <none>       80:31329/TCP  0s
==> v1/Deployment
NAME                                    DESIRED  CURRENT  UP-TO-DATE  AVAILABLE  AGE
gerrit-master-gerrit-master-deployment  1        1        1           0          0s
==> v1beta1/CronJob
NAME                  SCHEDULE      SUSPEND  ACTIVE  LAST SCHEDULE  AGE
gerrit-master-git-gc  0 6,18 * * *  False    0       <none>         0s
==> v1beta1/Ingress
NAME                                 HOSTS            ADDRESS  PORTS  AGE
gerrit-master-gerrit-master-ingress  s2.onap.info  80       0s
==> v1/Pod(related)
NAME                                                     READY  STATUS   RESTARTS  AGE
gerrit-master-gerrit-master-deployment-7cb7f96767-xz45w  0/1    Pending  0         0s
NOTES:
A Gerrit master has been deployed.
==================================
Gerrit may be accessed under: s2.onap.info


kubectl get pvc --all-namespaces
NAMESPACE   NAME                                   STATUS    VOLUME    CAPACITY   ACCESS MODES   STORAGECLASS     AGE
default     gerrit-master-gerrit-master-db-pvc     Pending                                       default          4m
default     gerrit-master-gerrit-master-logs-pvc   Pending                                       default          4m
default     gerrit-master-git-filesystem-pvc       Pending                                       shared-storage   4m
default     gerrit-master-git-gc-logs-pvc          Pending                                       default          4m

kubectl describe pod gerrit-master-gerrit-master-deployment-7cb7f96767-xz45w -n default
Events:
  Type     Reason            Age               From               Message
  ----     ------            ----              ----               -------
  Warning  FailedScheduling  4s (x17 over 2m)  default-scheduler  pod has unbound PersistentVolumeClaims

# evidently missing nfs dirs
ubuntu@bell2:~/google$ sudo helm list
NAME         	REVISION	UPDATED                 	STATUS  	CHART              	NAMESPACE
gerrit-master	1       	Wed Mar 20 19:03:40 2019	DEPLOYED	gerrit-master-0.1.0	default  

ubuntu@bell2:~/google$ sudo helm delete gerrit-master --purge
release "gerrit-master" deleted



# via https://github.com/helm/charts/tree/master/stable/nfs-server-provisioner
sudo helm install stable/nfs-server-provisioner --name nfs-server-prov
NAME:   nfs-server-prov
LAST DEPLOYED: Wed Mar 20 19:31:04 2019
NAMESPACE: default
STATUS: DEPLOYED
RESOURCES:
==> v1/Pod(related)
NAME                                      READY  STATUS             RESTARTS  AGE
nfs-server-prov-nfs-server-provisioner-0  0/1    ContainerCreating  0         0s
==> v1/StorageClass
NAME  PROVISIONER                                           AGE
nfs   cluster.local/nfs-server-prov-nfs-server-provisioner  0s
==> v1/ServiceAccount
NAME                                    SECRETS  AGE
nfs-server-prov-nfs-server-provisioner  1        0s
==> v1/ClusterRole
NAME                                    AGE
nfs-server-prov-nfs-server-provisioner  0s
==> v1/ClusterRoleBinding
NAME                                    AGE
nfs-server-prov-nfs-server-provisioner  0s
==> v1/Service
NAME                                    TYPE       CLUSTER-IP    EXTERNAL-IP  PORT(S)                                 AGE
nfs-server-prov-nfs-server-provisioner  ClusterIP  10.43.249.72  <none>       2049/TCP,20048/TCP,51413/TCP,51413/UDP  0s
==> v1beta2/StatefulSet
NAME                                    DESIRED  CURRENT  AGE
nfs-server-prov-nfs-server-provisioner  1        1        0s
NOTES:
The NFS Provisioner service has now been installed.
A storage class named 'nfs' has now been created
and is available to provision dynamic volumes.
You can use this storageclass by creating a `PersistentVolumeClaim` with the
correct storageClassName attribute. For example:
    ---
    kind: PersistentVolumeClaim
    apiVersion: v1
    metadata:
      name: test-dynamic-volume-claim
    spec:
      storageClassName: "nfs"
      accessModes:
        - ReadWriteOnce
      resources:
        requests:
          storage: 100Mi


default         nfs-server-prov-nfs-server-provisioner-0   1/1       Running     0          1m


kubectl describe pvc gerrit-master-gerrit-master-db-pvc 
Events:
  Warning  ProvisioningFailed  13s (x6 over 1m)  persistentvolume-controller  storageclass.storage.k8s.io "default" not found


# set creation to true under storageClass (default and shared)
create: true


# further
 ExternalProvisioning  3s (x2 over 18s)  persistentvolume-controller  waiting for a volume to be created, either by external provisioner "nfs" or manually created by system administrator




# need to do a detailed dive into SC provisioners


# i have this unbound PVC - because I have not created the NFS share yet via the prov
default     gerrit-master-git-filesystem-pvc       Pending                                       shared-storage   2m
# want this bound PVC+PV
inf         gerrit-var-gerrit-review-site      Bound     pvc-6d2c642b-c278-11e8-8679-f4034344e778   6Gi        RWX           nfs-sc   174d
pvc-6d2c642b-c278-11e8-8679-f4034344e778   6Gi        RWX           Delete          Bound     inf/gerrit-var-gerrit-review-site      nfs-sc             174d

Jenkins

Nexus

GoCD

GitLab

Baseline Testing

Verify your environment by installing the default mysql chart

ubuntu@ip-172-31-3-87:~$ sudo helm install --name mysqldb --set mysqlRootPassword=myrootpass,mysqlUser=myuser,mysqlPassword=mypass,mysqlDatqbase=mydb stable/mysq
NAME:   mysqldb
LAST DEPLOYED: Thu Mar 21 16:06:02 2019
NAMESPACE: default
STATUS: DEPLOYED
RESOURCES:
==> v1/ConfigMap
NAME          DATA  AGE
mysqldb-test  1     0s
==> v1/PersistentVolumeClaim
NAME     STATUS   VOLUME  CAPACITY  ACCESS MODES  STORAGECLASS  AGE
mysqldb  Pending  0s
==> v1/Service
NAME     TYPE       CLUSTER-IP    EXTERNAL-IP  PORT(S)   AGE
mysqldb  ClusterIP  10.43.186.39  <none>       3306/TCP  0s
==> v1beta1/Deployment
NAME     DESIRED  CURRENT  UP-TO-DATE  AVAILABLE  AGE
mysqldb  1        1        1           0          0s
==> v1/Pod(related)
NAME                     READY  STATUS   RESTARTS  AGE
mysqldb-979887bcf-4hf59  0/1    Pending  0         0s
==> v1/Secret
NAME     TYPE    DATA  AGE
mysqldb  Opaque  2     0s
NOTES:
MySQL can be accessed via port 3306 on the following DNS name from within your cluster:
mysqldb.default.svc.cluster.local
To get your root password run:
    MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace default mysqldb -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo)
To connect to your database:
1. Run an Ubuntu pod that you can use as a client:
    kubectl run -i --tty ubuntu --image=ubuntu:16.04 --restart=Never -- bash -il
2. Install the mysql client:
    $ apt-get update && apt-get install mysql-client -y
3. Connect using the mysql cli, then provide your password:
    $ mysql -h mysqldb -p
To connect to your database directly from outside the K8s cluster:
    MYSQL_HOST=127.0.0.1
    MYSQL_PORT=3306
    # Execute the following command to route the connection:
    kubectl port-forward svc/mysqldb 3306
    mysql -h ${MYSQL_HOST} -P${MYSQL_PORT} -u root -p${MYSQL_ROOT_PASSWORD}

Links

https://kubernetes.io/docs/concepts/storage/storage-classes/

Baseline Testing

Verify your environment by installing the default mysql chart

ubuntu@ip-172-31-3-87:~$ sudo helm install --name mysqldb --set mysqlRootPassword=myrootpass,mysqlUser=myuser,mysqlPassword=mypass,mysqlDatqbase=mydb stable/mysq
NAME:   mysqldb
LAST DEPLOYED: Thu Mar 21 16:06:02 2019
NAMESPACE: default
STATUS: DEPLOYED
RESOURCES:
==> v1/ConfigMap
NAME          DATA  AGE
mysqldb-test  1     0s
==> v1/PersistentVolumeClaim
NAME     STATUS   VOLUME  CAPACITY  ACCESS MODES  STORAGECLASS  AGE
mysqldb  Pending  0s
==> v1/Service
NAME     TYPE       CLUSTER-IP    EXTERNAL-IP  PORT(S)   AGE
mysqldb  ClusterIP  10.43.186.39  <none>       3306/TCP  0s
==> v1beta1/Deployment
NAME     DESIRED  CURRENT  UP-TO-DATE  AVAILABLE  AGE
mysqldb  1        1        1           0          0s
==> v1/Pod(related)
NAME                     READY  STATUS   RESTARTS  AGE
mysqldb-979887bcf-4hf59  0/1    Pending  0         0s
==> v1/Secret
NAME     TYPE    DATA  AGE
mysqldb  Opaque  2     0s
NOTES:
MySQL can be accessed via port 3306 on the following DNS name from within your cluster:
mysqldb.default.svc.cluster.local
To get your root password run:
    MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace default mysqldb -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo)
To connect to your database:
1. Run an Ubuntu pod that you can use as a client:
    kubectl run -i --tty ubuntu --image=ubuntu:16.04 --restart=Never -- bash -il
2. Install the mysql client:
    $ apt-get update && apt-get install mysql-client -y
3. Connect using the mysql cli, then provide your password:
    $ mysql -h mysqldb -p
To connect to your database directly from outside the K8s cluster:
    MYSQL_HOST=127.0.0.1
    MYSQL_PORT=3306
    # Execute the following command to route the connection:
    kubectl port-forward svc/mysqldb 3306
    mysql -h ${MYSQL_HOST} -P${MYSQL_PORT} -u root -p${MYSQL_ROOT_PASSWORD}

DevOps

Kubernetes Cluster Install

Follow RKE setup OOM RKE Kubernetes Deployment#Quickstart

Kubernetes Services

Namespaces

Create a specific namespace

https://kubernetes.io/docs/tasks/administer-cluster/namespaces-walkthrough/

vi namespace-dev.json
{
  "kind": "Namespace",
  "apiVersion": "v1",
  "metadata": {
    "name": "dev",
    "labels": {
      "name": "dev"
    }
  }
}
ubuntu@ip-172-31-30-234:~/helm/book$ kubectl create -f namespace-dev.json 
namespace/dev created
ubuntu@ip-172-31-30-234:~/helm/book$ kubectl get namespaces --show-labels
NAME            STATUS    AGE       LABELS
default         Active    5d        <none>
dev             Active    44s       name=dev

Contexts

ubuntu@ip-172-31-30-234:~/helm/book$ sudo kubectl config set-context dev --namespace=dev --cluster=local --user=local
Context "dev" created.
ubuntu@ip-172-31-30-234:~/helm/book$ sudo kubectl config use-context dev
Switched to context "dev".

Storage

Volumes

https://kubernetes.io/docs/concepts/storage/volumes/

hostPath

https://kubernetes.io/docs/tasks/configure-pod-container/configure-persistent-volume-storage/

Persistent Volumes

kind: PersistentVolume
apiVersion: v1
metadata:
  name: task-pv-volume
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/home/ubuntu/tools-data1"

ubuntu@ip-172-31-30-234:~/helm/book$ kubectl create -f hostpath-volume.yaml -n dev
persistentvolume/task-pv-volume created
ubuntu@ip-172-31-30-234:~/helm/book$ kubectl get pv 
NAME             CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM     STORAGECLASS   REASON    AGE
task-pv-volume   5Gi        RWO            Retain           Available             manual                   2m

Persistent Volume Claims

https://kubernetes.io/docs/tasks/configure-pod-container/configure-persistent-volume-storage/#create-a-persistentvolumeclaim

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: task-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi

ubuntu@ip-172-31-30-234:~/helm/book$ kubectl create -f hostpath-pvc.yaml -n dev
persistentvolumeclaim/task-pv-claim created


# check bound status
ubuntu@ip-172-31-30-234:~/helm/book$ kubectl get pv 
NAME             CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS    CLAIM               STORAGECLASS   REASON    AGE
task-pv-volume   5Gi        RWO            Retain           Bound     dev/task-pv-claim   manual                   7m

ubuntu@ip-172-31-30-234:~/helm/book$ kubectl get pvc -n dev
NAME            STATUS    VOLUME           CAPACITY   ACCESS MODES   STORAGECLASS   AGE
task-pv-claim   Bound     task-pv-volume   5Gi        RWO            manual         1m


vi pv-pod.yaml


kind: Pod
apiVersion: v1
metadata:
  name: task-pv-pod
spec:
  volumes:
    - name: task-pv-storage
      persistentVolumeClaim:
       claimName: task-pv-claim
  containers:
    - name: task-pv-container
      image: nginx
      ports:
        - containerPort: 80
          name: "http-server"
      volumeMounts:
        - mountPath: "/usr/share/nginx/html"
          name: task-pv-storage

ubuntu@ip-172-31-30-234:~/helm/book$ kubectl create -f pv-pod.yaml -n dev
pod/task-pv-pod created


ubuntu@ip-172-31-30-234:~/helm/book$ kubectl get pods -n dev
NAME          READY     STATUS    RESTARTS   AGE
task-pv-pod   1/1       Running   0          53s


# test
ubuntu@ip-172-31-30-234:~$ vi tools-data1/index.html
ubuntu@ip-172-31-30-234:~/helm/book$ kubectl exec -it task-pv-pod -n dev bash
root@task-pv-pod:/# apt-get update; 
apt-get install curl
root@task-pv-pod:/# curl localhost
hello world

Storage Classes

https://kubernetes.io/docs/concepts/storage/storage-classes/

Design Issues

DI 0: Raw Docker Gerrit Container for reference

https://gerrit.googlesource.com/docker-gerrit/

sudo docker run -ti -d -p 8080:8080 -p 29418:29418 gerritcodereview/gerrit
ubuntu@ip-172-31-15-176:~$ sudo docker ps
CONTAINER ID        IMAGE                     COMMAND                  CREATED             STATUS              PORTS                                              NAMES
83cfd4a6492e        gerritcodereview/gerrit   "/bin/sh -c 'git con…"   3 minutes ago       Up 3 minutes        0.0.0.0:8080->8080/tcp, 0.0.0.0:29418->29418/tcp   nifty_einstein
# check http://localhost:8080

Links

https://kubernetes.io/docs/concepts/storage/storage-classes/

Infrastructure

Gerrit

Replication

Helm Charts

Triage

Jenkins

Nexus

GoCD

GitLab

Links

DevOps

Kubernetes Cluster Install

Kubernetes Services

Namespaces

Contexts

Storage

Volumes

hostPath

Persistent Volumes

Persistent Volume Claims

Storage Classes

Design Issues

DI 0: Raw Docker Gerrit Container for reference

Links