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Kubernetes best practices:

Browse Source 
* put many configurations in one file
* expose services before you start pods

See: https://kubernetes.io/docs/concepts/configuration/overview/
This commit is contained in:
Robert Schäfer 2019-02-01 01:25:05 +01:00
parent e8b212f5cc
commit 9b5f88d7ac
5 changed files with 193 additions and 166 deletions
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13
README.md
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@ -57,7 +57,13 @@ $ kubectl apply -f secrets.yml
```shell
$ kubectl apply -f volumes/
```
Wait until the persistent volumes get available.
## Expose the services
```shell
$ kubectl apply -f services/
```
Wait until persistent volumes and services become available.
## Create deployments
```shell
@ -68,11 +74,6 @@ Sit back and relax and have a look into your kubernetes dashboard.
Wait until all pods turn green and they don't show a warning
`Waiting: ContainerCreating` anymore.
## Expose the services
```shell
$ kubectl apply -f services/
```
## Access the services

172
deployments/db-migration-worker.yml
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@ -1,75 +1,101 @@
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: nitro-db-migration-worker
namespace: staging
spec:
replicas: 1
minReadySeconds: 15
progressDeadlineSeconds: 60
selector:
matchLabels:
workload.user.cattle.io/workloadselector: deployment-staging-db-migration-worker
template:
metadata:
labels:
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: nitro-db-migration-worker
namespace: staging
spec:
replicas: 1
minReadySeconds: 15
progressDeadlineSeconds: 60
selector:
matchLabels:
workload.user.cattle.io/workloadselector: deployment-staging-db-migration-worker
name: "nitro-db-migration-worker"
spec:
containers:
- env:
- name: SSH_USERNAME
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: SSH_USERNAME
- name: SSH_HOST
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: SSH_HOST
- name: MONGODB_USERNAME
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: MONGODB_USERNAME
- name: MONGODB_AUTH_DB
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: MONGODB_AUTH_DB
- name: MONGODB_DATABASE
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: MONGODB_DATABASE
- name: UPLOADS_DIRECTORY
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: UPLOADS_DIRECTORY
- name: MONGODB_PASSWORD
valueFrom:
secretKeyRef:
name: staging
key: MONGODB_PASSWORD
optional: false
image: humanconnection/db-migration-worker:latest
template:
metadata:
labels:
workload.user.cattle.io/workloadselector: deployment-staging-db-migration-worker
name: nitro-db-migration-worker
resources: {}
imagePullPolicy: Always
volumeMounts:
- mountPath: /root/
name: ssh-keys-directory
- mountPath: /mongo-export/
name: mongo-export
restartPolicy: Always
volumes:
- name: ssh-keys-directory
persistentVolumeClaim:
claimName: ssh-keys-claim
- name: mongo-export
persistentVolumeClaim:
claimName: mongo-export-claim
terminationGracePeriodSeconds: 30
status: {}
spec:
containers:
- env:
- name: SSH_USERNAME
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: SSH_USERNAME
- name: SSH_HOST
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: SSH_HOST
- name: MONGODB_USERNAME
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: MONGODB_USERNAME
- name: MONGODB_AUTH_DB
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: MONGODB_AUTH_DB
- name: MONGODB_DATABASE
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: MONGODB_DATABASE
- name: UPLOADS_DIRECTORY
valueFrom:
configMapKeyRef:
name: staging-db-migration-worker
key: UPLOADS_DIRECTORY
- name: MONGODB_PASSWORD
valueFrom:
secretKeyRef:
name: staging
key: MONGODB_PASSWORD
optional: false
image: humanconnection/db-migration-worker:latest
name: nitro-db-migration-worker
resources: {}
imagePullPolicy: Always
volumeMounts:
- mountPath: /root/
name: ssh-keys-directory
- mountPath: /mongo-export/
name: mongo-export
restartPolicy: Always
volumes:
- name: ssh-keys-directory
persistentVolumeClaim:
claimName: ssh-keys-claim
- name: mongo-export
persistentVolumeClaim:
claimName: mongo-export-claim
terminationGracePeriodSeconds: 30
status: {}
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: ssh-keys-volume
namespace: staging
spec:
accessModes:
- ReadWriteOnce
capacity:
storage: 1Mi
hostPath:
path: /data/pv0001/
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: ssh-keys-claim
namespace: staging
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Mi

144
deployments/neo4j.yml
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@ -1,59 +1,89 @@
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: nitro-neo4j
namespace: staging
spec:
replicas: 1
strategy: {}
selector:
matchLabels:
workload.user.cattle.io/workloadselector: deployment-staging-neo4j
template:
metadata:
labels:
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: nitro-neo4j
namespace: staging
spec:
replicas: 1
strategy: {}
selector:
matchLabels:
workload.user.cattle.io/workloadselector: deployment-staging-neo4j
name: "nitro-neo4j"
spec:
containers:
- env:
- name: NEO4J_apoc_import_file_enabled
value: "true"
- name: NEO4J_dbms_memory_pagecache_size
value: 1G
- name: NEO4J_dbms_memory_heap_max__size
value: 1G
- name: NEO4J_AUTH
value: none
- name: NEO4J_URI
valueFrom:
configMapKeyRef:
name: staging-neo4j
key: NEO4J_URI
- name: NEO4J_USER
valueFrom:
configMapKeyRef:
name: staging-neo4j
key: NEO4J_USER
- name: NEO4J_AUTH
valueFrom:
configMapKeyRef:
name: staging-neo4j
key: NEO4J_AUTH
image: humanconnection/neo4j:latest
template:
metadata:
labels:
workload.user.cattle.io/workloadselector: deployment-staging-neo4j
name: nitro-neo4j
ports:
- containerPort: 7687
- containerPort: 7474
# - containerPort: 7473
resources: {}
imagePullPolicy: IfNotPresent
volumeMounts:
- mountPath: /mongo-export/
name: mongo-export
restartPolicy: Always
volumes:
- name: mongo-export
persistentVolumeClaim:
claimName: mongo-export-claim
status: {}
spec:
containers:
- env:
- name: NEO4J_apoc_import_file_enabled
value: "true"
- name: NEO4J_dbms_memory_pagecache_size
value: 1G
- name: NEO4J_dbms_memory_heap_max__size
value: 1G
- name: NEO4J_AUTH
value: none
- name: NEO4J_URI
valueFrom:
configMapKeyRef:
name: staging-neo4j
key: NEO4J_URI
- name: NEO4J_USER
valueFrom:
configMapKeyRef:
name: staging-neo4j
key: NEO4J_USER
- name: NEO4J_AUTH
valueFrom:
configMapKeyRef:
name: staging-neo4j
key: NEO4J_AUTH
image: humanconnection/neo4j:latest
name: nitro-neo4j
ports:
- containerPort: 7687
- containerPort: 7474
resources: {}
imagePullPolicy: IfNotPresent
volumeMounts:
- mountPath: /data/
name: neo4j-data
- mountPath: /mongo-export/
name: mongo-export
restartPolicy: Always
volumes:
- name: mongo-export
persistentVolumeClaim:
claimName: mongo-export-claim
- name: neo4j-data
persistentVolumeClaim:
claimName: neo4j-data-claim
status: {}
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: neo4j-data-volume
namespace: staging
spec:
accessModes:
- ReadWriteOnce
capacity:
storage: 4Gi
hostPath:
path: /data/neo4j/
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: neo4j-data-claim
namespace: staging
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 4Gi

5
deployments/web.yml
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@ -7,11 +7,6 @@ spec:
replicas: 2
minReadySeconds: 15
progressDeadlineSeconds: 60
# strategy:
# rollingUpdate:
# maxSurge: 1
# maxUnavailable: 0
# type: RollingUpdate
selector:
matchLabels:
workload.user.cattle.io/workloadselector: deployment-staging-web

25
volumes/ssh-keys.yml
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@ -1,25 +0,0 @@
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: ssh-keys-volume
namespace: staging
spec:
accessModes:
- ReadWriteOnce
capacity:
storage: 1Mi
hostPath:
path: /data/pv0001/
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: ssh-keys-claim
namespace: staging
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Mi