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Merge pull request #1571 from matburt/fixing_cluster_resources
Fixing some issues defining resource requests in openshift and k8s
This commit is contained in:
Matthew Jones
GitHub
commit
3928f536d8
18
INSTALL.md
18
INSTALL.md
@ -117,6 +117,15 @@ To complete a deployment to OpenShift, you will obviously need access to an Open
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You will also need to have the `oc` command in your PATH. The `install.yml` playbook will call out to `oc` when logging into, and creating objects on the cluster.
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The default resource requests per-pod requires:
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> Memory: 6GB
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> CPU: 3 cores
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This can be tuned by overriding the variables found in [/installer/openshift/defaults/main.yml](/installer/openshift/defaults/main.yml). Special care should be taken when doing this as undersized instances will experience crashes and resource exhaustion.
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For more detail on how resource requests are formed see: [https://docs.openshift.com/container-platform/latest/dev_guide/compute_resources.html#dev-compute-resources](https://docs.openshift.com/container-platform/latest/dev_guide/compute_resources.html#dev-compute-resources)
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#### Deploying to Minishift
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Install Minishift by following the [installation guide](https://docs.openshift.org/latest/minishift/getting-started/installing.html).
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@ -289,6 +298,15 @@ A Kubernetes deployment will require you to have access to a Kubernetes cluster
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The installation program will reference `kubectl` directly. `helm` is only necessary if you are letting the installer configure PostgreSQL for you.
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The default resource requests per-pod requires:
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> Memory: 6GB
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> CPU: 3 cores
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This can be tuned by overriding the variables found in [/installer/kubernetes/defaults/main.yml](/installer/kubernetes[/defaults/main.yml). Special care should be taken when doing this as undersized instances will experience crashes and resource exhaustion.
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For more detail on how resource requests are formed see: [https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/](https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/)
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### Pre-build steps
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Before starting the build process, review the [inventory](./installer/inventory) file, and uncomment and provide values for the following variables found in the `[all:vars]` section uncommenting when necessary. Make sure the openshift and standalone docker sections are commented out:
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12
installer/kubernetes/defaults/main.yml
Normal file
12
installer/kubernetes/defaults/main.yml
Normal file
@ -0,0 +1,12 @@
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---
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awx_web_mem_request: 1
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awx_web_cpu_request: 500
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awx_task_mem_request: 2
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awx_task_cpu_request: 1500
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awx_rabbitmq_mem_request: 2
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awx_rabbitmq_cpu_request: 500
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awx_memcached_mem_request: 1
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awx_memcached_cpu_request: 500
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@ -16,8 +16,8 @@ data:
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# Automatically deprovision pods that go offline
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AWX_AUTO_DEPROVISION_INSTANCES = True
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SYSTEM_TASK_ABS_CPU = {{ ((awx_task_cpu_request|default(1500) / 1000) * 4)|int }}
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SYSTEM_TASK_ABS_MEM = {{ ((awx_task_mem_request|default(2) * 1024) / 100)|int }}
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SYSTEM_TASK_ABS_CPU = {{ ((awx_task_cpu_request|int / 1000) * 4)|int }}
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SYSTEM_TASK_ABS_MEM = {{ ((awx_task_mem_request|int * 1024) / 100)|int }}
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#Autoprovisioning should replace this
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CLUSTER_HOST_ID = socket.gethostname()
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@ -23,8 +23,8 @@ spec:
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name: awx-application-config
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resources:
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requests:
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memory: "1Gi"
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cpu: "500m"
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memory: "{{ awx_web_mem_request }}Gi"
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cpu: "{{ awx_web_cpu_request }}m"
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- name: awx-celery
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image: {{ awx_task_kubernetes_image }}
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imagePullPolicy: Always
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@ -52,11 +52,8 @@ spec:
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value: {{ default_admin_password|default('password') }}
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resources:
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requests:
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memory: "{{ awx_task_cpu_request|default('2') }}Gi"
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cpu: "{{ awx_task_mem_request|default('1500') }}m"
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limit:
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memory: "{{ awx_task_cpu_request|default('2') }}Gi"
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cpu: "{{ awx_task_mem_request|default('1500') }}m"
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memory: "{{ awx_task_mem_request }}Gi"
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cpu: "{{ awx_task_cpu_request }}m"
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- name: awx-rabbit
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image: ansible/awx_rabbitmq:{{ rabbitmq_version }}
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imagePullPolicy: Always
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@ -96,14 +93,14 @@ spec:
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value: "/etc/rabbitmq/rabbitmq"
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resources:
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requests:
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memory: "2Gi"
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cpu: "500m"
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memory: "{{ awx_rabbitmq_mem_request }}Gi"
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cpu: "{{ awx_rabbitmq_cpu_request }}m"
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- name: awx-memcached
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image: memcached
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resources:
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requests:
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memory: "1Gi"
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cpu: "500m"
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memory: "{{ awx_memcached_mem_request }}Gi"
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cpu: "{{ awx_memcached_cpu_request }}m"
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volumes:
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- name: awx-application-config
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configMap:
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12
installer/openshift/defaults/main.yml
Normal file
12
installer/openshift/defaults/main.yml
Normal file
@ -0,0 +1,12 @@
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---
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awx_web_mem_request: 1
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awx_web_cpu_request: 500
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awx_task_mem_request: 2
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awx_task_cpu_request: 1500
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awx_rabbitmq_mem_request: 2
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awx_rabbitmq_cpu_request: 500
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awx_memcached_mem_request: 1
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awx_memcached_cpu_request: 500
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@ -16,8 +16,8 @@ data:
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# Automatically deprovision pods that go offline
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AWX_AUTO_DEPROVISION_INSTANCES = True
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SYSTEM_TASK_ABS_CPU = {{ ((awx_task_cpu_request|default(1500) / 1000) * 4)|int }}
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SYSTEM_TASK_ABS_MEM = {{ ((awx_task_mem_request|default(2) * 1024) / 100)|int }}
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SYSTEM_TASK_ABS_CPU = {{ ((awx_task_cpu_request|int / 1000) * 4)|int }}
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SYSTEM_TASK_ABS_MEM = {{ ((awx_task_mem_request|int * 1024) / 100)|int }}
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#Autoprovisioning should replace this
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CLUSTER_HOST_ID = socket.gethostname()
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@ -23,8 +23,8 @@ spec:
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name: awx-application-config
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resources:
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requests:
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memory: "1Gi"
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cpu: "500m"
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memory: "{{ awx_web_mem_request }}Gi"
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cpu: "{{ awx_web_cpu_request }}m"
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- name: awx-celery
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image: {{ awx_task_openshift_image }}
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imagePullPolicy: Always
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@ -52,11 +52,8 @@ spec:
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value: {{ default_admin_password|default('password') }}
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resources:
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requests:
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memory: "{{ awx_task_cpu_request|default('2') }}Gi"
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cpu: "{{ awx_task_mem_request|default('1500') }}m"
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limit:
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memory: "{{ awx_task_cpu_request|default('2') }}Gi"
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cpu: "{{ awx_task_mem_request|default('1500') }}m"
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memory: "{{ awx_task_mem_request }}Gi"
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cpu: "{{ awx_task_cpu_request }}m"
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- name: awx-rabbit
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image: ansible/awx_rabbitmq:{{ rabbitmq_version }}
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imagePullPolicy: Always
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@ -94,14 +91,14 @@ spec:
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value: "/etc/rabbitmq/rabbitmq"
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resources:
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requests:
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memory: "2Gi"
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cpu: "500m"
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memory: "{{ awx_rabbitmq_mem_request }}Gi"
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cpu: "{{ awx_rabbitmq_cpu_request }}m"
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- name: awx-memcached
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image: memcached
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resources:
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requests:
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memory: "1Gi"
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cpu: "500m"
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memory: "{{ awx_memcached_mem_request }}Gi"
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cpu: "{{ awx_memcached_cpu_request }}m"
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volumes:
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- name: awx-application-config
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configMap:
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