Systemd units, limits, and bin path fixes

* Add restart for weave service unit
* Reuse docker_bin_dir everythere
* Limit systemd managed docker containers by CPU/RAM. Do not configure native
  systemd limits due to the lack of consensus in the kernel community
  requires out-of-tree kernel patches.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

roles/kubernetes-apps/ansible/defaults/main.yml

@@ -20,6 +20,12 @@ exechealthz_image_tag: "{{ exechealthz_version }}"
 calico_policy_image_repo: "calico/kube-policy-controller"
 calico_policy_image_tag: latest
 
+# Limits for calico apps
+calico_policy_controller_cpu_limit: 100m
+calico_policy_controller_memory_limit: 256M
+calico_policy_controller_cpu_requests: 30m
+calico_policy_controller_memory_requests: 128M
+
 # Netchecker
 deploy_netchecker: false
 netchecker_port: 31081
@@ -29,5 +35,19 @@ agent_img: "quay.io/l23network/mcp-netchecker-agent:v0.1"
 server_img: "quay.io/l23network/mcp-netchecker-server:v0.1"
 kubectl_image: "gcr.io/google_containers/kubectl:v0.18.0-120-gaeb4ac55ad12b1-dirty"
 
+# Limits for netchecker apps
+netchecker_agent_cpu_limit: 30m
+netchecker_agent_memory_limit: 100M
+netchecker_agent_cpu_requests: 15m
+netchecker_agent_memory_requests: 64M
+netchecker_server_cpu_limit: 100m
+netchecker_server_memory_limit: 256M
+netchecker_server_cpu_requests: 50m
+netchecker_server_memory_requests: 128M
+netchecker_kubectl_cpu_limit: 30m
+netchecker_kubectl_memory_limit: 128M
+netchecker_kubectl_cpu_requests: 15m
+netchecker_kubectl_memory_requests: 64M
+
 # SSL
 etcd_cert_dir: "/etc/ssl/etcd/ssl"

roles/kubernetes-apps/ansible/templates/calico-policy-controller.yml.j2

@@ -25,6 +25,13 @@ spec:
         - name: calico-policy-controller
           image: {{ calico_policy_image_repo }}:{{ calico_policy_image_tag }}
           imagePullPolicy: {{ k8s_image_pull_policy }}
+          resources:
+            limits:
+              cpu: {{ calico_policy_controller_cpu_limit }}
+              memory: {{ calico_policy_controller_memory_limit }}
+            requests:
+              cpu: {{ calico_policy_controller_cpu_requests }}
+              memory: {{ calico_policy_controller_memory_requests }}
           env:
             - name: ETCD_ENDPOINTS
               value: "{{ etcd_access_endpoint }}"

roles/kubernetes-apps/ansible/templates/netchecker-agent-ds.yml

@@ -23,3 +23,10 @@ spec:
             - name: REPORT_INTERVAL
               value: '{{ agent_report_interval }}'
           imagePullPolicy: {{ k8s_image_pull_policy }}
+          resources:
+            limits:
+              cpu: {{ netchecker_agent_cpu_limit }}
+              memory: {{ netchecker_agent_memory_limit }}
+            requests:
+              cpu: {{ netchecker_agent_cpu_requests }}
+              memory: {{ netchecker_agent_memory_requests }}

roles/kubernetes-apps/ansible/templates/netchecker-agent-hostnet-ds.yml

@@ -24,3 +24,10 @@ spec:
             - name: REPORT_INTERVAL
               value: '{{ agent_report_interval }}'
           imagePullPolicy: {{ k8s_image_pull_policy }}
+          resources:
+            limits:
+              cpu: {{ netchecker_agent_cpu_limit }}
+              memory: {{ netchecker_agent_memory_limit }}
+            requests:
+              cpu: {{ netchecker_agent_cpu_requests }}
+              memory: {{ netchecker_agent_memory_requests }}

roles/kubernetes-apps/ansible/templates/netchecker-server-pod.yml

@@ -11,11 +11,25 @@ spec:
       image: "{{ server_img }}"
       env:
       imagePullPolicy: {{ k8s_image_pull_policy }}
+      resources:
+        limits:
+          cpu: {{ netchecker_server_cpu_limit }}
+          memory: {{ netchecker_server_memory_limit }}
+        requests:
+          cpu: {{ netchecker_server_cpu_requests }}
+          memory: {{ netchecker_server_memory_requests }}
       ports:
         - containerPort: 8081
           hostPort: 8081
     - name: kubectl-proxy
       image: "{{ kubectl_image }}"
       imagePullPolicy: {{ k8s_image_pull_policy }}
+      resources:
+        limits:
+          cpu: {{ netchecker_kubectl_cpu_limit }}
+          memory: {{ netchecker_kubectl_memory_limit }}
+        requests:
+          cpu: {{ netchecker_kubectl_cpu_requests }}
+          memory: {{ netchecker_kubectl_memory_requests }}
       args:
         - proxy