Pause containers

Pause containersΒΆ

Every Kubernetes pod includes an empty pause container, which bootstraps the pod to establish all of the cgroups, reservations, and namespaces before its individual containers are created. The pause container image is always present, so the pod resource allocation happens instantaneously as containers are created.

Pause containers are hidden by default. To display pause containers:

docker ps -a | grep -I pause

Example of system response:

8c9707885bf6   dockereng/ucp-pause:3.0.0-6d332d3   "/pause"  47 hours ago   Up 47 hours   k8s_POD_calico-kube-controllers-559f6948dc-5c84l_kube-system_d00e5130-1bf4-11e8-b426-0242ac110011_0
258da23abbf5   dockereng/ucp-pause:3.0.0-6d332d3   "/pause"  47 hours ago   Up 47 hours   k8s_POD_kube-dns-6d46d84946-tqpzr_kube-system_d63acec6-1bf4-11e8-b426-0242ac110011_0
2e27b5d31a06   dockereng/ucp-pause:3.0.0-6d332d3   "/pause"  47 hours ago   Up 47 hours   k8s_POD_compose-698cf787f9-dxs29_kube-system_d5866b3c-1bf4-11e8-b426-0242ac110011_0
5d96dff73458   dockereng/ucp-pause:3.0.0-6d332d3   "/pause"  47 hours ago   Up 47 hours   k8s_POD_calico-node-4fjgv_kube-system_d043a0ea-1bf4-11e8-b426-0242ac110011_0