Let's try this theory using this practical example, we have updated our statefulset definition file with the following Kubernetes Securit圜ontext Capabilities field. Now you may wonder that by using privileged as true enables all the privilege so just by making it false, the pod should execute as no-privilege?
What is kubernetes context how to#
How to create a non-privileged container inside a Kubernetes Pod This YAML file expects the respective Pod Security Policy has allowed all capabilities. In some cases, if you don't see all the capabilities added to your container then you can use below Kubernetes Securit圜ontext Capabilities. ]# kubectl exec -it test-statefulset-0 -n testns - capsh -printĬurrent: = cap_chown,cap_dac_override,cap_dac_read_search,cap_fowner,cap_fsetid,cap_kill,cap_setgid,cap_setuid,cap_setpcap,cap_linux_immutable,cap_net_bind_service,cap_net_broadcast,cap_net_admin,cap_net_raw,cap_ipc_lock,cap_ipc_owner,cap_sys_module,cap_sys_rawio,cap_sys_chroot,cap_sys_ptrace,cap_sys_pacct,cap_sys_admin,cap_sys_boot,cap_sys_nice,cap_sys_resource,cap_sys_time,cap_sys_tty_config,cap_mknod,cap_lease,cap_audit_write,cap_audit_control,cap_setfcap,cap_mac_override,cap_mac_admin,cap_syslog,35,36,37+iīounding set = cap_chown,cap_dac_override,cap_dac_read_search,cap_fowner,cap_fsetid,cap_kill,cap_setgid,cap_setuid,cap_setpcap,cap_linux_immutable,cap_net_bind_service,cap_net_broadcast,cap_net_admin,cap_net_raw,cap_ipc_lock,cap_ipc_owner,cap_sys_module,cap_sys_rawio,cap_sys_chroot,cap_sys_ptrace,cap_sys_pacct,cap_sys_admin,cap_sys_boot,cap_sys_nice,cap_sys_resource,cap_sys_time,cap_sys_tty_config,cap_mknod,cap_lease,cap_audit_write,cap_audit_control,cap_setfcap,cap_mac_override,cap_mac_admin,cap_syslog,35,36,37Īs you can see, all the capabilities are allowed in our container. Statefulset.apps/test-statefulset created Image: golinux-registry:8090/secure-context-img:latestĬommand: Ĭreate this statefulset: ]# kubectl create -f test-statefulset.yaml In most of the cases following Kubernetes Securit圜ontext Capability definition should be enough to start a privileged pod: apiVersion: apps/v1 In this example first we will create a privileged pod which should have all the capabilities. How to create a privileged container inside a Kubernetes Pod In our Pod Security Policy we have not added any restrictions and everything is allowed basically. Testns-psp-01 false * RunAsAny MustRunAsNonRoot RunAsAny RunAsAny false * NAME PRIV CAPS SELINUX RUNASUSER FSGROUP SUPGROUP READONLYROOTFS VOLUMES
What is kubernetes context psp#
Here is the output of my installed PSP: ]# kubectl get psp | grep -E 'PRIV|testns' Here is my PSP definition file along with Cluster Role and Cluster Role Binding:. Then we will explore Kubernetes Securit圜ontext Capabilities in detail with multiple examples covering different scenarios.įirst we will create our Pod Security Policy which we will use through out this article. In this tutorial we will give a brief overview on Pod Security Policy (for detailed understanding on PSP you can read my older article Create Pod Security Policy Kubernetes ). Later we use these policies with PSP (Pod Security Policy) to map the Pods and control the privilege. The Kubernetes Securit圜ontext Capabilities is tightly coupled with Pod Security Policy which defines the policy for the entire cluster. We can utilize Kubernetes Securit圜ontext Capabilities to add or remove Linux Capabilities from the Pod and Container so the container can be made more secure from any kind of intrusion. With Kubernetes you can control the level of privilege assigned to each Pod and container. Kubernetes Securit圜ontext Capabilities Introduction
How to create a non-privileged container inside a Kubernetes Pod.How to create a privileged container inside a Kubernetes Pod.Kubernetes Securit圜ontext Capabilities Introduction.
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