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EIO-246: add 2.3.5, update hardening guide and self-assessment

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Nelson Roberts
2020-02-12 16:00:58 -07:00
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Hardening Guide Version | Rancher Version | CIS Benchmark Version | Kubernetes Version Hardening Guide Version | Rancher Version | CIS Benchmark Version | Kubernetes Version
------------------------|----------------|-----------------------|------------------ ------------------------|----------------|-----------------------|------------------
[Hardening Guide v2.3.4]({{<baseurl>}}/rancher/v2.x/en/security/hardening-2.3.4/) | Rancher v2.3.4 | Benchmark v1.5 | Kubernetes v1.15 [Hardening Guide v2.3.5]({{<baseurl>}}/rancher/v2.x/en/security/hardening-2.3.5/) | Rancher v2.3.5 | Benchmark v1.5 | Kubernetes v1.15
[Hardening Guide v2.3.3]({{<baseurl>}}/rancher/v2.x/en/security/hardening-2.3.3/) | Rancher v2.3.3 | Benchmark v1.4.1 | Kubernetes v1.14, v1.15, and v1.16 [Hardening Guide v2.3.3]({{<baseurl>}}/rancher/v2.x/en/security/hardening-2.3.3/) | Rancher v2.3.3 | Benchmark v1.4.1 | Kubernetes v1.14, v1.15, and v1.16
[Hardening Guide v2.3]({{<baseurl>}}/rancher/v2.x/en/security/hardening-2.3/) | Rancher v2.3.0-v2.3.2 | Benchmark v1.4.1 | Kubernetes v1.15 [Hardening Guide v2.3]({{<baseurl>}}/rancher/v2.x/en/security/hardening-2.3/) | Rancher v2.3.0-v2.3.2 | Benchmark v1.4.1 | Kubernetes v1.15
[Hardening Guide v2.2]({{<baseurl>}}/rancher/v2.x/en/security/hardening-2.2/) | Rancher v2.2.x | Benchmark v1.4.1 and 1.4.0 | Kubernetes v1.13 [Hardening Guide v2.2]({{<baseurl>}}/rancher/v2.x/en/security/hardening-2.2/) | Rancher v2.2.x | Benchmark v1.4.1 and 1.4.0 | Kubernetes v1.13
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---
title: Hardening Guide v2.3.4
weight: 100
---
This document provides prescriptive guidance for hardening a production installation of Rancher v2.3.4. It outlines the configurations and controls required to address Kubernetes benchmark controls from the Center for Information Security (CIS).
> This hardening guide describes how to secure the nodes in your cluster, and it is recommended to follow this guide before installing Kubernetes.
This hardening guide is intended to be used with specific versions of the CIS Kubernetes Benchmark, Kubernetes, and Rancher:
Hardening Guide Version | Rancher Version | CIS Benchmark Version | Kubernetes Version
------------------------|----------------|-----------------------|------------------
Hardening Guide v2.3.4 | Rancher v2.3.4 | Benchmark v1.5 | Kubernetes 1.15
[Click here to download a PDF version of this document](https://releases.rancher.com/documents/security/2.3.4/Rancher_Hardening_Guide.pdf)
### Overview
This document provides prescriptive guidance for hardening a production installation of Rancher v2.3.4 with Kubernetes v1.15. It outlines the configurations required to address Kubernetes benchmark controls from the Center for Information Security (CIS).
For more detail about evaluating a hardened cluster against the official CIS benchmark, refer to the [CIS Benchmark Rancher Self-Assessment Guide - Rancher v2.3.4]({{< baseurl >}}/rancher/v2.x/en/security/benchmark-2.3.4/).
### Configure Kernel Runtime Parameters
The folowing `sysctl` configuration is recommended for all nodes type in the cluster. Set the following parameters in `/etc/sysctl.d/90-kubelet.conf`:
``` bash
vm.overcommit_memory=1
vm.panic_on_oom=0
kernel.panic=10
kernel.panic_on_oops=1
kernel.keys.root_maxkeys=1000000
kernel.keys.root_maxbytes=25000000
```
Run `sysctl -p /etc/sysctl.d/90-kubelet.conf` to enable the settings.
### Configuration Files and Permissions.
#### kubelet.conf
**path**: /etc/sysctl.d/kubelet.conf
**owner**: root:root
**permissions:** 0644
**contents**:
``` text
vm.overcommit_memory=1
kernel.panic=10
kernel.panic_on_oops=1
```
#### admission.yaml
**path**: /opt/kubernetes/admission.yaml
**owner**: root:root
**permissions**: 0600
**content**:
``` yaml
apiVersion: apiserver.k8s.io/v1alpha1
kind: AdmissionConfiguration
plugins:
- name: EventRateLimit
path: /opt/kubernetes/event.yaml
```
#### event.yaml
**path**: /opt/kubernetes/event.yaml
**owner**: root:root
**permissions**: 0600
**content**:
``` yaml
apiVersion: eventratelimit.admission.k8s.io/v1alpha1
kind: Configuration
limits:
- type: Server
qps: 5000
burst: 20000
```
#### encryption.yaml
**path**: /opt/kubernetes/encryption.yaml
**owner**: root:root
**permissions**: 0600
**content**:
``` yaml
apiVersion: apiserver.config.k8s.io/v1
kind: EncryptionConfiguration
resources:
- resources:
- secrets
providers:
- aescbc:
keys:
- name: key1
secret: <BASE 64 ENCODED SECRET>
- identity: {}
```
#### audit.yaml
**path**: /opt/kubernetes/audit.yaml
**owner**: root:root
**permissions**: 0600
**content**:
``` yaml
apiVersion: audit.k8s.io/v1beta1
kind: Policy
rules:
- level: Metadata
```
### Configure `etcd` user and `data-dir` permissions
#### create `etcd` user and `group`
```
addgroup --gid 52034 etcd
useradd --comment "etcd service account" --uid 52034 --gid 52034 etcd
```
#### create `data-dir` and set permissions
```
mkdir -p /var/lib/etcd && chown etcd.etcd /var/lib/etcd && chmod 0700 /var/lib/etcd
```
### Hardened RKE `config.yml` configuration
``` yaml
#
# Cluster Config
#
docker_root_dir: /var/lib/docker
enable_cluster_alerting: false
enable_cluster_monitoring: false
enable_network_policy: false
#
# Rancher Config
#
rancher_kubernetes_engine_config:
addon_job_timeout: 30
addons: |-
---
apiVersion: v1
kind: Namespace
metadata:
name: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: default-psp-role
namespace: ingress-nginx
rules:
- apiGroups:
- extensions
resourceNames:
- default-psp
resources:
- podsecuritypolicies
verbs:
- use
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: default-psp-rolebinding
namespace: ingress-nginx
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: default-psp-role
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:serviceaccounts
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:authenticated
---
apiVersion: v1
kind: Namespace
metadata:
name: cattle-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: default-psp-role
namespace: cattle-system
rules:
- apiGroups:
- extensions
resourceNames:
- default-psp
resources:
- podsecuritypolicies
verbs:
- use
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: default-psp-rolebinding
namespace: cattle-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: default-psp-role
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:serviceaccounts
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:authenticated
---
apiVersion: extensions/v1beta1
kind: PodSecurityPolicy
metadata:
name: restricted
spec:
requiredDropCapabilities:
- NET_RAW
privileged: false
allowPrivilegeEscalation: false
defaultAllowPrivilegeEscalation: false
fsGroup:
rule: RunAsAny
runAsUser:
rule: MustRunAsNonRoot
seLinux:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
volumes:
- emptyDir
- secret
- persistentVolumeClaim
- downwardAPI
- configMap
- projected
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: psp:restricted
rules:
- apiGroups:
- extensions
resourceNames:
- restricted
resources:
- podsecuritypolicies
verbs:
- use
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: psp:restricted
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: psp:restricted
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:serviceaccounts
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:authenticated
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: tiller
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: tiller
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: tiller
namespace: kube-system
ignore_docker_version: true
kubernetes_version: v1.15.6-rancher1-2
#
# If you are using calico on AWS
#
# network:
# plugin: calico
# calico_network_provider:
# cloud_provider: aws
#
# # To specify flannel interface
#
# network:
# plugin: flannel
# flannel_network_provider:
# iface: eth1
#
# # To specify flannel interface for canal plugin
#
# network:
# plugin: canal
# canal_network_provider:
# iface: eth1
#
network:
mtu: 0
plugin: canal
#
# services:
# kube-api:
# service_cluster_ip_range: 10.43.0.0/16
# kube-controller:
# cluster_cidr: 10.42.0.0/16
# service_cluster_ip_range: 10.43.0.0/16
# kubelet:
# cluster_domain: cluster.local
# cluster_dns_server: 10.43.0.10
#
services:
etcd:
backup_config:
enabled: false
interval_hours: 12
retention: 6
safe_timestamp: false
creation: 12h
extra_args:
data-dir: /var/lib/etcd
extra_binds:
- '/var/lib/etcd:/var/lib/etcd'
gid: 52034
retention: 72h
snapshot: false
uid: 52034
kube_api:
always_pull_images: false
extra_args:
admission-control-config-file: /opt/kubernetes/admission.yaml
anonymous-auth: 'false'
audit-log-format: json
audit-log-maxage: '30'
audit-log-maxbackup: '10'
audit-log-maxsize: '100'
audit-log-path: /var/log/kube-audit/audit-log.json
audit-policy-file: /opt/kubernetes/audit.yaml
enable-admission-plugins: >-
ServiceAccount,NamespaceLifecycle,LimitRanger,PersistentVolumeLabel,DefaultStorageClass,ResourceQuota,DefaultTolerationSeconds,AlwaysPullImages,DenyEscalatingExec,NodeRestriction,EventRateLimit,PodSecurityPolicy
encryption-provider-config: /opt/kubernetes/encryption.yaml
profiling: 'false'
service-account-lookup: 'true'
tls-cipher-suites: >-
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256
extra_binds:
- '/var/log/kube-audit:/var/log/kube-audit'
- '/opt/kubernetes:/opt/kubernetes'
pod_security_policy: true
service_node_port_range: 30000-32767
kube_controller:
extra_args:
address: 127.0.0.1
feature-gates: RotateKubeletServerCertificate=true
profiling: 'false'
terminated-pod-gc-threshold: '1000'
kubelet:
extra_args:
anonymous-auth: 'false'
event-qps: '0'
feature-gates: RotateKubeletServerCertificate=true
make-iptables-util-chains: 'true'
protect-kernel-defaults: 'true'
streaming-connection-idle-timeout: 1800s
tls-cipher-suites: >-
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256
fail_swap_on: false
generate_serving_certificate: true
scheduler:
extra_args:
address: 127.0.0.1
profiling: 'false'
ssh_agent_auth: false
windows_prefered_cluster: false
```
### Hardened Example Ubuntu cloud-config:
``` yaml
#cloud-config
package_update: false
packages:
- curl
- jq
runcmd:
- sysctl -w vm.overcommit_memory=1
- sysctl -w kernel.panic=10
- sysctl -w kernel.panic_on_oops=1
- curl https://releases.rancher.com/install-docker/18.09.sh | sh
- usermod -aG docker ubuntu
- return=1; while [ $return != 0 ]; do sleep 2; docker ps; return=$?; done
- addgroup --gid 52034 etcd
- useradd --comment "etcd service account" --uid 52034 --gid 52034 etcd
- mkdir -p /var/lib/etcd && chown etcd.etcd /var/lib/etcd && chmod 0700 /var/lib/etcd
- ${agent_cmd} --etcd --controlplane --worker
- mkdir /mnt/kube-bench
write_files:
- path: /etc/sysctl.d/kubelet.conf
owner: root:root
permissions: "0644"
content: |
vm.overcommit_memory=1
kernel.panic=10
kernel.panic_on_oops=1
- path: /opt/kubernetes/admission.yaml
owner: root:root
permissions: "0600"
content: |
apiVersion: apiserver.k8s.io/v1alpha1
kind: AdmissionConfiguration
plugins:
- name: EventRateLimit
path: /opt/kubernetes/event.yaml
- path: /opt/kubernetes/event.yaml
owner: root:root
permissions: "0600"
content: |
apiVersion: eventratelimit.admission.k8s.io/v1alpha1
kind: Configuration
limits:
- type: Server
qps: 5000
burst: 20000
- path: /opt/kubernetes/encryption.yaml
owner: root:root
permissions: "0600"
content: |
apiVersion: apiserver.config.k8s.io/v1
kind: EncryptionConfiguration
resources:
- resources:
- secrets
providers:
- aescbc:
keys:
- name: key1
secret: LF7YiCFyWqAa2MovOgp42rArBdLBGWdjJpX2knvYAkc=
- identity: {}
- path: /opt/kubernetes/audit.yaml
owner: root:root
permissions: "0600"
content: |
apiVersion: audit.k8s.io/v1beta1
kind: Policy
rules:
- level: Metadata
```
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---
title: Hardening Guide v2.3.5
weight: 100
---
This document provides prescriptive guidance for hardening a production installation of Rancher v2.3.5. It outlines the configurations and controls required to address Kubernetes benchmark controls from the Center for Information Security (CIS).
> This hardening guide describes how to secure the nodes in your cluster, and it is recommended to follow this guide before installing Kubernetes.
This hardening guide is intended to be used with specific versions of the CIS Kubernetes Benchmark, Kubernetes, and Rancher:
Hardening Guide Version | Rancher Version | CIS Benchmark Version | Kubernetes Version
------------------------|----------------|-----------------------|------------------
Hardening Guide v2.3.5 | Rancher v2.3.5 | Benchmark v1.5 | Kubernetes 1.15
[Click here to download a PDF version of this document](https://releases.rancher.com/documents/security/2.3.5/Rancher_Hardening_Guide.pdf)
### Overview
This document provides prescriptive guidance for hardening a production installation of Rancher v2.3.5 with Kubernetes v1.15. It outlines the configurations required to address Kubernetes benchmark controls from the Center for Information Security (CIS).
For more detail about evaluating a hardened cluster against the official CIS benchmark, refer to the [CIS Benchmark Rancher Self-Assessment Guide - Rancher v2.3.5]({{< baseurl >}}/rancher/v2.x/en/security/benchmark-2.3.5/).
### Configure Kernel Runtime Parameters
The folowing `sysctl` configuration is recommended for all nodes type in the cluster. Set the following parameters in `/etc/sysctl.d/90-kubelet.conf`:
``` bash
vm.overcommit_memory=1
vm.panic_on_oom=0
kernel.panic=10
kernel.panic_on_oops=1
kernel.keys.root_maxbytes=25000000
```
Run `sysctl -p /etc/sysctl.d/90-kubelet.conf` to enable the settings.
### Configure `etcd` user and group
A user account and group for the **etcd** service is required to be setup prior to installing RKE. The **uid** and **gid** for the **etcd** user will be used in the RKE **config.yml** to set the proper permissions for files and directories during installation time.
#### create `etcd` user and group
To create the **etcd** group run the following console commands.
```
addgroup --gid 52034 etcd
useradd --comment "etcd service account" --uid 52034 --gid 52034 etcd
```
Update the RKE **config.yml** with the **uid** and **gid** of the **etcd** user:
``` yaml
services:
etcd:
gid: 52034
uid: 52034
```
#### Set `automountServiceAccountToken` to `false` for `default` service accounts
Kubernetes provides a default service account which is used by cluster workloads where no specific service account is assigned to the pod. Where access to the Kubernetes API from a pod is required, a specific service account should be created for that pod, and rights granted to that service account. The default service account should be configured such that it does not provide a service account token and does not have any explicit rights assignments.
For each namespace the **default** service account must include this value:
```
automountServiceAccountToken: false
```
Save the following yaml to a file called `account_update.yaml`
``` yaml
apiVersion: v1
kind: ServiceAccount
metadata:
name: default
automountServiceAccountToken: false
```
Create a bash script file called `account_update.sh`. Be sure to `chmod +x account_update.sh` so the script has execute permissions.
```
#!/bin/bash -e
for namespace in $(kubectl get namespaces -A -o json | jq -r '.items[].metadata.name'); do
kubectl patch serviceaccount default -n ${namespace} -p "$(cat account_update.yaml)"
done
```
### Ensure that all Namespaces have Network Policies defined
Running different applications on the same Kubernetes cluster creates a risk of one
compromised application attacking a neighboring application. Network segmentation is
important to ensure that containers can communicate only with those they are supposed
to. A network policy is a specification of how selections of pods are allowed to
communicate with each other and other network endpoints.
Network Policies are namespace scoped. When a network policy is introduced to a given
namespace, all traffic not allowed by the policy is denied. However, if there are no network
policies in a namespace all traffic will be allowed into and out of the pods in that
namespace.
> todo: add information about network policies and provide default example here:
### Reference Hardened RKE `config.yml` configuration
``` yaml
# If you intened to deploy Kubernetes in an air-gapped environment,
# please consult the documentation on how to configure custom RKE images.
kubernetes_version: "v1.15.9-rancher1-1"
enable_network_policy: true
default_pod_security_policy_template_id: "restricted"
nodes:
- address: "172.16.16.9"
port: ""
internal_address: ""
role:
- controlplane
- etcd
- worker
hostname_override: ""
user: "ubuntu"
services:
etcd:
uid: 52034
gid: 52034
kube-api:
pod_security_policy: true
secrets_encryption_config:
enabled: true
audit_log:
enabled: true
admission_configuration:
event_rate_limit:
enabled: true
kube-controller:
extra_args:
feature-gates: "RotateKubeletServerCertificate=true"
scheduler:
image: ""
extra_args: {}
extra_binds: []
extra_env: []
kubelet:
generate_serving_certificate: true
extra_args:
feature-gates: "RotateKubeletServerCertificate=true"
protect-kernel-defaults: "true"
tls-cipher-suites: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256"
extra_binds: []
extra_env: []
cluster_domain: ""
infra_container_image: ""
cluster_dns_server: ""
fail_swap_on: false
generate_serving_certificate: true
kubeproxy:
image: ""
extra_args: {}
extra_binds: []
extra_env: []
network:
plugin: ""
options: {}
mtu: 0
node_selector: {}
authentication:
strategy: ""
sans: []
webhook: null
addons: |
---
apiVersion: v1
kind: Namespace
metadata:
name: ingress-nginx
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: default-psp-role
namespace: ingress-nginx
rules:
- apiGroups:
- extensions
resourceNames:
- default-psp
resources:
- podsecuritypolicies
verbs:
- use
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: default-psp-rolebinding
namespace: ingress-nginx
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: default-psp-role
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:serviceaccounts
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:authenticated
---
apiVersion: v1
kind: Namespace
metadata:
name: cattle-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: default-psp-role
namespace: cattle-system
rules:
- apiGroups:
- extensions
resourceNames:
- default-psp
resources:
- podsecuritypolicies
verbs:
- use
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: default-psp-rolebinding
namespace: cattle-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: default-psp-role
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:serviceaccounts
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:authenticated
---
apiVersion: extensions/v1beta1
kind: PodSecurityPolicy
metadata:
name: restricted
spec:
requiredDropCapabilities:
- NET_RAW
privileged: false
allowPrivilegeEscalation: false
defaultAllowPrivilegeEscalation: false
fsGroup:
rule: RunAsAny
runAsUser:
rule: MustRunAsNonRoot
seLinux:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
volumes:
- emptyDir
- secret
- persistentVolumeClaim
- downwardAPI
- configMap
- projected
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: psp:restricted
rules:
- apiGroups:
- extensions
resourceNames:
- restricted
resources:
- podsecuritypolicies
verbs:
- use
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: psp:restricted
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: psp:restricted
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:serviceaccounts
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:authenticated
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: tiller
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: tiller
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: tiller
namespace: kube-system
addons_include: []
system_images:
etcd: ""
alpine: ""
nginx_proxy: ""
cert_downloader: ""
kubernetes_services_sidecar: ""
kubedns: ""
dnsmasq: ""
kubedns_sidecar: ""
kubedns_autoscaler: ""
coredns: ""
coredns_autoscaler: ""
kubernetes: ""
flannel: ""
flannel_cni: ""
calico_node: ""
calico_cni: ""
calico_controllers: ""
calico_ctl: ""
calico_flexvol: ""
canal_node: ""
canal_cni: ""
canal_flannel: ""
canal_flexvol: ""
weave_node: ""
weave_cni: ""
pod_infra_container: ""
ingress: ""
ingress_backend: ""
metrics_server: ""
windows_pod_infra_container: ""
ssh_key_path: ""
ssh_cert_path: ""
ssh_agent_auth: false
authorization:
mode: ""
options: {}
ignore_docker_version: false
private_registries: []
ingress:
provider: ""
options: {}
node_selector: {}
extra_args: {}
dns_policy: ""
extra_envs: []
extra_volumes: []
extra_volume_mounts: []
cluster_name: ""
prefix_path: ""
addon_job_timeout: 0
bastion_host:
address: ""
port: ""
user: ""
ssh_key: ""
ssh_key_path: ""
ssh_cert: ""
ssh_cert_path: ""
monitoring:
provider: ""
options: {}
node_selector: {}
restore:
restore: false
snapshot_name: ""
dns: null
```
### Reference Hardened RKE Template configuration
``` yaml
todo:
```
### Hardened Reference Ubuntu **cloud-config**:
``` yaml
#cloud-config
packages:
- curl
- jq
runcmd:
- sysctl -w vm.overcommit_memory=1
- sysctl -w kernel.panic=10
- sysctl -w kernel.panic_on_oops=1
- curl https://releases.rancher.com/install-docker/18.09.sh | sh
- usermod -aG docker ubuntu
- return=1; while [ $return != 0 ]; do sleep 2; docker ps; return=$?; done
- addgroup --gid 52034 etcd
- useradd --comment "etcd service account" --uid 52034 --gid 52034 etcd
write_files:
- path: /etc/sysctl.d/kubelet.conf
owner: root:root
permissions: "0644"
content: |
vm.overcommit_memory=1
kernel.panic=10
kernel.panic_on_oops=1
```