mirror of
https://github.com/rancher/rancher-docs.git
synced 2026-05-15 09:33:30 +00:00
hardening guide updates
This commit is contained in:
Nelson Roberts
@@ -1,9 +1,9 @@
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---
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title: Hardening Guide with CIS 1.5 Benchmark
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weight: 99
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title: Hardening Guide with CIS 1.6 Benchmark
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weight: 100
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---
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This document provides prescriptive guidance for hardening a production installation of a RKE cluster to be used with Rancher v2.5. It outlines the configurations and controls required to address Kubernetes benchmark controls from the Center for Information Security (CIS).
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This document provides prescriptive guidance for hardening a production installation of a RKE cluster to be used with Rancher v2.5.4. It outlines the configurations and controls required to address Kubernetes benchmark controls from the Center for Information Security (CIS).
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> This hardening guide describes how to secure the nodes in your cluster, and it is recommended to follow this guide before installing Kubernetes.
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@@ -11,26 +11,26 @@ This hardening guide is intended to be used for RKE clusters and associated with
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Rancher Version | CIS Benchmark Version | Kubernetes Version
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----------------|-----------------------|------------------
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Rancher v2.5 | Benchmark v1.5 | Kubernetes 1.15
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Rancher v2.5.4 | Benchmark 1.6 | Kubernetes v1.18
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[Click here to download a PDF version of this document](https://releases.rancher.com/documents/security/2.5/Rancher_Hardening_Guide_CIS_1.5.pdf)
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[Click here to download a PDF version of this document](https://releases.rancher.com/documents/security/2.5/Rancher_Hardening_Guide_CIS_1.6.pdf)
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### Overview
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This document provides prescriptive guidance for hardening a RKE cluster to be used for installing Rancher v2.5 with Kubernetes v1.15 or provisioning a RKE cluster with Kubernetes 1.15 to be used within Rancher v2.5. It outlines the configurations required to address Kubernetes benchmark controls from the Center for Information Security (CIS).
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This document provides prescriptive guidance for hardening a RKE cluster to be used for installing Rancher v2.5.4 with Kubernetes v1.18 or provisioning a RKE cluster with Kubernetes v1.18 to be used within Rancher v2.5.4. It outlines the configurations required to address Kubernetes benchmark controls from the Center for Information Security (CIS).
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For more detail about evaluating a hardened cluster against the official CIS benchmark, refer to the [CIS 1.5 Benchmark - Self-Assessment Guide - Rancher v2.5]({{< baseurl >}}/rancher/v2.x/en/security/rancher-2.5/1.5-benchmark-2.5/).
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For more detail about evaluating a hardened cluster against the official CIS benchmark, refer to the [CIS 1.6 Benchmark - Self-Assessment Guide - Rancher v2.5.4]({{< baseurl >}}/rancher/v2.x/en/security/rancher-2.5/1.6-benchmark-2.5/).
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#### Known Issues
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- Rancher **exec shell** and **view logs** for pods are **not** functional in a CIS 1.5 hardened setup when only public IP is provided when registering custom nodes. This functionality requires a private IP to be provided when registering the custom nodes.
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- When setting the `default_pod_security_policy_template_id:` to `restricted` Rancher creates **RoleBindings** and **ClusterRoleBindings** on the default service accounts. The CIS 1.5 5.1.5 check requires the default service accounts have no roles or cluster roles bound to it apart from the defaults. In addition the default service accounts should be configured such that it does not provide a service account token and does not have any explicit rights assignments.
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- Rancher **exec shell** and **view logs** for pods are **not** functional in a CIS 1.6 hardened setup when only public IP is provided when registering custom nodes. This functionality requires a private IP to be provided when registering the custom nodes.
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- When setting the `default_pod_security_policy_template_id:` to `restricted` Rancher creates **RoleBindings** and **ClusterRoleBindings** on the default service accounts. The CIS 1.6 5.1.5 check requires the default service accounts have no roles or cluster roles bound to it apart from the defaults. In addition the default service accounts should be configured such that it does not provide a service account token and does not have any explicit rights assignments.
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### Configure Kernel Runtime Parameters
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The following `sysctl` configuration is recommended for all nodes type in the cluster. Set the following parameters in `/etc/sysctl.d/90-kubelet.conf`:
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```
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```ini
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vm.overcommit_memory=1
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vm.panic_on_oom=0
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kernel.panic=10
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@@ -48,14 +48,14 @@ To create the **etcd** group run the following console commands.
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The commands below use `52034` for **uid** and **gid** are for example purposes. Any valid unused **uid** or **gid** could also be used in lieu of `52034`.
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```
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```bash
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groupadd --gid 52034 etcd
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useradd --comment "etcd service account" --uid 52034 --gid 52034 etcd
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```
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Update the RKE **config.yml** with the **uid** and **gid** of the **etcd** user:
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``` yaml
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```yaml
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services:
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etcd:
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gid: 52034
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@@ -67,13 +67,13 @@ Kubernetes provides a default service account which is used by cluster workloads
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For each namespace including **default** and **kube-system** on a standard RKE install the **default** service account must include this value:
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```
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```yaml
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automountServiceAccountToken: false
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```
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Save the following yaml to a file called `account_update.yaml`
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``` yaml
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```yaml
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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||||
@@ -83,7 +83,7 @@ automountServiceAccountToken: false
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||||
Create a bash script file called `account_update.sh`. Be sure to `chmod +x account_update.sh` so the script has execute permissions.
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||||
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||||
```
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||||
```bash
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#!/bin/bash -e
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for namespace in $(kubectl get namespaces -A -o json | jq -r '.items[].metadata.name'); do
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||||
@@ -116,7 +116,7 @@ about network policies can be found on the Kubernetes site.
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||||
|
||||
> This `NetworkPolicy` is not recommended for production use
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||||
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||||
``` yaml
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||||
```yaml
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||||
---
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||||
apiVersion: networking.k8s.io/v1
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kind: NetworkPolicy
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@@ -136,13 +136,14 @@ spec:
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||||
Create a bash script file called `apply_networkPolicy_to_all_ns.sh`. Be sure to
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`chmod +x apply_networkPolicy_to_all_ns.sh` so the script has execute permissions.
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```
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```bash
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#!/bin/bash -e
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for namespace in $(kubectl get namespaces -A -o json | jq -r '.items[].metadata.name'); do
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kubectl apply -f default-allow-all.yaml -n ${namespace}
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done
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```
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Execute this script to apply the `default-allow-all.yaml` the **permissive** `NetworkPolicy` to all namespaces.
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### Reference Hardened RKE `cluster.yml` configuration
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@@ -152,139 +153,111 @@ of Rancher Kubernetes Engine (RKE). Install [documentation](https://rancher.com/
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||||
provided with additional details about the configuration items. This reference `cluster.yml` does not include the required **nodes** directive which will vary depending on your environment. Documentation for node configuration can be found here: https://rancher.com/docs/rke/latest/en/config-options/nodes
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||||
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``` yaml
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```yaml
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# If you intend to deploy Kubernetes in an air-gapped environment,
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# please consult the documentation on how to configure custom RKE images.
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kubernetes_version: "v1.15.9-rancher1-1"
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enable_network_policy: true
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default_pod_security_policy_template_id: "restricted"
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# https://rancher.com/docs/rke/latest/en/installation/
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||||
# the nodes directive is required and will vary depending on your environment
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||||
# documentation for node configuration can be found here:
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||||
# https://rancher.com/docs/rke/latest/en/config-options/nodes
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||||
nodes:
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||||
# https://rancher.com/docs/rke/latest/en/config-options/nodes
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||||
nodes: []
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||||
services:
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||||
etcd:
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||||
image: ""
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||||
extra_args: {}
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||||
extra_binds: []
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||||
extra_env: []
|
||||
win_extra_args: {}
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||||
win_extra_binds: []
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||||
win_extra_env: []
|
||||
external_urls: []
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||||
ca_cert: ""
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||||
cert: ""
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||||
key: ""
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||||
path: ""
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||||
uid: 52034
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||||
gid: 52034
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||||
snapshot: true
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||||
retention: ""
|
||||
creation: ""
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||||
backup_config: null
|
||||
kube-api:
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||||
image: ""
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||||
extra_args: {}
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||||
extra_binds: []
|
||||
extra_env: []
|
||||
win_extra_args: {}
|
||||
win_extra_binds: []
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||||
win_extra_env: []
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||||
service_cluster_ip_range: ""
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||||
service_node_port_range: ""
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||||
pod_security_policy: true
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||||
always_pull_images: false
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||||
secrets_encryption_config:
|
||||
enabled: true
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||||
custom_config: null
|
||||
audit_log:
|
||||
enabled: true
|
||||
admission_configuration:
|
||||
configuration: null
|
||||
admission_configuration: null
|
||||
event_rate_limit:
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||||
enabled: true
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||||
configuration: null
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||||
kube-controller:
|
||||
image: ""
|
||||
extra_args:
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||||
feature-gates: "RotateKubeletServerCertificate=true"
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||||
feature-gates: RotateKubeletServerCertificate=true
|
||||
extra_binds: []
|
||||
extra_env: []
|
||||
win_extra_args: {}
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||||
win_extra_binds: []
|
||||
win_extra_env: []
|
||||
cluster_cidr: ""
|
||||
service_cluster_ip_range: ""
|
||||
scheduler:
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||||
image: ""
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||||
extra_args: {}
|
||||
extra_binds: []
|
||||
extra_env: []
|
||||
win_extra_args: {}
|
||||
win_extra_binds: []
|
||||
win_extra_env: []
|
||||
kubelet:
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||||
generate_serving_certificate: true
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||||
image: ""
|
||||
extra_args:
|
||||
feature-gates: "RotateKubeletServerCertificate=true"
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||||
feature-gates: RotateKubeletServerCertificate=true
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||||
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"
|
||||
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: ""
|
||||
win_extra_args: {}
|
||||
win_extra_binds: []
|
||||
win_extra_env: []
|
||||
cluster_domain: cluster.local
|
||||
infra_container_image: ""
|
||||
cluster_dns_server: ""
|
||||
fail_swap_on: false
|
||||
generate_serving_certificate: true
|
||||
kubeproxy:
|
||||
image: ""
|
||||
extra_args: {}
|
||||
extra_binds: []
|
||||
extra_env: []
|
||||
win_extra_args: {}
|
||||
win_extra_binds: []
|
||||
win_extra_env: []
|
||||
network:
|
||||
plugin: ""
|
||||
options: {}
|
||||
mtu: 0
|
||||
node_selector: {}
|
||||
update_strategy: null
|
||||
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
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||||
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: policy/v1beta1
|
||||
kind: PodSecurityPolicy
|
||||
metadata:
|
||||
@@ -311,55 +284,25 @@ addons: |
|
||||
- configMap
|
||||
- projected
|
||||
---
|
||||
apiVersion: rbac.authorization.k8s.io/v1
|
||||
kind: ClusterRole
|
||||
apiVersion: networking.k8s.io/v1
|
||||
kind: NetworkPolicy
|
||||
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
|
||||
name: default-allow-all
|
||||
spec:
|
||||
podSelector: {}
|
||||
ingress:
|
||||
- {}
|
||||
egress:
|
||||
- {}
|
||||
policyTypes:
|
||||
- Ingress
|
||||
- Egress
|
||||
---
|
||||
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
|
||||
|
||||
name: default
|
||||
automountServiceAccountToken: false
|
||||
addons_include: []
|
||||
system_images:
|
||||
etcd: ""
|
||||
@@ -373,6 +316,7 @@ system_images:
|
||||
kubedns_autoscaler: ""
|
||||
coredns: ""
|
||||
coredns_autoscaler: ""
|
||||
nodelocal: ""
|
||||
kubernetes: ""
|
||||
flannel: ""
|
||||
flannel_cni: ""
|
||||
@@ -383,6 +327,7 @@ system_images:
|
||||
calico_flexvol: ""
|
||||
canal_node: ""
|
||||
canal_cni: ""
|
||||
canal_controllers: ""
|
||||
canal_flannel: ""
|
||||
canal_flexvol: ""
|
||||
weave_node: ""
|
||||
@@ -399,6 +344,7 @@ authorization:
|
||||
mode: ""
|
||||
options: {}
|
||||
ignore_docker_version: false
|
||||
kubernetes_version: v1.18.12-rancher1-1
|
||||
private_registries: []
|
||||
ingress:
|
||||
provider: ""
|
||||
@@ -409,8 +355,15 @@ ingress:
|
||||
extra_envs: []
|
||||
extra_volumes: []
|
||||
extra_volume_mounts: []
|
||||
cluster_name: ""
|
||||
update_strategy: null
|
||||
http_port: 0
|
||||
https_port: 0
|
||||
network_mode: ""
|
||||
cluster_name:
|
||||
cloud_provider:
|
||||
name: ""
|
||||
prefix_path: ""
|
||||
win_prefix_path: ""
|
||||
addon_job_timeout: 0
|
||||
bastion_host:
|
||||
address: ""
|
||||
@@ -424,10 +377,17 @@ monitoring:
|
||||
provider: ""
|
||||
options: {}
|
||||
node_selector: {}
|
||||
update_strategy: null
|
||||
replicas: null
|
||||
restore:
|
||||
restore: false
|
||||
snapshot_name: ""
|
||||
dns: null
|
||||
upgrade_strategy:
|
||||
max_unavailable_worker: ""
|
||||
max_unavailable_controlplane: ""
|
||||
drain: null
|
||||
node_drain_input: null
|
||||
```
|
||||
|
||||
### Reference Hardened RKE Template configuration
|
||||
@@ -436,198 +396,49 @@ The reference RKE Template provides the configuration needed to achieve a harden
|
||||
RKE Templates are used to provision Kubernetes and define Rancher settings. Follow the Rancher
|
||||
[documentaion](https://rancher.com/docs/rancher/v2.x/en/installation) for additional installation and RKE Template details.
|
||||
|
||||
``` yaml
|
||||
#
|
||||
```yaml
|
||||
#
|
||||
# Cluster Config
|
||||
#
|
||||
#
|
||||
default_pod_security_policy_template_id: restricted
|
||||
docker_root_dir: /var/lib/docker
|
||||
enable_cluster_alerting: false
|
||||
enable_cluster_monitoring: false
|
||||
enable_network_policy: true
|
||||
#
|
||||
#
|
||||
# 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: policy/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
|
||||
addon_job_timeout: 45
|
||||
ignore_docker_version: true
|
||||
kubernetes_version: v1.15.9-rancher1-1
|
||||
#
|
||||
kubernetes_version: v1.18.12-rancher1-1
|
||||
#
|
||||
# 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
|
||||
#
|
||||
rotate_encryption_key: false
|
||||
#
|
||||
# services:
|
||||
# kube-api:
|
||||
# service_cluster_ip_range: 10.43.0.0/16
|
||||
@@ -637,7 +448,7 @@ rancher_kubernetes_engine_config:
|
||||
# kubelet:
|
||||
# cluster_domain: cluster.local
|
||||
# cluster_dns_server: 10.43.0.10
|
||||
#
|
||||
#
|
||||
services:
|
||||
etcd:
|
||||
backup_config:
|
||||
@@ -665,56 +476,63 @@ rancher_kubernetes_engine_config:
|
||||
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
|
||||
upgrade_strategy:
|
||||
max_unavailable_controlplane: '1'
|
||||
max_unavailable_worker: 10%
|
||||
windows_prefered_cluster: false
|
||||
```
|
||||
|
||||
### Hardened Reference Ubuntu 18.04 LTS **cloud-config**:
|
||||
### Hardened Reference Ubuntu 20.04 LTS **cloud-config**:
|
||||
|
||||
The reference **cloud-config** is generally used in cloud infrastructure environments to allow for
|
||||
configuration management of compute instances. The reference config configures Ubuntu operating system level settings
|
||||
needed before installing kubernetes.
|
||||
|
||||
``` yaml
|
||||
```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
|
||||
apt:
|
||||
sources:
|
||||
docker.list:
|
||||
source: deb [arch=amd64] http://download.docker.com/linux/ubuntu $RELEASE stable
|
||||
keyid: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
|
||||
system_info:
|
||||
default_user:
|
||||
groups:
|
||||
- docker
|
||||
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: "/etc/apt/preferences.d/docker"
|
||||
owner: root:root
|
||||
permissions: '0600'
|
||||
content: |
|
||||
Package: docker-ce
|
||||
Pin: version 5:19*
|
||||
Pin-Priority: 800
|
||||
- path: "/etc/sysctl.d/90-kubelet.conf"
|
||||
owner: root:root
|
||||
permissions: '0644'
|
||||
content: |
|
||||
vm.overcommit_memory=1
|
||||
vm.panic_on_oom=0
|
||||
kernel.panic=10
|
||||
kernel.panic_on_oops=1
|
||||
kernel.keys.root_maxbytes=25000000
|
||||
package_update: true
|
||||
packages:
|
||||
- docker-ce
|
||||
- docker-ce-cli
|
||||
- containerd.io
|
||||
runcmd:
|
||||
- sysctl -p /etc/sysctl.d/90-kubelet.conf
|
||||
- groupadd --gid 52034 etcd
|
||||
- useradd --comment "etcd service account" --uid 52034 --gid 52034 etcd
|
||||
```
|
||||
|
||||
Reference in New Issue
Block a user