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k8s control plane hardening #4404

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k8s control plane hardening #4404

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20 changes: 19 additions & 1 deletion salt/metalk8s/kubernetes/apiserver/installed.sls
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,13 @@ include:
name=pod_name, state="ready", ignore_not_found=True
) %}

Ensure audit log path exist:
file.directory:
- name: /var/log/apiserver/
- user: root
- group: root
- mode: '0755'

Create kube-apiserver Pod manifest:
metalk8s.static_pod_managed:
- name: /etc/kubernetes/manifests/kube-apiserver.yaml
Expand Down Expand Up @@ -85,19 +92,28 @@ Create kube-apiserver Pod manifest:
- kube-apiserver
- --advertise-address={{ host }}
- --allow-privileged=true
- --anonymous-auth=false
- --audit-log-maxage=30
- --audit-log-maxbackup=10
- --audit-log-maxsize=100
- --audit-log-path=/var/log/apiserver/audit.log
- --authorization-mode=Node,RBAC
- --client-ca-file=/etc/kubernetes/pki/ca.crt
- --enable-admission-plugins=NodeRestriction
- --disable-admission-plugins=DenyServiceExternalIPs
- --enable-admission-plugins=NodeRestriction,AlwaysPullImages
- --enable-bootstrap-token-auth=true
- --etcd-cafile=/etc/kubernetes/pki/etcd/ca.crt
- --etcd-certfile={{ certificates.client.files['apiserver-etcd'].path }}
- --etcd-keyfile=/etc/kubernetes/pki/apiserver-etcd-client.key
- --etcd-servers={{ etcd_servers | join(",") }}
- --kubelet-certificate-authority=/etc/kubernetes/pki/ca.crt
- --kubelet-client-certificate={{ certificates.client.files['apiserver-kubelet'].path }}
- --kubelet-client-key=/etc/kubernetes/pki/apiserver-kubelet-client.key
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --profiling=false
- --proxy-client-cert-file={{ certificates.client.files['front-proxy'].path }}
- --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client.key
- --request-timeout=300s
- --requestheader-allowed-names=front-proxy-client
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt
- --requestheader-extra-headers-prefix=X-Remote-Extra-
Expand All @@ -106,9 +122,11 @@ Create kube-apiserver Pod manifest:
- --secure-port=6443
- --service-account-issuer=https://kubernetes.default.svc.{{ coredns.cluster_domain }}
- --service-account-key-file=/etc/kubernetes/pki/sa.pub
- --service-account-lookup=true
- --service-account-signing-key-file=/etc/kubernetes/pki/sa.key
- --service-cluster-ip-range={{ networks.service }}
- --tls-cert-file={{ certificates.server.files.apiserver.path }}
- --tls-cipher-suites=TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_RSA_WITH_3DES_EDE_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_256_GCM_SHA384.
- --tls-private-key-file=/etc/kubernetes/pki/apiserver.key
# }
- --bind-address={{ host }}
Expand Down
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