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Use dedicated front-proxy-ca for front-proxy-client

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This commit is contained in:
Chad Swenson 2018-04-05 14:32:12 -05:00
parent a6a47dbc96
commit d87b6fd9f3
12 changed files with 73 additions and 7 deletions
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4
roles/kubernetes/master/tasks/kubeadm-migrate-certs.yml
View file

@ -9,6 +9,10 @@
- {src: apiserver-key.pem, dest: apiserver.key}
- {src: ca.pem, dest: ca.crt}
- {src: ca-key.pem, dest: ca.key}
- {src: front-proxy-ca.pem, dest: front-proxy-ca.crt}
- {src: front-proxy-ca-key.pem, dest: front-proxy-ca.key}
- {src: front-proxy-client.pem, dest: front-proxy-client.crt}
- {src: front-proxy-client-key.pem, dest: front-proxy-client.key}
- {src: service-account-key.pem, dest: sa.pub}
- {src: service-account-key.pem, dest: sa.key}
register: kubeadm_copy_old_certs

2
roles/kubernetes/master/templates/manifests/kube-apiserver.manifest.j2
View file

@ -111,7 +111,7 @@ spec:
- --feature-gates={{ kube_feature_gates|join(',') }}
{% endif %}
{% if kube_version | version_compare('v1.9', '>=') %}
- --requestheader-client-ca-file={{ kube_cert_dir }}/ca.pem
- --requestheader-client-ca-file={{ kube_cert_dir }}/front-proxy-ca.pem
- --requestheader-allowed-names=front-proxy-client
- --requestheader-extra-headers-prefix=X-Remote-Extra-
- --requestheader-group-headers=X-Remote-Group

1
roles/kubernetes/secrets/defaults/main.yml
View file

@ -1,3 +1,4 @@
---
kube_cert_group: kube-cert
kube_vault_mount_path: kube
front_proxy_vault_mount_path: front-proxy

19
roles/kubernetes/secrets/files/make-ssl.sh
View file

@ -72,6 +72,15 @@ else
openssl req -x509 -new -nodes -key ca-key.pem -days 36500 -out ca.pem -subj "/CN=kube-ca" > /dev/null 2>&1
fi
# Front proxy client CA
if [ -e "$SSLDIR/front-proxy-ca-key.pem" ]; then
# Reuse existing front proxy CA
cp $SSLDIR/{front-proxy-ca.pem,front-proxy-ca-key.pem} .
else
openssl genrsa -out front-proxy-ca-key.pem 2048 > /dev/null 2>&1
openssl req -x509 -new -nodes -key front-proxy-ca-key.pem -days 36500 -out front-proxy-ca.pem -subj "/CN=front-proxy-ca" > /dev/null 2>&1
fi
gen_key_and_cert() {
local name=$1
local subject=$2
@ -80,6 +89,14 @@ gen_key_and_cert() {
openssl x509 -req -in ${name}.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out ${name}.pem -days 36500 -extensions v3_req -extfile ${CONFIG} > /dev/null 2>&1
}
gen_key_and_cert_front_proxy() {
local name=$1
local subject=$2
openssl genrsa -out ${name}-key.pem 2048 > /dev/null 2>&1
openssl req -new -key ${name}-key.pem -out ${name}.csr -subj "${subject}" -config ${CONFIG} > /dev/null 2>&1
openssl x509 -req -in ${name}.csr -CA front-proxy-ca.pem -CAkey front-proxy-ca-key.pem -CAcreateserial -out ${name}.pem -days 36500 -extensions v3_req -extfile ${CONFIG} > /dev/null 2>&1
}
# Admins
if [ -n "$MASTERS" ]; then
@ -105,7 +122,7 @@ if [ -n "$MASTERS" ]; then
# kube-controller-manager
gen_key_and_cert "kube-controller-manager" "/CN=system:kube-controller-manager"
# metrics aggregator
gen_key_and_cert "front-proxy-client" "/CN=front-proxy-client"
gen_key_and_cert_front_proxy "front-proxy-client" "/CN=front-proxy-client"
for host in $MASTERS; do
cn="${host%%.*}"

3
roles/kubernetes/secrets/tasks/check-certs.yml
View file

@ -48,6 +48,8 @@
'{{ kube_cert_dir }}/kube-scheduler-key.pem',
'{{ kube_cert_dir }}/kube-controller-manager.pem',
'{{ kube_cert_dir }}/kube-controller-manager-key.pem',
'{{ kube_cert_dir }}/front-proxy-ca.pem',
'{{ kube_cert_dir }}/front-proxy-ca-key.pem',
'{{ kube_cert_dir }}/front-proxy-client.pem',
'{{ kube_cert_dir }}/front-proxy-client-key.pem',
'{{ kube_cert_dir }}/service-account-key.pem',
@ -72,6 +74,7 @@
{% for cert in ['apiserver.pem', 'apiserver-key.pem',
'kube-scheduler.pem','kube-scheduler-key.pem',
'kube-controller-manager.pem','kube-controller-manager-key.pem',
'front-proxy-ca.pem','front-proxy-ca-key.pem',
'front-proxy-client.pem','front-proxy-client-key.pem',
'service-account-key.pem'] -%}
{% set cert_file = "%s/%s.pem"|format(kube_cert_dir, cert) %}

4
roles/kubernetes/secrets/tasks/gen_certs_script.yml
View file

@ -73,6 +73,8 @@
'kube-scheduler-key.pem',
'kube-controller-manager.pem',
'kube-controller-manager-key.pem',
'front-proxy-ca.pem',
'front-proxy-ca-key.pem',
'front-proxy-client.pem',
'front-proxy-client-key.pem',
'service-account-key.pem',
@ -85,6 +87,8 @@
'admin-{{ inventory_hostname }}-key.pem',
'apiserver.pem',
'apiserver-key.pem',
'front-proxy-ca.pem',
'front-proxy-ca-key.pem',
'front-proxy-client.pem',
'front-proxy-client-key.pem',
'service-account-key.pem',

4
roles/kubernetes/secrets/tasks/gen_certs_vault.yml
View file

@ -98,6 +98,8 @@
- include_tasks: ../../../vault/tasks/shared/issue_cert.yml
vars:
issue_cert_common_name: "front-proxy-client"
issue_cert_copy_ca: "{{ item == kube_front_proxy_clients_certs_needed|first }}"
issue_cert_ca_filename: front-proxy-ca.pem
issue_cert_alt_names: "{{ kube_cert_alt_names }}"
issue_cert_file_group: "{{ kube_cert_group }}"
issue_cert_file_owner: kube
@ -115,7 +117,7 @@
issue_cert_path: "{{ item }}"
issue_cert_role: front-proxy-client
issue_cert_url: "{{ hostvars[groups.vault|first]['vault_leader_url'] }}"
issue_cert_mount_path: "{{ kube_vault_mount_path }}"
issue_cert_mount_path: "{{ front_proxy_vault_mount_path }}"
with_items: "{{ kube_front_proxy_clients_certs_needed|d([]) }}"
when: inventory_hostname in groups['kube-master']
notify: set secret_changed

12
roles/kubernetes/secrets/tasks/sync_kube_master_certs.yml
View file

@ -44,6 +44,18 @@
set_fact:
sync_file_results: []
- include_tasks: ../../../vault/tasks/shared/sync_file.yml
vars:
sync_file: front-proxy-ca.pem
sync_file_dir: "{{ kube_cert_dir }}"
sync_file_group: "{{ kube_cert_group }}"
sync_file_hosts: "{{ groups['kube-master'] }}"
sync_file_owner: kube
- name: sync_kube_master_certs | Unset sync_file_results after front-proxy-ca.pem
set_fact:
sync_file_results: []
- include_tasks: ../../../vault/tasks/shared/sync_file.yml
vars:
sync_file: "{{ item }}"

14
roles/vault/defaults/main.yml
View file

@ -97,6 +97,11 @@ vault_ca_options:
format: pem
ttl: "{{ vault_max_lease_ttl }}"
exclude_cn_from_sans: true
front_proxy:
common_name: front-proxy
format: pem
ttl: "{{ vault_max_lease_ttl }}"
exclude_cn_from_sans: true
vault_client_headers:
Accept: "application/json"
@ -164,9 +169,16 @@ vault_pki_mounts:
allow_any_name: true
enforce_hostnames: false
organization: "system:node-proxier"
front_proxy:
name: front-proxy
default_lease_ttl: "{{ vault_default_lease_ttl }}"
max_lease_ttl: "{{ vault_max_lease_ttl }}"
description: "Kubernetes Front Proxy CA"
cert_dir: "{{ vault_kube_cert_dir }}"
roles:
- name: front-proxy-client
group: k8s-cluster
password: "{{ lookup('password', inventory_dir + '/credentials/vault/kube-proxy.creds length=15') }}"
password: "{{ lookup('password', inventory_dir + '/credentials/vault/front-proxy-client.creds length=15') }}"
policy_rules: default
role_options:
allow_any_name: true

3
roles/vault/tasks/cluster/create_mounts.yml
View file

@ -6,8 +6,9 @@
create_mount_max_lease_ttl: "{{ item.max_lease_ttl }}"
create_mount_description: "{{ item.description }}"
create_mount_cert_dir: "{{ item.cert_dir }}"
create_mount_config_ca_needed: item.name != vault_pki_mounts.kube.name
create_mount_config_ca_needed: item.name != vault_pki_mounts.kube.name and item.name != vault_pki_mounts.front_proxy.name
with_items:
- "{{ vault_pki_mounts.vault }}"
- "{{ vault_pki_mounts.etcd }}"
- "{{ vault_pki_mounts.kube }}"
- "{{ vault_pki_mounts.front_proxy }}"

9
roles/vault/tasks/cluster/main.yml
View file

@ -35,6 +35,14 @@
gen_ca_copy_group: "kube-master"
when: inventory_hostname in groups.vault
- include_tasks: ../shared/gen_ca.yml
vars:
gen_ca_cert_dir: "{{ vault_pki_mounts.front_proxy.cert_dir }}"
gen_ca_mount_path: "{{ vault_pki_mounts.front_proxy.name }}"
gen_ca_vault_headers: "{{ vault_headers }}"
gen_ca_vault_options: "{{ vault_ca_options.front_proxy }}"
when: inventory_hostname in groups.vault
- include_tasks: ../shared/auth_backend.yml
vars:
auth_backend_description: A Username/Password Auth Backend primarily used for services needing to issue certificates
@ -47,6 +55,7 @@
- "{{ vault_pki_mounts.vault }}"
- "{{ vault_pki_mounts.etcd }}"
- "{{ vault_pki_mounts.kube }}"
- "{{ vault_pki_mounts.front_proxy }}"
loop_control:
loop_var: mount
when: inventory_hostname in groups.vault

3
roles/vault/tasks/shared/issue_cert.yml
View file

@ -6,6 +6,7 @@
# issue_cert_alt_name: Requested Subject Alternative Names, in a list.
# issue_cert_common_name: Common Name included in the cert
# issue_cert_copy_ca: Copy issuing CA cert needed
# issue_cert_ca_filename: Filename for copied issuing CA cert (default ca.pem)
# issue_cert_dir_mode: Mode of the placed cert directory
# issue_cert_file_group: Group of the placed cert file and directory
# issue_cert_file_mode: Mode of the placed cert file
@ -100,7 +101,7 @@
- name: issue_cert | Copy issuing CA cert
copy:
content: "{{ issue_cert_result['json']['data']['issuing_ca'] }}\n"
dest: "{{ issue_cert_path | dirname }}/ca.pem"
dest: "{{ issue_cert_path | dirname }}/{{ issue_cert_ca_filename | default('ca.pem') }}"
group: "{{ issue_cert_file_group | d('root' )}}"
mode: "{{ issue_cert_file_mode | d('0644') }}"
owner: "{{ issue_cert_file_owner | d('root') }}"