diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml index 18bedc7c9..8dcc18acf 100644 --- a/.gitlab-ci.yml +++ b/.gitlab-ci.yml @@ -299,12 +299,24 @@ before_script: UPGRADE_TEST: "graceful" STARTUP_SCRIPT: "" +.centos_weave_kubeadm_variables: ¢os_weave_kubeadm_variables +# stage: deploy-gce-part1 + KUBE_NETWORK_PLUGIN: weave + AUTHORIZATION_MODES: "{ 'authorization_modes': [ 'RBAC' ] }" + CLOUD_IMAGE: centos-7 + CLOUD_MACHINE_TYPE: "n1-standard-1" + CLOUD_REGION: us-central1-b + CLUSTER_MODE: ha + KUBEADM_ENABLED: "true" + UPGRADE_TEST: "graceful" + STARTUP_SCRIPT: "" + .ubuntu_canal_kubeadm_variables: &ubuntu_canal_kubeadm_variables # stage: deploy-gce-part1 KUBE_NETWORK_PLUGIN: canal AUTHORIZATION_MODES: "{ 'authorization_modes': [ 'RBAC' ] }" CLOUD_IMAGE: ubuntu-1604-xenial - CLOUD_MACHINE_TYPE: "n1-standard-2" + CLOUD_MACHINE_TYPE: "n1-standard-1" CLOUD_REGION: europe-west1-b CLUSTER_MODE: ha KUBEADM_ENABLED: "true" @@ -521,6 +533,27 @@ ubuntu-canal-kubeadm-triggers: when: on_success only: ['triggers'] +centos-weave-kubeadm-rbac: + stage: deploy-gce-part1 + <<: *job + <<: *gce + variables: + <<: *gce_variables + <<: *centos_weave_kubeadm_variables + when: manual + except: ['triggers'] + only: ['master', /^pr-.*$/] + +centos-weave-kubeadm-triggers: + stage: deploy-gce-part1 + <<: *job + <<: *gce + variables: + <<: *gce_variables + <<: *centos_weave_kubeadm_variables + when: on_success + only: ['triggers'] + rhel7-weave: stage: deploy-gce-part1 <<: *job diff --git a/cluster.yml b/cluster.yml index 77030b0d3..bbb6813da 100644 --- a/cluster.yml +++ b/cluster.yml @@ -80,6 +80,7 @@ any_errors_fatal: "{{ any_errors_fatal | default(true) }}" roles: - { role: kubespray-defaults} + - { role: kubernetes-apps/rotate_tokens, tags: rotate_tokens, when: "secret_changed|default(false)" } - { role: kubernetes-apps/network_plugin, tags: network } - { role: kubernetes-apps/policy_controller, tags: policy-controller } - { role: kubernetes/client, tags: client } diff --git a/docs/upgrades.md b/docs/upgrades.md index 9a21cbdc4..6f1d91317 100644 --- a/docs/upgrades.md +++ b/docs/upgrades.md @@ -67,3 +67,17 @@ follows: * network_plugin (such as Calico or Weave) * kube-apiserver, kube-scheduler, and kube-controller-manager * Add-ons (such as KubeDNS) + +#### Upgrade considerations + +Kubespray supports rotating certificates used for etcd and Kubernetes +components, but some manual steps may be required. If you have a pod that +requires use of a service token and is deployed in a namespace other than +`kube-system`, you will need to manually delete the affected pods after +rotating certificates. This is because all service account tokens are dependent +on the apiserver token that is used to generate them. When the certificate +rotates, all service account tokens must be rotated as well. During the +kubernetes-apps/rotate_tokens role, only pods in kube-system are destroyed and +recreated. All other invalidated service account tokens are cleaned up +automatically, but other pods are not deleted out of an abundance of caution +for impact to user deployed pods. diff --git a/roles/download/defaults/main.yml b/roles/download/defaults/main.yml index a310b0799..42f9424a1 100644 --- a/roles/download/defaults/main.yml +++ b/roles/download/defaults/main.yml @@ -20,7 +20,7 @@ download_always_pull: False # Versions kube_version: v1.7.5 # Change to kube_version after v1.8.0 release -kubeadm_version: "v1.8.0-beta.1" +kubeadm_version: "v1.8.0-rc.1" etcd_version: v3.2.4 # TODO(mattymo): Move calico versions to roles/network_plugins/calico/defaults # after migration to container download @@ -37,7 +37,7 @@ pod_infra_version: 3.0 kubeadm_download_url: "https://storage.googleapis.com/kubernetes-release/release/{{ kubeadm_version }}/bin/linux/amd64/kubeadm" # Checksums -kubeadm_checksum: "ddd5949699d6bdbc0b90b379e7e534f137b1058db1acc8f26cc54843f017ffbf" +kubeadm_checksum: "8f6ceb26b8503bfc36a99574cf6f853be1c55405aa31669561608ad8099bf5bf" # Containers etcd_image_repo: "quay.io/coreos/etcd" @@ -123,7 +123,7 @@ downloads: container: true repo: "{{ etcd_image_repo }}" tag: "{{ etcd_image_tag }}" - sha256: "{{etcd_digest_checksum|default(None)}}" + sha256: "{{ etcd_digest_checksum|default(None) }}" kubeadm: version: "{{ kubeadm_version }}" dest: "kubeadm" diff --git a/roles/kubernetes-apps/ansible/tasks/main.yml b/roles/kubernetes-apps/ansible/tasks/main.yml index 7771a91c3..9e9a30382 100644 --- a/roles/kubernetes-apps/ansible/tasks/main.yml +++ b/roles/kubernetes-apps/ansible/tasks/main.yml @@ -8,7 +8,17 @@ delay: 6 when: inventory_hostname == groups['kube-master'][0] -- name: kubeadm | Delete kubeadm kubedns +- name: Kubernetes Apps | Delete old kubedns resources + kube: + name: "kubedns" + namespace: "{{ system_namespace }}" + kubectl: "{{bin_dir}}/kubectl" + resource: "{{ item }}" + state: absent + with_items: ['deploy', 'svc'] + tags: upgrade + +- name: Kubernetes Apps | Delete kubeadm kubedns kube: name: "kubedns" namespace: "{{ system_namespace }}" @@ -25,9 +35,9 @@ src: "{{item.file}}" dest: "{{kube_config_dir}}/{{item.file}}" with_items: - - {name: kubedns, file: kubedns-sa.yml, type: sa} - - {name: kubedns, file: kubedns-deploy.yml.j2, type: deployment} - - {name: kubedns, file: kubedns-svc.yml, type: svc} + - {name: kube-dns, file: kubedns-sa.yml, type: sa} + - {name: kube-dns, file: kubedns-deploy.yml.j2, type: deployment} + - {name: kube-dns, file: kubedns-svc.yml, type: svc} - {name: kubedns-autoscaler, file: kubedns-autoscaler-sa.yml, type: sa} - {name: kubedns-autoscaler, file: kubedns-autoscaler-clusterrole.yml, type: clusterrole} - {name: kubedns-autoscaler, file: kubedns-autoscaler-clusterrolebinding.yml, type: clusterrolebinding} diff --git a/roles/kubernetes-apps/network_plugin/weave/tasks/main.yml b/roles/kubernetes-apps/network_plugin/weave/tasks/main.yml index 3b01d0e66..66d900d55 100644 --- a/roles/kubernetes-apps/network_plugin/weave/tasks/main.yml +++ b/roles/kubernetes-apps/network_plugin/weave/tasks/main.yml @@ -1,15 +1,4 @@ --- -# FIXME: remove if kubernetes/features#124 is implemented -- name: Weave | Purge old weave daemonset - kube: - name: "weave-net" - kubectl: "{{ bin_dir }}/kubectl" - filename: "{{ kube_config_dir }}/weave-net.yml" - resource: "ds" - namespace: "{{system_namespace}}" - state: absent - when: inventory_hostname == groups['kube-master'][0] and weave_manifest.changed - - name: Weave | Start Resources kube: name: "weave-net" diff --git a/roles/kubernetes-apps/rotate_tokens/tasks/main.yml b/roles/kubernetes-apps/rotate_tokens/tasks/main.yml new file mode 100644 index 000000000..6f54ff927 --- /dev/null +++ b/roles/kubernetes-apps/rotate_tokens/tasks/main.yml @@ -0,0 +1,20 @@ +--- +#FIXME(mattymo): Exclude built in secrets that were automatically rotated, +#instead of filtering manually +- name: Rotate Tokens | Get all serviceaccount tokens to expire + shell: >- + {{ bin_dir }}/kubectl get secrets --all-namespaces + -o 'jsonpath={range .items[*]}{"\n"}{.metadata.namespace}{" "}{.metadata.name}{" "}{.type}{end}' + | grep kubernetes.io/service-account-token + | egrep 'default-token|kube-proxy|kube-dns|dnsmasq|netchecker|weave|calico|canal|flannel|dashboard|cluster-proportional-autoscaler|efk|tiller' + register: tokens_to_delete + run_once: true + +- name: Rotate Tokens | Delete expired tokens + command: "{{ bin_dir }}/kubectl delete secrets -n {{ item.split(' ')[0] }} {{ item.split(' ')[1] }}" + with_items: "{{ tokens_to_delete.stdout_lines }}" + run_once: true + +- name: Rotate Tokens | Delete pods in system namespace + command: "{{ bin_dir }}/kubectl delete pods -n {{ system_namespace }} --all" + run_once: true diff --git a/roles/kubernetes/kubeadm/tasks/main.yml b/roles/kubernetes/kubeadm/tasks/main.yml index 3da0b6707..3eae97a4c 100644 --- a/roles/kubernetes/kubeadm/tasks/main.yml +++ b/roles/kubernetes/kubeadm/tasks/main.yml @@ -24,7 +24,7 @@ register: kubeadm_client_conf - name: Join to cluster if needed - command: kubeadm join --config {{ kube_config_dir}}/kubeadm-client.conf --skip-preflight-checks + command: "{{ bin_dir }}/kubeadm join --config {{ kube_config_dir}}/kubeadm-client.conf --skip-preflight-checks" register: kubeadm_join when: not is_kube_master and (kubeadm_client_conf.changed or not kubelet_conf.stat.exists) diff --git a/roles/kubernetes/master/tasks/kubeadm-cleanup-old-certs.yml b/roles/kubernetes/master/tasks/kubeadm-cleanup-old-certs.yml new file mode 100644 index 000000000..e1e85e205 --- /dev/null +++ b/roles/kubernetes/master/tasks/kubeadm-cleanup-old-certs.yml @@ -0,0 +1,3 @@ +--- +- name: kubeadm | Purge old certs + command: "rm -f {{kube_cert_dir }}/*.pem" diff --git a/roles/kubernetes/master/tasks/kubeadm-migrate-certs.yml b/roles/kubernetes/master/tasks/kubeadm-migrate-certs.yml new file mode 100644 index 000000000..3120126ae --- /dev/null +++ b/roles/kubernetes/master/tasks/kubeadm-migrate-certs.yml @@ -0,0 +1,12 @@ +--- +- name: Copy old certs to the kubeadm expected path + copy: + src: "{{ kube_cert_dir }}/{{ item.src }}" + dest: "{{ kube_cert_dir }}/{{ item.dest }}" + remote_src: yes + with_items: + - {src: apiserver.pem, dest: apiserver.crt} + - {src: apiserver.pem, dest: apiserver.key} + - {src: ca.pem, dest: ca.crt} + - {src: ca-key.pem, dest: ca.key} + register: kubeadm_copy_old_certs diff --git a/roles/kubernetes/master/tasks/kubeadm-setup.yml b/roles/kubernetes/master/tasks/kubeadm-setup.yml index 03254e481..3533cb1bc 100644 --- a/roles/kubernetes/master/tasks/kubeadm-setup.yml +++ b/roles/kubernetes/master/tasks/kubeadm-setup.yml @@ -1,4 +1,35 @@ --- +- name: kubeadm | Check if old apiserver cert exists on host + stat: + path: "{{ kube_cert_dir }}/apiserver.pem" + register: old_apiserver_cert + delegate_to: "{{groups['kube-master']|first}}" + run_once: true + +- name: kubeadm | Check service account key + stat: + path: "{{ kube_cert_dir }}/sa.key" + register: sa_key_before + delegate_to: "{{groups['kube-master']|first}}" + run_once: true + +- name: kubeadm | Check if kubeadm has already run + stat: + path: "{{ kube_config_dir }}/admin.conf" + register: admin_conf + +- name: kubeadm | Delete old static pods + file: + path: "{{ kube_config_dir }}/manifests/{{item}}.manifest" + state: absent + with_items: ["kube-apiserver", "kube-controller-manager", "kube-scheduler", "kube-proxy"] + when: old_apiserver_cert.stat.exists + +- name: kubeadm | Forcefully delete old static pods + shell: "docker ps -f name=k8s_{{item}} -q | xargs --no-run-if-empty docker rm -f" + with_items: ["kube-apiserver", "kube-controller-manager", "kube-scheduler"] + when: old_apiserver_cert.stat.exists + - name: kubeadm | aggregate all SANs set_fact: apiserver_sans: >- @@ -29,18 +60,29 @@ dest: "{{ kube_config_dir }}/kubeadm-config.yaml" register: kubeadm_config -- name: Check if kubeadm has already run - stat: - path: "{{ kube_config_dir }}/admin.conf" - register: admin_conf - - - name: kubeadm | Initialize first master - command: timeout -k 240s 240s kubeadm init --config={{ kube_config_dir }}/kubeadm-config.yaml --skip-preflight-checks + command: timeout -k 240s 240s {{ bin_dir }}/kubeadm init --config={{ kube_config_dir }}/kubeadm-config.yaml --skip-preflight-checks register: kubeadm_init #Retry is because upload config sometimes fails retries: 3 - when: inventory_hostname == groups['kube-master']|first and (kubeadm_config.changed or not admin_conf.stat.exists) + when: inventory_hostname == groups['kube-master']|first and not admin_conf.stat.exists + failed_when: kubeadm_init.rc != 0 and "field is immutable" not in kubeadm_init.stderr + notify: Master | restart kubelet + +- name: kubeadm | Upgrade first master + command: timeout -k 240s 240s {{ bin_dir }}/kubeadm upgrade apply --config={{ kube_config_dir }}/kubeadm-config.yaml {{ kube_version }} --skip-preflight-checks + register: kubeadm_upgrade + #Retry is because upload config sometimes fails + retries: 3 + when: inventory_hostname == groups['kube-master']|first and (kubeadm_config.changed and admin_conf.stat.exists) + failed_when: kubeadm_upgrade.rc != 0 and "field is immutable" not in kubeadm_upgrade.stderr + notify: Master | restart kubelet + +# FIXME(mattymo): remove when https://github.com/kubernetes/kubeadm/issues/433 is fixed +- name: kubeadm | Enable kube-proxy + command: "{{ bin_dir }}/kubeadm alpha phase addon kube-proxy --config={{ kube_config_dir }}/kubeadm-config.yaml" + when: inventory_hostname == groups['kube-master']|first + changed_when: false - name: slurp kubeadm certs slurp: @@ -62,7 +104,7 @@ delegate_to: "{{ groups['kube-master']|first }}" run_once: true -- name: write out kubeadm certs +- name: kubeadm | write out kubeadm certs copy: dest: "{{ item.item }}" content: "{{ item.content | b64decode }}" @@ -74,9 +116,32 @@ with_items: "{{ kubeadm_certs.results }}" when: inventory_hostname != groups['kube-master']|first -- name: kubeadm | Initialize other masters - command: timeout -k 240s 240s kubeadm init --config={{ kube_config_dir }}/kubeadm-config.yaml --skip-preflight-checks +- name: kubeadm | Init other uninitialized masters + command: timeout -k 240s 240s {{ bin_dir }}/kubeadm init --config={{ kube_config_dir }}/kubeadm-config.yaml --skip-preflight-checks register: kubeadm_init - #Retry is because upload config sometimes fails - retries: 3 - when: inventory_hostname != groups['kube-master']|first and (kubeadm_config.changed or not admin_conf.stat.exists or copy_kubeadm_certs.changed) + when: inventory_hostname != groups['kube-master']|first and not admin_conf.stat.exists + failed_when: kubeadm_init.rc != 0 and "field is immutable" not in kubeadm_init.stderr + notify: Master | restart kubelet + +- name: kubeadm | Upgrade other masters + command: timeout -k 240s 240s {{ bin_dir }}/kubeadm upgrade apply --config={{ kube_config_dir }}/kubeadm-config.yaml {{ kube_version }} --skip-preflight-checks + register: kubeadm_upgrade + when: inventory_hostname != groups['kube-master']|first and (kubeadm_config.changed and admin_conf.stat.exists) + failed_when: kubeadm_upgrade.rc != 0 and "field is immutable" not in kubeadm_upgrade.stderr + notify: Master | restart kubelet + +- name: kubeadm | Check service account key again + stat: + path: "{{ kube_cert_dir }}/sa.key" + register: sa_key_after + delegate_to: "{{groups['kube-master']|first}}" + run_once: true + +- name: kubeadm | Set secret_changed if service account key was updated + command: /bin/true + notify: Master | set secret_changed + when: sa_key_before.stat.checksum|default("") != sa_key_after.stat.checksum + +- name: kubeadm | cleanup old certs if necessary + include: kubeadm-cleanup-old-certs.yml + when: old_apiserver_cert.stat.exists diff --git a/roles/kubernetes/master/templates/kubeadm-config.yaml.j2 b/roles/kubernetes/master/templates/kubeadm-config.yaml.j2 index 7e906efa9..c8dfd9524 100644 --- a/roles/kubernetes/master/templates/kubeadm-config.yaml.j2 +++ b/roles/kubernetes/master/templates/kubeadm-config.yaml.j2 @@ -17,7 +17,6 @@ networking: podSubnet: {{ kube_pods_subnet }} kubernetesVersion: {{ kube_version }} cloudProvider: {{ cloud_provider|default('') }} -#TODO: cloud provider conf file authorizationModes: - Node {% for mode in authorization_modes %} @@ -53,7 +52,6 @@ apiServerExtraArgs: runtime-config: {{ kube_api_runtime_config }} {% endif %} allow-privileged: "true" -#TODO: Custom flags compatible with kubeadm controllerManagerExtraArgs: node-monitor-grace-period: {{ kube_controller_node_monitor_grace_period }} node-monitor-period: {{ kube_controller_node_monitor_period }} @@ -61,7 +59,6 @@ controllerManagerExtraArgs: {% if kube_feature_gates %} feature-gates: {{ kube_feature_gates|join(',') }} {% endif %} -#schedulerExtraArgs: apiServerCertSANs: {% for san in apiserver_sans.split(' ') | unique %} - {{ san }} diff --git a/roles/kubernetes/node/tasks/install.yml b/roles/kubernetes/node/tasks/install.yml index 20d542da8..d4401c236 100644 --- a/roles/kubernetes/node/tasks/install.yml +++ b/roles/kubernetes/node/tasks/install.yml @@ -19,12 +19,20 @@ when: kubeadm_enabled tags: kubeadm -- name: install | Copy binary from download dir +- name: install | Copy kubeadm binary from download dir command: rsync -piu "{{ local_release_dir }}/kubeadm" "{{ bin_dir }}/kubeadm" changed_when: false when: kubeadm_enabled tags: kubeadm +- name: install | Set kubeadm binary permissions + file: + path: "{{ bin_dir }}/kubeadm" + mode: "0755" + state: file + when: kubeadm_enabled + tags: kubeadm + - include: "install_{{ kubelet_deployment_type }}.yml" - name: install | Write kubelet systemd init file diff --git a/roles/kubernetes/node/tasks/main.yml b/roles/kubernetes/node/tasks/main.yml index 411149098..b12b2348e 100644 --- a/roles/kubernetes/node/tasks/main.yml +++ b/roles/kubernetes/node/tasks/main.yml @@ -96,6 +96,13 @@ when: not kubeadm_enabled tags: kube-proxy +- name: Purge proxy manifest for kubeadm + file: + path: "{{ kube_manifest_dir }}/kube-proxy.manifest" + state: absent + when: kubeadm_enabled + tags: kube-proxy + # reload-systemd - meta: flush_handlers diff --git a/roles/reset/tasks/main.yml b/roles/reset/tasks/main.yml index 59251b02b..2d72f0b25 100644 --- a/roles/reset/tasks/main.yml +++ b/roles/reset/tasks/main.yml @@ -75,6 +75,7 @@ with_items: - "{{kube_config_dir}}" - /var/lib/kubelet + - /root/.kube - "{{ etcd_data_dir }}" - /etc/ssl/etcd - /var/log/calico diff --git a/tests/testcases/030_check-network.yml b/tests/testcases/030_check-network.yml index 7269dab35..2fa78545f 100644 --- a/tests/testcases/030_check-network.yml +++ b/tests/testcases/030_check-network.yml @@ -13,12 +13,20 @@ when: not ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] + - name: Wait for pods to be ready + shell: "{{bin_dir}}/kubectl get pods" + register: pods + until: + - '"ContainerCreating" not in pods.stdout' + - '"Pending" not in pods.stdout' + - '"Terminating" not in pods.stdout' + retries: 60 + delay: 2 + no_log: true + - name: Get pod names shell: "{{bin_dir}}/kubectl get pods -o json" register: pods - until: '"ContainerCreating" not in pods.stdout and "Terminating" not in pods.stdout' - retries: 60 - delay: 2 no_log: true - name: Get hostnet pods diff --git a/upgrade-cluster.yml b/upgrade-cluster.yml index b83681525..28261027f 100644 --- a/upgrade-cluster.yml +++ b/upgrade-cluster.yml @@ -67,7 +67,6 @@ - { role: kubernetes/node, tags: node } - { role: kubernetes/master, tags: master } - { role: network_plugin, tags: network } - - { role: kubernetes/kubeadm, tags: kubeadm, when: "kubeadm_enabled" } - { role: upgrade/post-upgrade, tags: post-upgrade } #Finally handle worker upgrades, based on given batch size @@ -87,6 +86,7 @@ any_errors_fatal: true roles: - { role: kubespray-defaults} + - { role: kubernetes-apps/rotate_tokens, tags: rotate_tokens, when: "secret_changed|default(false)" } - { role: kubernetes-apps/network_plugin, tags: network } - { role: kubernetes-apps/policy_controller, tags: policy-controller } - { role: kubernetes/client, tags: client }