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kubespray/docs/upgrades.md

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# Upgrading Kubernetes in Kubespray
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rename almost all mentions of kargo
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Kubespray handles upgrades the same way it handles initial deployment. That is to
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say that each component is laid down in a fixed order.
You can also individually control versions of components by explicitly defining their
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versions. Here are all version vars for each component:
* docker_version
Set containerd version to 1.4.4 (#7398) * Set containerd version to 1.4.3 * Set containerd version to 1.4.4 Co-authored-by: Barry Melbourne <9964974+bmelbourne@users.noreply.github.com>
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* containerd_version
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* kube_version
* etcd_version
* calico_version
* calico_cni_version
* weave_version
* flannel_version
* kubedns_version
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:warning: [Attempting to upgrade from an older release straight to the latest release is unsupported and likely to break something](https://github.com/kubernetes-sigs/kubespray/issues/3849#issuecomment-451386515) :warning:
Update upgrades.md (#7361) upgrades.md explains how to do upgrade from v1.4.3 to v1.4.6 as an example. The versions are a little old, and the doc readers would have a concern the upgrade works fine or not. This updates versions after verifying the way works fine by hands.
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See [Multiple Upgrades](#multiple-upgrades) for how to upgrade from older Kubespray release to the latest release
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## Unsafe upgrade example
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Update upgrades.md (#7361) upgrades.md explains how to do upgrade from v1.4.3 to v1.4.6 as an example. The versions are a little old, and the doc readers would have a concern the upgrade works fine or not. This updates versions after verifying the way works fine by hands.
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If you wanted to upgrade just kube_version from v1.18.10 to v1.19.7, you could
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deploy the following way:
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```ShellSession
Update upgrades.md (#7361) upgrades.md explains how to do upgrade from v1.4.3 to v1.4.6 as an example. The versions are a little old, and the doc readers would have a concern the upgrade works fine or not. This updates versions after verifying the way works fine by hands.
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ansible-playbook cluster.yml -i inventory/sample/hosts.ini -e kube_version=v1.18.10 -e upgrade_cluster_setup=true
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```
Update upgrades.md (#7361) upgrades.md explains how to do upgrade from v1.4.3 to v1.4.6 as an example. The versions are a little old, and the doc readers would have a concern the upgrade works fine or not. This updates versions after verifying the way works fine by hands.
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And then repeat with v1.19.7 as kube_version:
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```ShellSession
Update upgrades.md (#7361) upgrades.md explains how to do upgrade from v1.4.3 to v1.4.6 as an example. The versions are a little old, and the doc readers would have a concern the upgrade works fine or not. This updates versions after verifying the way works fine by hands.
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ansible-playbook cluster.yml -i inventory/sample/hosts.ini -e kube_version=v1.19.7 -e upgrade_cluster_setup=true
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```
UPdate docs to match actuall required settings to perform an unsafe upgrade using cluster.yml playbook. Relates to https://github.com/kubernetes-sigs/kubespray/issues/4736 and https://github.com/kubernetes-sigs/kubespray/issues/4139 (#5609)
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The var ```-e upgrade_cluster_setup=true``` is needed to be set in order to migrate the deploys of e.g kube-apiserver inside the cluster immediately which is usually only done in the graceful upgrade. (Refer to [#4139](https://github.com/kubernetes-sigs/kubespray/issues/4139) and [#4736](https://github.com/kubernetes-sigs/kubespray/issues/4736))
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## Graceful upgrade
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Kubespray also supports cordon, drain and uncordoning of nodes when performing
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a cluster upgrade. There is a separate playbook used for this purpose. It is
important to note that upgrade-cluster.yml can only be used for upgrading an
Replace kube-master with kube_control_plane (#7256) This replaces kube-master with kube_control_plane because of [1]: The Kubernetes project is moving away from wording that is considered offensive. A new working group WG Naming was created to track this work, and the word "master" was declared as offensive. A proposal was formalized for replacing the word "master" with "control plane". This means it should be removed from source code, documentation, and user-facing configuration from Kubernetes and its sub-projects. NOTE: The reason why this changes it to kube_control_plane not kube-control-plane is for valid group names on ansible. [1]: https://github.com/kubernetes/enhancements/blob/master/keps/sig-cluster-lifecycle/kubeadm/2067-rename-master-label-taint/README.md#motivation
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existing cluster. That means there must be at least 1 kube_control_plane already
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deployed.
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```ShellSession
Update upgrades.md (#7361) upgrades.md explains how to do upgrade from v1.4.3 to v1.4.6 as an example. The versions are a little old, and the doc readers would have a concern the upgrade works fine or not. This updates versions after verifying the way works fine by hands.
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ansible-playbook upgrade-cluster.yml -b -i inventory/sample/hosts.ini -e kube_version=v1.19.7
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```
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After a successful upgrade, the Server Version should be updated:
Update upgrades.md Clarify that the `kube_version` environment variable is needed for the CLI "graceful upgrade". Also add and example to check that the upgrade was successful.
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```ShellSession
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$ kubectl version
Update upgrades.md (#7361) upgrades.md explains how to do upgrade from v1.4.3 to v1.4.6 as an example. The versions are a little old, and the doc readers would have a concern the upgrade works fine or not. This updates versions after verifying the way works fine by hands.
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Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.7", GitCommit:"1dd5338295409edcfff11505e7bb246f0d325d15", GitTreeState:"clean", BuildDate:"2021-01-13T13:23:52Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.7", GitCommit:"1dd5338295409edcfff11505e7bb246f0d325d15", GitTreeState:"clean", BuildDate:"2021-01-13T13:15:20Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"linux/amd64"}
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```
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If you want to manually control the upgrade procedure, you can use the variables `upgrade_node_confirm` or `upgrade_node_pause_seconds`:
`upgrade_node_confirm: true` - waiting to confirmation to upgrade next node
`upgrade_node_pause_seconds: 60` - pause 60 seconds before upgrade next node
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## Multiple upgrades
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:warning: [Do not skip releases when upgrading--upgrade by one tag at a time.](https://github.com/kubernetes-sigs/kubespray/issues/3849#issuecomment-451386515) :warning:
For instance, if you're on v2.6.0, then check out v2.7.0, run the upgrade, check out the next tag, and run the next upgrade, etc.
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Assuming you don't explicitly define a kubernetes version in your k8s_cluster.yml, you simply check out the next tag and run the upgrade-cluster.yml playbook
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* If you do define kubernetes version in your inventory (e.g. group_vars/k8s_cluster.yml) then either make sure to update it before running upgrade-cluster, or specify the new version you're upgrading to: `ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml -e kube_version=v1.11.3`
UPdate docs to match actuall required settings to perform an unsafe upgrade using cluster.yml playbook. Relates to https://github.com/kubernetes-sigs/kubespray/issues/4736 and https://github.com/kubernetes-sigs/kubespray/issues/4139 (#5609)
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Otherwise, the upgrade will leave your cluster at the same k8s version defined in your inventory vars.
The below example shows taking a cluster that was set up for v2.6.0 up to v2.10.0
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```ShellSession
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$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 1h v1.10.4
boomer Ready master,node 42m v1.10.4
caprica Ready master,node 42m v1.10.4
$ git describe --tags
v2.6.0
$ git tag
...
v2.6.0
v2.7.0
v2.8.0
v2.8.1
v2.8.2
...
$ git checkout v2.7.0
Previous HEAD position was 8b3ce6e4 bump upgrade tests to v2.5.0 commit (#3087)
HEAD is now at 05dabb7e Fix Bionic networking restart error #3430 (#3431)
# NOTE: May need to sudo pip3 install -r requirements.txt when upgrading.
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ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
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...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 1h v1.11.3
boomer Ready master,node 1h v1.11.3
caprica Ready master,node 1h v1.11.3
$ git checkout v2.8.0
Previous HEAD position was 05dabb7e Fix Bionic networking restart error #3430 (#3431)
HEAD is now at 9051aa52 Fix ubuntu-contiv test failed (#3808)
```
:info: NOTE: Review changes between the sample inventory and your inventory when upgrading versions. :info:
Some deprecations between versions that mean you can't just upgrade straight from 2.7.0 to 2.8.0 if you started with the sample inventory.
In this case, I set "kubeadm_enabled" to false, knowing that it is deprecated and removed by 2.9.0, to delay converting the cluster to kubeadm as long as I could.
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```ShellSession
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$ ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
...
"msg": "DEPRECATION: non-kubeadm deployment is deprecated from v2.9. Will be removed in next release."
...
Are you sure you want to deploy cluster using the deprecated non-kubeadm mode. (output is hidden):
yes
...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 114m v1.12.3
boomer Ready master,node 114m v1.12.3
caprica Ready master,node 114m v1.12.3
$ git checkout v2.8.1
Previous HEAD position was 9051aa52 Fix ubuntu-contiv test failed (#3808)
HEAD is now at 2ac1c756 More Feature/2.8 backports for 2.8.1 (#3911)
$ ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
...
"msg": "DEPRECATION: non-kubeadm deployment is deprecated from v2.9. Will be removed in next release."
...
Are you sure you want to deploy cluster using the deprecated non-kubeadm mode. (output is hidden):
yes
...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 2h36m v1.12.4
boomer Ready master,node 2h36m v1.12.4
caprica Ready master,node 2h36m v1.12.4
$ git checkout v2.8.2
Previous HEAD position was 2ac1c756 More Feature/2.8 backports for 2.8.1 (#3911)
HEAD is now at 4167807f Upgrade to 1.12.5 (#4066)
$ ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
...
"msg": "DEPRECATION: non-kubeadm deployment is deprecated from v2.9. Will be removed in next release."
...
Are you sure you want to deploy cluster using the deprecated non-kubeadm mode. (output is hidden):
yes
...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 3h3m v1.12.5
boomer Ready master,node 3h3m v1.12.5
caprica Ready master,node 3h3m v1.12.5
$ git checkout v2.8.3
Previous HEAD position was 4167807f Upgrade to 1.12.5 (#4066)
HEAD is now at ea41fc5e backport cve-2019-5736 to release-2.8 (#4234)
$ ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
...
"msg": "DEPRECATION: non-kubeadm deployment is deprecated from v2.9. Will be removed in next release."
...
Are you sure you want to deploy cluster using the deprecated non-kubeadm mode. (output is hidden):
yes
...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 5h18m v1.12.5
boomer Ready master,node 5h18m v1.12.5
caprica Ready master,node 5h18m v1.12.5
$ git checkout v2.8.4
Previous HEAD position was ea41fc5e backport cve-2019-5736 to release-2.8 (#4234)
HEAD is now at 3901480b go to k8s 1.12.7 (#4400)
$ ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
...
"msg": "DEPRECATION: non-kubeadm deployment is deprecated from v2.9. Will be removed in next release."
...
Are you sure you want to deploy cluster using the deprecated non-kubeadm mode. (output is hidden):
yes
...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 5h37m v1.12.7
boomer Ready master,node 5h37m v1.12.7
caprica Ready master,node 5h37m v1.12.7
$ git checkout v2.8.5
Previous HEAD position was 3901480b go to k8s 1.12.7 (#4400)
HEAD is now at 6f97687d Release 2.8 robust san handling (#4478)
$ ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
...
"msg": "DEPRECATION: non-kubeadm deployment is deprecated from v2.9. Will be removed in next release."
...
Are you sure you want to deploy cluster using the deprecated non-kubeadm mode. (output is hidden):
yes
...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 5h45m v1.12.7
boomer Ready master,node 5h45m v1.12.7
caprica Ready master,node 5h45m v1.12.7
$ git checkout v2.9.0
Previous HEAD position was 6f97687d Release 2.8 robust san handling (#4478)
HEAD is now at a4e65c7c Upgrade to Ansible >2.7.0 (#4471)
```
Rename ansible groups to use _ instead of - (#7552) * rename ansible groups to use _ instead of - k8s-cluster -> k8s_cluster k8s-node -> k8s_node calico-rr -> calico_rr no-floating -> no_floating Note: kube-node,k8s-cluster groups in upgrade CI need clean-up after v2.16 is tagged * ensure old groups are mapped to the new ones
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:warning: IMPORTANT: Some of the variable formats changed in the k8s_cluster.yml between 2.8.5 and 2.9.0 :warning:
Clarify process for upgrading more than one version (#5264) Since it is unsupported to skip upgrades, I've detailed the steps for upgrading a step at a time and removed some language that indicated it should work
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If you do not keep your inventory copy up to date, **your upgrade will fail** and your first master will be left non-functional until fixed and re-run.
It is at this point the cluster was upgraded from non-kubeadm to kubeadm as per the deprecation warning.
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```ShellSession
ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
Clarify process for upgrading more than one version (#5264) Since it is unsupported to skip upgrades, I've detailed the steps for upgrading a step at a time and removed some language that indicated it should work
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...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 6h54m v1.13.5
boomer Ready master,node 6h55m v1.13.5
caprica Ready master,node 6h54m v1.13.5
# Watch out: 2.10.0 is hiding between 2.1.2 and 2.2.0
$ git tag
...
v2.1.0
v2.1.1
v2.1.2
v2.10.0
v2.2.0
...
$ git checkout v2.10.0
Previous HEAD position was a4e65c7c Upgrade to Ansible >2.7.0 (#4471)
HEAD is now at dcd9c950 Add etcd role dependency on kube user to avoid etcd role failure when running scale.yml with a fresh node. (#3240) (#4479)
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ansible-playbook -i inventory/mycluster/hosts.ini -b upgrade-cluster.yml
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...
$ kubectl get node
NAME STATUS ROLES AGE VERSION
apollo Ready master,node 7h40m v1.14.1
boomer Ready master,node 7h40m v1.14.1
caprica Ready master,node 7h40m v1.14.1
```
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## Upgrade order
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As mentioned above, components are upgraded in the order in which they were
installed in the Ansible playbook. The order of component installation is as
follows:
Fixed Formatting / Ansbile-Playbook Command - added -b and fixed typo in ansible-playbook command - fixed formatting issue
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* Docker
Set containerd version to 1.4.4 (#7398) * Set containerd version to 1.4.3 * Set containerd version to 1.4.4 Co-authored-by: Barry Melbourne <9964974+bmelbourne@users.noreply.github.com>
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* Containerd
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* etcd
* kubelet and kube-proxy
* network_plugin (such as Calico or Weave)
* kube-apiserver, kube-scheduler, and kube-controller-manager
* Add-ons (such as KubeDNS)
Upgrade to kubeadm (#1667) * Enable upgrade to kubeadm * fix kubedns upgrade * try upgrade route * use init/upgrade strategy for kubeadm and ignore kubedns svc * Use bin_dir for kubeadm * delete more secrets * fix waiting for terminating pods * Manually enforce kube-proxy for kubeadm deploy * remove proxy. update to kubeadm 1.8.0rc1
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### Component-based upgrades
A deployer may want to upgrade specific components in order to minimize risk
or save time. This strategy is not covered by CI as of this writing, so it is
Update upgrades.md
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not guaranteed to work.
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These commands are useful only for upgrading fully-deployed, healthy, existing
hosts. This will definitely not work for undeployed or partially deployed
hosts.
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Upgrade docker:
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```ShellSession
add docker upgrade tag doc
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ansible-playbook -b -i inventory/sample/hosts.ini cluster.yml --tags=docker
```
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Upgrade etcd:
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```ShellSession
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ansible-playbook -b -i inventory/sample/hosts.ini cluster.yml --tags=etcd
```
Upgrade kubelet:
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```ShellSession
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ansible-playbook -b -i inventory/sample/hosts.ini cluster.yml --tags=node --skip-tags=k8s-gen-certs,k8s-gen-tokens
```
Upgrade Kubernetes master components:
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```ShellSession
Add tags to deploy components by --tags option (#2960) * Add tags for cert serial tasks This will help facilitate tag-based deployment of specific components. * fixup kubernetes node
2018-07-06 14:12:13 +08:00
ansible-playbook -b -i inventory/sample/hosts.ini cluster.yml --tags=master
```
Upgrade network plugins:
Add markdown CI (#5380)
2019-12-04 23:22:57 +08:00
```ShellSession
Add tags to deploy components by --tags option (#2960) * Add tags for cert serial tasks This will help facilitate tag-based deployment of specific components. * fixup kubernetes node
2018-07-06 14:12:13 +08:00
ansible-playbook -b -i inventory/sample/hosts.ini cluster.yml --tags=network
```
Upgrade all add-ons:
Add markdown CI (#5380)
2019-12-04 23:22:57 +08:00
```ShellSession
Add tags to deploy components by --tags option (#2960) * Add tags for cert serial tasks This will help facilitate tag-based deployment of specific components. * fixup kubernetes node
2018-07-06 14:12:13 +08:00
ansible-playbook -b -i inventory/sample/hosts.ini cluster.yml --tags=apps
```
Upgrade just helm (assuming `helm_enabled` is true):
Add markdown CI (#5380)
2019-12-04 23:22:57 +08:00
```ShellSession
Add tags to deploy components by --tags option (#2960) * Add tags for cert serial tasks This will help facilitate tag-based deployment of specific components. * fixup kubernetes node
2018-07-06 14:12:13 +08:00
ansible-playbook -b -i inventory/sample/hosts.ini cluster.yml --tags=helm
```