355 lines
10 KiB
Plaintext
355 lines
10 KiB
Plaintext
---
|
|
layout: docs
|
|
page_title: Upgrade An Existing Cluster to CRDs
|
|
description: >-
|
|
Upgrade an existing cluster to use custom resources.
|
|
---
|
|
|
|
# Upgrade An Existing Cluster to CRDs
|
|
|
|
Upgrading to consul-helm versions >= `0.30.0` will require some changes if
|
|
you utilize the following:
|
|
|
|
- [`connectInject.centralConfig.enabled`](#central-config-enabled)
|
|
- [`connectInject.centralConfig.defaultProtocol`](#default-protocol)
|
|
- [`connectInject.centralConfig.proxyDefaults`](#proxy-defaults)
|
|
- [`meshGateway.globalMode`](#mesh-gateway-mode)
|
|
- [Connect annotation `consul.hashicorp.com/connect-service-protocol`](#connect-service-protocol-annotation)
|
|
|
|
## Central Config Enabled
|
|
|
|
If you were previously setting `centralConfig.enabled` to `false`:
|
|
|
|
```yaml
|
|
connectInject:
|
|
centralConfig:
|
|
enabled: false
|
|
```
|
|
|
|
Then instead you must use `server.extraConfig` and `client.extraConfig`:
|
|
|
|
```yaml
|
|
client:
|
|
extraConfig: |
|
|
{"enable_central_service_config": false}
|
|
server:
|
|
extraConfig: |
|
|
{"enable_central_service_config": false}
|
|
```
|
|
|
|
If you were previously setting it to `true`, it now defaults to `true` so no
|
|
changes are required, but you can remove it from your config if you desire.
|
|
|
|
## Default Protocol
|
|
|
|
If you were previously setting:
|
|
|
|
```yaml
|
|
connectInject:
|
|
centralConfig:
|
|
defaultProtocol: 'http' # or any value
|
|
```
|
|
|
|
Now you must use [custom resources](/docs/k8s/crds) to manage the protocol for
|
|
new and existing services:
|
|
|
|
1. To upgrade, first ensure you're running Consul >= 1.9.0. See [Consul Version Upgrade](/docs/k8s/upgrade#consul-version-upgrade)
|
|
for more information on how to upgrade Consul versions.
|
|
|
|
This version is required to support custom resources.
|
|
|
|
1. Next, modify your Helm values:
|
|
1. Remove the `defaultProtocol` config. This won't affect existing services.
|
|
1. Set:
|
|
```yaml
|
|
controller:
|
|
enabled: true
|
|
```
|
|
1. Now you can upgrade your Helm chart to the latest version with the new Helm values.
|
|
1. From now on, any new service will require a [`ServiceDefaults`](/docs/connect/config-entries/service-defaults)
|
|
resource to set its protocol:
|
|
|
|
```yaml
|
|
apiVersion: consul.hashicorp.com/v1alpha1
|
|
kind: ServiceDefaults
|
|
metadata:
|
|
name: my-service-name
|
|
spec:
|
|
protocol: 'http'
|
|
```
|
|
|
|
1. Existing services will maintain their previously set protocol. If you wish to
|
|
change that protocol, you must migrate that service's `service-defaults` config
|
|
entry to a `ServiceDefaults` resource. See [Migrating Config Entries](#migrating-config-entries).
|
|
|
|
-> **Note:** This setting was removed because it didn't support changing the protocol after a service was first run and because it didn't work in secondary datacenters.
|
|
|
|
## Proxy Defaults
|
|
|
|
If you were previously setting:
|
|
|
|
```yaml
|
|
connectInject:
|
|
centralConfig:
|
|
proxyDefaults: |
|
|
{
|
|
"key": "value" // or any values
|
|
}
|
|
```
|
|
|
|
You will need to perform the following steps to upgrade:
|
|
|
|
1. You must remove the setting from your Helm values. This won't have any
|
|
effect on your existing cluster because this config is only read when
|
|
the cluster is **first created**.
|
|
1. You can then upgrade the Helm chart.
|
|
1. If you later wish to _change_ any of the proxy defaults settings, you will need
|
|
to follow the [Migrating Config Entries](#migrating-config-entries)
|
|
instructions for your `proxy-defaults` config entry.
|
|
|
|
This will require Consul >= 1.9.0.
|
|
|
|
-> **Note:** This setting was removed because it couldn't be changed after initial
|
|
installation.
|
|
|
|
## Mesh Gateway Mode
|
|
|
|
If you were previously setting:
|
|
|
|
```yaml
|
|
meshGateway:
|
|
globalMode: 'local' # or any value
|
|
```
|
|
|
|
You will need to perform the following steps to upgrade:
|
|
|
|
1. You must remove the setting from your Helm values. This won't have any
|
|
effect on your existing cluster because this config is only read when
|
|
the cluster is **first created**.
|
|
1. You can then upgrade the Helm chart.
|
|
1. If you later wish to _change_ the mode or any other setting in [`proxy-defaults`](/docs/connect/config-entries/proxy-defaults), you will need
|
|
to follow the [Migrating Config Entries](#migrating-config-entries)
|
|
instructions to migrate your `proxy-defaults` config entry to a `ProxyDefaults` resource.
|
|
|
|
This will require Consul >= 1.9.0.
|
|
|
|
-> **Note:** This setting was removed because it couldn't be changed after initial
|
|
installation.
|
|
|
|
## connect-service-protocol Annotation
|
|
|
|
If any of your Connect services had the `consul.hashicorp.com/connect-service-protocol`
|
|
annotation set, e.g.
|
|
|
|
```yaml
|
|
apiVersion: apps/v1
|
|
kind: Deployment
|
|
...
|
|
spec:
|
|
template:
|
|
metadata:
|
|
annotations:
|
|
"consul.hashicorp.com/connect-inject": "true"
|
|
"consul.hashicorp.com/connect-service-protocol": "http"
|
|
...
|
|
```
|
|
|
|
You will need to perform the following steps to upgrade:
|
|
|
|
1. Ensure you're running Consul >= 1.9.0. See [Consul Version Upgrade](/docs/k8s/upgrade#consul-version-upgrade)
|
|
for more information on how to upgrade Consul versions.
|
|
|
|
This version is required to support custom resources.
|
|
|
|
1. Next, remove this annotation from existing deployments. This will have no
|
|
effect on the deployments because the annotation was only used when the
|
|
service was first created.
|
|
1. Modify your Helm values and add:
|
|
|
|
```yaml
|
|
controller:
|
|
enabled: true
|
|
```
|
|
|
|
1. Now you can upgrade your Helm chart to the latest version.
|
|
1. From now on, any new service will require a [`ServiceDefaults`](/docs/connect/config-entries/service-defaults)
|
|
resource to set its protocol:
|
|
|
|
```yaml
|
|
apiVersion: consul.hashicorp.com/v1alpha1
|
|
kind: ServiceDefaults
|
|
metadata:
|
|
name: my-service-name
|
|
spec:
|
|
protocol: 'http'
|
|
```
|
|
|
|
1. Existing services will maintain their previously set protocol. If you wish to
|
|
change that protocol, you must migrate that service's `service-defaults` config
|
|
entry to a `ServiceDefaults` resource. See [Migrating Config Entries](#migrating-config-entries).
|
|
|
|
-> **Note:** The annotation was removed because it didn't support changing the protocol
|
|
and it wasn't supported in secondary datacenters.
|
|
|
|
## Migrating Config Entries
|
|
|
|
A config entry that already exists in Consul must be migrated into a Kubernetes custom resource in order to
|
|
manage it from Kubernetes:
|
|
|
|
1. Determine the `kind` and `name` of the config entry. For example, the protocol
|
|
would be set by a config entry with `kind: service-defaults` and `name` equal
|
|
to the name of the service.
|
|
|
|
In another example, a `proxy-defaults` config has `kind: proxy-defaults` and
|
|
`name: global`.
|
|
|
|
1. Once you've determined the `kind` and `name`, query Consul to get its contents:
|
|
|
|
```shell-session
|
|
$ consul config read -kind <kind> -name <name>
|
|
```
|
|
|
|
This will require `kubectl exec`'ing into a Consul server or client pod. If
|
|
you're using ACLs, you will also need an ACL token passed via the `-token` flag.
|
|
|
|
For example:
|
|
|
|
```shell-session
|
|
$ kubectl exec consul-server-0 -- consul config read -name foo -kind service-defaults
|
|
{
|
|
"Kind": "service-defaults",
|
|
"Name": "foo",
|
|
"Protocol": "http",
|
|
"MeshGateway": {},
|
|
"Expose": {},
|
|
"CreateIndex": 60,
|
|
"ModifyIndex": 60
|
|
}
|
|
```
|
|
|
|
1. Now we're ready to construct a Kubernetes resource for the config entry.
|
|
|
|
It will look something like:
|
|
|
|
```yaml
|
|
apiVersion: consul.hashicorp.com/v1alpha1
|
|
kind: ServiceDefaults
|
|
metadata:
|
|
name: foo
|
|
annotations:
|
|
'consul.hashicorp.com/migrate-entry': 'true'
|
|
spec:
|
|
protocol: 'http'
|
|
```
|
|
|
|
1. The `apiVersion` will always be `consul.hashicorp.com/v1alpha1`.
|
|
1. The `kind` will be the CamelCase version of the Consul kind, e.g.
|
|
`proxy-defaults` becomes `ProxyDefaults`.
|
|
1. `metadata.name` will be the `name` of the config entry.
|
|
1. `metadata.annotations` will contain the `"consul.hashicorp.com/migrate-entry": "true"`
|
|
annotation.
|
|
1. The namespace should be whatever namespace the service is deployed in.
|
|
For `ProxyDefaults`, we recommend the namespace that Consul is deployed in.
|
|
1. The contents of `spec` will be a transformation from JSON keys to YAML
|
|
keys.
|
|
|
|
The following keys can be ignored: `CreateIndex`, `ModifyIndex`
|
|
and any key that has an empty object, e.g. `"Expose": {}`.
|
|
|
|
For example:
|
|
|
|
```json
|
|
{
|
|
"Kind": "service-defaults",
|
|
"Name": "foo",
|
|
"Protocol": "http",
|
|
"MeshGateway": {},
|
|
"Expose": {},
|
|
"CreateIndex": 60,
|
|
"ModifyIndex": 60
|
|
}
|
|
```
|
|
|
|
Becomes:
|
|
|
|
```yaml
|
|
apiVersion: consul.hashicorp.com/v1alpha1
|
|
kind: ServiceDefaults
|
|
metadata:
|
|
name: foo
|
|
annotations:
|
|
'consul.hashicorp.com/migrate-entry': 'true'
|
|
spec:
|
|
protocol: 'http'
|
|
```
|
|
|
|
And
|
|
|
|
```json
|
|
{
|
|
"Kind": "proxy-defaults",
|
|
"Name": "global",
|
|
"MeshGateway": {
|
|
"Mode": "local"
|
|
},
|
|
"Config": {
|
|
"local_connect_timeout_ms": 1000,
|
|
"handshake_timeout_ms": 10000
|
|
},
|
|
"CreateIndex": 60,
|
|
"ModifyIndex": 60
|
|
}
|
|
```
|
|
|
|
Becomes:
|
|
|
|
```yaml
|
|
apiVersion: consul.hashicorp.com/v1alpha1
|
|
kind: ProxyDefaults
|
|
metadata:
|
|
name: global
|
|
annotations:
|
|
'consul.hashicorp.com/migrate-entry': 'true'
|
|
spec:
|
|
meshGateway:
|
|
mode: local
|
|
config:
|
|
# Note that anything under config for ProxyDefaults will use the exact
|
|
# same keys.
|
|
local_connect_timeout_ms: 1000
|
|
handshake_timeout_ms: 10000
|
|
```
|
|
|
|
1. Run `kubectl apply` to apply the Kubernetes resource.
|
|
1. Next, check that it synced successfully:
|
|
|
|
```shell-session
|
|
$ kubectl get servicedefaults foo
|
|
NAME SYNCED AGE
|
|
foo True 1s
|
|
```
|
|
|
|
1. If its `SYNCED` status is `True` then the migration for this config entry
|
|
was successful.
|
|
1. If its `SYNCED` status is `False`, use `kubectl describe` to view
|
|
the reason syncing failed:
|
|
|
|
```shell-session
|
|
$ kubectl describe servicedefaults foo
|
|
...
|
|
Status:
|
|
Conditions:
|
|
Last Transition Time: 2021-01-12T21:03:29Z
|
|
Message: migration failed: Kubernetes resource does not match existing Consul config entry: consul={...}, kube={...}
|
|
Reason: MigrationFailedError
|
|
Status: False
|
|
Type: Synced
|
|
```
|
|
|
|
The most likely reason is that the contents of the Kubernetes resource
|
|
don't match the Consul resource. Make changes to the Kubernetes resource
|
|
to match the Consul resource (ignoring the `CreateIndex`, `ModifyIndex` and `Meta` keys).
|
|
|
|
1. Once the `SYNCED` status is true, you can make changes to the resource and they
|
|
will get synced to Consul.
|