mirror of https://github.com/status-im/consul.git
131 lines
4.8 KiB
Plaintext
131 lines
4.8 KiB
Plaintext
---
|
||
layout: docs
|
||
page_title: Upgrading to Latest 1.2.x
|
||
description: >-
|
||
Specific versions of Consul may have additional information about the upgrade
|
||
process beyond the standard flow.
|
||
---
|
||
|
||
# Upgrading to Latest 1.2.x
|
||
|
||
## Introduction
|
||
|
||
This guide explains how to best upgrade a multi-datacenter Consul deployment that is using
|
||
a version of Consul >= 0.8.5 and < 1.2.4 while maintaining replication. If you are on a version
|
||
older than 0.8.5, but are in the 0.8.x series, please upgrade to 0.8.5 by following our
|
||
[General Upgrade Process](/consul/docs/upgrading/instructions/general-process). If you are on a version
|
||
older than 0.8.0, please [contact support](https://support.hashicorp.com).
|
||
|
||
In this guide, we will be using an example with two datacenters (DCs) and will be
|
||
referring to them as DC1 and DC2. DC1 will be the primary datacenter.
|
||
|
||
## Requirements
|
||
|
||
- All Consul servers should be on a version of Consul >= 0.8.5 and < 1.2.4.
|
||
- You need a Consul cluster with at least 3 nodes to perform this upgrade as documented. If
|
||
you either have a single node cluster or several single node clusters joined via WAN, the
|
||
servers will come up in a `No cluster leader` loop after upgrading. If that happens, you will
|
||
need to recover the cluster using the method described [here](/consul/tutorials/datacenter-operations/recovery-outage#manual-recovery-using-peers-json).
|
||
You can avoid this issue entirely by growing your cluster to 3 nodes prior to upgrading.
|
||
|
||
## Assumptions
|
||
|
||
This guide makes the following assumptions:
|
||
|
||
- You have at least two datacenters configured and have ACL replication enabled. If you are
|
||
not using multiple datacenters, you can follow along and simply skip the instructions related
|
||
to replication.
|
||
|
||
## Considerations
|
||
|
||
There are not too many major changes that might cause issues upgrading from 1.0.8, but notable changes
|
||
are called out in our [Specific Version Details](/consul/docs/upgrading/upgrade-specific#consul-1-1-0)
|
||
page. You can find more granular details in the full [changelog](https://github.com/hashicorp/consul/blob/main/CHANGELOG.md#124-november-27-2018).
|
||
Looking through these changes prior to upgrading is highly recommended.
|
||
|
||
## Procedure
|
||
|
||
**1.** Check replication status in DC1 by issuing the following curl command from a
|
||
consul server in that DC:
|
||
|
||
```shell-session
|
||
$ curl --silent --header "X-Consul-Token: $MASTER_TOKEN" localhost:8500/v1/acl/replication?pretty
|
||
```
|
||
|
||
You should receive output similar to this:
|
||
|
||
```json
|
||
{
|
||
"Enabled": false,
|
||
"Running": false,
|
||
"SourceDatacenter": "",
|
||
"ReplicatedIndex": 0,
|
||
"LastSuccess": "0001-01-01T00:00:00Z",
|
||
"LastError": "0001-01-01T00:00:00Z"
|
||
}
|
||
```
|
||
|
||
-> The primary datacenter (indicated by `acl_datacenter`) will always show as having replication
|
||
disabled, so this is normal even if replication is happening.
|
||
|
||
**2.** Check replication status in DC2 by issuing the following curl command from a
|
||
consul server in that DC:
|
||
|
||
```shell-session
|
||
$ curl --silent --header "X-Consul-Token: $MASTER_TOKEN" localhost:8500/v1/acl/replication?pretty
|
||
```
|
||
|
||
You should receive output similar to this:
|
||
|
||
```json
|
||
{
|
||
"Enabled": true,
|
||
"Running": true,
|
||
"SourceDatacenter": "dc1",
|
||
"ReplicatedIndex": 9,
|
||
"LastSuccess": "2020-09-10T21:16:15Z",
|
||
"LastError": "0001-01-01T00:00:00Z"
|
||
}
|
||
```
|
||
|
||
**3.** Upgrade the Consul agents in all DCs to version 1.2.4 by following our [General Upgrade Process](/consul/docs/upgrading/instructions/general-process).
|
||
This should be done one DC at a time, leaving the primary DC for last.
|
||
|
||
**4.** Confirm that replication is still working in DC2 by issuing the following curl command from a
|
||
consul server in that DC:
|
||
|
||
```shell-session
|
||
$ curl --silent --header "X-Consul-Token: $MASTER_TOKEN" localhost:8500/v1/acl/replication?pretty
|
||
```
|
||
|
||
You should receive output similar to this:
|
||
|
||
```json
|
||
{
|
||
"Enabled": true,
|
||
"Running": true,
|
||
"SourceDatacenter": "dc1",
|
||
"ReplicatedIndex": 9,
|
||
"LastSuccess": "2020-09-10T21:16:15Z",
|
||
"LastError": "0001-01-01T00:00:00Z"
|
||
}
|
||
```
|
||
|
||
## Post-Upgrade Configuration Changes
|
||
|
||
If you moved from a pre-1.0.0 version of Consul, you will find that _many_ of the configuration
|
||
options were renamed. Backwards compatibility has been maintained, so your old config options
|
||
will continue working after upgrading, but you will want to update those now to avoid issues when
|
||
moving to newer versions.
|
||
|
||
The full list of changes is available here:
|
||
|
||
- [Upgrade Specific Versions: Consul 1.0 - Deprecated Options](/consul/docs/upgrading/upgrade-specific#deprecated-options-have-been-removed)
|
||
|
||
You can make sure your config changes are valid by copying your existing configuration files,
|
||
making the changes, and then verifying them by using `consul validate $CONFIG_FILE1_PATH $CONFIG_FILE2_PATH ...`.
|
||
|
||
Once your config is passing the validation check, replace your old config files with the new ones
|
||
and slowly roll your cluster again one server at a time – leaving the leader agent for last in each
|
||
datacenter.
|