232 lines
9.1 KiB
Plaintext
232 lines
9.1 KiB
Plaintext
---
|
||
layout: docs
|
||
page_title: Upgrading to 1.6.9
|
||
description: >-
|
||
Specific versions of Consul may have additional information about the upgrade
|
||
process beyond the standard flow.
|
||
---
|
||
|
||
# Upgrading to 1.6.9
|
||
|
||
## Introduction
|
||
|
||
This guide explains how to best upgrade a multi-datacenter Consul deployment that is using
|
||
a version of Consul >= 1.2.4 and < 1.6.9 while maintaining replication. If you are on a version
|
||
older than 1.2.4, please review our [Upgrading to 1.2.4](/docs/upgrading/instructions/upgrade-to-1-2-x)
|
||
guide. Due to changes to the ACL system, an ACL token migration will need to be performed
|
||
as part of this upgrade. The 1.6.x series is the last series that had support for legacy
|
||
ACL tokens, so this migration _must_ happen before upgrading past the 1.6.x release series.
|
||
Here is some documentation that may prove useful for reference during this upgrade process:
|
||
|
||
- [ACL System in Legacy Mode](https://www.consul.io/docs/acl/acl-legacy) - You can find
|
||
information about legacy configuration options and differences between modes here.
|
||
- [Configuration](https://www.consul.io/docs/agent/options) - You can find more details
|
||
around legacy ACL and new ACL configuration options here. Legacy ACL config options
|
||
will be listed as deprecates as of 1.4.0.
|
||
|
||
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 >= 1.2.4 and < 1.6.9.
|
||
|
||
## 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.
|
||
- You have not already performed the ACL token migration. If you have, please skip all related
|
||
steps.
|
||
|
||
## Considerations
|
||
|
||
There are quite a number of changes between releases. Notable changes
|
||
are called out in our [Specific Version Details](/docs/upgrading/upgrade-specific#consul-1-6-3)
|
||
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.
|
||
|
||
Two very notable items are:
|
||
|
||
- 1.6.2 introduced more strict JSON decoding. Invalid JSON that was previously ignored might result in errors now (e.g., `Connect: null` in service definitions). See [[GH#6680](https://github.com/hashicorp/consul/pull/6680)].
|
||
- 1.6.3 introduced the [http_max_conns_per_client](https://www.consul.io/docs/agent/options.html#http_max_conns_per_client) limit. This defaults to 200. Prior to this, connections per client were unbounded. [[GH#7159](https://github.com/hashicorp/consul/issues/7159)]
|
||
|
||
## Procedure
|
||
|
||
**1.** Check the replication status of the primary datacenter (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 DC2 agents to version 1.6.9 by following our [General Upgrade Process](/docs/upgrading/instructions/general-process). _**Leave all DC1 agents at 1.2.4.**_ You should start observing log messages like this after that:
|
||
|
||
```log
|
||
2020/09/08 15:51:29 [DEBUG] acl: Cannot upgrade to new ACLs, servers in acl datacenter have not upgraded - found servers: true, mode: 3
|
||
2020/09/08 15:51:32 [ERR] consul: RPC failed to server 192.168.5.2:8300 in DC "dc1": rpc error making call: rpc: can't find service ConfigEntry.ListAll
|
||
```
|
||
|
||
!> **Warning:** _It is important to upgrade your primary datacenter **last**_ (the one
|
||
specified in `acl_datacenter`). If you upgrade the primary datacenter first, it will
|
||
break replication between your other datacenters. If you upgrade your other datacenters
|
||
first, they will be in legacy mode and replication from your primary datacenter will
|
||
continue working.
|
||
|
||
**4.** Check that replication is still working in DC2.
|
||
|
||
From a Consul server in DC2:
|
||
|
||
```shell-session
|
||
$ curl --silent --header "X-Consul-Token: $MASTER_TOKEN" localhost:8500/v1/acl/replication?pretty
|
||
$ curl --silent --header "X-Consul-Token: $MASTER_TOKEN" localhost:8500/v1/acl/list?pretty
|
||
```
|
||
|
||
Take note of the `ReplicatedIndex` value.
|
||
|
||
Create a new file containing the payload for creating a new token named `test-ui-token.json`
|
||
with the following contents:
|
||
|
||
<CodeBlockConfig filename="test-ui-token.json">
|
||
|
||
```json
|
||
{
|
||
"Name": "UI Token",
|
||
"Type": "client",
|
||
"Rules": "key \"\" { policy = \"write\" } node \"\" { policy = \"read\" } service \"\" { policy = \"read\" }"
|
||
}
|
||
```
|
||
|
||
</CodeBlockConfig>
|
||
|
||
From a Consul server in DC1, create a new token using that file:
|
||
|
||
```shell-session
|
||
$ curl --request PUT --header "X-Consul-Token: $MASTER_TOKEN" --data @test-ui-token.json localhost:8500/v1/acl/create
|
||
```
|
||
|
||
From a Consul server in DC2:
|
||
|
||
```shell-session
|
||
$ curl --silent --header "X-Consul-Token: $MASTER_TOKEN" "localhost:8500/v1/acl/replication?pretty"
|
||
$ curl --silent --header "X-Consul-Token: $MASTER_TOKEN" "localhost:8500/v1/acl/list?pretty"
|
||
```
|
||
|
||
`ReplicatedIndex` should have incremented and you should find the new token listed. If you try using CLI ACL commands you will receive this error:
|
||
|
||
```log
|
||
Failed to retrieve the token list: Unexpected response code: 500 (The ACL system is currently in legacy mode.)
|
||
```
|
||
|
||
This is because Consul in legacy mode. ACL CLI commands will not work and you have to hit the old ACL HTTP endpoints (which is why `curl` is being used above rather than the `consul` CLI client).
|
||
|
||
**5.** Upgrade DC1 agents to version 1.6.9 by following our [General Upgrade Process](/docs/upgrading/instructions/general-process).
|
||
|
||
Once this is complete, you should observe a log entry like this from your server agents:
|
||
|
||
```log
|
||
2020/09/10 22:11:49 [DEBUG] acl: transitioning out of legacy ACL mode
|
||
```
|
||
|
||
**6.** 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",
|
||
"ReplicationType": "tokens",
|
||
"ReplicatedIndex": 259,
|
||
"ReplicatedRoleIndex": 1,
|
||
"ReplicatedTokenIndex": 260,
|
||
"LastSuccess": "2020-09-10T22:11:51Z",
|
||
"LastError": "2020-09-10T22:11:43Z"
|
||
}
|
||
```
|
||
|
||
**6.** Migrate your legacy ACL tokens to the new ACL system by following the instructions in our [ACL Token Migration guide](https://www.consul.io/docs/acl/acl-migrate-tokens).
|
||
|
||
~> This step _must_ be completed before upgrading to a version higher than 1.6.x.
|
||
|
||
## Post-Upgrade Configuration Changes
|
||
|
||
When moving from a pre-1.4.0 version of Consul, you will find that several of the ACL-related
|
||
configuration options were renamed. Backwards compatibility is maintained in the 1.6.x release
|
||
series, so you are old config options will continue working after upgrading, but you will want to
|
||
update those now to avoid issues when moving to newer versions.
|
||
|
||
These are the changes you will need to make:
|
||
|
||
- `acl_datacenter` is now named `primary_datacenter` (review our [docs](https://www.consul.io/docs/agent/options#primary_datacenter) for more info)
|
||
- `acl_default_policy`, `acl_down_policy`, `acl_ttl`, `acl_*_token` and `enable_acl_replication` options are now specified like this (review our [docs](https://www.consul.io/docs/agent/options#acl) for more info):
|
||
```hcl
|
||
acl {
|
||
enabled = true/false
|
||
default_policy = "..."
|
||
down_policy = "..."
|
||
policy_ttl = "..."
|
||
role_ttl = "..."
|
||
enable_token_replication = true/false
|
||
enable_token_persistence = true/false
|
||
tokens {
|
||
master = "..."
|
||
agent = "..."
|
||
agent_master = "..."
|
||
replication = "..."
|
||
default = "..."
|
||
}
|
||
}
|
||
```
|
||
|
||
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.
|