initial commit
This commit is contained in:
commit
619bb2e023
2
.gitignore
vendored
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2
.gitignore
vendored
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||||||
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config.json
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||||||
|
main
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13
LICENSE
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13
LICENSE
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||||||
|
Copyright (c) 2015, Kegan Myers <kegan@keganmyers.com>
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||||||
|
|
||||||
|
Permission to use, copy, modify, and/or distribute this software for any purpose
|
||||||
|
with or without fee is hereby granted, provided that the above copyright notice
|
||||||
|
and this permission notice appear in all copies.
|
||||||
|
|
||||||
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
|
||||||
|
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
||||||
|
FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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||||||
|
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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||||||
|
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
||||||
|
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
|
||||||
|
THIS SOFTWARE.
|
53
README.md
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53
README.md
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||||||
|
CFHA
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||||||
|
====
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||||||
|
CloudFlare High Availability monitor
|
||||||
|
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||||||
|
CFHA is a simple daemon that will continually monitor servers you specify and
|
||||||
|
add/remove them from a shared "A" record in cloudflare.
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||||||
|
|
||||||
|
Configuration
|
||||||
|
=============
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||||||
|
Configuring CFHA is done through a JSON file, which should be named config.json,
|
||||||
|
and placed in whatever directory you will run CFHA from.
|
||||||
|
|
||||||
|
Example configuration file:
|
||||||
|
|
||||||
|
```js
|
||||||
|
{
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||||||
|
"hosts": [ //an array of hosts to check
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||||||
|
{
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||||||
|
"host": "192.168.1.1", //the IP address of the host
|
||||||
|
"type": "http", //the type of check to run, can be either http or https
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||||||
|
"options": {} //optional additional parameters to the check module
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||||||
|
},
|
||||||
|
{
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||||||
|
"host": "192.168.1.2",
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||||||
|
"type": "https",
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||||||
|
"options": {
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||||||
|
"hostname": "lb-check-hostname" //this is the only currently supported parameter, and will be sent as the "host" header of an http(s) request
|
||||||
|
}
|
||||||
|
}
|
||||||
|
],
|
||||||
|
"cloudflare": { //cloudflare configuration
|
||||||
|
"email": "cfemail@example.com",
|
||||||
|
"apiKey": "CF_API_KEY", //get this from your cloudflare profile
|
||||||
|
"domain": "example.com", //the domain in cloudflare you will be operating on
|
||||||
|
"name": "lb.example.com", //the full dns record you wish to edit
|
||||||
|
"ttl": "1" //1 is automatic, otherwise see the cloudflare documentation on TTL
|
||||||
|
},
|
||||||
|
"interval": 1 //how often (in seconds) to ping the server, note that this is a number, not a string
|
||||||
|
}
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||||||
|
```
|
||||||
|
|
||||||
|
Limitations
|
||||||
|
===========
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||||||
|
CFHA is limited in a few ways, due both to the author, and due to limitations in cloudflare's API / how DNS works.
|
||||||
|
|
||||||
|
1. CFHA can only operate on `A` records since it is invalid to have multiple values for CNAME records.
|
||||||
|
2. You must specify each host by IP address because CFHA does not resolve names to IP addresses yet. (And we need to have IP addresses for A records). An interesting feature of implementing this is that you could create a pool A record and CFHA would monitor all of those via a single host entry pointing to that record, but it would require a lot more logic.
|
||||||
|
3. CFHA does not operate on IPv6. This is something that is possible (and maybe even simple) to implement, but has not yet been worked on.
|
||||||
|
4. CFHA is meant to operate on load balancers, and as such only checks for a 200 exit status on a host. You should add a name-based virtual host to nginx that returns 200 on each monitored server, and set the hostname in the check options.
|
||||||
|
|
||||||
|
License
|
||||||
|
=======
|
||||||
|
CFHA is made available under an ISC license. Anyone is welcome to make contributions with the understanding that they will be released under that same license.
|
362
cloudflare/LICENSE
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362
cloudflare/LICENSE
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|
||||||
|
Mozilla Public License, version 2.0
|
||||||
|
|
||||||
|
1. Definitions
|
||||||
|
|
||||||
|
1.1. "Contributor"
|
||||||
|
|
||||||
|
means each individual or legal entity that creates, contributes to the
|
||||||
|
creation of, or owns Covered Software.
|
||||||
|
|
||||||
|
1.2. "Contributor Version"
|
||||||
|
|
||||||
|
means the combination of the Contributions of others (if any) used by a
|
||||||
|
Contributor and that particular Contributor's Contribution.
|
||||||
|
|
||||||
|
1.3. "Contribution"
|
||||||
|
|
||||||
|
means Covered Software of a particular Contributor.
|
||||||
|
|
||||||
|
1.4. "Covered Software"
|
||||||
|
|
||||||
|
means Source Code Form to which the initial Contributor has attached the
|
||||||
|
notice in Exhibit A, the Executable Form of such Source Code Form, and
|
||||||
|
Modifications of such Source Code Form, in each case including portions
|
||||||
|
thereof.
|
||||||
|
|
||||||
|
1.5. "Incompatible With Secondary Licenses"
|
||||||
|
means
|
||||||
|
|
||||||
|
a. that the initial Contributor has attached the notice described in
|
||||||
|
Exhibit B to the Covered Software; or
|
||||||
|
|
||||||
|
b. that the Covered Software was made available under the terms of
|
||||||
|
version 1.1 or earlier of the License, but not also under the terms of
|
||||||
|
a Secondary License.
|
||||||
|
|
||||||
|
1.6. "Executable Form"
|
||||||
|
|
||||||
|
means any form of the work other than Source Code Form.
|
||||||
|
|
||||||
|
1.7. "Larger Work"
|
||||||
|
|
||||||
|
means a work that combines Covered Software with other material, in a
|
||||||
|
separate file or files, that is not Covered Software.
|
||||||
|
|
||||||
|
1.8. "License"
|
||||||
|
|
||||||
|
means this document.
|
||||||
|
|
||||||
|
1.9. "Licensable"
|
||||||
|
|
||||||
|
means having the right to grant, to the maximum extent possible, whether
|
||||||
|
at the time of the initial grant or subsequently, any and all of the
|
||||||
|
rights conveyed by this License.
|
||||||
|
|
||||||
|
1.10. "Modifications"
|
||||||
|
|
||||||
|
means any of the following:
|
||||||
|
|
||||||
|
a. any file in Source Code Form that results from an addition to,
|
||||||
|
deletion from, or modification of the contents of Covered Software; or
|
||||||
|
|
||||||
|
b. any new file in Source Code Form that contains any Covered Software.
|
||||||
|
|
||||||
|
1.11. "Patent Claims" of a Contributor
|
||||||
|
|
||||||
|
means any patent claim(s), including without limitation, method,
|
||||||
|
process, and apparatus claims, in any patent Licensable by such
|
||||||
|
Contributor that would be infringed, but for the grant of the License,
|
||||||
|
by the making, using, selling, offering for sale, having made, import,
|
||||||
|
or transfer of either its Contributions or its Contributor Version.
|
||||||
|
|
||||||
|
1.12. "Secondary License"
|
||||||
|
|
||||||
|
means either the GNU General Public License, Version 2.0, the GNU Lesser
|
||||||
|
General Public License, Version 2.1, the GNU Affero General Public
|
||||||
|
License, Version 3.0, or any later versions of those licenses.
|
||||||
|
|
||||||
|
1.13. "Source Code Form"
|
||||||
|
|
||||||
|
means the form of the work preferred for making modifications.
|
||||||
|
|
||||||
|
1.14. "You" (or "Your")
|
||||||
|
|
||||||
|
means an individual or a legal entity exercising rights under this
|
||||||
|
License. For legal entities, "You" includes any entity that controls, is
|
||||||
|
controlled by, or is under common control with You. For purposes of this
|
||||||
|
definition, "control" means (a) the power, direct or indirect, to cause
|
||||||
|
the direction or management of such entity, whether by contract or
|
||||||
|
otherwise, or (b) ownership of more than fifty percent (50%) of the
|
||||||
|
outstanding shares or beneficial ownership of such entity.
|
||||||
|
|
||||||
|
|
||||||
|
2. License Grants and Conditions
|
||||||
|
|
||||||
|
2.1. Grants
|
||||||
|
|
||||||
|
Each Contributor hereby grants You a world-wide, royalty-free,
|
||||||
|
non-exclusive license:
|
||||||
|
|
||||||
|
a. under intellectual property rights (other than patent or trademark)
|
||||||
|
Licensable by such Contributor to use, reproduce, make available,
|
||||||
|
modify, display, perform, distribute, and otherwise exploit its
|
||||||
|
Contributions, either on an unmodified basis, with Modifications, or
|
||||||
|
as part of a Larger Work; and
|
||||||
|
|
||||||
|
b. under Patent Claims of such Contributor to make, use, sell, offer for
|
||||||
|
sale, have made, import, and otherwise transfer either its
|
||||||
|
Contributions or its Contributor Version.
|
||||||
|
|
||||||
|
2.2. Effective Date
|
||||||
|
|
||||||
|
The licenses granted in Section 2.1 with respect to any Contribution
|
||||||
|
become effective for each Contribution on the date the Contributor first
|
||||||
|
distributes such Contribution.
|
||||||
|
|
||||||
|
2.3. Limitations on Grant Scope
|
||||||
|
|
||||||
|
The licenses granted in this Section 2 are the only rights granted under
|
||||||
|
this License. No additional rights or licenses will be implied from the
|
||||||
|
distribution or licensing of Covered Software under this License.
|
||||||
|
Notwithstanding Section 2.1(b) above, no patent license is granted by a
|
||||||
|
Contributor:
|
||||||
|
|
||||||
|
a. for any code that a Contributor has removed from Covered Software; or
|
||||||
|
|
||||||
|
b. for infringements caused by: (i) Your and any other third party's
|
||||||
|
modifications of Covered Software, or (ii) the combination of its
|
||||||
|
Contributions with other software (except as part of its Contributor
|
||||||
|
Version); or
|
||||||
|
|
||||||
|
c. under Patent Claims infringed by Covered Software in the absence of
|
||||||
|
its Contributions.
|
||||||
|
|
||||||
|
This License does not grant any rights in the trademarks, service marks,
|
||||||
|
or logos of any Contributor (except as may be necessary to comply with
|
||||||
|
the notice requirements in Section 3.4).
|
||||||
|
|
||||||
|
2.4. Subsequent Licenses
|
||||||
|
|
||||||
|
No Contributor makes additional grants as a result of Your choice to
|
||||||
|
distribute the Covered Software under a subsequent version of this
|
||||||
|
License (see Section 10.2) or under the terms of a Secondary License (if
|
||||||
|
permitted under the terms of Section 3.3).
|
||||||
|
|
||||||
|
2.5. Representation
|
||||||
|
|
||||||
|
Each Contributor represents that the Contributor believes its
|
||||||
|
Contributions are its original creation(s) or it has sufficient rights to
|
||||||
|
grant the rights to its Contributions conveyed by this License.
|
||||||
|
|
||||||
|
2.6. Fair Use
|
||||||
|
|
||||||
|
This License is not intended to limit any rights You have under
|
||||||
|
applicable copyright doctrines of fair use, fair dealing, or other
|
||||||
|
equivalents.
|
||||||
|
|
||||||
|
2.7. Conditions
|
||||||
|
|
||||||
|
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
|
||||||
|
Section 2.1.
|
||||||
|
|
||||||
|
|
||||||
|
3. Responsibilities
|
||||||
|
|
||||||
|
3.1. Distribution of Source Form
|
||||||
|
|
||||||
|
All distribution of Covered Software in Source Code Form, including any
|
||||||
|
Modifications that You create or to which You contribute, must be under
|
||||||
|
the terms of this License. You must inform recipients that the Source
|
||||||
|
Code Form of the Covered Software is governed by the terms of this
|
||||||
|
License, and how they can obtain a copy of this License. You may not
|
||||||
|
attempt to alter or restrict the recipients' rights in the Source Code
|
||||||
|
Form.
|
||||||
|
|
||||||
|
3.2. Distribution of Executable Form
|
||||||
|
|
||||||
|
If You distribute Covered Software in Executable Form then:
|
||||||
|
|
||||||
|
a. such Covered Software must also be made available in Source Code Form,
|
||||||
|
as described in Section 3.1, and You must inform recipients of the
|
||||||
|
Executable Form how they can obtain a copy of such Source Code Form by
|
||||||
|
reasonable means in a timely manner, at a charge no more than the cost
|
||||||
|
of distribution to the recipient; and
|
||||||
|
|
||||||
|
b. You may distribute such Executable Form under the terms of this
|
||||||
|
License, or sublicense it under different terms, provided that the
|
||||||
|
license for the Executable Form does not attempt to limit or alter the
|
||||||
|
recipients' rights in the Source Code Form under this License.
|
||||||
|
|
||||||
|
3.3. Distribution of a Larger Work
|
||||||
|
|
||||||
|
You may create and distribute a Larger Work under terms of Your choice,
|
||||||
|
provided that You also comply with the requirements of this License for
|
||||||
|
the Covered Software. If the Larger Work is a combination of Covered
|
||||||
|
Software with a work governed by one or more Secondary Licenses, and the
|
||||||
|
Covered Software is not Incompatible With Secondary Licenses, this
|
||||||
|
License permits You to additionally distribute such Covered Software
|
||||||
|
under the terms of such Secondary License(s), so that the recipient of
|
||||||
|
the Larger Work may, at their option, further distribute the Covered
|
||||||
|
Software under the terms of either this License or such Secondary
|
||||||
|
License(s).
|
||||||
|
|
||||||
|
3.4. Notices
|
||||||
|
|
||||||
|
You may not remove or alter the substance of any license notices
|
||||||
|
(including copyright notices, patent notices, disclaimers of warranty, or
|
||||||
|
limitations of liability) contained within the Source Code Form of the
|
||||||
|
Covered Software, except that You may alter any license notices to the
|
||||||
|
extent required to remedy known factual inaccuracies.
|
||||||
|
|
||||||
|
3.5. Application of Additional Terms
|
||||||
|
|
||||||
|
You may choose to offer, and to charge a fee for, warranty, support,
|
||||||
|
indemnity or liability obligations to one or more recipients of Covered
|
||||||
|
Software. However, You may do so only on Your own behalf, and not on
|
||||||
|
behalf of any Contributor. You must make it absolutely clear that any
|
||||||
|
such warranty, support, indemnity, or liability obligation is offered by
|
||||||
|
You alone, and You hereby agree to indemnify every Contributor for any
|
||||||
|
liability incurred by such Contributor as a result of warranty, support,
|
||||||
|
indemnity or liability terms You offer. You may include additional
|
||||||
|
disclaimers of warranty and limitations of liability specific to any
|
||||||
|
jurisdiction.
|
||||||
|
|
||||||
|
4. Inability to Comply Due to Statute or Regulation
|
||||||
|
|
||||||
|
If it is impossible for You to comply with any of the terms of this License
|
||||||
|
with respect to some or all of the Covered Software due to statute,
|
||||||
|
judicial order, or regulation then You must: (a) comply with the terms of
|
||||||
|
this License to the maximum extent possible; and (b) describe the
|
||||||
|
limitations and the code they affect. Such description must be placed in a
|
||||||
|
text file included with all distributions of the Covered Software under
|
||||||
|
this License. Except to the extent prohibited by statute or regulation,
|
||||||
|
such description must be sufficiently detailed for a recipient of ordinary
|
||||||
|
skill to be able to understand it.
|
||||||
|
|
||||||
|
5. Termination
|
||||||
|
|
||||||
|
5.1. The rights granted under this License will terminate automatically if You
|
||||||
|
fail to comply with any of its terms. However, if You become compliant,
|
||||||
|
then the rights granted under this License from a particular Contributor
|
||||||
|
are reinstated (a) provisionally, unless and until such Contributor
|
||||||
|
explicitly and finally terminates Your grants, and (b) on an ongoing
|
||||||
|
basis, if such Contributor fails to notify You of the non-compliance by
|
||||||
|
some reasonable means prior to 60 days after You have come back into
|
||||||
|
compliance. Moreover, Your grants from a particular Contributor are
|
||||||
|
reinstated on an ongoing basis if such Contributor notifies You of the
|
||||||
|
non-compliance by some reasonable means, this is the first time You have
|
||||||
|
received notice of non-compliance with this License from such
|
||||||
|
Contributor, and You become compliant prior to 30 days after Your receipt
|
||||||
|
of the notice.
|
||||||
|
|
||||||
|
5.2. If You initiate litigation against any entity by asserting a patent
|
||||||
|
infringement claim (excluding declaratory judgment actions,
|
||||||
|
counter-claims, and cross-claims) alleging that a Contributor Version
|
||||||
|
directly or indirectly infringes any patent, then the rights granted to
|
||||||
|
You by any and all Contributors for the Covered Software under Section
|
||||||
|
2.1 of this License shall terminate.
|
||||||
|
|
||||||
|
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
|
||||||
|
license agreements (excluding distributors and resellers) which have been
|
||||||
|
validly granted by You or Your distributors under this License prior to
|
||||||
|
termination shall survive termination.
|
||||||
|
|
||||||
|
6. Disclaimer of Warranty
|
||||||
|
|
||||||
|
Covered Software is provided under this License on an "as is" basis,
|
||||||
|
without warranty of any kind, either expressed, implied, or statutory,
|
||||||
|
including, without limitation, warranties that the Covered Software is free
|
||||||
|
of defects, merchantable, fit for a particular purpose or non-infringing.
|
||||||
|
The entire risk as to the quality and performance of the Covered Software
|
||||||
|
is with You. Should any Covered Software prove defective in any respect,
|
||||||
|
You (not any Contributor) assume the cost of any necessary servicing,
|
||||||
|
repair, or correction. This disclaimer of warranty constitutes an essential
|
||||||
|
part of this License. No use of any Covered Software is authorized under
|
||||||
|
this License except under this disclaimer.
|
||||||
|
|
||||||
|
7. Limitation of Liability
|
||||||
|
|
||||||
|
Under no circumstances and under no legal theory, whether tort (including
|
||||||
|
negligence), contract, or otherwise, shall any Contributor, or anyone who
|
||||||
|
distributes Covered Software as permitted above, be liable to You for any
|
||||||
|
direct, indirect, special, incidental, or consequential damages of any
|
||||||
|
character including, without limitation, damages for lost profits, loss of
|
||||||
|
goodwill, work stoppage, computer failure or malfunction, or any and all
|
||||||
|
other commercial damages or losses, even if such party shall have been
|
||||||
|
informed of the possibility of such damages. This limitation of liability
|
||||||
|
shall not apply to liability for death or personal injury resulting from
|
||||||
|
such party's negligence to the extent applicable law prohibits such
|
||||||
|
limitation. Some jurisdictions do not allow the exclusion or limitation of
|
||||||
|
incidental or consequential damages, so this exclusion and limitation may
|
||||||
|
not apply to You.
|
||||||
|
|
||||||
|
8. Litigation
|
||||||
|
|
||||||
|
Any litigation relating to this License may be brought only in the courts
|
||||||
|
of a jurisdiction where the defendant maintains its principal place of
|
||||||
|
business and such litigation shall be governed by laws of that
|
||||||
|
jurisdiction, without reference to its conflict-of-law provisions. Nothing
|
||||||
|
in this Section shall prevent a party's ability to bring cross-claims or
|
||||||
|
counter-claims.
|
||||||
|
|
||||||
|
9. Miscellaneous
|
||||||
|
|
||||||
|
This License represents the complete agreement concerning the subject
|
||||||
|
matter hereof. If any provision of this License is held to be
|
||||||
|
unenforceable, such provision shall be reformed only to the extent
|
||||||
|
necessary to make it enforceable. Any law or regulation which provides that
|
||||||
|
the language of a contract shall be construed against the drafter shall not
|
||||||
|
be used to construe this License against a Contributor.
|
||||||
|
|
||||||
|
|
||||||
|
10. Versions of the License
|
||||||
|
|
||||||
|
10.1. New Versions
|
||||||
|
|
||||||
|
Mozilla Foundation is the license steward. Except as provided in Section
|
||||||
|
10.3, no one other than the license steward has the right to modify or
|
||||||
|
publish new versions of this License. Each version will be given a
|
||||||
|
distinguishing version number.
|
||||||
|
|
||||||
|
10.2. Effect of New Versions
|
||||||
|
|
||||||
|
You may distribute the Covered Software under the terms of the version
|
||||||
|
of the License under which You originally received the Covered Software,
|
||||||
|
or under the terms of any subsequent version published by the license
|
||||||
|
steward.
|
||||||
|
|
||||||
|
10.3. Modified Versions
|
||||||
|
|
||||||
|
If you create software not governed by this License, and you want to
|
||||||
|
create a new license for such software, you may create and use a
|
||||||
|
modified version of this License if you rename the license and remove
|
||||||
|
any references to the name of the license steward (except to note that
|
||||||
|
such modified license differs from this License).
|
||||||
|
|
||||||
|
10.4. Distributing Source Code Form that is Incompatible With Secondary
|
||||||
|
Licenses If You choose to distribute Source Code Form that is
|
||||||
|
Incompatible With Secondary Licenses under the terms of this version of
|
||||||
|
the License, the notice described in Exhibit B of this License must be
|
||||||
|
attached.
|
||||||
|
|
||||||
|
Exhibit A - Source Code Form License Notice
|
||||||
|
|
||||||
|
This Source Code Form is subject to the
|
||||||
|
terms of the Mozilla Public License, v.
|
||||||
|
2.0. If a copy of the MPL was not
|
||||||
|
distributed with this file, You can
|
||||||
|
obtain one at
|
||||||
|
http://mozilla.org/MPL/2.0/.
|
||||||
|
|
||||||
|
If it is not possible or desirable to put the notice in a particular file,
|
||||||
|
then You may include the notice in a location (such as a LICENSE file in a
|
||||||
|
relevant directory) where a recipient would be likely to look for such a
|
||||||
|
notice.
|
||||||
|
|
||||||
|
You may add additional accurate notices of copyright ownership.
|
||||||
|
|
||||||
|
Exhibit B - "Incompatible With Secondary Licenses" Notice
|
||||||
|
|
||||||
|
This Source Code Form is "Incompatible
|
||||||
|
With Secondary Licenses", as defined by
|
||||||
|
the Mozilla Public License, v. 2.0.
|
19
cloudflare/README.md
Normal file
19
cloudflare/README.md
Normal file
|
@ -0,0 +1,19 @@
|
||||||
|
# Note
|
||||||
|
This is a modification of the original `github.com/pearkes/cloudflare` package, and has changes
|
||||||
|
that align with the goals of the `cfha` project. Don't
|
||||||
|
|
||||||
|
## cloudflare
|
||||||
|
|
||||||
|
This package provides the `cloudflare` package which offers
|
||||||
|
an interface to the CloudFlare gAPI.
|
||||||
|
|
||||||
|
It's intentionally designed to make heavy use of built-ins and strings
|
||||||
|
in place of custom data structures and proper types. It also only implements
|
||||||
|
specific endpoints, and doesn't have full API coverage.
|
||||||
|
|
||||||
|
**For those reasons, I recommend looking elsewhere if you just need
|
||||||
|
a standard CloudFlare API client.**
|
||||||
|
|
||||||
|
### Documentation
|
||||||
|
|
||||||
|
The full documentation is available on [Godoc](http://godoc.org/github.com/pearkes/cloudflare)
|
109
cloudflare/api.go
Normal file
109
cloudflare/api.go
Normal file
|
@ -0,0 +1,109 @@
|
||||||
|
package cloudflare
|
||||||
|
|
||||||
|
import (
|
||||||
|
"encoding/json"
|
||||||
|
"fmt"
|
||||||
|
"io/ioutil"
|
||||||
|
"net/http"
|
||||||
|
"net/url"
|
||||||
|
)
|
||||||
|
|
||||||
|
// Client provides a client to the CloudflAre API
|
||||||
|
type Client struct {
|
||||||
|
// Access Token
|
||||||
|
Token string
|
||||||
|
|
||||||
|
// User Email
|
||||||
|
Email string
|
||||||
|
|
||||||
|
// URL to the DO API to use
|
||||||
|
URL string
|
||||||
|
|
||||||
|
// HttpClient is the client to use. Default will be
|
||||||
|
// used if not provided.
|
||||||
|
Http *http.Client
|
||||||
|
}
|
||||||
|
|
||||||
|
// NewClient returns a new cloudflare client,
|
||||||
|
// requires an authorization token. You can generate
|
||||||
|
// an OAuth token by visiting the Apps & API section
|
||||||
|
// of the CloudflAre control panel for your account.
|
||||||
|
//-Can't return an error
|
||||||
|
func NewClient(email string, token string) (*Client) {
|
||||||
|
//-Removed environment grabbing
|
||||||
|
client := Client{
|
||||||
|
Token: token,
|
||||||
|
Email: email,
|
||||||
|
URL: "https://www.cloudflare.com/api_json.html",
|
||||||
|
Http: http.DefaultClient,
|
||||||
|
}
|
||||||
|
return &client
|
||||||
|
}
|
||||||
|
|
||||||
|
// Creates a new request with the params
|
||||||
|
func (c *Client) NewRequest(params map[string]string, method string, action string) (*http.Request, error) {
|
||||||
|
p := url.Values{}
|
||||||
|
u, err := url.Parse(c.URL)
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
// Build up our request parameters
|
||||||
|
for k, v := range params {
|
||||||
|
p.Add(k, v)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Add authentication details
|
||||||
|
p.Add("tkn", c.Token)
|
||||||
|
p.Add("email", c.Email)
|
||||||
|
|
||||||
|
// The "action" to take against the API
|
||||||
|
p.Add("a", action)
|
||||||
|
|
||||||
|
// Add the params to our URL
|
||||||
|
u.RawQuery = p.Encode()
|
||||||
|
|
||||||
|
// Build the request
|
||||||
|
req, err := http.NewRequest(method, u.String(), nil)
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
return req, nil
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
// decodeBody is used to JSON decode a body
|
||||||
|
func decodeBody(resp *http.Response, out interface{}) error {
|
||||||
|
body, err := ioutil.ReadAll(resp.Body)
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
if err = json.Unmarshal(body, &out); err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// checkResp wraps http.Client.Do() and verifies that the
|
||||||
|
// request was successful. A non-200 request returns an error
|
||||||
|
// formatted to included any validation problems or otherwise
|
||||||
|
func checkResp(resp *http.Response, err error) (*http.Response, error) {
|
||||||
|
// If the err is already there, there was an error higher
|
||||||
|
// up the chain, so just return that
|
||||||
|
if err != nil {
|
||||||
|
return resp, err
|
||||||
|
}
|
||||||
|
|
||||||
|
switch i := resp.StatusCode; {
|
||||||
|
case i == 200:
|
||||||
|
return resp, nil
|
||||||
|
default:
|
||||||
|
return nil, fmt.Errorf("API Error: %s", resp.Status)
|
||||||
|
}
|
||||||
|
}
|
189
cloudflare/record.go
Normal file
189
cloudflare/record.go
Normal file
|
@ -0,0 +1,189 @@
|
||||||
|
package cloudflare
|
||||||
|
|
||||||
|
import (
|
||||||
|
"fmt"
|
||||||
|
)
|
||||||
|
|
||||||
|
//~Return the actual error when possible
|
||||||
|
|
||||||
|
type RecordsResponse struct {
|
||||||
|
Response struct {
|
||||||
|
Recs struct {
|
||||||
|
Records []Record `json:"objs"`
|
||||||
|
} `json:"recs"`
|
||||||
|
} `json:"response"`
|
||||||
|
Result string `json:"result"`
|
||||||
|
Message string `json:"msg"`
|
||||||
|
}
|
||||||
|
|
||||||
|
//-Removed wildcard option
|
||||||
|
func (r *RecordsResponse) FindRecordByName(name string) ([]Record, error) {
|
||||||
|
if r.Result == "error" {
|
||||||
|
return nil, fmt.Errorf("API Error: %s", r.Message)
|
||||||
|
}
|
||||||
|
|
||||||
|
objs := r.Response.Recs.Records
|
||||||
|
|
||||||
|
var recs []Record
|
||||||
|
|
||||||
|
//-Removed errror on no results
|
||||||
|
//-Removed wildcard checking
|
||||||
|
//~Checking against FullName, not just name
|
||||||
|
|
||||||
|
for _, v := range objs {
|
||||||
|
if v.FullName == name {
|
||||||
|
recs = append(recs, v)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return recs, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
type RecordResponse struct {
|
||||||
|
Response struct {
|
||||||
|
Rec struct {
|
||||||
|
Record Record `json:"obj"`
|
||||||
|
} `json:"rec"`
|
||||||
|
} `json:"response"`
|
||||||
|
Result string `json:"result"`
|
||||||
|
Message string `json:"msg"`
|
||||||
|
}
|
||||||
|
|
||||||
|
func (r *RecordResponse) GetRecord() (*Record, error) {
|
||||||
|
if r.Result == "error" {
|
||||||
|
return nil, fmt.Errorf("API Error: %s", r.Message)
|
||||||
|
}
|
||||||
|
|
||||||
|
return &r.Response.Rec.Record, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// Record is used to represent a retrieved Record. All properties
|
||||||
|
// are set as strings.
|
||||||
|
type Record struct {
|
||||||
|
Id string `json:"rec_id"`
|
||||||
|
Domain string `json:"zone_name"`
|
||||||
|
Name string `json:"display_name"`
|
||||||
|
FullName string `json:"name"`
|
||||||
|
Value string `json:"content"`
|
||||||
|
Type string `json:"type"`
|
||||||
|
Priority string `json:"prio"`
|
||||||
|
Ttl string `json:"ttl"`
|
||||||
|
}
|
||||||
|
|
||||||
|
// CreateRecord contains the request parameters to create a new
|
||||||
|
// record.
|
||||||
|
type CreateRecord struct {
|
||||||
|
Type string
|
||||||
|
Name string
|
||||||
|
Content string
|
||||||
|
Ttl string
|
||||||
|
Priority string
|
||||||
|
}
|
||||||
|
|
||||||
|
// CreateRecord creates a record from the parameters specified and
|
||||||
|
// returns an error if it fails. If no error and the name is returned,
|
||||||
|
// the Record was succesfully created.
|
||||||
|
func (c *Client) CreateRecord(domain string, opts *CreateRecord) (*Record, error) {
|
||||||
|
// Make the request parameters
|
||||||
|
params := make(map[string]string)
|
||||||
|
//-No option checking, we set them all ourselves
|
||||||
|
params["z"] = domain
|
||||||
|
params["type"] = opts.Type
|
||||||
|
params["name"] = opts.Name
|
||||||
|
params["content"] = opts.Content
|
||||||
|
params["prio"] = opts.Priority
|
||||||
|
params["ttl"] = "1"
|
||||||
|
|
||||||
|
req, err := c.NewRequest(params, "POST", "rec_new")
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
resp, err := checkResp(c.Http.Do(req))
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
recordResp := new(RecordResponse)
|
||||||
|
|
||||||
|
err = decodeBody(resp, &recordResp)
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
record, err := recordResp.GetRecord()
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
// The request was successful
|
||||||
|
return record, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// DestroyRecord destroys a record by the ID specified and
|
||||||
|
// returns an error if it fails. If no error is returned,
|
||||||
|
// the Record was succesfully destroyed.
|
||||||
|
func (c *Client) DestroyRecord(domain string, id string) error {
|
||||||
|
params := make(map[string]string)
|
||||||
|
params["z"] = domain
|
||||||
|
params["id"] = id
|
||||||
|
|
||||||
|
req, err := c.NewRequest(params, "POST", "rec_delete")
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
resp, err := checkResp(c.Http.Do(req))
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
recordResp := new(RecordResponse)
|
||||||
|
|
||||||
|
err = decodeBody(resp, &recordResp)
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
_, err = recordResp.GetRecord()
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
// The request was successful
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func (c *Client) RetrieveRecordsByName(domain string, name string) ([]Record, error) {
|
||||||
|
params := make(map[string]string)
|
||||||
|
params["z"] = domain
|
||||||
|
|
||||||
|
req, err := c.NewRequest(params, "GET", "rec_load_all")
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
resp, err := checkResp(c.Http.Do(req))
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
records := new(RecordsResponse)
|
||||||
|
|
||||||
|
err = decodeBody(resp, records)
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
record, err := records.FindRecordByName(name)
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
// The request was successful
|
||||||
|
return record, nil
|
||||||
|
}
|
31
main.go
Normal file
31
main.go
Normal file
|
@ -0,0 +1,31 @@
|
||||||
|
package main
|
||||||
|
|
||||||
|
import (
|
||||||
|
"log"
|
||||||
|
"fmt"
|
||||||
|
"io/ioutil"
|
||||||
|
"encoding/json"
|
||||||
|
"./monitor"
|
||||||
|
)
|
||||||
|
|
||||||
|
func main() {
|
||||||
|
file, err := ioutil.ReadFile("./config.json")
|
||||||
|
if err != nil {
|
||||||
|
log.Fatal(fmt.Sprintf("%v\n", err))
|
||||||
|
}
|
||||||
|
|
||||||
|
c := monitor.Config{}
|
||||||
|
json.Unmarshal(file, &c)
|
||||||
|
|
||||||
|
handlers := make([]monitor.GenericHandler, 2)
|
||||||
|
handlers[0] = monitor.NewLogHandler()
|
||||||
|
handlers[1] = monitor.NewCloudflareHandler(c.Cloudflare)
|
||||||
|
|
||||||
|
engine := monitor.CreateEngine(handlers)
|
||||||
|
|
||||||
|
for _, endpoint := range c.Hosts {
|
||||||
|
monitor.CreateCheck(c.Interval, engine, endpoint)
|
||||||
|
}
|
||||||
|
|
||||||
|
select{}
|
||||||
|
}
|
75
monitor/cloudflare.go
Normal file
75
monitor/cloudflare.go
Normal file
|
@ -0,0 +1,75 @@
|
||||||
|
package monitor
|
||||||
|
|
||||||
|
import (
|
||||||
|
"../cloudflare"
|
||||||
|
"log"
|
||||||
|
"fmt"
|
||||||
|
)
|
||||||
|
|
||||||
|
func NewCloudflareHandler(config CloudflareConfig) GenericHandler {
|
||||||
|
return runHandler(make(chan Transition, 5), &cloudflareHandler{
|
||||||
|
config,
|
||||||
|
cloudflare.NewClient(config.Email, config.ApiKey),
|
||||||
|
make(map[string]bool),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
type cloudflareHandler struct{
|
||||||
|
config CloudflareConfig
|
||||||
|
client *cloudflare.Client
|
||||||
|
actuallyDownHosts map[string]bool
|
||||||
|
}
|
||||||
|
|
||||||
|
func (this *cloudflareHandler) handle(transition Transition) {
|
||||||
|
switch transition.To {
|
||||||
|
case Down:
|
||||||
|
log.Print(fmt.Sprintf(
|
||||||
|
"Removed cloudflare record for `%s`: `%v`\n",
|
||||||
|
transition.RecordValue,
|
||||||
|
removeCloudflareRecord(this.client, this.config, transition.RecordValue)))
|
||||||
|
|
||||||
|
case Up:
|
||||||
|
log.Print(fmt.Sprintf(
|
||||||
|
"Added cloudflare record for `%s`: `%v`\n",
|
||||||
|
transition.RecordValue,
|
||||||
|
addCloudflareRecord(this.client, this.config, transition.RecordValue)))
|
||||||
|
|
||||||
|
case Unknown: //just leave it how it was, going up/down is idempotent anyways
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func removeCloudflareRecord(client *cloudflare.Client, config CloudflareConfig, recordValue string) bool {
|
||||||
|
records, err := client.RetrieveRecordsByName(config.Domain, config.Name)
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return false
|
||||||
|
}
|
||||||
|
|
||||||
|
exitStatus := true
|
||||||
|
for _, record := range records {
|
||||||
|
if record.Value != recordValue {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
|
||||||
|
exitStatus = exitStatus && client.DestroyRecord(config.Domain, record.Id) == nil
|
||||||
|
}
|
||||||
|
|
||||||
|
return exitStatus
|
||||||
|
}
|
||||||
|
|
||||||
|
func addCloudflareRecord(client *cloudflare.Client, config CloudflareConfig, recordValue string) bool {
|
||||||
|
opts := cloudflare.CreateRecord{
|
||||||
|
"A",
|
||||||
|
config.Name,
|
||||||
|
recordValue,
|
||||||
|
"1",
|
||||||
|
"0",
|
||||||
|
}
|
||||||
|
|
||||||
|
_, err := client.CreateRecord(config.Domain, &opts)
|
||||||
|
|
||||||
|
if err != nil {
|
||||||
|
return fmt.Sprintf("%s", err) == "API Error: The record already exists."
|
||||||
|
}
|
||||||
|
return true
|
||||||
|
}
|
21
monitor/config.go
Normal file
21
monitor/config.go
Normal file
|
@ -0,0 +1,21 @@
|
||||||
|
package monitor
|
||||||
|
|
||||||
|
type HostConfig struct {
|
||||||
|
Host string
|
||||||
|
Type string
|
||||||
|
Options map[string]string
|
||||||
|
}
|
||||||
|
|
||||||
|
type CloudflareConfig struct {
|
||||||
|
Email string
|
||||||
|
ApiKey string
|
||||||
|
Domain string
|
||||||
|
Name string
|
||||||
|
Ttl string
|
||||||
|
}
|
||||||
|
|
||||||
|
type Config struct {
|
||||||
|
Cloudflare CloudflareConfig
|
||||||
|
Hosts []HostConfig
|
||||||
|
Interval uint16
|
||||||
|
}
|
70
monitor/createCheck.go
Normal file
70
monitor/createCheck.go
Normal file
|
@ -0,0 +1,70 @@
|
||||||
|
package monitor
|
||||||
|
|
||||||
|
import (
|
||||||
|
"net/http"
|
||||||
|
"time"
|
||||||
|
"log"
|
||||||
|
"fmt"
|
||||||
|
)
|
||||||
|
|
||||||
|
type checkConfig struct {
|
||||||
|
engine *Engine
|
||||||
|
interval time.Duration
|
||||||
|
host HostConfig
|
||||||
|
}
|
||||||
|
|
||||||
|
type httpChecker struct {
|
||||||
|
client *http.Client
|
||||||
|
config checkConfig
|
||||||
|
endpoint string
|
||||||
|
}
|
||||||
|
|
||||||
|
func (this *httpChecker) run() {
|
||||||
|
log.Print(fmt.Sprintf("Starting: %v\n", this.config.host))
|
||||||
|
for true {
|
||||||
|
this.config.engine.Input<- Result{
|
||||||
|
this.config.host.Host,
|
||||||
|
this.check(),
|
||||||
|
}
|
||||||
|
time.Sleep(this.config.interval)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (this *httpChecker) check() Status {
|
||||||
|
req, err := http.NewRequest("GET", this.endpoint, nil)
|
||||||
|
if err != nil {
|
||||||
|
log.Print(fmt.Sprintf("Stopping: %v due to http NewRequest error\n", this.config.host))
|
||||||
|
return Unknown
|
||||||
|
}
|
||||||
|
req.Header.Set("Host", this.config.host.Options["hostname"])
|
||||||
|
return this.determineHttpCheckStatus(this.client.Do(req))
|
||||||
|
}
|
||||||
|
|
||||||
|
func (this *httpChecker) determineHttpCheckStatus(res *http.Response, err error) Status {
|
||||||
|
if err != nil || res.StatusCode != 200 {
|
||||||
|
return Down
|
||||||
|
}
|
||||||
|
return Up
|
||||||
|
}
|
||||||
|
|
||||||
|
func newHttpChecker(config checkConfig) *httpChecker {
|
||||||
|
checker := httpChecker{
|
||||||
|
&http.Client{},
|
||||||
|
config,
|
||||||
|
config.host.Type + "://" + config.host.Host + "/",
|
||||||
|
}
|
||||||
|
go checker.run()
|
||||||
|
return &checker
|
||||||
|
}
|
||||||
|
|
||||||
|
func CreateCheck(interval uint16, engine *Engine, host HostConfig) {
|
||||||
|
config := checkConfig{
|
||||||
|
engine,
|
||||||
|
time.Duration(int64(interval)) * time.Second,
|
||||||
|
host,
|
||||||
|
}
|
||||||
|
switch host.Type {
|
||||||
|
case "http", "https":
|
||||||
|
newHttpChecker(config)
|
||||||
|
}
|
||||||
|
}
|
51
monitor/engine.go
Normal file
51
monitor/engine.go
Normal file
|
@ -0,0 +1,51 @@
|
||||||
|
package monitor
|
||||||
|
|
||||||
|
import (
|
||||||
|
)
|
||||||
|
|
||||||
|
type Engine struct {
|
||||||
|
Input chan Result
|
||||||
|
output []GenericHandler
|
||||||
|
}
|
||||||
|
|
||||||
|
func CreateEngine(handlers []GenericHandler) *Engine {
|
||||||
|
input := make(chan Result)
|
||||||
|
|
||||||
|
engine := Engine{
|
||||||
|
input,
|
||||||
|
handlers,
|
||||||
|
}
|
||||||
|
|
||||||
|
e := &engine
|
||||||
|
|
||||||
|
go e.startProcessor()
|
||||||
|
|
||||||
|
return e
|
||||||
|
}
|
||||||
|
|
||||||
|
func (this *Engine) startProcessor() {
|
||||||
|
statuses := make(map[string]Status)
|
||||||
|
for true {
|
||||||
|
result := <-this.Input
|
||||||
|
|
||||||
|
//No transition if we don't exist
|
||||||
|
if result.Status == statuses[result.RecordValue] {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
|
||||||
|
//Create a record with to, from
|
||||||
|
change := Transition{
|
||||||
|
result.Status,
|
||||||
|
statuses[result.RecordValue],
|
||||||
|
result.RecordValue,
|
||||||
|
}
|
||||||
|
|
||||||
|
//Send the record to everyone who cares
|
||||||
|
for _, relay := range this.output {
|
||||||
|
relay.channel<- change
|
||||||
|
}
|
||||||
|
|
||||||
|
//And set our new status
|
||||||
|
statuses[result.RecordValue] = result.Status
|
||||||
|
}
|
||||||
|
}
|
20
monitor/handler.go
Normal file
20
monitor/handler.go
Normal file
|
@ -0,0 +1,20 @@
|
||||||
|
package monitor
|
||||||
|
|
||||||
|
type handler interface{
|
||||||
|
handle(transition Transition)
|
||||||
|
}
|
||||||
|
|
||||||
|
type GenericHandler struct {
|
||||||
|
channel chan Transition
|
||||||
|
}
|
||||||
|
|
||||||
|
func runHandler(input chan Transition, handler handler) GenericHandler {
|
||||||
|
go func() {
|
||||||
|
for true {
|
||||||
|
handler.handle(<-input)
|
||||||
|
}
|
||||||
|
}()
|
||||||
|
return GenericHandler{
|
||||||
|
input,
|
||||||
|
}
|
||||||
|
}
|
19
monitor/log.go
Normal file
19
monitor/log.go
Normal file
|
@ -0,0 +1,19 @@
|
||||||
|
package monitor
|
||||||
|
|
||||||
|
import (
|
||||||
|
"fmt"
|
||||||
|
"log"
|
||||||
|
)
|
||||||
|
|
||||||
|
func NewLogHandler() GenericHandler {
|
||||||
|
return runHandler(make(chan Transition), &logHandler{})
|
||||||
|
}
|
||||||
|
|
||||||
|
type logHandler struct{}
|
||||||
|
|
||||||
|
func (this *logHandler) handle(transition Transition) {
|
||||||
|
log.Print(fmt.Sprintf(
|
||||||
|
"`%s` has become `%d` - `%s`",
|
||||||
|
transition.RecordValue, transition.To,
|
||||||
|
transition.To.String()))
|
||||||
|
}
|
6
monitor/result.go
Normal file
6
monitor/result.go
Normal file
|
@ -0,0 +1,6 @@
|
||||||
|
package monitor
|
||||||
|
|
||||||
|
type Result struct {
|
||||||
|
RecordValue string
|
||||||
|
Status Status
|
||||||
|
}
|
27
monitor/transition.go
Normal file
27
monitor/transition.go
Normal file
|
@ -0,0 +1,27 @@
|
||||||
|
package monitor
|
||||||
|
|
||||||
|
type Status int
|
||||||
|
|
||||||
|
const (
|
||||||
|
Unknown Status = iota
|
||||||
|
Up Status = iota
|
||||||
|
Down Status = iota
|
||||||
|
)
|
||||||
|
|
||||||
|
func (t Status) String() string {
|
||||||
|
if t == Unknown {
|
||||||
|
return "Unknown"
|
||||||
|
} else if t == Up {
|
||||||
|
return "Up"
|
||||||
|
} else if t == Down {
|
||||||
|
return "Down"
|
||||||
|
}
|
||||||
|
return ""
|
||||||
|
}
|
||||||
|
|
||||||
|
type Transition struct {
|
||||||
|
To Status
|
||||||
|
From Status
|
||||||
|
RecordValue string
|
||||||
|
}
|
||||||
|
|
Loading…
Reference in a new issue