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Diffstat (limited to 'roles/kube_nfs_volumes')
| -rw-r--r-- | roles/kube_nfs_volumes/README.md | 114 | ||||
| -rw-r--r-- | roles/kube_nfs_volumes/defaults/main.yml | 16 | ||||
| -rw-r--r-- | roles/kube_nfs_volumes/handlers/main.yml | 3 | ||||
| -rw-r--r-- | roles/kube_nfs_volumes/library/partitionpool.py | 247 | ||||
| -rw-r--r-- | roles/kube_nfs_volumes/meta/main.yml | 17 | ||||
| -rw-r--r-- | roles/kube_nfs_volumes/tasks/main.yml | 34 | ||||
| -rw-r--r-- | roles/kube_nfs_volumes/tasks/nfs.yml | 23 | ||||
| l--------- | roles/kube_nfs_volumes/templates/v1/nfs.json.j2 | 1 | ||||
| -rw-r--r-- | roles/kube_nfs_volumes/templates/v1beta3/nfs.json.j2 | 23 |
9 files changed, 0 insertions, 478 deletions
diff --git a/roles/kube_nfs_volumes/README.md b/roles/kube_nfs_volumes/README.md deleted file mode 100644 index 8cf7c0cd4..000000000 --- a/roles/kube_nfs_volumes/README.md +++ /dev/null @@ -1,114 +0,0 @@ -# kube_nfs_volumes - -This role is useful to export disks as set of Kubernetes persistent volumes. -It does so by partitioning the disks, creating ext4 filesystem on each -partition, mounting the partitions, exporting the mounts via NFS and adding -these NFS shares as NFS persistent volumes to existing Kubernetes installation. - -All partitions on given disks are used as the persistent volumes, including -already existing partitions! There should be no other data (such as operating -system) on the disks! - -## Requirements - -* Ansible 2.2 -* Running Kubernetes with NFS persistent volume support (on a remote machine). -* Works only on RHEL/Fedora-like distros. - -## Role Variables - -``` -# Options of NFS exports. -nfs_export_options: "*(rw,no_root_squash,insecure,no_subtree_check)" - -# Directory, where the created partitions should be mounted. They will be -# mounted as <mount_dir>/sda1 etc. -mount_dir: /exports - -# Comma-separated list of disks to partition. -# This role always assumes that all partitions on these disks are used as -# physical volumes. -disks: /dev/sdb,/dev/sdc - -# Whether to re-partition already partitioned disks. -# Even though the disks won't get repartitioned on 'false', all existing -# partitions on the disk are exported via NFS as physical volumes! -force: false - -# Specification of size of partitions to create. See library/partitionpool.py -# for details. -sizes: 100M - -# URL of Kubernetes API server, incl. port. -kubernetes_url: https://10.245.1.2:6443 - -# Token to use for authentication to the API server -kubernetes_token: tJdce6Fn3cL1112YoIJ5m2exzAbzcPZX - -# API Version to use for kubernetes -kube_api_version: v1 -``` - -## Dependencies - -None - -## Example Playbook - -With this playbook, `/dev/sdb` is partitioned into 100MiB partitions, all of -them are mounted into `/exports/sdb<N>` directory and all these directories -are exported via NFS and added as physical volumes to Kubernetes running at -`https://10.245.1.2:6443`. - - - hosts: servers - roles: - - role: kube_nfs_volumes - disks: "/dev/sdb" - sizes: 100M - kubernetes_url: https://10.245.1.2:6443 - kubernetes_token: tJdce6Fn3cL1112YoIJ5m2exzAbzcPZX - -See library/partitionpool.py for details how `sizes` parameter can be used -to create partitions of various sizes. - -## Full example -Let's say there are two machines, 10.0.0.1 and 10.0.0.2, that we want to use as -NFS servers for our Kubernetes cluster, running Kubernetes public API at -https://10.245.1.2:6443. - -Both servers have three 1 TB disks, /dev/sda for the system and /dev/sdb and -/dev/sdc to be partitioned. We want to split the data disks into 5, 10 and -20 GiB partitions so that 10% of the total capacity is in 5 GiB partitions, 40% -in 10 GiB and 50% in 20 GiB partitions. - -That means, each data disk will have 20x 5 GiB, 40x 10 GiB and 25x 20 GiB -partitions. - -* Create an `inventory` file: - ``` - [nfsservers] - 10.0.0.1 - 10.0.0.2 - ``` - -* Create an ansible playbook, say `setupnfs.yaml`: - ``` - - hosts: nfsservers - become: yes - roles: - - role: kube_nfs_volumes - disks: "/dev/sdb,/dev/sdc" - sizes: 5G:10,10G:40,20G:50 - force: no - kubernetes_url: https://10.245.1.2:6443 - kubernetes_token: tJdce6Fn3cL1112YoIJ5m2exzAbzcPZX - ``` - -* Run the playbook: - ``` - ansible-playbook -i inventory setupnfs.yml - ``` - -## License - -Apache 2.0 diff --git a/roles/kube_nfs_volumes/defaults/main.yml b/roles/kube_nfs_volumes/defaults/main.yml deleted file mode 100644 index bdd994d07..000000000 --- a/roles/kube_nfs_volumes/defaults/main.yml +++ /dev/null @@ -1,16 +0,0 @@ ---- -kubernetes_url: https://172.30.0.1:443 - -kube_api_version: v1 - -kube_req_template: "../templates/{{ kube_api_version }}/nfs.json.j2" - -# Options of NFS exports. -nfs_export_options: "*(rw,no_root_squash,insecure,no_subtree_check)" - -# Directory, where the created partitions should be mounted. They will be -# mounted as <mount_dir>/sda1 etc. -mount_dir: /exports - -# Force re-partitioning the disks -force: false diff --git a/roles/kube_nfs_volumes/handlers/main.yml b/roles/kube_nfs_volumes/handlers/main.yml deleted file mode 100644 index 9ce8b783d..000000000 --- a/roles/kube_nfs_volumes/handlers/main.yml +++ /dev/null @@ -1,3 +0,0 @@ ---- -- name: restart nfs - systemd: name=nfs-server state=restarted diff --git a/roles/kube_nfs_volumes/library/partitionpool.py b/roles/kube_nfs_volumes/library/partitionpool.py deleted file mode 100644 index 1857433c7..000000000 --- a/roles/kube_nfs_volumes/library/partitionpool.py +++ /dev/null @@ -1,247 +0,0 @@ -#!/usr/bin/python -""" -Ansible module for partitioning. -""" - -from __future__ import print_function - -# There is no pyparted on our Jenkins worker -# pylint: disable=import-error -import parted - -DOCUMENTATION = """ ---- -module: partitionpool -short_description; Partition a disk into parititions. -description: - - Creates partitions on given disk based on partition sizes and their weights. - Unless 'force' option is set to True, it ignores already partitioned disks. - - When the disk is empty or 'force' is set to True, it always creates a new - GPT partition table on the disk. Then it creates number of partitions, based - on their weights. - - This module should be used when a system admin wants to split existing disk(s) - into pools of partitions of specific sizes. It is not intended as generic disk - partitioning module! - - Independent on 'force' parameter value and actual disk state, the task - always fills 'partition_pool' fact with all partitions on given disks, - together with their sizes (in bytes). E.g.: - partition_sizes = [ - { name: sda1, Size: 1048576000 }, - { name: sda2, Size: 1048576000 }, - { name: sdb1, Size: 1048576000 }, - ... - ] - -options: - disk: - description: - - Disk to partition. - size: - description: - - Sizes of partitions to create and their weights. Has form of: - <size1>[:<weigth1>][,<size2>[:<weight2>][,...]] - - Any <size> can end with 'm' or 'M' for megabyte, 'g/G' for gigabyte - and 't/T' for terabyte. Megabyte is used when no unit is specified. - - If <weight> is missing, 1.0 is used. - - From each specified partition <sizeX>, number of these partitions are - created so they occupy spaces represented by <weightX>, proportionally to - other weights. - - - Example 1: size=100G says, that the whole disk is split in number of 100 GiB - partitions. On 1 TiB disk, 10 partitions will be created. - - - Example 2: size=100G:1,10G:1 says that ratio of space occupied by 100 GiB - partitions and 10 GiB partitions is 1:1. Therefore, on 1 TiB disk, 500 GiB - will be split into five 100 GiB partition and 500 GiB will be split into fifty - 10GiB partitions. - - size=100G:1,10G:1 = 5x 100 GiB and 50x 10 GiB partitions (on 1 TiB disk). - - - Example 3: size=200G:1,100G:2 says that the ratio of space occupied by 200 GiB - partitions and 100GiB partition is 1:2. Therefore, on 1 TiB disk, 1/3 - (300 GiB) should be occupied by 200 GiB partitions. Only one fits there, - so only one is created (we always round nr. of partitions *down*). The rest - (800 GiB) is split into eight 100 GiB partitions, even though it's more - than 2/3 of total space - free space is always allocated as much as possible. - - size=200G:1,100G:2 = 1x 200 GiB and 8x 100 GiB partitions (on 1 TiB disk). - - - Example: size=200G:1,100G:1,50G:1 says that the ratio of space occupied by - 200 GiB, 100 GiB and 50 GiB partitions is 1:1:1. Therefore 1/3 of 1 TiB disk - is dedicated to 200 GiB partitions. Only one fits there and only one is - created. The rest (800 GiB) is distributed according to remaining weights: - 100 GiB vs 50 GiB is 1:1, we create four 100 GiB partitions (400 GiB in total) - and eight 50 GiB partitions (again, 400 GiB). - - size=200G:1,100G:1,50G:1 = 1x 200 GiB, 4x 100 GiB and 8x 50 GiB partitions - (on 1 TiB disk). - - force: - description: - - If True, it will always overwite partition table on the disk and create new one. - - If False (default), it won't change existing partition tables. - -""" - - -# It's not class, it's more a simple struct with almost no functionality. -# pylint: disable=too-few-public-methods -class PartitionSpec(object): - """ Simple class to represent required partitions.""" - def __init__(self, size, weight): - """ Initialize the partition specifications.""" - # Size of the partitions - self.size = size - # Relative weight of this request - self.weight = weight - # Number of partitions to create, will be calculated later - self.count = -1 - - def set_count(self, count): - """ Set count of parititions of this specification. """ - self.count = count - - -def assign_space(total_size, specs): - """ - Satisfy all the PartitionSpecs according to their weight. - In other words, calculate spec.count of all the specs. - """ - total_weight = 0.0 - for spec in specs: - total_weight += float(spec.weight) - - for spec in specs: - num_blocks = int((float(spec.weight) / total_weight) * (total_size / float(spec.size))) - spec.set_count(num_blocks) - total_size -= num_blocks * spec.size - total_weight -= spec.weight - - -def partition(diskname, specs, force=False, check_mode=False): - """ - Create requested partitions. - Returns nr. of created partitions or 0 when the disk was already partitioned. - """ - count = 0 - - dev = parted.getDevice(diskname) - try: - disk = parted.newDisk(dev) - except parted.DiskException: - # unrecognizable format, treat as empty disk - disk = None - - if disk and len(disk.partitions) > 0 and not force: - print("skipping", diskname) - return 0 - - # create new partition table, wiping all existing data - disk = parted.freshDisk(dev, 'gpt') - # calculate nr. of partitions of each size - assign_space(dev.getSize(), specs) - last_megabyte = 1 - for spec in specs: - for _ in range(spec.count): - # create the partition - start = parted.sizeToSectors(last_megabyte, "MiB", dev.sectorSize) - length = parted.sizeToSectors(spec.size, "MiB", dev.sectorSize) - geo = parted.Geometry(device=dev, start=start, length=length) - filesystem = parted.FileSystem(type='ext4', geometry=geo) - part = parted.Partition( - disk=disk, - type=parted.PARTITION_NORMAL, - fs=filesystem, - geometry=geo) - disk.addPartition(partition=part, constraint=dev.optimalAlignedConstraint) - last_megabyte += spec.size - count += 1 - try: - if not check_mode: - disk.commit() - except parted.IOException: - # partitions have been written, but we have been unable to inform the - # kernel of the change, probably because they are in use. - # Ignore it and hope for the best... - pass - return count - - -def parse_spec(text): - """ Parse string with partition specification. """ - tokens = text.split(",") - specs = [] - for token in tokens: - if ":" not in token: - token += ":1" - - (sizespec, weight) = token.split(':') - weight = float(weight) # throws exception with reasonable error string - - units = {"m": 1, "g": 1 << 10, "t": 1 << 20, "p": 1 << 30} - unit = units.get(sizespec[-1].lower(), None) - if not unit: - # there is no unit specifier, it must be just the number - size = float(sizespec) - unit = 1 - else: - size = float(sizespec[:-1]) - spec = PartitionSpec(int(size * unit), weight) - specs.append(spec) - return specs - - -def get_partitions(diskpath): - """ Return array of partition names for given disk """ - dev = parted.getDevice(diskpath) - disk = parted.newDisk(dev) - partitions = [] - for part in disk.partitions: - (_, _, pname) = part.path.rsplit("/") - partitions.append({"name": pname, "size": part.getLength() * dev.sectorSize}) - - return partitions - - -def main(): - """ Ansible module main method. """ - module = AnsibleModule( # noqa: F405 - argument_spec=dict( - disks=dict(required=True, type='str'), - force=dict(required=False, default="no", type='bool'), - sizes=dict(required=True, type='str') - ), - supports_check_mode=True, - ) - - disks = module.params['disks'] - force = module.params['force'] - if force is None: - force = False - sizes = module.params['sizes'] - - try: - specs = parse_spec(sizes) - except ValueError as ex: - err = "Error parsing sizes=" + sizes + ": " + str(ex) - module.fail_json(msg=err) - - partitions = [] - changed_count = 0 - for disk in disks.split(","): - try: - changed_count += partition(disk, specs, force, module.check_mode) - except Exception as ex: - err = "Error creating partitions on " + disk + ": " + str(ex) - raise - # module.fail_json(msg=err) - partitions += get_partitions(disk) - - module.exit_json(changed=(changed_count > 0), ansible_facts={"partition_pool": partitions}) - - -# ignore pylint errors related to the module_utils import -# pylint: disable=redefined-builtin, unused-wildcard-import, wildcard-import, wrong-import-order, wrong-import-position -# import module snippets -from ansible.module_utils.basic import * # noqa: E402,F403 -main() diff --git a/roles/kube_nfs_volumes/meta/main.yml b/roles/kube_nfs_volumes/meta/main.yml deleted file mode 100644 index 7ed028138..000000000 --- a/roles/kube_nfs_volumes/meta/main.yml +++ /dev/null @@ -1,17 +0,0 @@ ---- -galaxy_info: - author: Jan Safranek - description: Partition disks and use them as Kubernetes NFS physical volumes. - company: Red Hat, Inc. - license: license (Apache) - min_ansible_version: 2.2 - platforms: - - name: EL - versions: - - 7 - - name: Fedora - versions: - - all - categories: - - cloud -dependencies: [] diff --git a/roles/kube_nfs_volumes/tasks/main.yml b/roles/kube_nfs_volumes/tasks/main.yml deleted file mode 100644 index 67f709c8c..000000000 --- a/roles/kube_nfs_volumes/tasks/main.yml +++ /dev/null @@ -1,34 +0,0 @@ ---- -- fail: - msg: "This role is not yet supported on atomic hosts" - when: openshift.common.is_atomic | bool - -- name: Install pyparted (RedHat/Fedora) - package: name={{ item }} state=present - with_items: - - pyparted - - python-httplib2 - when: not openshift.common.is_containerized | bool - -- name: partition the drives - partitionpool: disks={{ disks }} force={{ force }} sizes={{ sizes }} - -- name: create filesystem - filesystem: fstype=ext4 dev=/dev/{{ item.name }} - with_items: "{{ partition_pool }}" - -- name: mount - mount: name={{mount_dir}}/{{ item.name }} src=/dev/{{ item.name }} state=mounted fstype=ext4 passno=2 - with_items: "{{ partition_pool }}" - -- include: nfs.yml - -- name: export physical volumes - uri: - url: "{{ kubernetes_url }}/api/{{ kube_api_version }}/persistentvolumes" - method: POST - body: "{{ lookup('template', kube_req_template) }}" - body_format: json - status_code: 201 - HEADER_Authorization: "Bearer {{ kubernetes_token }}" - with_items: "{{ partition_pool }}" diff --git a/roles/kube_nfs_volumes/tasks/nfs.yml b/roles/kube_nfs_volumes/tasks/nfs.yml deleted file mode 100644 index 9eeff9260..000000000 --- a/roles/kube_nfs_volumes/tasks/nfs.yml +++ /dev/null @@ -1,23 +0,0 @@ ---- -- name: Install NFS server - package: name=nfs-utils state=present - when: not openshift.common.is_containerized | bool - -- name: Start rpcbind on Fedora/Red Hat - systemd: - name: rpcbind - state: started - enabled: yes - -- name: Start nfs on Fedora/Red Hat - systemd: - name: nfs-server - state: started - enabled: yes - -- name: Export the directories - lineinfile: dest=/etc/exports - regexp="^{{ mount_dir }}/{{ item.name }} " - line="{{ mount_dir }}/{{ item.name }} {{nfs_export_options}}" - with_items: "{{ partition_pool }}" - notify: restart nfs diff --git a/roles/kube_nfs_volumes/templates/v1/nfs.json.j2 b/roles/kube_nfs_volumes/templates/v1/nfs.json.j2 deleted file mode 120000 index 49c1191bc..000000000 --- a/roles/kube_nfs_volumes/templates/v1/nfs.json.j2 +++ /dev/null @@ -1 +0,0 @@ -../v1beta3/nfs.json.j2
\ No newline at end of file diff --git a/roles/kube_nfs_volumes/templates/v1beta3/nfs.json.j2 b/roles/kube_nfs_volumes/templates/v1beta3/nfs.json.j2 deleted file mode 100644 index b42886ef1..000000000 --- a/roles/kube_nfs_volumes/templates/v1beta3/nfs.json.j2 +++ /dev/null @@ -1,23 +0,0 @@ -{ - "kind": "PersistentVolume", - "apiVersion": "v1beta3", - "metadata": { - "name": "pv-{{ inventory_hostname | regex_replace("\.", "-") }}-{{ item.name }}", - "labels": { - "type": "nfs" - } - }, - "spec": { - "capacity": { - "storage": "{{ item.size }}" - }, - "accessModes": [ - "ReadWriteOnce" - ], - "NFS": { - "Server": "{{ inventory_hostname }}", - "Path": "{{ mount_dir }}/{{ item.name }}", - "ReadOnly": false - } - } -} |