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Configure Network Kernel Parameters #36
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| --- | ||
| - name: Amazon Linux 2 | Configure network kernel parameters | ||
| include_tasks: configure_network_kernel_parameters_al2.yaml |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| --- | ||
| # Check whether IPv6 is enabled | ||
| - name: "Check IPv6 enablement status" | ||
| ansible.builtin.shell: cat /sys/module/ipv6/parameters/disable | ||
| register: ipv6_disabled | ||
| changed_when: false | ||
| failed_when: false | ||
| become: true | ||
|
|
||
| # Persist kernel network parameters to sysctl config files | ||
| - name: "Persist sysctl parameters to configuration files" | ||
| ansible.builtin.lineinfile: | ||
| path: "{{ item.file }}" | ||
| create: yes | ||
| line: "{{ item.name }} = {{ item.value }}" | ||
| state: present | ||
| loop: "{{ sysctl_params }}" | ||
| loop_control: | ||
| label: "{{ item.name }}" | ||
| become: true | ||
|
|
||
| # Apply settings to the running kernel (IPv6 only if enabled) | ||
| - name: "Apply sysctl parameters at runtime" | ||
| ansible.builtin.shell: | | ||
| echo "Applying {{ item.name }} = {{ item.value }}" | ||
| sysctl -w {{ item.name }}={{ item.value }} | ||
| if [[ "{{ item.name }}" == net.ipv4.* ]]; then | ||
| sysctl -w net.ipv4.route.flush=1 | ||
| elif [[ "{{ item.name }}" == net.ipv6.* && -f /sys/module/ipv6/parameters/disable && "$(cat /sys/module/ipv6/parameters/disable)" = "0" ]]; then | ||
| sysctl -w net.ipv6.route.flush=1 | ||
| fi | ||
| loop: "{{ sysctl_params }}" | ||
| loop_control: | ||
| label: "{{ item.name }}" | ||
| when: not (item.name is search("ipv6") and ipv6_disabled.stdout is defined and ipv6_disabled.stdout.strip() != "0") | ||
| become: true | ||
|
|
||
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Use ansible module ansible.posix.sysctl